population dynamics and community ecology of zooplankton ii
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POPULATION DYNAMICS AND COMMUNITY ECOLOGY OF ZOOPLANKTON II. Often see coexistence of several congenerics . Mechanisms which promote their coexistence: Seasonal separation Vertical separation Size differences in prey . - PowerPoint PPT PresentationTRANSCRIPT
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POPULATION DYNAMICS AND COMMUNITY ECOLOGY OF ZOOPLANKTON II
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Often see coexistence of several congenerics.
Mechanisms which promote their coexistence:• Seasonal separation• Vertical separation• Size differences in prey
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An oxbow (Varza Lake) was examined for vertical migration by zooplankters
Rejas, D., L. de Meester, L. Ferrufino, M. Maldonado, and F. Ollevier. 2007. Diel vertical migration of zooplankton in an Amazonian varzea lake. Studies on Neotropical Fauna and Environment. 42(1): 71-81.
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Vertical Migration by Microcrustaceans
Figure 3. Vertical distribution of the microcrustacean taxa (Mesocyclops and Notodiaptomus) in Laguna Bufeos. Abundance is expressed as percentage of total number of individuals in vertical profile. White bars: day; dark bars: night. Error bars equal twice the standard error of the mean.
Rejas, D., L. de Meester, L. Ferrufino, M. Maldonado, and F. Ollevier. 2007. Diel vertical migration of zooplankton in an Amazonian varzea lake. Studies on Neotropical Fauna and Environment. 42(1): 71-81.
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Vertical Migration by RotifersFigure 4. Vertical distribution of the rotifer taxa in Laguna Bufeos. Abundance is expressed as percentage of total number of individuals in vertical profile. White bars: day; dark bars: night. Error bars equal twice the standard error of the mean.
Rejas, D., L. de Meester, L. Ferrufino, M. Maldonado, and F. Ollevier. 2007. Diel vertical migration of zooplankton in an Amazonian varzea lake. Studies on Neotropical Fauna and Environment. 42(1): 71-81.
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Rangel, L.M., L.H.S. Silva, M.S. Arcifa, and A. Perticarrari. 2009. Driving forces of the diel distribution of phytoplankton functional groups in a shallow tropical lake. Brazilian Journal of Biology. 69(1): doi: 10.1590/S1519-69842009000100009.
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Vertical distribution of Daphnia retrocurva in Lake Michigan
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Williamson et al. (2011). Toward a more comprehensive theory of zooplankton diel vertical migration
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Williamson et al. (2011). Toward a more comprehensive theory of zooplankton diel
vertical migration
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Orientation of Daphnia relative to the shore and open water
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Horizontal distribution of rotifer and crustacean zooplankters in a Swedish lake
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Jeppesen, et al. (1997). Top-down control in freshwater lakes
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Jeppesen, et al. (1997). Top-down control in freshwater lakes
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The Alewife in Crystal Lake, Conn
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Messner, et al. (2013) Higher temperatures enhance the effects of invasive sports fish on
mountain zooplankton communities
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Messner, et al. (2013) Higher temperatures enhance the effects of invasive sports fish
on mountain zooplankton communities
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Trophic production in plankton and nekton in Lake Erken
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Lacustrine food web
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Zooplankton production in Mirror Lake, NH
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Zooplankton production in Mirror Lake, NH
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Ricciardi et al. (2012). Forecasting the ecological impacts of the Hemimysis invasion in North America
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Summary for Zooplankton in Freshwater Systems
Rivers Reservoirs Lakes
Zooplankton community structure
Dominated by small forms with rapid, mostly benthic, life cycles
Gradient from riverine to lacustrine forms
Complex communities with protistan mesozooplankton and macrozooplankton
Zooplankton community development
Low development; mainly derived from lakes and floodplain
Highest development in transitional zone
Vertical and seasonal gradients; stable and abundant
Zooplankton feeding Mainly particulate detritus; some planktonic or benthic algae
Detritus and phytoplankton
Phytoplankton dominant food source
Zooplankton growth Low, but highest in high-order streams; limited by displacement by unidirectional flow
Low to moderate; but variable with changing food availability and quality
Moderate to high