A Survey of Aquatic Invertebrate Communities in Nebraska Sandhill Lakes Reveals Potential Alternative Ecosystem States
作者： Jeffrey C. Jolley , Emily S. Albin , Mark A. Kaemingk , David W. Willis
关键词: Alternative stable state 、 Abundance (ecology) 、 Biomass (ecology) 、 Zooplankton 、 Sandhill 、 Fishery 、 Phytoplankton 、 Ecosystem 、 Environmental science 、 Ecology 、 Food web
摘要: Abstract Aquatic invertebrate communities are important to shallow lake ecosystem form and function, providing vital components the food web thereby achieving management goals. We characterized physicochemical variables in six Nebraska Sandhill lakes examined these characteristics within an alternative stable state framework. Surveys were conducted during 2005 each of by sampling aquatic macroinvertebrate abundance, zooplankton abundance biomass, phytoplankton variables. When placed framework, response exhibited a gradient different states. Two appeared congruent with clear water (dense submergent vegetation, high diversity, low phytoplankton), two turbid (high phytoplankton, vegetation coverage, diversity...
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