population dynamics and community ecology of zooplankton ii
TRANSCRIPT
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
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.
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.
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.
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.
Vertical distribution of Daphnia retrocurva in Lake Michigan
Williamson et al. (2011). Toward a more comprehensive theory of zooplankton diel vertical migration
Williamson et al. (2011). Toward a more comprehensive theory of zooplankton diel
vertical migration
Orientation of Daphnia relative to the shore and open water
Horizontal distribution of rotifer and crustacean zooplankters in a Swedish lake
Jeppesen, et al. (1997). Top-down control in freshwater lakes
Jeppesen, et al. (1997). Top-down control in freshwater lakes
The Alewife in Crystal Lake, Conn
Messner, et al. (2013) Higher temperatures enhance the effects of invasive sports fish on
mountain zooplankton communities
Messner, et al. (2013) Higher temperatures enhance the effects of invasive sports fish
on mountain zooplankton communities
Trophic production in plankton and nekton in Lake Erken
Lacustrine food web
Zooplankton production in Mirror Lake, NH
Zooplankton production in Mirror Lake, NH
Ricciardi et al. (2012). Forecasting the ecological impacts of the Hemimysis invasion in North America
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