Reference Type: Journal Article Record Number: 113 Author
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URL: Author Address: Uppsala Univ, Dept Limnol, Evolutionary Biol Ctr, S-75236 Uppsala, Sweden. Lund Univ, Dept Ecol, S-22362 Lund, Sweden. Karlsson-Elfgren, I, Uppsala Univ, Dept Limnol, Evolutionary Biol Ctr, Norbyvagen 22, S-75236 Uppsala, Sweden. irene.karlsson@ebc.uu.se
food webs; introduced crayfish; orconectes-rusticus; functional-significance; aquatic macrophytes; ecological impact; california newts; exotic crayfish; body size; fish Abstract: Large omnivorous predators may play particularly important roles determining the structure of communities because of their broad diets and simultaneous effects on multiple trophic levels. From June 2001 to June 2002 we quantified community structure and ecosystem attributes of six newly establishing freshwater ponds (660 m(2) each) after populations of omnivorous crayfish (Orconectes virilis) were introduced to three of the ponds. Crayfish preyed heavily on fish eggs in this experiment, which reduced recruitment of young-of-year fish. This effect indirectly enhanced zooplankton biomass in crayfish ponds. Phytoplankton abundance exhibited a more complex pattern and was probably influenced by non-trophic (e.g., bioturbation) effects of crayfish. Peak dissolved oxygen levels were lower in the crayfish ponds indicating that they had lower primary production: respiration ratios. Metaphytic algae were strongly affected by crayfish presence; filamentous greens quickly disappeared and the blue-green Gleotrichia (a less preferred food item) eventually dominated the composition in crayfish ponds. Chara vulgaris and vascular macrophytes established 34% cover in control ponds by June 2002, but were not able to establish in crayfish ponds. Two important periphyton herbivores (tadpoles and gastropods) were absent or significantly reduced in the crayfish ponds, but periphyton differences were temporally variable and not easily explained by a simple trophic cascade (i.e., crayfish-snails and tadpoles-periphyton). Our results indicate that crayfish can have dramatic direct and indirect impacts on littoral pond communities via feeding links with multiple trophic levels (i.e., fish, invertebrates, and plants) and non-trophic activities (bioturbation). Although the effects of omnivorous crayfish on littoral communities can be large, their complex effects do not fit neatly into current theories about trophic interactions or freshwater community structure. Notes: Cited References: ABRAHAMSSON S, 1966, OIKOS, V17, P96 ANGELER DG, 2001, HYDROBIOLOGIA, V464, P89 AXELSSON E, 1997, AMPHIBIA-REPTILIA, V18, P217 BLACK RW, 1988, OECOLOGIA, V77, P468 BROOKS JL, 1965, SCIENCE, V150, P28 BUCK DH, 1970, B ILL NAT HIST SURV, V30, P69 BURNS CW, 1969, LIMNOL OCEANOGR, V14, P693 CARPENTER SR, 1993, TROPHIC CASCADE LAKE CHAMBERS PA, 1990, FRESHWATER BIOL, V24, P81 COLLINS NC, 1983, CAN J FISH AQUAT SCI, V40, P1820 COREY S, 1987, CRUSTACEANA, V52, P276 COVICH AP, 1999, BIOSCIENCE, V49, P119 CREED RP, 1994, ECOLOGY, V75, P2091 CROWL TA, 2001, ECOLOGY, V82, P775 DIEHL S, 1993, OIKOS, V68, P151 DORN NJ, 1999, VIE MILIEU, V49, P229 DUMONT HJ, 1975, OECOLOGIA, V19, P75 ESTES JA, 1978, ECOLOGY, V59, P822 FEMINELLA JW, 1989, HOLARCTIC ECOL, V12, P1 FLINT RW, 1975, LIMNOL OCEANOGR, V20, P935 GAMRADT SC, 1996, CONSERV BIOL, V10, P1155 GAMRADT SC, 1997, CONSERV BIOL, V11, P793 GEDDES P, 2003, OECOLOGIA, V136, P585 GUAN RZ, 1997, CONSERV BIOL, V11, P641 HOBBS HH, 1993, CONTRIB BIOL GEOL MI, V85, P1 HOWARTH RW, 2002, METHODS ECOSYSTEM SC, P72 KARLSSONELFGREN I, 2004, FRESHWATER BIOL, V49, P265 LEIBOLD MA, 1996, AM NAT, V147, P784 LODGE DM, 1987, CAN J FISH AQUAT SCI, V44, P591 LODGE DM, 1994, ECOLOGY, V75, P1265 LODGE DM, 1994, NORD J FRESHWATER RE, V69, P111 MAGNUSON JJ, 1975, P S WAT QUAL MAN BIO, P66 MATTHEWS M, 1992, HYDROBIOLOGIA, V234, P1 MCPEEK MA, 1990, ECOLOGY, V71, P83 MENGE BA, 1987, AM NAT, V130, P730 MITTELBACH GG, 1995, ECOLOGY, V76, P2347 MOMOT WT, 1977, J FISH RES BOARD CAN, V34, P2041 MOMOT WT, 1978, AM MIDL NAT, V99, P10 MOMOT WT, 1995, REV FISH SCI, V3, P33 NYSTROM P, 1996, FRESHWATER BIOL, V36, P631 NYSTROM P, 1996, FRESHWATER BIOL, V36, P673 NYSTROM P, 1999, CRAYFISH EUROPE ALIE, P63 NYSTROM P, 2000, OIKOS, V88, P181 NYSTROM P, 2001, ECOLOGY, V82, P1023 OLSEN TM, 1991, CAN J FISH AQUAT SCI, V48, P1853 PAINE RT, 1980, J ANIM ECOL, V49, P667 PERSSON L, 1999, OIKOS, V85, P385 PETERSON CH, 1989, OECOLOGIA, V80, P82 POLIS GA, 1996, AM NAT, V147, P813 POWER ME, 1992, ECOLOGY, V73, P1675 PRINGLE CM, 1998, ECOLOGY, V79, P269 SCHAUS MH, 2000, ECOLOGY, V81, P1701 STEIN RA, 1977, ECOLOGY, V58, P1237 STEIN RA, 1995, CAN J FISH AQUAT SCI, V52, P2518 STEINER CF, 2002, OECOLOGIA, V131, P549 STENROTH P, 2003, FRESHWATER BIOL, V48, P466 USIO N, 2002, OIKOS, V98, P512 VADAS RL, 1990, ENVIRON BIOL FISH, V27, P285 WELLBORN GA, 1996, ANNU REV ECOL SYST, V27, P337 WELSCHMEYER NA, 1994, LIMNOL OCEANOGR, V39, P1985 English
URL: Author Address: Michigan State Univ, WK Kellogg Biol Stn, Hickory Corners, MI 49060 USA. Michigan State Univ, Dept Zool, Hickory Corners, MI 49060 USA. Dorn, NJ, Florida Int Univ, Dept Biol Sci, Univ Pk, Miami, FL 33199 USA. dornn@fiu.edu
phosphorus release sediment lake water Microcystis bloom hyper eutrophic Abstract: To clarify the possible influence of Microcystis blooms on the exchange of phosphorus (P) between sediment and lake water, an enclosure expt. was conducted in the hypereutrophic subtropical Lake Donghu during July-Sept. 2000. Eight enclosures were used: six received sediment while two were sediment-free. In mid-August, Microcystis blooms developed in all the enclosures. There was a persistent coincidence between the occurrence of Microcystis blooms and the increase of both total P (TP) and sol. reactive P (SRP) concns. in the water of the enclosures with sediments. In sediment-free enclosures, TP and SRP concns. remained rather stable throughout the expt., in spite of the appearance of Microcystis blooms. The results indicate that Microcystis blooms induced massive release of P from the sediment, perhaps mediated by high pH caused by intense algal photosynthesis, and/or depressed concns. of nitrate nitrogen (NO3-N). [on SciFinder (R)] Notes: CAN 139:105838 61-2
Water Institute of Hydrobiology, State Key Laboratory for Freshwater Ecology and Biotechnology of China, Donghu Experimental Station of Lake Ecosystems,Chinese Academy of Sciences,Wuhan,Peop. Rep. China. Journal 0269-7491 written in English. 7723-14-0 (Phosphorus) Role: BCP (Biochemical process), POL (Pollutant), BIOL (Biological study), OCCU (Occurrence), PROC (Process) (dissolved; enhancement of dissolved phosphorus release from sediment to lake water by Microcystis blooms in a hyper-eutrophic, subtropical Chinese lake) Reference Type: Journal Article Record Number: 117 Author: Tonno, I.; Noges, T. Year: 2003 Title: Nitrogen fixation in a large shallow lake: rates and initiation conditions Journal: Hydrobiologia Volume: 490 Issue: 1-3 Pages: 23-30 Date: Jan Accession Number: ISI:000182463800003 Keywords: cyanobacterial N-2-fixation; shallow lake; TN/TP ratio; PO4-P enrichment experiments blue-green-algae; phytoplankton community structure; phosphorus supply ratios; marine ecosystems; fresh-water; n-p; cyanobacteria; limitation; bloom; nutrients
BROCK TD, 1994, BIOL MICROORGANISMS, P617 BULGAKOV NG, 1999, ARCH HYDROBIOL, V146, P3 COLE GA, 1983, TXB LIMNOLOGY, P324 FLETT RJ, 1976, CAN J MICROBIOL, V22, P43 FLETT RJ, 1980, CAN J FISH AQUAT SCI, V37, P494 GOLTERMAN HL, 1975, PHYSL LIMNOLOGY, P99 GRANHALL U, 1971, LIMNOL OCEANOGR, V16, P711 GRASSHOFF K, 1983, METHODS SEAWATER ANA HABERMAN J, 1998, LIMNOLOGICA, V28, P3 HAMBRIGHT KD, 2001, J PLANKTON RES, V23, P165 HARRIS GP, 1986, PHYTOPLANKTON ECOLOG, P137 HELAL HA, 1991, VERH INT VER THEOR A, V24, P1508 HORNE AJ, 1972, LIMNOL OCEANOGR, V17, P693 HORNE AJ, 1979, LIMNOL OCEANOGR, V24, P316 HOWARTH RW, 1985, SCIENCE, V229, P653 HOWARTH RW, 1988, LIMNOL OCEANOGR 2, V33, P688 HOWARTH RW, 1988, LIMNOL OCEANOGR, V33, P669 HOWARTH RW, 1990, LIMNOL OCEANOGR, V35, P1859 HUDSON JJ, 2000, NATURE, V406, P54 HUTTULA T, 1998, PRESENT STATE FUTURE KARL DM, 2000, NATURE, V406, P31 KOSTYAEV VJ, 1986, BIOL EKOLOGIYA AZOTF LEPPANEN JM, 1988, SYMBIOSIS, V6, P181 LEVINE SN, 1992, LIMNOL OCEANOGR, V37, P917 LEVINE SN, 1999, CAN J FISH AQUAT SCI, V56, P451 MACKAY NA, 1998, LIMNOL OCEANOGR, V43, P347 MICHARD M, 1996, ARCH HYDROBIOL, V135, P337 NIEMI A, 1979, ACTA BOT FENN, V110, P57 NIXDORF B, 1997, HYDROBIOLOGIA, V342, P269 NOGES P, 1999, SUSTAINABLE LAKE MAN NOGES T, 1999, HYDROBIOLOGIA, V409, P277 PRESING M, 1996, ARCH HYDROBIOL, V136, P553 PRESING M, 1997, HYDROBIOLOGIA, V342, P55 SCHINDLER DW, 1977, SCIENCE, V195, P260 SEIP KL, 1994, AQUAT SCI, V56, P16 SMITH VH, 1983, SCIENCE, V221, P669 SMITH VH, 1985, WATER RESOUR BULL, V21, P433 SMITH VH, 1990, LAKE RESERV MANAGE, V6, P125 SMITH VH, 1995, ARCH HYDROBIOL S, V107, P71 SMITH VH, 1999, ARCH HYDROBIOL, V146, P37 STEWART AJ, 1967, CAN J OPHTHALMOL, V2, P58 TILMAN D, 1982, ANNU REV ECOL SYST, V13, P349 TOETZ D, 1987, WATER RESOUR BULL, V23, P239 UTERMOHL H, 1958, MITT INT VER LIMNOL, V9, P1 English
URL: Author Address: Univ Tartu, Inst Zool & Hydrobiol, Estonian Agr Univ, Inst Zool & Bot,Vortsjarv Limnol Stn, EE-61101 Rannu, Tartu County, Estonia. Tonno, I, Univ Tartu, Inst Zool & Hydrobiol, Estonian Agr Univ, Inst Zool & Bot,Vortsjarv Limnol Stn, EE-61101 Rannu, Tartu County, Estonia. Reference Type: Journal Article Record Number: 118 Author: Salmaso, N. Year: 2003 Title: Life strategies, dominance patterns and mechanisms promoting species coexistence in phytoplankton communities along complex environmental gradients Journal: Hydrobiologia Volume: 502 Issue: 1-3 Pages: 13-36 Date: Jul Accession Number: ISI:000186636900002 Keywords: phytoplankton; ecological niches; community change rate; complex environmental gradients; multivariate analyses; deep lakes lake lake-garda; planktothrix rubescens; ceratium-hirundinella; aquatic systems; algae; diversity; succession; diatoms; ecology; zurich Abstract: This paper analyses the life strategies, the dominance patterns and the diversity in phytoplankton communities in large and deep lakes. The study was carried out on the largest Italian Lake (Lake Garda) from 1995 to 2000. Different statistical analyses were applied. For phytoplankton the time variable represents a complex environmental gradient driving annual succession; this gradient was made explicit by the application of PCA analyses to the environmental data. The use of Non Metric Multi Dimensional Scaling applied to Bray-Curtis dissimilarity matrices revealed an ordered and cyclic development of phytoplankton every year; the Bray-Curtis index, calculated between pairs of chronologically contiguous samples, was also used as a measure of the community change rate (beta(t)) over the temporal succession. A significant relationship between beta(t) and the complex environmental gradient was assessed. Finally, for every phytoplankton species, the optimum conditions for growth and the realised niches were determined. The positioning of the species on the complex environmental gradient, and the contemporaneous application of cluster analysis based on the different specific environmental optima, highlighted primarily the existence of two groups at the extreme of the complex environmental gradient. The first group included the large late winter/spring diatoms, which developed during high water turbulence and strong physical control, high nutrient concentrations, low light conditions and reduced competition. The second group was composed by many heterogeneous summer species characterised by the ability to contrast losses by grazing and sinking in stratified and stable conditions, and the ability of tolerating nutrient deficiency. A third group of species developed during environmental conditions in the middle of the two previous extremes. These included the three master species Mougeotia sp., Fragilaria crotonensis and Planktothrix rubescens/agardhii. The endogenous and exogenous mechanisms promoting species coexistence are discussed, along with the applicability of competitive and equilibrium/non-equilibrium theories to phytoplankton dynamics. 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Salmaso, N, Univ Padua, Dipartimento Biol, Via U Bassi 58-B, I-35131 Padua, Italy. Reference Type: Journal Article Record Number: 119 Author: Ojala, A.; Kokkonen, S.; Kairesalo, T. Year: 2003 Title: The role of phosphorus in growth of phytoplankton in Lake Vesijarvi, southern Finland - a multitechnique approach Journal: Aquatic Sciences Volume: 65 Issue: 3 Pages: 287-296 Accession Number: ISI:000185741300011 Keywords: phosphorus; nutrient limitation; [P-33]; elemental ratios; cyanobacteria fresh-water; nutrient limitation; nitrogen-fixation; phosphate; carbon; algae; bacterioplankton; communities; temperature; irradiance
BEARDALL J, 2001, AQUAT SCI, V63, P44 COCHLAN WP, 1991, J PHYCOL, V27, P673 COTNER JB, 1992, LIMNOL OCEANOGR, V37, P232 CURRIE DJ, 1984, LIMNOL OCEANOGR, V29, P311 ELSER JJ, 1990, CAN J FISH AQUAT SCI, V47, P1468 GEIDER RJ, 1998, EUR J PHYCOL, V33, P315 GOLDMAN CR, 1978, MITT INT VER LIMNOL, V21, P364 GRONLUND L, 1996, HYDROBIOLOGIA, V331, P97 HEALEY FP, 1980, CAN J FISH AQUAT SCI, V37, P442 HECKY RE, 1988, LIMNOL OCEANOGR, V33, P796 HECKY RE, 1993, LIMNOL OCEANOGR, V38, P709 HORPPILA J, 1998, RESTOR ECOL, V6, P20 HOWARTH RW, 1988, LIMNOL OCEANOGR 2, V33, P688 HUDSON JJ, 2000, NATURE, V406, P54 JANSSON M, 1988, HYDROBIOLOGIA, V170, P177 KAIRESALO T, 1999, HYDROBIOLOGIA, V395, P99 KANNINEN J, 1982, HYDROBIOLOGIA, V86, P81 KARL DM, 2000, NATURE, V406, P31 KETO J, 1982, HYDROBIOLOGIA, V86, P195 KETO J, 1988, AQUA FENNICA, V18, P193 KETO J, 1992, HYDROBIOLOGIA, V243, P303 KETO J, 2000, BOREAL ENVIRON RES, V5, P15 KOROLEFF F, 1979, MERI, V7, P1 KUKKONEN S, 1997, PROC INT ASSOC THE 2, V26, P502 LABRY C, 2002, J PLANKTON RES, V24, P97 LAZERTE B, 1981, CAN J FISH AQUAT SCI, V38, P524 MORRIS DP, 1988, FRESHWATER BIOL, V20, P315 MURPHY J, 1962, ANAL CHIM ACTA, V27, P31 NICHOLLS KH, 1978, INT REV GES HYDROBIO, V63, P141 OJALA A, 1993, J PHYCOL, V29, P278 PICKLES AR, 1987, REG STUD, V21, P425 RAI H, 1990, ARCH HYDROBIOL, V118, P421 REDFIELD AC, 1958, AM SCIENTIST, V46, P205 REYNOLDS CS, 1984, ECOLOGY FRESHWATER P RICHARDSON K, 1983, NEW PHYTOL, V93, P157 ROTHHAUPT KO, 1992, LIMNOL OCEANOGR, V37, P739 SALONEN K, 1979, LIMNOL OCEANOGR, V24, P177 SCHAEFFER M, 1997, ECOLOGY, V78, P272 SCHINDLER DW, 1977, SCIENCE, V195, P260 SCHINDLER DW, 1978, LIMNOL OCEANOGR, V23, P478 SMITH VH, 1982, LIMNOL OCEANOGR, V27, P1101 SUTTLE CA, 1990, LIMNOL OCEANOGR, V35, P424 TRIMBEE AM, 1987, CAN J FISH AQUAT SCI, V44, P1337 TYRRELL T, 1999, NATURE, V400, P525 UTERMOHL H, 1958, MITT INT VER LIMNOL, V9, P1 WATSON SB, 1997, LIMNOL OCEANOGR, V42, P487 WETZEL RG, 1979, LIMNOLOGICAL ANAL WHITE E, 1989, ARCH HYDROBIOL BEIH, V32, P165 WOOD ED, 1967, J MAR BIOL ASSOC UK, V47, P23 WURTSBAUGH WA, 1983, CAN J FISH AQUAT SCI, V40, P1419 English
Directory: chemistry chemistry -> Summer 2015 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Application for Summer Undergraduate Research Program nsf research Experiences for Undergraduates (reu) – 2015 Please Print Clearly or Type chemistry -> Application for Summer Undergraduate Research Program nsf research Experiences for Undergraduates (reu) – 2016 Please Print Clearly or Type chemistry -> Summer 2014 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Summer 2016 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Cloud Point Extraction Methodology for Separation and Microamounts Determination of Lead chemistry -> Spring Hill College List of Nearby Restaurant Options Atlanta Bread Company chemistry -> Where the heck is Fernando de Noronha? chemistry -> Topics 6 & 16: Kinetics 1 Collision theory and rates of reaction Download 1.4 Mb. Share with your friends:
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