ABSTRACT BOOK
Contents:
Wednesday Presentations…………………………………………..……………………….……… 2 - 7
Thursday Presentations …………………………………………..……………….……………… 8 - 13
Friday Presentations ………………………………...…………………………………………… 14 - 19
Saturday Presentations ………………………………………………………..………………… 20 - 25
Poster Session 1 Presentations ……………………………………………...…………………… 26 - 31
Poster Session 2 Presentations ………………………………………………………………...… 31 - 36
Abstracts (listed alphabetically by author) …………………………………………………… 37 - 359
1
and two frequency traits (low and peak vocalizing frequencies)
in 144 species woodpeckers representing more than 90% of all
genera and all the current recognized clades within this bird
family. Although we could not correct for phylogenetic effects,
we provide support for a general negative relationship of body
mass vs. frequency. Low frequency was better adjusted to the
inverse relationship with body mass. With some exceptions, the
species here examined used a wide spectrum of frequencies, and
despite the diversity of type of songs/call, the basic structure
was seems to be relatively homogeneous across the group. We
discuss the possible causes of this negative relationship in this
cosmopolitan avian clade.
size with species in the large-size clade. The data also suggest
morphological convergence among the species C. fuscus, C.
albiventris and C. albidiventris, three species formerly
considered to be conspecific. Our study uses carbon (δ13C) and
nitrogen (δ15N) isotopes as indicators of reliance on marine and
terrestrial resources, and deuterium (δD) and oxygen (δ18O)
isotopes to assess patterns of elevational residence and
movement. Our approach is novel in that we 1) characterize the
ecological habits of each species using stable isotope analysis, 2)
describe morphological variation in the genus, and 3) track the
evolution of ecology and morphology, and link them by
mapping them along the branches of a well-resolved
phylogenetic tree. To our knowledge, this project is the first to
employ stable isotope analysis as a covariate for morphological
study, and to document variation in δD and δ18O compositions
in animal tissues along an elevational gradient.
PS2.127 Quiroga, Mónica, (Universidad Nacional Autonoma
de México, México, Mexico);
NECTAR PRODUCTION OF SALVIA IODANTHA VISITED
BY HUMMINGBIRDS AND NECTAR ROBBERS
DIGLOSSA
BARITULA
AND
OREOTHLYPIS
RUFICAPILLA IN THE MOUNTAINS OF MANANTLÁN,
JALISCO.
Many flowers produce nectar, as a reward to their pollinators.
Some animals use this resource even when they do not pollinate
the plants and they are called nectar robbers. Nectar robbers
have developed various strategies to evade these restrictions
imposed by plants, causing floral damages that can decrease the
amount of nectar available to pollinators decreasing visitation
rate and diminishing seed production. If nectar is abundant
robbers can be commensals in the system having neither positive
nor negative effects in the system. We used nets to assess the
relative abundance of hummingbirds and nectar robbers. To
assess floral abundance and record nectar robbers visitation
quadrants, were used. Nectar produced (nectar volume and
concentration) was measured. A total of 33 individuals of the
family Trochilidae of 7 species were recorded. Selasphorus was
the most abundant of all hummingbirds. We found significant
differences in the volume and calories produced between hours
but not among treatments or in the interaction of these factors, in
both cases three groups were formed. The presence of the
robbers is low in the system, the number of flowers in this area
at this season is high, which may determine that the resource
was not limited, and this may determine the neutral status of
nectar robbers in the system. Keywords: Hummingbirds,
robbers, pollination, nectar. S. iodantha.
SAT7.2 Ralph, C John, (US Forest Service, Arcata, CA,
Canada); Wolfe, Jared (Louisiana State University, Baton
Rouge, Louisiana, United States); Elizondo, Pablo (Costa Rica
Bird Observatories, Santo Domingo de Heredia,, Costa Rica)
TROPICAL BIRDS ARE A SENSITIVE INDICATOR OF
CLIMATE CHANGE: THIRTEEN YEARS OF BIRD
BANDING AND THE INFLUENCE OF THE EL NIÑO
SOUTHERN OSCILLATION ON THE DEMOGRAPHY AND
CONDITION OF SEVERAL MIGRANT AND RESIDENT
BIRDS IN NORTHEASTERN COSTA RICA
We have found clear evidence that tropical bird demography and
physiological condition may be influenced by the synergistic
effects of forest structure and the El Niño Southern Oscillation
(ENSO). We examined the influence of ENSO on the population
growth, survival, and condition of resident species, especially
the White-collared Manakin (Manacus candei), and of five
Nearctic-Neotropic migrants during spring migration in young
and mature forests. Our results from several stations indicate
that both resident and migrant frugivores are significantly
negatively influenced by the drying effects of ENSO, with the
effect exacerbated in second-growth forests. More specifically,
we found that during dry periods associated with ENSO, the
manakin, an obligate frugivore, had lower survival and
population growth, and migrant frugivores meanwhile acquired
less weight. Conversely, all migrant insectivores either gained
mass or exhibited no pattern during these dry phases of ENSO.
We believe frugivorous species‘ sensitivity to climatic
fluctuations reflect inherent trophic cascades where dry signals
disrupt fruiting events and thus bird communities. Interactions
between climate, forest structure and avian fitness, coupled with
increased loss of mature forest and a changing climate
necessitate a deeper understanding of community persistence
across a heterogeneous landscape.
PS1.127 Rader, Jonathan, (University of Wyoming, Laramie,
United States); Newsome, Seth (University of Wyoming,
Laramie, WY, United States); Chesser, R. Terry (Smithsonian
Institution, Division of Birds, Washington, DC, United States);
Martinez del Rio, Carlos (University of Wyoming, Laramie,
WY, United States)
EXPLORING
PHENOTYPE-ENVIRONMENT
CORRELATIONS IN SOUTH AMERICAN CINCLODES
OVENBIRDS
The suboscine genus Cinclodes provides an ideal system in
which to study ecological and morphological covariation. The
15 species of Cinclodes inhabit coastal and riparian zones from
sea level to >4000 m, and some species display seasonal
elevational migration. Several species use marine resources
either seasonally or throughout the year, and have to cope with
the concomitant salt loads. These coastal Cinclodes may be the
most maritime of all passerines. Preliminary morphological data
suggest that Cinclodes species have diversified primarily in
body size. The genus is subdivided into two clades with
contrasting (and non-overlapping) body sizes, although an island
species in the small size clade seems to have converged in body
T15.4 Raphael, Martin, (USDA Forest Serve, Pacific
Northwest Research Station, Olympia, United States); Falxa,
Gary (U.S. Fish and Wildlife Service, Arcata, United States)
CONSERVATION OF THE MARBLED MURRELET IN THE
PACIFIC NORTHWEST, USA
The Marbled Murrelet (Brachyramphus marmoratus) is a small,
diving seabird in the alcid family that forages within nearshore
marine waters and nests on limbs of old coniferous trees. The
species is federally listed as Threatened in the USA in the states
of Washington, Oregon and California. As part of the regional
effectiveness monitoring program in support of the Northwest
Forest Plan, my colleagues and I have been surveying murrelets
along coastal waters from year 2000 to present. These surveys
indicate that murrelet numbers are declining at an annual rate of
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