Freshwater zooplankton community structure: introduction of large invertibrate predators and large herbivores to a small-species community. Vanni, M., J. Canadian Journal of Fisheries and Aquatic Sciences, 45:1758-1770, 1988. ![Freshwater zooplankton community structure: introduction of large invertibrate predators and large herbivores to a small-species community [pdf]](https://bibbase.org/img/filetypes/pdf.svg "pdf")
Paper abstract bibtex Two hypotheses have been proposed to explain the scarcity of small zooplankton species in fishless lakes, in which large zooplankton species dominate: (1) selective predation on small species by large invertebrate predators and (2) competitive suppression sf small species by large herbivores. These hypotheses were tested at the Exper- imental Lakes Area (ELA) by introducing a large invertebrate predator, Chaobsaus americanus, and a large her- bivore, Daphnia catawba, both common in fishless ELA lakes, into a zooplankton community typical of ELA lakes with fish (small zooplankton species present). Chaoborus had much more of an impact than D. catawba on resident zooplankton, although both introduced species significantly reduced the abundance of some resident species. Daphnia galeata mendotap, the dominant species in the absence of introduced species, was reduced to virtual extinction by Chaoborus. The cladocerans Bosr~aEna and Diaphanosoma, the copepsds Diaptsmus spp., and the rotifer Cowochilus also were reduced in abundance by Chaoborus. DaphnEa gabeata rnendstae and Bos- mina were the only resident species consistently reduced in abundance by B. catawba. These results support current conceptual models that depict invertebrate predation as an important factor responsible for the relative scarcity of small zooplankton species in fishless lakes.
@article{
title = {Freshwater zooplankton community structure: introduction of large invertibrate predators and large herbivores to a small-species community},
type = {article},
year = {1988},
pages = {1758-1770},
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abstract = {Two hypotheses have been proposed to explain the scarcity of small zooplankton species in fishless lakes, in which large zooplankton species dominate: (1) selective predation on small species by large invertebrate predators and (2) competitive suppression sf small species by large herbivores. These hypotheses were tested at the Exper- imental Lakes Area (ELA) by introducing a large invertebrate predator, Chaobsaus americanus, and a large her- bivore, Daphnia catawba, both common in fishless ELA lakes, into a zooplankton community typical of ELA lakes with fish (small zooplankton species present). Chaoborus had much more of an impact than D. catawba on resident zooplankton, although both introduced species significantly reduced the abundance of some resident species. Daphnia galeata mendotap, the dominant species in the absence of introduced species, was reduced to virtual extinction by Chaoborus. The cladocerans Bosr~aEna and Diaphanosoma, the copepsds Diaptsmus spp., and the rotifer Cowochilus also were reduced in abundance by Chaoborus. DaphnEa gabeata rnendstae and Bos- mina were the only resident species consistently reduced in abundance by B. catawba. These results support current conceptual models that depict invertebrate predation as an important factor responsible for the relative scarcity of small zooplankton species in fishless lakes.},
bibtype = {article},
author = {Vanni, M. J.},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
keywords = {L221}
}
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