LIST OF PUBLICATIONS ABOUT LAKE ERKEN * Articles are available in the Erken library 1940ies Skuja, H. 1940-1950. Växtplankton i Erken. Rodhe, W. * 1945-1964. Årsredogörelser för Limnologiska institutionen, Limnologiska laboratoriet vid Erken och Fältstationen på Norr Malma. Annual printed reports. Rodhe, W. * 1946. Malmenska Erkenlaboratoriet, en ny station för limnologisk fältforskning. Svensk Fisktidskrift 55: 37-42. 1950ies Rodhe, W. * 1950. Två donationer och deras betydelse. Norr Malma som centrum för limnologi och annan fältforskning. Uppsala Nya Tidning 9 febr. Pringsheim, E. G. * 1951. Haematococcus droebakensis und Stephanosphaera pluvialis am Erken-See in Schweden. Bot. Notiser 4: 83-84. Agnedal, P. O. * 1957. Fiskestatistik i sjön Erken 1952-1956. Svensk Fisktidskrift 66: 108113. Rodhe, W. 1958. Primärproduktion und Seetypen, Verh int. Verein. theor. angew. Limnol. 13: 121-141. Rodhe W. 1958. * The study of lakes. Review. Hutchinson, G.E.: A treatise on limnology. Vol. 1. New York. 1957. Ecology 39: 559- 560. Rodhe,W., Vollenweider, R. A. & Nauwerck, A. 1958. The primary production and standing crop of phytoplankton. Perspect. marine biol. 299-322. Ed BuzzatiTraversc. Univ. California. 1960ies Vollenweider, R.A. & Nauwerck, A. * 1961. Some observations on the C 14 method for measuring primary production. Verh. int. Verein. theor. angew. Limnol. 14: 134139. Ahl, T. 1962. * Nederbörds-, avdunstnings- och avrinningsförhållanden inom nederbördsområdet för Erkens västra tillopp. En preliminär utredning. Report. 16 pp. Andersson, T. * 1963. Fiskeribiologiska undersökningar med ekolod i Erken sommaren 1962. Scripta Limnologica Upsaliensia. 5 pp. Nauwerck, A. * 1963. Die Beziehungen zwischen Zooplankton und Phytoplankton im See Erken. Symb. Bot. Upsal. 17 (5): 1-163. Forsberg, C. * 1965. Environmental conditions of Swedish charophytes. Symb. Bot. Upsal. XVIII (4): 1-67. Raab, L. * 1965. Den hydrologiska mätstationen på Malmaön i sjön Erken (The hydrological station on Malmaön i Lake Erken). Naturvet. Forskr. Års bok. 18: 367-372. Milbrink, G. * 1966. Upptagning av glykos i sötvattan. En metodisk studie av HobbieWright´s C14 -biotest. Thesis for 3 points in limnology. Scripta Limnologica Upsaliensia 130. 34 pp. Wright, R. T. & Hobbie, J. E. * 1966. Use of glucose and acetate by bacteria and algae in aquatic ecosystems. Ecology 47: 447-464. Landahl, C.C. 1967. * Vattenväxternas biomassa och produktion i Erkens utloppsbäck. Thesis for 3 points in limnology. 28 pp. Segerfeldt, Å. * 1967. Kvantitativa studier av zooplanktonbeståndet i sjön Erken. Thesis for 3 points in limnology. Scipta Limnologica Upsaliensia 167. 51 pp. Allen, H. L. * 1968. Acetate in fresh water: Natural substrate concentrations determined by dilution bioassay. Ecology 49: 346-349. Anderson, T. * 1968. Undersökningar av fiskbeståndet i Erken med hjälp av ekolod och trål.Information från Sötvattenslabratoriet, Drottningholm 12: 1-23. Fries, M. * 1969. Sedimentproppar och pollendiagram från sjön Erken, östra Mellan-Sverige. Geol. För. Stockh. Förh. 9: 353-365. Sandberg, G. * 1969. A quantitative study of chironomid distribution and emergence in Lake Erken. Arch. Hydrobiol. Suppl. xxxv: 119-201. 1970ies Ekman, P. & Fries, M. * 1970. Studies of sedimental from Lake Erken, eastern central Sweden. Geol. För. Stockh. Förh. 92: 214-224. Pechlaner, R. 1970. The Phytoplankton spring outburst and its conditions in Lake Erken (Sweden). Limnol. Oceanogr. 15: 113-130. Widell, A. 1970. Närsalterna i sjön Erken sommaren 1965. Thesis for 3 points in limnology. Scripta Limnologica Upsaliensia. 24 pp. Dahlgren, M. * 1971. Studier av syrgastärning och dehydrogenasaktivitet i sjösediment. Scripta Limnologica Upsaliensia. Nyman, B. * 1971. A comparative study of the bottom fauna on different types of vegetation in Lake Erken. Thesis for 3 points in limnology. 26 pp. Andersson, E. , Mossberg, P. & Nyberg, P. * 1972. Vinterdygnsaktiviteten hos abborre, gärs, mört och nors i sjön Erken. Imformation från sötvattenlaboratoriet, Drottningholm. Scripta Limnologica Upsaliensia 296. 8 pp. Granhall, U. & Lundgren, A. 1972. Nitrogen fixation in Lake Erken. Limnol. Oceanogr. 16: 711-719. Lännergren, C. * 1972. Kvävefixering och primärproduktion i Erkens pelagial. Thesis for 3 points in limnology. Scripta Limnologica Upsaliensia 306. 31 pp. Boström, B. & Pettersson, K. * 1973. Fysikaliska och kemiska data från Erken sedan 1930talet. Thesis for 3 credits in limnology. Scripta Limnologica Upsaliensia 9: 344. 15 pp ( part B, tables of the basic data). Dottne-Lindgren, Å., * 1973. Quantitative studies of zooplankton in Lake Erken. Scripta Limnologica Upsaliensia 327. Forsberg, C. 1973. Brief report of the project and the workshop seminar at Lake Erken. Lingsten, L. * 1974. Nurients in the outled stream of Lake Erken in 1972. Thesis for 3 credits in limnology. Scripta Limnologica Upsaliensia. 10: 384. 29pp. Boström, B & Pettersson, K. 1977. The spring development of phytoplankton in Lake Erken. Freshwater Biology 7: 327-335. Håkanson, L. 1978. Erken morfometri. Scripta Limnolgica Upsaliensia 14. Scriptum 468. 23 pp. Pettersson, K. * 1979. Orthophosphate, alkaline phosphatase activity and algal surplus phosphorous in Lake Erken. Acta Universitatis Upsaliensis 505. 15 pp. Pettersson, K. * 1979. Enzymatic determination of orthophosphate in natural waters. Int. Revue ges. Hydrobiol. 64: 585-607 1980ies Lindström, K. * 1980. Peridimium cinctum bioassays of Se in Lake Erken. Arch. Hydrobiol. 89: 110-117. Pettersson, K. * 1980. Alkaline phospatase activity and algal surplus phosphorus as phosphorus-deficiency indicators in Lake Erken. Arch. Hydrobiol. 89: 54-87. Eriksson, C. * 1982. Effects of selenium and phosphorus on growth of the diatom tephanodiscus Hantzschii v. Pusillus. Report 22 from the Diatomsymposium in Lund in May 1981. Bell, R.T. 1984. Thymidine incorporation rates and bacterioplankton dynamis during early spring in Lake Erken. In : J. Overbeck et al. (Eds.), Proceedings of the second workshop on measurement of microbial activity in the carbon cycle of aquatic ecosystems. Arch. Hydrobiol. Beih. Ergebn. Limnol. 19: 81-89. Eriksson, C. and K. Pettersson. 1984. The physiolgoical status of spring phytoplankton in Lake Erken fields measurements and nutrient enrichment experiments. Verh. Internat. Verein. Limnol. 22: 743-749. Johnson, R. K. * 1985. Feeding efficiencies of Chironomous plumosus (L.) and C. anthracinus Zett. (Diptera: Chironomidae) in mesotrophic Lake Erken. Freshwater Biol. 15: 605-612. Pettersson, K. * 1985. The significance of sediment phosphorus composition for summer blooms of phytoplankton. Proc. 13th Nord Symp. On sediments, Aneboda, Sweden. Pettersson, K. 1985. The availability of phosphorus and the species composition of the spring phytoplankton in Lake Erken. Int. Revue Ges. Hydrobiol. 70: 527-546. Tirén, T. & Boström, B. * 1985. Simultaneous nitrification and denitrification in Lake Erken sediments. pp. 273- 286. In : H.L Golterman (ed.), Denitrification in the nitrogen cycle. Plenum. Hasselrot, A. T. 1986. The scraper / grazer community of the upper windexposed litoral in Lake Erken. A preliminary study. p. 175. In : Proceedings of the 3rd European Congress of Entomology. ISBN 90-71912-01-9. Johnson, R. K. * 1986. Life histories and coexistence of Chironomus plumosus (L.), C. anthracinus Zett. (Diptera: Chironomidae) and Pontotoporeia affinis Lindström (Crustacea: Amphipoda) in mesotropic Lake Erken. Acta Universitatis Upsaliensis 37. 20 pp. Johnson, R. K. 1986. The life history, production and food habits of Pontoporeia affinis Lindström (Crustacea: Amphipoda) in mesotrophic Lake Erken. Hydrobiologia 144: 277-283. Johnson, R. K. * 1987. The life hisory, production and food habits of Pontoporeia affinis Lindström (Crustacea: Amphipoda) in mesotrophic Lake Erken. Hydrobiologia 144: 277-283. Johnson, R. K. * 1987. Seasonal varition in diet of Chironomus plumosus. (Diptera: Chironomidae) in mesotrophic Lake Erken. Freshw. Biol. 17: 525-532. Johnson, R. K. & Pejler, B. * 1987. Life histories and coexistence of the two profundal Chironomus species in Lake Erken. Ent. Scand., Suppl. 29: 233-238. Pettersson, K. & Boström, B. 1987. Batch experiments on the impact of physical and chemical factors on denitrification and phosphorus release from sediments. 8th Nordic symposium on sediments. Editors: F. Ö. Andersen, L. Kofoed and E. Lastein. Salten Skov Laboratory, Denmark pp. 92-106. ISBN 87-87766-078. Barten, I. 1988. Onderzoek naar de studerende betekenis van Fosfat-liminatie en Fotoinihibitie op de Specifieke Fotosynthese-snelheid van Fytoplankton in Erken. Onderzoek naar de bijbrage van Visteelaktiviteiten in de Eutrofiering. Pierson, D. C. 1989. The importance of phytoplankton photoadaptation in influencing estimates of integral photosynthesis. Nordic Hydrol. 20: 53-72 Eriksson, C. & Pedros-Alio, C. * 1990. Selenium as a nutrient for freshwater bacterioplankton and its interactions with phosphorus. Can. J. Microbiol. 36: 475-483. 1990ies Istvanovics, V., Pettersson, K. & Pierson, D. C. * 1990. Partitioning of phosphate uptake between different size groups of planktonic microorganisms in Lake Erken. Verh. Internat. Verein. Limnol. 24: 231-235. Olsson, H. * 1990. Phosphatase activity in relation to phytoplankton composition and pH in Swedish lakes. Freshwater Biology 23: 353-362. Pettersson, K. * 1990. The spring development of phytoplankton in Lake Erken: species composition, biomass, primary production and nutrient conditions - a review. Hydrobiologia 1991: 9-14. Pettersson, K., Istanovics, V. & Pierson, D. C. * 1990. Effects of vertical mixing on phytoplankton phosphorus supply during summer in Lake Erken. Verh. Internat. Verein. Limnol. 24: 236-241. Pierson, D. C. 1990. Effects of vertical mixing on phytoplankton photosynthesis and phosphorus deficiency. Ph.D. Thesis. Uppsala University, Department of Physical Georgraphy, Division of Hydrology. Report Series A No. 51. Eriksson, C. & Forsberg, C. * 1992. Nutrient interactions and phytoplankton growth during the spring bloom period in Lake Erken, Sweden. Int. Revue ges. Hydrobiol. 77: 517-551. Istvanovics, V., Pettersson, K, Pierson, D. C. & Bell, R. T. * 1992. Evaluation of phosphorous deficiency indicators for summer phytoplankton in Lake Erken. Limnol. Oceanogr. 37: 890-900. Lindström, * 1992. Ceratium in Lake Erken: Vertical distribution, migration and form variation. Nord. J. Bot.12: 541-556. Pierson, D. C., Pettersson, K. & Istvanovics, V. * 1992. Temporal changes in biomass specific photosynthesis during the summer: regulation by environemntal factors and the importance of phytoplankton succession. Hydrobiologia 243/244: 119135. Sundh, I. * 1992. Biochemical composition of dissolved organic carbon derived from phytoplankton and used by heterotrophic bacteria. Applied and Environmental Microbiology 58: 2938-2947. Sundh, I. * 1992. Biochemical composition of dissolved organic carbon released from natural communities of lake phytoplankton. Arch Hydrobiol. 125: 347-369. Söderbäck, B. * 1992. Predator avoidance and vulnerability of two co-occurring crayfish species, Astacus astacus (L.) and Pacifastacus leniusculus (Dana). Ann. Zool. Fennici 29: 253-259. Colom, W., Pierson, D. C. & Rodrigo, M. A. 1993. The influence of photoinhibition and algal composition vertical variations in chlorophyll a specific photosyntesis. Eckerrot, Å & Pettersson, K. 1993. Pore water phosphorus and iron concentrations in a shallow, eutrophic lake - indications of bacterial regulation. Hydrobiologia 253: 165-177. Forsell, L. * 1993. Some aspects of the migration and distribution of the cyanobacteria Gloetrichia echinulata. Nordic Sediment Symposium. Goedkoop, W. * 1993. Benthic response to a spring diatom sedimentation event in mesotrophic Lake Erken.Verh. Internat. Verein. Limnol. 25: 518 (extended abstract). Hasselrot, A. * 1993. Insight into a psychomyid Life. Acta Universitatis Upsaliensis. Istvanovics, V., Pettersson, K., Rodrigo, M, Pierson, D. C., Padisak, J. & Colom, W. * 1993. Gloeotrichia echinulata, a colonial cyanobacterium with a unique phosphorus uptake and life strategy. Journal of Plankton Research 15: 531-552. Kann, E. 1993. The littoral algal biocoenoses of Lake Erken and its outlet (Uppland, Sweden). Arch. Hydrobio 91-112. Nyvall, P. 1993. Influence of nitrogen additions on phytoplankton composition in mesotrophic Lake Erken: A pilot study with evaluation of methods. Scripta Limnologica Upsaliensia. B:5. Pettersson, K. * 1993. Lake resoration-from dredging to biomanipulation. Proceedings of the ILEC/UNEP International Training Course held in Tihany, Hungary, 11-23 October. Pettersson, K., Bell, R. T., Istvanovics, V., Padisak, J. & Pierson, D. C. * 1993. Phosphorous status of size-fractionated seston in Lake Erken. Verh. Internat. Verein. Limnol. 25: 137-143. Pettersson, K., Herlitz, E. & Istvanovics, V. * 1993. The role of Gloeotrichia echinulata in the transfer of phosphorus from sediments to water in Lake Erken. Hydrobiol. 128: 175-186. Waara, K.-O., Bell, R. T. & Pettersson, K. * 1993. Assessing the impact of copper on DNA and protein synthesis of lake bacterioplankton assemblages. Arch. Hydrobiol. 128: 175-186. Blomqvist, P., Pettersson, A. & Hyenstrand, P. 1994. Ammonium-nitrogen - a key regulatory factor causing dominance of non-nitrogen-fixing cyanobacteria in aquatic systems. Arch. Hydrobio. 132: 141-164. Istvanovics, V., Padisak, J., Pettersson, K. & Pierson, D. C. * 1994. Growth and phosphorus uptake of summer phytoplankton in Lake Erken (Sweden). J. Plankton Res. 16: 1167-1196. Pierson, D. C., Colom, W, & Rodrigo, M. A. 1994. The influence of photoinhibition and algal size on vertical variations in chlorophyll - a specific photosynthesis. Arch. Hydrobiol. 3: 293-309. Pierson, D. C. & Weyhenmeyer, G. A. * 1994. High resolution measurements of sediment resuspension above an accumulation bottom in a stratified lake. Hydrobiologia. 284: 43-57. Forsell, L. & Pettersson, K. 1995. On the seasonal migration of the cyanobacterium Gloeotrichia echinulata in Lake Erken, Sweden, and its influence on the pelagic system. Mar. Freshwater Res. 46: 287-293. Pettersson, K., L. Forsell and A.T. Hasselrot. * 1995. Horizontal distribution patterns during a cyanobacterial bloom. Wat. Sci. Tec. 32: 139-142. Weyhenmeyer, G. A., Meili, M. & Pierson, D. C. * 1995. A simple method to quantify sources of settling particles in lakes: Resuspension versus new sedimentation of material from planktonic production. Marine and Freshwater Research 46: 223231. Goedkoop, W. & Johnson, R. K. 1996. Pelagic-benthic coupling: Profundal benthic community response to spring diatom deposition in mesotrohic Lake Erken. Limnol. Oceanogr. 41: 636-647. Goedkoop, W. & Törnblom, E. 1996. Seasonal fluctuations in benthic bacterial production and abundance in Lake Erken: the significance of major abiotic factors and sedimentation events. Arch. Hydrobiol. Erg. Limnol. 48: 197-205. Markensten, H. 1996. Lipid- and elemental content in food particles, following spring bloom deposition in Lake Erken, and the effect on lipid dynamics in chironomid larvae. Scripta Limnologica Upsaliensia B:13, 19 pp. (Thesis). Weyhenmeyer, G. A. * 1996. The influence of stratification on the amount and distribution of different settling particles in Lake Erken. Can. J. Fish. Aquat. Sci. 53: 12541262. Weyhenmeyer, G. A. * 1996. The significance of sediment resuspension in lakes. Acta Universitatis Upsaliensis. 225. PhD Thesis Uppsala University. Ahlgren, G., Goedkoop, W., Markensten, H., Sonesten L., Boberg, M. 1997. Seasonal variations in food quality for pelagic and benthic invertebrates in Lake Erken - the role of fatty acids. Freshwater Biology 38: 555-570. Goedkoop, W., Gullberg, K.R., Johnson, R. K. & Ahlgren, I. 1997. Microbial response of a fresh-water benthic community to a simulated diatom sedimentation event interactive effect of benthic fauna. Microbial Ecology 34: 131-143. Gullberg, K.R., Goedkoop, W. & Johnson, R. K. 1997. The fate of diatom carbon within a freshwater benthic community - a microcosm study. Limnology and Oceanography 42: 452-460. Traunspurger, W., Bergtold, M. & Goedkoop, W. 1997. The effects of nematodes on bacterial activity and abundance in a profundal freshwater sediment. Oecologia 112: 118-122. Weyhenmeyer, G. A. * 1997. Quantification of resuspended particles in sedimentation traps. Verh. Internat. Verein. Limnol. 26: 271-276. Weyhenmeyer, G. A., Håkanson, L. & Meili, M. * 1997. A validated model for daily variations in the flux, origin and distribution of settling particles within lakes. Limnol. Oceanogr. 42: 1517-1529. Bell, R. T., Stensdotter, U., Pettersson, K., Istvanovics, V. & Pierson, D. C. * 1998. Microbial dynamics and nutrient turnover in Lake Erken, Sweden. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 1-20. Forsell, L. * 1998. Migration from the littoral zone as an inoculum for phytoplankton. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 21-27. Goedkoop, W., Sonesten, L., Markensten, H. & Ahlgren, G. 1998. Fatty acid biomarkers show diatary differences between dominant chironomid taxa in Lake Erken. Freshwater Biology 40: 135-143. Hyenstrand, P., Blomqvist, P. & Pettersson, A. * 1998. Factors determining cyanobacterial success in aquatic systems - a literature review. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 41-62. Hyenstrand, P., Nyvall, P., Pettersson, A. & Blomqvist, P. * 1998. Regulation of nonnitrogen-fixing cyanobacteria by inorganic nitrogen sources - experiments from Lake Erken. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 29-40. Isaksson, A. * 1998. Phagotrophic phtoflagellates in lakes - a literature review. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 63-90. Istvanovics, V. & Pettersson, K. * 1998. Phosphorus release in relation to composition and isotopic exchangeability of sediment phosphorus. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 91-104 Kahlert, M. * 1998. C:N:P ratios of freshwater bentic algae. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 105-114. Kisand, V. & Pettersson, K. * 1998. Induction of bacterial and algal exoenzymes in the pelagial of Lake Erken during summer. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 115-121. Reeuwijk, v. P. 1998. Primary production of benthic algae, in situ measurements in Lake Erken, Sweden. Scripta Limnologica Upsaliensia B:13. Rengefors, K. * 1998. Seasonal succession of dinoflagellates coupled to the benthic cyst dynamics in Lake Erken. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 123-141. Rodrigo, M., Pierson, D. C. & Pettersson, K. * 1998. Sinking and floating rates of natural phytoplankton assemblages in Lake Erken, Sweden. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 143-156. Rydin, E. & Brunberg, A.-K. * 1998. Seasonal dynamics of phosphorus in Lake Erken surface sediments. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 157-167. Schreiber, S., Odelström, T., Pettersson, K. & Eichelberger, D. * 1998. The zebra mussel Dreissena polymorpha (Pall.) as a food source for the signal crayfish Pacifastacus leniusculus (Dana) in Lake Erken: Laboratory experiments. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 169-176. Törnblom, E. & Pettersson, K. * 1998. Bacterial production and total sediment metabolism in profundal Lake Erken sediments. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 177-183. Törnblom, E. & Rydin, E. 1998. Bacterial and phosphorus dynamics in profundal Lake Erken sediments following the deposition of diatoms: a laboratory study. Hydrobiologia 364: 55-63. Vrede, K. Hyenstrand, P. Pettersson, A. & Blomqvist, P. * 1998. The response of heterotrophic bacterioplankton to different forms of inorganic nitrogen. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51:313-222. Weyhenmeyer, G. A. * 1998. Resuspension in lakes and its ecological impact - a review. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 185-200. Weyhenmeyer, G. A., Pettersson, K. & Padisak, J. * 1998. Quantitative relationships between planktonic biomass and organic/inorganic resuspended particulate matter. Arch. Hydrobiol. Spec. Issues Advanc. Limnol. 51: 201-212. Waara, K-O and K. Pettersson 1999: Effects of heavy metals on respiratory activity in lakes. Opuscula, Dept. of Energy, Mälardalens Högskola, 9 pp. Weyhenmeyer, G., Blenckner, T. and Pettersson, K. 1999. The Phytoplankton spring outburst related to the North Atlantic Oscillation. Limnology and Oceanography 44: 1788-1792. 2000ies Goedkoop, W. and Pettersson, K. (2000) Seasonal changes in sediment phosphorus forms in relation to sedimentation and benthic bacterial biomass in Lake Erken. Hydrobiologia 431, 41-50 Goedkoop, W.; Sonesten, L.; Ahlgren, G. and Boberg, M. (2000) Fatty acids in profundal benthic invertebrates and their major food resources in Lake Erken, Sweden: seasonal variation and trophic indications. Canadian Journal of Fisheries and Aquatic Sciences 57, 2267-2279 Hillebrand, H. and Sommer, U. (2000) Diversity of benthic microalgae in response to colonization time and eutrophication. Aquatic Botany 67, 221-236 Hillebrand, H. and Sommer, U. (2000) Effect of continuous nutrient enrichment on microalgae colonizing hard substrates. Hydrobiologia 426, 185-192 Hillebrand, H.; Worm, B. and Lotze, H.K. (2000) Marine microbenthic community structure regulated by nitrogen loading and grazing pressure. Marine ecology progress series 204, 27-38 Hyenstrand, P.; Burkert, U.; Pettersson, A. and Blomqvist, P. (2000) Competition between the green alga Scenedesmus and the cyanobacterium Synechococcus under different modes of inorganic nitrogen supply. Hydrobiologia 435, 91-98 Hyenstrand, P.; Rydin, E. and Gunnerhed, M. (2000) Response of pelagic cyanobacteria to iron additions - enclosure experiments from Lake Erken. Journal of Plankton Research 22, 6, 1113-1126 Pierson, D.C. and Strömbeck, N. (2000) A modelling approach to evaluate preliminary remote sensing algorithms: Use of water quality data from Swedish great lakes. Geophysica 36, 1-2, 177-202 Rydin, E. (2000) Potentially mobile phosphorus in Lake Erken sediment. Water Research 34, 7, 2037-2042 Szász, E. and K. Pettersson 2000. Nitrogen uptake and fixation by phytoplankton in Lake Erken (Sweden) during summer. Verh. Internat. Verein. Limnol. 27: 1995-1999. Hillebrand H., and Azovsky A. I. (2001) Body size determines the strength of the latitudinal diversity gradient. Ecography 24, 3, 251-256 Hillebrand H., Kahlert M. (2001) Effect of grazing and nutrient supply on periphyton biomass and nutrient stoichiometry in habitats of different productivity. Limnology and Oceanography 46 (8): 1881-1898 Hillebrand H., Watermann F., Karez R., Berninger U.-G., Watermann F., Karez R., Berninger, Ulrike-G. (2001) Differences in species richness patterns between unicellular and multicellular organisms. Oecologia 126 (1): 114-124 Hyenstrand, P., Rydin, E., Gunnerhed, M., Linder, J., and Blomqvist, P. (2001) Response of the cyanobacterium Gloeotrichia echinulata to iron and boron additions an experiment from Lake Erken. Freshwater Biology 46, 6, 735-741 Pettersson, K 2001: Phosphorus characteristics of settling and suspended particles in Lake Erken The Science of The Total Environment, vol. 266: 79-86. Pettersson, K. and Kahlert, M. 2001. Alkaline phosphatase activity in periphyton communities. Verh. Internat. Verein. Limnol. 27: 3898-3901 Rengefors, K., Pettersson, K., Blenckner, T and Anderson, D.M.. 2001. Species-specific alkaline phosphatase activity in freshwater spring phytoplankton: Application of a novel method. J. Plankton Res. 23: 435-443. Szász, E. and Pettersson, K. (2001) Nitrogen upptake and fixation by phytoplankton in Lake Erken (Sweden) during summer. International Association of Theoretical and Applied Limnology 27, 4, 1995-1999 Östlund, C; Flink, P ; Strömbeck, N. ; Pierson, Don and Lindell, T (2001) Mapping of the water quality of Lake Erken, Sweden, from Imaging Spectrometry and Landsat Thematic Mapper. SCIENCE OF THE TOTAL ENVIRONMENT 268, 1-3, 139154 Östlund, C.; Flink, P; Strombeck, N.(2001) Mapping of the water quality of Lake Erken, Sweden, from Imaging Spectrometry and Landsat Thematic Mapper.Science of total environment 268: 171-188 Blenckner, T., Pettersson, K and J. Padisak 2002. Lake plankton as a tracer to discover climate signals. Verh. Internat. Verein. Limnol. 28: 1324-1327. Brunberg, A. - K., Blomqvist, P. & Rydin, E. (2002): Contrasting ontogeny among hardwater lakes as revealed by sediment P-fractionation. - Arch. Hydrobiol. 153: 491 - 502. Hillebrand H 2002. Diversity of unicellular aquatic organisms scaled to body size. 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