Response to the NEON RFI TITLE: STREON Stream observational network Assessing the resistance and resilience of aquatic ecosystems to global change 1. Submitting Domain(s) or Consortia: STREON, a group of 60 doctoral stream research scientists with interests in continental patterns in stream ecology and terrestrial/ aquatic interfaces 2. RFI Response: Research Design Observational 3. Lead Scientists Dr. Walter K. Dodds Division of Biology Kansas State University Manhattan, KS 66506 785 532 6998 wkdodds@ksu.edu Dr. Margaret A. Palmer Chesapeake Biological Lab University of Maryland Center for Environmental Science Solomons, MD 20688 410 326 7241 mpalmer@umd.edu Dr Bradley J. Cardinale Dept of Ecology, Evolution & Marine Biology University of California Santa Barbara Santa Barbara, CA 93106 805 893 4157 cardinale@lifesci.ucsb.edu 4. Key Contributing Scientists: Steering Committee Dr. Nancy B. Grimm Dr. Sherri L. Johnson School of Life Sciences USFS PNW Research Station Arizona State University 3200 SW Jefferson Way Corvallis, OR 97331 PO Box 874501 541 758 7771 Tempe, AZ 85287-4501 480 965 4735 johnsons@fsl.orst.edu nbgrimm@asu.edu Dr. Stephen K. Hamilton Dr. Matt Whiles Michigan State University Southern Illinois University Kellogg Biological Station Department of Zoology 3700 E. Gull Lake Dr. Life Sciences II, Room 351 Hickory Corners, MI 49060 Carbondale, IL 62901-6501 616 671 2231 618 453 7639 hamilton@kbs.msu.edu mwhiles@zoology.siu.edu 1 Additional Affiliated Scientists Scientists J. Dunham B. Bowden J. Melack J. Jones T. Tsegaye C. Pringle M. Valett S. S. Kaushal J. Boyer J. Trexler D. McKnight D. White M. Bernot C. Hargrave S. Earl J. Tank K. Gido G. Tribble M. Kido W. McDowell M. Whiles E. Stanley J. Vander Zanden P. Mulholland B. Peterson L. Deegan J. Ehleringer T. Crowl E. Strauss C. Dahm K. Miller J. Sabo A. Huryn A. Ward C.C. Vaughn L.J. Weider R. O. Hall L. Wei Institution Oregon State Univ. Univ. of Vermont Univ. of California, Santa Barbara Univ. of Alaska, Fairbanks Alabama A & M Univ. Univ. of Georgia Virginia Polytechnic Institute and State Univ. Univ. of Maryland Florida International Univ. Florida International Univ. Univ. of Colorado Murray State Univ. Murray State Univ. Sam Houston State Univ. Arizona State Univ. Univ. of Notre Dame Kansas State Univ. Univ. of Hawaii Univ. of Hawaii Univ. of New Hampshire Southern Illinois Univ. Univ. of Wisconsin Univ. of Wisconsin Oakridge National Laboratory Marine Biological Laboratory Woods Hole Marine Biological Laboratory Woods Hole Univ. of Utah Utah State Univ. Fort Hays State Univ. Univ. of New Mexico Univ. of New Mexico Arizona State Univ. Univ. of Alabama Univ. of Alabama Univ. of Oklahoma Univ. of Oklahoma Univ. of Wyoming South Dakota State Univ. Site Andrews Experimental Forest Arctic California Caribou Poker Creek Cole Spring Branch Coweeta Coweeta Code AND ARC SNV CPC CSB CWT CWT Eastern Coastal Plain Everglades Everglades Green Lakes Valley; Albion townsite Hancock Biological Station Hancock Biological Station Harmon Creek Indian Bend Wash Kellogg Biological Station Konza Prairie Biological Station Limahuli Stream, Kauai, Hawaii Limahuli Stream, Kauai, Hawaii Luquillo Middle Mississippi River Wetlands Northern Lake District Northern Lake District Oak Ridge Walker Branch Plum Island ACL FCE FCE GLV HBS HBS HAR IBL KBS KNZ LIM LIM LUQ MMW NTL NTL ORW PIE Plum Island PIE Red Butte Creek Red Butte Creek Saline River Sevilleta Sevilleta Sycamore Creek Talladega Forest Talladega Forest Univ. of Oklahoma Biological Station Univ. of Oklahoma Biological Station Upper Snake River Williston Research Extension Center RBC RBC SAL SEV SEV SYC TAL TAL UOBS UOBS SNK WRE 2 I. Abstract/Summary Human activities have greatly altered freshwater ecosystems, including depletion and degradation of freshwater supplies, increased nutrient loads, and diminished biodiversity. We know little of how these changes will individually and collectively influence the resistance and resilience of ecosystems in light of climate change. Accordingly, we propose a long-term, continent-wide observational network to detail the mechanisms by which aquatic ecosystems resist and recover from three of the most pervasive forms of human-induced disturbance. This information is central to accurate ecological forecasting. We will focus on streams, rivers, and wetlands, hereafter collectively referred to as streams. Streams are disproportionately important for biodiversity, ecosystem services, and economic, recreational and aesthetic values. Our overarching question is: how will chronic nutrient inputs (nitrogen or phosphorus), higher probabilities of extreme events (droughts and floods), and simplification of food webs (loss of consumers) impact the resistance and resilience of stream ecosystem function (stream-wide respiration, production, and nutrient retention)? We define resistance and resilience as the proportional change in ecosystem functions following a disturbance and the return interval, respectively. There is strong justification for linking the ecosystem drivers that are the subject of this proposal. Streams and other running waters are ideal ecosystems for the proposed network because they (i) have well delimited inputs and outputs, and thus allow quantification of the resistance and resilience of the focal ecosystem-level processes, (ii) are dynamic systems that respond to disturbances over periods of weeks to months - time scales amenable to observation and experimentation, (iii) can be studied with comparable methods spanning the entire continent, (iv) are important sites of nutrient retention and (v) integrate watershed processes that occur on the same scales as those investigated by NEON network sensor platforms. Many of these attributes are unique and allow some types of cross continental observations that are simply not feasible with other ecosystems. We propose 30 observational sites distributed across the continent to capture variation in hydrology, temperature, nutrient loading, elevation, and biogeographical context. Each observational site will require two aquatic sensor packages to enable study of the effects of instream ecosystem processes on water in transit through the study reach. We will also require additional measurements not in the ISEP including total N and total P, decomposition rates, nutrient limitation assays, dissolved gas analyses, and food web analyses using natural abundance of stable isotopes. These additional measurements are required to adequately characterize aquatic community structure and ecosystem function. This ecological observatory network will complement emerging networks related to water bodies that focus on physical and chemical properties (i.e., EPA-WATERS), and existing networks of long-term ecological studies that have used a variety of methods and site selection protocols (i.e., LTER, USGS hydrologic benchmark stations). This is one of two linked responses to the NEON RFI’s for observational and experimental continental networks of stream research. Some sections of these two responses are very similar (Scientific Challenge, table of measurements) and others are different given the different requirements of the two RFI’s (e.g. site information, education and outreach, experimental design). The observational network will rigorously assess major drivers influencing streams and wetlands and how they link to other habitats. The experimental network strengthens the inference for a relatively low added cost. 3 II. Scientific Challenge Human impacts on Earth's ecosystems are now so pervasive that few systems can be considered ‘pristine’. Transformation of natural landscapes has benefited society (e.g., food and energy production), but comes at a high cost including a more extreme and unpredictable climate (Zachos et al. 2001), depletion and degradation of freshwater (Postel et al. 1996), and a catastrophic loss of biological diversity (Sala et al. 2000, MEA 2005). We know much about the drivers of ecological change, but far less about the potential for ecological systems to adapt, recover, resist further change, or enter irreversible trajectories. Societal responses depend on an adequate understanding of how our actions constrain our options in the future. Thus, ecological forecasting requires identification of the mechanisms underlying ecosystem resistance change and internal feedbacks contributing to resilience (MA 2003). Here we propose a 10-year, continent-wide observational network to detail the mechanisms by which aquatic ecosystems resist and recover from three of the most pervasive forms of human-induced disturbance. Our observational network will link divers of ecological change in streams. We focus on streams, rivers, and wetlands (hereafter streams for brevity) because they are the most economically valuable per unit area of any ecosystem and are primary sources of food and drinkable water (Baron et al. 2002). Streams integrate the effects of human activities on the landscape indicating environmental change across spatial scales. Forms of human-induced disturbance we will focus on are (i) chronic nutrient enrichment, (ii) altered frequencies of floods & droughts, and (iii) alteration of food-web structure. Humans have roughly doubled the availability of nitrogen (N) and phosphorus (P) in stream networks, leading to eutrophication of streams and downstream water bodies (Meybeck & Helmer 1989, Kemp et al. 2005). As the climate changes over the next century, streams will experience a greater frequency of floods and droughts due to an accelerated hydrologic cycle (Poff et al. 2002, Nelson & Palmer in press). Furthermore, the extinction rate of freshwater biota exceeds that for most marine or terrestrial fauna with top trophic levels at highest risk (Allan & Flecker 1993, Ricciardi & Rasmusen 1999). Streams are ideal ecosystems for the proposed network because they (i) have well delimited inputs and outputs, and thus allow quantification of the resistance and resilience of the focal ecosystem-level processes (Peterson et al. 2001), (ii) are dynamic systems that respond to disturbances over periods of weeks to months - time scales amenable to observation (iii) can be studied with comparable methods spanning the entire continent, (iv) are important sites of nutrient retention (Alexander et al. 2000, Wollheim et al. 2006) and (v) integrate watershed processes that occur on the same scales as those investigated by NEON network sensor platforms. Many of these attributes are unique and allow some types of cross continental observations that are infeasible in other ecosystems. II.1 Our overarching question is: how will chronic nutrient inputs (nitrogen or phosphorus), higher probabilities of extreme events (droughts and floods), and simplification of food webs (loss of consumers) impact the resistance and resilience of stream and wetland ecosystem function indicated by whole ecosystem respiration, production, and nutrient retention? We define resistance and resilience as the proportional change in ecosystem functions following a disturbance and the return interval, respectively. Strong justification exists for linking the ecosystem drivers (independent variables) that are the subject of this proposal. First, theoretical and empirical work has shown that community structure and ecosystem function are jointly influenced by disturbances, and nutrient loading can regulate rates of recovery (Wilson & Tilman 1993, Amarasekare et al. 2004, Cardinale et al. 2006). Similarly, 4 nutrients and consumers interact because top-down and bottom-up controls have opposing impacts on community structure and function (Kneitel & Chase 2004, Borer et al. 2006). Furthermore, biodiversity and ecosystems are linked because resource capture and community production depend on numbers and types of resources and species (Tilman 1999, Chapin et al. 2000, Swan & Palmer 2006). When combined, this prior research leads to at least two related predictions that have not been broadly approached at the continental scale or across major biomes as we propose. First, the biomass and activity of basal species (autotrophs and microbial heterotrophs at the base of food webs) depend on the relative impacts of two opposing forces: (i) hydrologic disturbance and primary consumers that reduce producer biomass and mediate species coexistence, vs. (ii) nutrient loading that promotes biomass production and favors basal species with high turnover (Dodds et al. 2004) and growth rates (traits that favor resilience). Second, as (i) and (ii) alter activity and biomass of basal species, they alter ecosystem functions, such as productivity, respiration, and nutrient retention. As such, they can also alter the relative importance of the two main pathways of energy flux through a foodweb – the producer vs. detrital pathways. II.2 Our hypotheses (below) are directly related to both of NEON’s Grand Challenges. By assessing the direction and pace by which stream ecosystems respond to and recover from human-induced stressors (nutrient loading & altered hydrology), H1 (II.4) squarely addresses Grand Challenge I. We even go a step further to examine interactions among drivers that may limit ecosystem response. H2 and H3 (II.4) are directed at Grand Challenge II because we will observe all 3 main drivers across a wide variety of sites. Importantly, our cross-domain approach will capture patterns of responses across most major biomes in North America, as well as sites within biomes that differ in terms of historical context. II.3 Toolbox Each of the 30observational sites will require two aquatic sensor packages and include biodiversity assessment. II.4 Hypotheses and expected results H1 Interactions among key drivers: The resistance and resilience of ecosystem functioning (stream productivity, respiration, nutrient cycling and retention) are jointly determined by the frequency of extreme hydrologic events (droughts/floods), the rate of nutrient loading, and food web structure. We expect both nutrient loading and pulsed hydrologic disturbances to decrease nutrient retention. Primary and secondary production should increase with greater nutrient loading as should rates of microbial decomposition, leading to more rapid recovery (resilience) from pulsed disturbances compared to an undisturbed state. However, with greater flood and drought frequency, primary and secondary production and consumer control on basal system ecosystem functions will decrease. Interaction between loading and disturbance will thus amplify ecosystem variability. Increasing the frequency of extreme events will promote dominance by a subset of disturbance resistant taxa or resilient species with high growth and colonization rates. Increased nutrients will make detrital food sources more available to consumers, shifting the food web to a more heterotrophic state (Johnson et al. 2006). H2 Time scales of ecosystem feedbacks and regime shifts: Long term nutrient loading and increased frequency of hydrological disturbance interact to promote irreversible ‘regime’ shifts that alter resistance and resilience of ecosystem functioning to droughts/floods (hydrologic disturbance). Nutrient loading will shift algal community structure to favor taxa that are less 5 palatable to herbivores (mostly invertebrates and fish), while also increasing the quality of detritus that is consumed primarily by fungi and bacteria (e.g., C:N detrital ratios decrease with nutrient loading, Dodds et al. 2004). Loss of primary consumers may be further exacerbated by increasing frequency of hydrologic disturbances that preclude the recovery of larger primary consumers. As top-down control by herbivores is jointly reduced by nutrient loading and hydrological disturbances, ecosystem-level processes will shift from producer to decomposer pathways, the resistance of ecosystem functioning to hydrologic disturbance will decrease, and the resilience increase (see H1). Regime shifts resulting from the extinction of consumers may take years to occur, and long-term studies are required to detect more than just the transient phases of ecosystem response. H3 Spatial scales of response: The resilience and recovery of ecosystem functioning over large (continental) scales will vary with regional context including local species composition and diversity, climate and hydrological disturbance regime. Community structure and ecosystem function vary with both local conditions, as well as across biogeographic scales. Thus, a continental-scale observational network is needed to elucidate the context dependency of ecological responses. Nutrient loading and flow disturbance vary greatly across the gradient of sites we have selected, allowing us to test hypotheses that would be impossible to test at single sites. We predict that sites with chronic nutrient loading (e.g., U.S. farm belt) are closest to critical points for regime shifts in response to added loading. We predict ecological context will be important. For example, streams with closed canopies have detritus-dominated food webs while open-canopy systems have prominent algal producers supporting food webs. Evolutionary context also matters; herbivorous fish and invertebrate grazers dominate in southern and northern streams respectively and are expected to react differently when exposed to floods and drought. II.5 Why is NEON required for the proposed work? The interaction between altered flow regimes and biotic communities under chronic nutrient pollution (Peterson et al. 1985) has received little attention and has not been studied broadly across systems with standard instrumentation. Development of broadly applicable predictive frameworks of ecological resilience require observations at continental scales (Palmer and Bernhardt 2006). A long-term observational network is necessary because some effects such as nutrient saturation and changes in species composition may take decades to manifest themselves (Slavik et al. 2004) and historical and existing differences influencing ecological response (context-dependency) typically occur over fairly broad regions. These differences include many human impacts (e.g. atmospheric vs. terrestrial N loading), as well as gradients of precipitation, temperature and hydrologic regimes that form the adaptive template freshwater organisms have experienced over evolutionary time (Poff 1996). The standard NEON aquatic instrumentation with some modification is ideally suited for the proposed network, and a modest number of auxiliary measurements coordinated through a common NEON facility will allow for comprehensive quantification of stream ecosystem properties. II.6 How the measurements collected will be used in predictive models for forecasting The conceptual approach of our observation network is ultimately tied to valuable ecosystem goods and services (e.g., water purification, biodiversity, production of exploitable species, nutrient cycling and retention). We require a continental observational network because of the complex interactions and potential feedbacks between ecosystem function and community structure. 6 Predictive modeling cannot capture system dynamics without accounting for these feedbacks. Our observational network has a high probability of documenting the pace and extent of impacts of human alterations on freshwater ecosystems, and providing information useful to predictive forecasting models. Number of sites Discharge (L/s) III. Deployment Configuration III.1 Spatial arrangement of gradient sites Our observational network will take advantage of continental gradients in nutrient loading and climatic regimes (e.g., arid to humid), We will focus on effects of: 1) chronic nutrient enrichment via atmospheric deposition of nitrogen (high rates in the northeast and lower in many areas of the rest of country); 2) diversity of consumers (context dependence of sites driven by biogeographic patterns, invasive species, and stresses from human induced change); and, 3) hydrologic variation among regions. Stream ecosystem responses to hydrologic variability including floods and drought will be measured as the events naturally occur. We include sites representing a wide range of mean discharge, stream permanence, and watershed area. The graphs below illustrate the distribution of watershed area, discharge, mean air temperature, and precipitation for the selected observational sites. Sites span a number of other geomorphologic 100000 and biotic gradients that will help us untangle the 10000 context-dependent nature of stream responses to global change. These include gradients of temperature (north1000 south), precipitation (east-west), elevation (sea level to 100 3200 m) and evolutionary history (species-poor areas in 10 northern glaciated areas, species-rich areas associated 1 1 10 100 1000 10000 100000 1000000 with the southeastern US). Sites are distributed across Watershed area (ha) all NEON domains. We also focus on particular areas of 9 rapid change or human impact (urban, cropland, hydrologic 8 modification). For example, sites within the Prairie Peninsula 7 domain have similar annual temperatures but differ in N 6 deposition, and urban sites such as those in Phoenix and the 5 Midwest were selected to be in regions of rapid groundwater 4 withdrawal. Core wild land sites will be interspersed with 3 human impacted sites to assess more localized gradients of 2 human impacts. 1 0 We have also planned that some of the sites within -15 -10 -5 0 5 10 15 20 25 30 Air temperature ( C) domains will represent areas of rapid environmental change 14 (urban sites such as Phoenix, Midwest sites in regions of rapid groundwater withdrawal, and agricultural sites in the Central 12 US). Core wild land sites will be interspersed with human 10 impacted sites to assess more localized gradients of human 8 impacts. Number of sites o 6 4 2 0 0 500 1000 1500 2000 2500 3000 3500 Pre ci pitation (m m) 7 III.2 Spatial arrangement of infrastructure The figure above demonstrates the large scale placement of observational sites with respect to NEON domains. Several smaller scale considerations for sites will apply. When possible sites will be placed near locations where historic data are available or experiments have been performed. Examples include sites that are part of the LTER network or are near USGS gauging stations. Whenever possible sites will be placed in a watershed containing the footprint of NEON terrestrial tower/sensor systems, or at least in a comparable watershed. At the smallest spatial scale sites will be chosen where discharge can be estimated with pressure transducers (either in areas with channel constrictions or construction of small weirs). At this scale sites will also be chosen where equipment can be secured against flooding and tampering. Each site will have two aquatic sensor packages to allow for input/output budgeting. At the smallest scale, the two sensor packages and auxiliary measurement sites will be placed about one uptake length (Sw) apart for the dominant limiting nutrient. The distance will also be chosen to be appropriate based upon gas exchange (reaeration) rates. 8 Proposed sites span wide gradients of precipitation, N deposition, and mean maximum temperature. Plots at right refer to transects depicted as lines on maps at their left. Letter name codes give approximate locations of sites (indicated by purple dots on map) along the gradient. These are only a few of the potential gradients and are presented here for illustrative purposes. 9 III.3a,b,c,d Proposed locations at core sites Name of location Dom. Property owner Latitude Longitude Primary property access point Road Road Andrews Experimental Forest Arctic 16 18 44.207340 68.633333 -122.256965 -148.283333 Caribou Poker Creek 19 US Forest Service BLM Research Natural Area University of Alaska 65.160000 -147.500000 Road, ATV trails Green Lakes Valley Konza/ Kings Creek Northern Lake District Luquillo/ Bisley 13 6 5 4 City of Boulder, CO Nature Conservancy State of Wisconsin USFS 40.042875 39.103807 46.012000 18.316330 -105.592296 -96.595539 -89.672000 -65.748020 Road Road Dirt road Road Oak Ridge Reservation / Walker Branch Rio Salado Talladega Forest 7 US Department of Energy 35.573168 -84.164504 Road 14 8 BLM US Forest Service 34.3358 32.953200 -107.0392 -87.409000 Road Road Candidate gradient sites. Name of location Dom Property owner California Sierra Nevada 17 Cole Spring Branch Coweeta Eastern coastal plain 8 7 2 Entrada Field Station Everglades Hancock Biological Station/Ledbetter Creek Harmon Creek 13 4 8 Indian Bend Wash 14 Kellogg/ Augusta Creek Limahuli Stream, Kauai, Hawaii 5 20 Los Angeles Dept of Water & Power, Nature Conservancy UDSA Forest Service American Chestnut Land Trust USGS NPS, Department of Interior Commonwealth of Kentucky/TVA Sam Houston State University numerous private and municipal Michigan State University National Tropical Botanical Garden Middle Mississippi River Wetlands Field Station 6 Plum Island 1 Red Butte Creek in Red Butte Canyon RNA Saline River San Pedro River Sycamore Creek University of Oklahoma 3 Lat. Long. Primary property access point 37.611900 -118.872700 Road 34.677423 35.058633 38.525000 -86.323447 -83.445144 -76.525833 38.800000 25.468206 36.739484 -109.270000 -80.853276 -88.154249 30.744800 -95.471500 Road 33.631261 -111.890227 Road 42.366200 22.219930 49 -85.356300 -159.5765763 Road Road 37.266666 -89.450000 Road Road Road Road/trails Road Road/boat/helicopter Road 42.722128 -70.847136 Boat 15 Illinois Department of Natural Resources (managed by SIUC) Town of Ipswich Conservation US Forest Service 40.800000 -111.780000 Road 10 14 14 11 Fort Hays State University Grayhawk Nature Center Tonto National Forest Army Corps of Engineers 39.070000 31.625833 33.694100 33.982240 -99.115000 -110.173889 -111.541000 -96.432000 Road Road Road Road/trails/boat 10 Biological Station Upper Snake River Williston Research Extension Center 12 9 and University of Oklahoma Commonwealth of Kentucky/TVA North Dakota State University 43.658300 -110.711300 Road/boat 48.160000 -103.630000 Road IV. Measurements and Resources IV.1 Key ecosystem-level processes will be measured at the inflow and outflow of each experimental reach. This two-station approach is required to account for transport of materials and to assess the importance of in-stream processing (Alexander et al. 2000, Bernhardt et al. 2005, Darracq and Destouni 2005, Wollheim et al. 2006). We will thus require 2 full aquatic sensor packages for all sites (60 packages) and 1 Biodiversity sentinel unit per site. Ten of our sites have been proposed as core wildland sites, so given the allotment of one aquatic sensor package per wildland site, we will require 10 more sensor packages. We will need an additional 40 sensors to instrument each of 20 gradient sites. The original ISEP specified only one set of aquatic sensors per stream site, but this does not allow separation of terrestrial and in-stream ecosystem processes. We thus recommend allocation of sensor packages to provide maximum ecological information. IV.2 Ecosystem functions to be measured include stream metabolism (ecosystem productivity and respiration), secondary productivity, nutrient retention and cycling (uptake, denitrification), and decomposition rates. To help interpret why these ecological functions vary over among sites, or within a site though time, we will track several structural response variables such as species composition and diversity of algae, macrophytes, macroinvertebrates, and vertebrates, as well as food web structure. We will use standard core biodiversity measurements as outlined in the ISEP, with more intensive sampling where necessary as noted below. More frequent measurements will be required to assess resilience to flood and drought, and to establish secondary production of aquatic insects. Contemporary methods (e.g., stable isotopes coupled with gut analyses) will be used to trace food webs and ecosystem process rates. Food web structure will be established by sampling natural abundance of C and N stable isotopes, with additional isotopes (sulfur, oxygen) where required. Table 1. Independent and Dependent Variables to be Assessed Using Gradients Independent Variables across Gradients Climate – temperature, precipitation (mean, variance) Nutrient deposition and loading Extreme events (magnitude, frequency of flood and drought) Geomorphological context Biological context (community composition) Temperature Elevation Dependent Variables (level and resilience*) Nutrient processing (N, P) Decomposition Respiratory metabolism and ecosystem production Secondary production (inverts, fish) Native and non-native species diversity Food web structure (stable isotope studies) *each dependent variable will be evaluated in terms of magnitude (e.g., rate of denitrification or primary production, number of native species) and resilience following flow disturbances (e.g., rate and magnitude of recovery following flow disturbances). We propose central facilities for measurements of water chemistry, isotope analyses, and macroinvertebrate and algal diversity so quality control and quality assurance can be maintained. These could be at a national NEON facility or housed in laboratories of experts who would 11 oversee the individual facilities. Jan Stevenson at Michigan State University is willing to supervise algal taxonomy, Matt Whiles at Southern Illinois University Carbondale is willing to manage a macroinvertebrate diversity facility and Walter Dodds at Kansas State University is willing to oversee water chemistry and isotope analyses. Each observational site reach will also require some measurements not in the ISEP. Dissolved gas measurements are necessary to allow for calculation of denitrification rates (dissolved N2) as well as reaeration and production rates of greenhouse gasses (N2O, methane, CO2). Total nutrient concentrations are needed to estimate ecosystem transport, retention, and cycling. Natural abundance of stable isotopes in chemical fractions is required to establish differences in biogeochemical cycling pathways. Stable isotope abundance in organisms and food sources will allow for quantification of food web structure (e.g. path strengths in food webs, not just linkages) and movement of nutrients into the biota under the different observational conditions. IV.2a,b,c,d Measurements to be performed currently specified in the Integrated Science and Education Plan. Measurement Spatial Distribution Water level in reach and nearby groundwater Dissolved organic carbon concentration Bottom of each reach Nutrient concentrations: NO3 Sensor Riparian groundwater levels Conductivity Turbidity Chlorophyll Surface PAR and UV Automated water sample collection for additional chemical profiles (dissolved and particulate N , P, and C) Dissolved oxygen Temperature pH Sampling Frequency Direct or Aggregate Every 10 minutes Daily Aggregate mean daily plus minimum and maximum Direct Top and bottom of each reach In groundwater wells Daily Top and bottom of each reach Top and bottom of each reach Top and bottom of each reach Middle of each reach Hourly Aggregate mean daily plus minimum and maximum Aggregate to mean monthly plus minimum and maximum Aggregate mean daily plus minimum and maximum Aggregate mean daily plus minimum and maximum Aggregate mean daily plus minimum and maximum Aggregate mean daily plus minimum and maximum Aggregate flow weighted daily Top and bottom of each reach Weekly Hourly Hourly Hourly Top and bottom of each reach Hourly Top and bottom of each reach Top and bottom of each reach Top and bottom of each reach Hourly Hourly Hourly Aggregate mean daily plus minimum and maximum Aggregate mean daily plus minimum and maximum Aggregate mean daily plus minimum and maximum 12 IV.3 Remote sensing needs Streams and wetlands are the vital interface between terrestrial and aquatic habitat, and as such trends in land use/ land cover in the watershed above each observational point will be a key explanatory variable for ecological processes, as will more detailed information on riparian vegetation characteristics. Remote sensing can serve two different purposes relative to our stream observations. First, observations at observational sites will be influenced by changes in watershed land use and cover. We propose to use Landsat NLCD data to characterize catchment cover for each observational site. Additionally, we posit that riparian vegetation can dictate light availability for aquatic primary production, provides a key energy source to stream food webs, and will respond to longterm fertilization. Vegetation greenness, LAI, above-ground biomass, and canopy density are variables of interest that could be sensed remotely. We therefore request a subset of the remote sensing coverage associated with the “Continental Prime Package” outlined in the document “Remote Sensing and Spatial Data Acquisition for the NEON Network and Integrated Thematic Gradient Studies”. Our specific request appears in the Table below. These data are requested for permanent transects oriented along and upstream of each observational stream reach. In many cases the watershed remote sensing will also serve for other NEON purposes and has likely been proposed for terrestrial monitoring of core and gradient sites. Sensor Type Resolution Spectral Spatial Temporal Spatial Extent Landsat5 or alternative 400-2500nm 5 Bands 30m 1/year Drainage Basin Hyperspectral Imager 400-3000nm 2m 2 times/growing season 1km 0.5m 1/year (peak growth) 1km No. Bands: 200-350 Full Waveform Lidar (flown with VNIR imager or camera) NIR, 1 band Image Processing Level Most Important Variable/Meas. OrthoGeoregistered Radiance Standard products OrthoGeoregistered Radiance Surface Reflectance Standard products NLCD Land Cover OrthoGeoregistered Calibrated Elevation 3-d data cubes Biomass LAI Tree density 3-d land cover (topography of ground and canopy) Aboveground biomass Tree density Leaf area density Vegetation species maps % cover, LAI , fPAR Land cover classes Species/community maps BGC states (pigments, water content, dry plant matter; soil minerals, clay, organic matter) 13 IV.4. Additional measurements not currently included in the NEON designs acquired using manual means. Measurement Type Post-Processing Skill Level Stream geomorphology Isotope natural abundance in water Isotope natural abundance in biomass compartments Biomass of compartments In situ Grab Data entry Extensive chemical Grab Dry, grind, weight Field tech BS chemistry Lab tech Grab Dry, grind, weight Lab tech Dissolved and particulate N, P and C Benthic chlorophyll Grab Digest, autoanalyze Grab Collect and extract BS chemistry Lab tech Reaeration rates using SF6 tracer gas release grab Trace gas flux (diffusive evasion of CO2, CH4, N2O) grab N2 flux (15N tracer studies) Grab Nutrient limitation bioassays In situ incubation Leaf decomposition rate Algae In situ incubation Grab Extract gas from water, send to central lab to analyze gas on GC Extract gas from water, send to central lab to analyze gas on GC Extract gas from water, send to central lab to analyze gas on MIMS Measure metabolic rates of substrata, analyze for chlorophyll Incubate leaf packs, weigh before and after Lab ID Macroinvertebrates Grab Lab ID Fish Grab Field ID and release Spatial Distribution Sampling Frequency Direct or Aggregate All of site 1 sample Once after every major flood from daily combined water sample Direct Aggregate Combined across reach Combined across reach Combined across reach Combined across reach Combined across reach Seasonal (every 4 months) Direct Seasonal (every 4 months) Direct From daily combined water sample Aggregate Monthly plus every 3 days after a disturbance Over a range of discharges for each site, redone after major floods Direct Field tech Combined across reach Monthly plus every 3 days after a disturbance Direct Field tech Combined across reach Monthly plus every 3 days after a disturbance Direct Field tech/ lab tech 1 set each reach Once per site per season Direct Field tech Triplicate each reach Direct Field tech/ systematic expert Field tech/ systematic expert Field tech Combined across reach Every fall using on replicate riparian leaves and “standard” leaves Seasonal (every 4 months), and more frequently after disturbance Combined across reach Seasonal (every 4 months), and more frequently for secondary production Direct Combined across reach Seasonal (every 4 months), and more frequently after disturbance Direct Field tech Aggregate Direct 14 Budget Estimates for additional measurements These estimates are for first year costs. We require 60 aquatic sensor units from the ISEP standard aquatic sensor package for observational sites (2 per site). We have not estimated fringe benefit rates for any salaries, nor have we estimated overhead rates. We suggest that salaries and operating costs should increase by 5% per year. The NSF budget pages at the end of this proposal combine operation and build costs in year 1, and yearly operation costs in the second page. One time costs, overhead not included Item OI Flowsolution IV Nutrient autoanalyzer IC with nutrient regenerator Millipore SuperQ Water purification system Shimadzu TOV-V Combustion analyzer SpeX Certiprep 8000 mill Cahn C-35 microbalance Metler Toledo analytical balance Metler Toledo Pan balance Thelco Precision Drying oven Thermolyne Muffle furnace Thermo Electron IRMS Delta V MS-200 Membrane Inlet Mass Spectrometer Varian CP3800 gas chromatograph Compound microscope/ image analysis system Dissecting scope/ image analysis Dissecting scopes M11 Ultraclave steam sterilizer Turner Fluorometer aquaflour Pipettes Computers Site preperation Power (solar or extensions) Sampling gear Innova 2350 shaker table Use cost per # needed cost analyze dissolved nutrients analyze nitrate and phosphate 70000 45000 1 1 $70,000 $45,000 provide water for nutrient lab 13000 1 $13,000 analyze dissolved carbon mill solid samples for isotope analysis weigh solid samples Reagent preparation weigh fertilizer, field samples for biomass Process biomass samples dissolved carbon sampling gear/ ash free dry mass Mass spec natural abundance of dissolved and particulate materials Analyze dissolved N2 concentration analyze dissolved gasses 40000 1 $40,000 6000 16000 3500 1 1 1 $6,000 $16,000 $3,500 2500 2718 29 29 $72,500 $78,822 4000 29 $116,000 2000000 1 $2,000,000 75000 70000 1 1 $75,000 $70,000 25000 1 $25,000 15000 1500 4000 2500 1 5 1 29 $15,000 $7,500 $4,000 $72,500 1000 2500 5000 29 29 29 $29,000 $72,500 $145,000 5000 1000 29 29 $145,000 $29,000 7000 29 $203,000 $3,353,322 15000 29 $435,000 Algal identification Macroinvertebrate identification Macroinvertebrate picking Digestion Chlorophyll, rhodamine calibration standard preparation data storage/ download Site and secure equipment variable across sites, averaged here Nets, seines, corers dissolved nitrogen isotope chemistry Annual costs, upkeep, materials and supplies overhead not included materials, supplies, shipping, upkeep, probe replacement Individual sites 15 Individual sites Algal identification facility Macroinvertebrate facility Water chemistry facility Isotope analysis facility total travel (to site, to annual meetings) materials, supplies, upkeep materials, supplies, upkeep materials, supplies, upkeep materials, supplies, upkeep Annual personnel needs: note fringe rates not included Full time, doctoral level scientist Project Director Data managers full time data managers Education coordinator full time Individual sites field tech half time Individual sites Lab tech half time Algal identification facility Taxonomist Algal identification facility lab tech Macroinvertebrate facility Taxonomist Macroinvertebrate facility lab tech Water chemistry facility Analyst Water chemistry facility lab tech Isotope analysis facility Analyst Isotope analysis facility lab tech 2000 4000 3000 5000 7000 29 1 1 1 1 $58,000 $4,000 $3,000 $5,000 $7,000 $512,000 70000 50000 40000 15000 15000 40000 30000 40000 30000 40000 30000 50000 30000 1 1 1 29 29 1 1 1 1 1 1 1 1 $70,000 $50,000 $40,000 $435,000 $435,000 $40,000 $30,000 $40,000 $30,000 $40,000 $30,000 $50,000 $30,000 $1,320,000 IV.5. Cyberinfrastructure required We will require standard database assistance. If individual laboratories are sited away from NEON, they will need the help of a data manager to set up the laboratories to ensure the data-stream capture and archiving are appropriate and consistent with NEON protocols. We will model our cyberinfrastructure and data repositories after NSF’s LTER program in which all data is summarized and made public in a web-accessible format within 3 years of collection. We will use EML format for our data. IV.6 Additional Resources, Administration and Review The observational network will create vital infrastructure for future experiments that could examine microbial biodiversity, cycling of minor elements, stoichiometric analyses, effects of invasive species, efforts to scale to larger watersheds (e.g. by linking to USGS sites or future CUAHSI sites), and other human stressors on freshwaters. This ecological observatory network will complement emerging networks of water bodies that focus on physical and chemical properties (i.e., EPA-WATERS), and existing networks of long-term ecological studies that have used a variety of methods and site selection protocols (i.e., LTER, USGS hydrologic benchmark stations). Managing this infrastructure will require substantial planning and an effective administrative structure. It will also require travel support from NEON to bring together the administrative team. We will pattern our administrative and experimental planning after the cross-site LINX I and LINX II models, which represent a highly successful long-term collaboration among a large group of stream ecologists. LINX has been a continental-scale effort that has coordinated, complex experiments entailing whole-ecosystem stable isotope additions to streams. This group has published numerous papers in high-profile journals. The original LINX I project ran from 16 September 1996 through August 2001 and resulted in 26 publications, 7 theses and dissertations, and 69 presentations. The LINX II project started in 2001 and generated 14 peer reviewed publications as of 2005. Thirteen synthetic manuscripts are now being prepared. Our group will include prior LINX participants, but also expand to include other sites and investigators. In the first year we will have three, two-day workshops to finalize protocols and plans and start pre-sampling. At this point we will also establish publication policies. We will meet annually to review progress of the experiment to assess the possibility of unexpected interactions resulting from the treatments. This will allow for interpretation of results and possibilities for resiting any experiments or changes in protocols considering that replicates occur across the continent. We will establish an executive committee that makes decisions on hiring, and more importantly on the planning of auxiliary experiments that occur at our sites. This long-term experiment will provide very strong infrastructure and we anticipate numerous requests to perform complementary experiments using the extensive background data and manipulations. We will hire a doctoral-level scientific project coordinator to deal with day-to-day decisions on scientific direction. The executive committee will oversee the project coordinator. We will also require laboratory personnel for core analytical facilities, water chemistry, isotope analyses, algal taxonomy, macroinvertebrate taxonomy. We have developed this response to RFI in conjunction with Consortium for Connectivity at Continental Scales. Many of our sites match the location of their sites. We are addressing key issues of connectivity at continental scales, explicitly how terrestrial systems connect to aquatic ecosystem as streams are one of the dominant routes of material transport on all but the most xeric landscapes. The stream sites will monitor watersheds that are of similar area to the footprints of the proposed terrestrial sensor systems. We note that a separate response to the RFI proposes a continental-scale network of instrumented lakes and reservoirs (GLEON). Like streams, lakes and reservoirs are sensitive to changes in climate, landuse, and biotic structure. We view our proposed network as complementary to the lake network yet able to examine a different set of questions. Some of the central laboratory analytical facilities would be similar across the networks, and should both networks be supported we would expect to combine facilities wherever possible to make resource use rates the most efficient. V. Education and Outreach V.1 Streams are naturally appealing ecosystems for education and outreach. It is our experience that many K-12 science programs use streams in their environmental education programs. These programs include stream-teams that are often funded by the state or local conservation organizations. A number of the scientists involved in this proposal have helped develop such programs in the past. Stream teams are composed of members of the general public as well as students. The research proposed here would provide a point of comparison for these local groups and school programs. We would also attempt to coordinate our network with the EPA Surf your Watershed outreach initiative. A number of our proposed sites have NSF Schoolyard LTER projects and we will model our education/outreach on this program (see http://schoolyard.lternet.edu/). These sites make heavy use of Internet data sets that can be accessed by students remotely. An example would be a student who visits one of our observational sites, makes auxiliary measurements, then goes online to compare the results to similar results from other observational sites. The strength of 17 our observational network is that is dispersed across the continent, affording students the ability to access local data and to put their data in the context of results obtained from other parts of the country. We will require funding for an educational coordinator, presumably housed in the NEON educational center, to foster interaction with K-12 educators and other sectors of the public. The educational facilitator will encourage applications of our data in education and outreach and also help create programs in locations that do not have a schoolyard LTER or comparable effort (obtaining funding for such programs will be incumbent upon individual sites). Each of the observational sites will provide valuable infrastructure for individual research programs. Thus the sites will provide infrastructure for undergraduate (many of our sites are REU site research areas or have other undergraduate participation programs) and graduate students. The network will assist the students in meeting scientists from a wide array of sites that are working on related projects, and provide opportunities for cross site research. V.2 Most of the institutions involved have programs to stimulate research by underrepresented groups at graduate and undergraduate levels. The educational coordinator will also help link these groups across institutions. The educational coordinator will create a web site that has opportunities for support for students from underrepresented groups across the network. This will be the first nation-wide network to provide information on research and support for students interested in stream ecosystems. 18 References Alexander, R. B., R. A. Smith and G. E. Schwarz. 2000. 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NSF-Funded PRINCIPAL INVESTIGATOR/PROJECT DIRECTOR Walter Dodds A. SENIOR PERSONNEL: PI/PD, Co-PIs, Faculty and Other Senior Associates List each separately with name and title. (A.7. Show number in brackets) Person-months CAL ACAD SUMR 1. Program coordinator 12 2. 3. 4. 5. 6. ( ) OTHERS (LIST INDIVIDUALLY ON BUDGET EXPLANATION PAGE) 7. ( ) TOTAL SENIOR PERSONNEL (1-6) B. OTHER PERSONNEL (SHOW NUMBERS IN BRACKETS) 1. ( ) POSTDOCTORAL ASSOCIATES 2. (40) OTHER PROFESSIONALS (TECHNICIAN, PROGRAMMER, ETC.) 12 3. ( ) GRADUATE STUDENTS 4. ( ) UNDERGRADUATE STUDENTS 5. ( ) SECRETARIAL - CLERICAL (IF CHARGED DIRECTLY) 6. ( ) OTHER TOTAL SALARIES AND WAGES (A + B) C. FRINGE BENEFITS (IF CHARGED AS DIRECT COSTS) assume 35% TOTAL SALARIES, WAGES AND FRINGE BENEFITS (A + B + C) D. EQUIPMENT (LIST ITEM AND DOLLAR AMOUNT FOR EACH ITEM EXCEEDING $5,000.) Granted Funds Funds Requested By Granted by NSF Proposer (If Different) $70000 $ 1280000 1350000 472500 1825000 Detail in response, does not include sensor packages or biodiversity sampling TOTAL EQUIPMENT E. TRAVEL 1. DOMESTIC (INCL. CANADA, MEXICO AND U.S. POSSESSIONS) 2. FOREIGN F. PARTICIPANT SUPPORT 1. STIPENDS $ 2. TRAVEL 3. SUBSISTENCE 4. OTHER TOTAL NUMBER OF PARTICIPANTS ( ) G. OTHER DIRECT COSTS 1. MATERIALS AND SUPPLIES 2. PUBLICATION/DOCUMENTATION/DISSEMINATION 3. CONSULTANT SERVICES 4. COMPUTER SERVICES 5. SUBAWARDS 3158000 60000 TOTAL PARTICIPANT COSTS 1302322 6. OTHER TOTAL OTHER DIRECT COSTS H. TOTAL DIRECT COSTS (A THROUGH G) I. INDIRECT COSTS (F&A) (SPECIFY RATE AND BASE) 6342822 unknown TOTAL INDIRECT COSTS (F&A) J. TOTAL DIRECT AND INDIRECT COSTS (H + I) K. RESIDUAL FUNDS (IF FOR FURTHER SUPPORT OF CURRENT PROJECT SEE GPG II.D.7.j.) L. AMOUNT OF THIS REQUEST (J) OR (J MINUS K) $ $ M. COST SHARING: PROPOSED LEVEL $ PI/PD TYPED NAME AND SIGNATURE* AGREED LEVEL IF DIFFERENT: $ DATE FOR NSF USE ONLY ORG. REP. TYPED NAME & SIGNATURE* DATE NSF Form 1030 (10/99) Supersedes All Previous Editions *SIGNATURES REQUIRED ONLY FOR REVISED BUDGET (GPG III.C) INDIRECT COST RATE VERIFICATION Date Checked Date of Rate Sheet Initials-ORG FOR NSF USE ONLY 54 Annual costs SUMMARY PROPOSAL BUDGET ORGANIZATION PROPOSAL NO. DURATION (MONTHS) STREON Stream Observational Network Proposed PRINCIPAL INVESTIGATOR/PROJECT DIRECTOR Granted AWARD NO. Walter Dodds A. SENIOR PERSONNEL: PI/PD, Co-PIs, Faculty and Other Senior Associates NSF-Funded List each separately with name and title. (A.7. Show number in brackets) Person-months CAL ACAD SUMR 1. Program coordinator 12 2. 3. 4. 5. 6. ( ) OTHERS (LIST INDIVIDUALLY ON BUDGET EXPLANATION PAGE) 7. ( ) TOTAL SENIOR PERSONNEL (1-6) B. OTHER PERSONNEL (SHOW NUMBERS IN BRACKETS) 1. ( ) POSTDOCTORAL ASSOCIATES 2. (40) OTHER PROFESSIONALS (TECHNICIAN, PROGRAMMER, ETC.) 12 3. ( ) GRADUATE STUDENTS 4. ( ) UNDERGRADUATE STUDENTS 5. ( ) SECRETARIAL - CLERICAL (IF CHARGED DIRECTLY) 6. ( ) OTHER TOTAL SALARIES AND WAGES (A + B) C. FRINGE BENEFITS (IF CHARGED AS DIRECT COSTS) assume 35% TOTAL SALARIES, WAGES AND FRINGE BENEFITS (A + B + C) D. EQUIPMENT (LIST ITEM AND DOLLAR AMOUNT FOR EACH ITEM EXCEEDING $5,000.) Funds Funds Requested By Granted by NSF Proposer (If Different) $70000 $ 1280000 1350000 472500 1822500 Detail in response, does not include sensor packages or biodiversity sampling TOTAL EQUIPMENT E. TRAVEL 1. DOMESTIC (INCL. CANADA, MEXICO AND U.S. POSSESSIONS) 2. FOREIGN F. PARTICIPANT SUPPORT 1. STIPENDS $ 2. TRAVEL 3. SUBSISTENCE 4. OTHER TOTAL NUMBER OF PARTICIPANTS ( ) G. OTHER DIRECT COSTS 1. MATERIALS AND SUPPLIES 2. PUBLICATION/DOCUMENTATION/DISSEMINATION 3. CONSULTANT SERVICES 4. COMPUTER SERVICES 5. SUBAWARDS 60000 TOTAL PARTICIPANT COSTS 469000 6. OTHER TOTAL OTHER DIRECT COSTS H. TOTAL DIRECT COSTS (A THROUGH G) I. INDIRECT COSTS (F&A) (SPECIFY RATE AND BASE) 23515000 unknown TOTAL INDIRECT COSTS (F&A) J. TOTAL DIRECT AND INDIRECT COSTS (H + I) K. RESIDUAL FUNDS (IF FOR FURTHER SUPPORT OF CURRENT PROJECT SEE GPG II.D.7.j.) L. AMOUNT OF THIS REQUEST (J) OR (J MINUS K) $ $ M. COST SHARING: PROPOSED LEVEL $ PI/PD TYPED NAME AND SIGNATURE* AGREED LEVEL IF DIFFERENT: $ DATE FOR NSF USE ONLY ORG. REP. TYPED NAME & SIGNATURE* DATE NSF Form 1030 (10/99) Supersedes All Previous Editions *SIGNATURES REQUIRED ONLY FOR REVISED BUDGET (GPG III.C) INDIRECT COST RATE VERIFICATION Date Checked Date of Rate Sheet Initials-ORG