34 research outputs found
Seasonal variation in fish trophic networks in two clear-water streams in the Central Llanos region, Venezuela
The association of circulating levels of complement-C1q TNF-related protein 5 (CTRP5) with nonalcoholic fatty liver disease and type 2 diabetes: a case–control study
Taxonomic composition and feeding habits of Chironomidae in Cerrado streams (Southeast Brazil): impacts of land use changes
Flatworms like it round: nematode consumption by Planaria torva (MĂĽller 1774) and Polycelis tenuis (Ijima 1884)
The biochemical composition and calorific content of a rotifer and its algal food: comparison of a two stage chemostat and batch culture
Evaluating the anesthetization and fixation efficacy of “soft” and “hard” freshwater benthic meiofauna: what is the best method for specimen preservation?
Rotifer communities under variable predation-turbulence combinations
The effects of water turbulence on rotifer communities were experimentally studied under different predation pressures. When the larvae of the phantom midge (Chaoborus flavicans) were present in turbulent water, the abundance of most rotifer taxa was enhanced. Especially the genera Chromogaster, Keratella, Polyarthra, and Trichocerca, increased in abundance. In calm water, chaoborids did not affect the rotifer community. In turbulent water predation by chaoborids was targeted more towards cladocerans (Bosmina sp.) and predation pressure on rotifers was relaxed. Additionally, reduced competition with cladocerans probably contributed to the increase of rotifer abundance. Turbulence alone had no significant effect on rotifer abundance because their individual size was small compared with the diameter of the turbulent eddies. The study suggested that the effects of turbulence on rotifers is not direct but takes place through changed predator-prey relations, i.e., the effect depends on the abundance of invertebrate predators. In aquatic ecosystems with a high density of chaoborids, increasing turbulence can considerably increase the abundance of rotifers.Peer reviewe
Temporal patterns in macrograzer effects on epilithic algae and meiofauna: a comparative approach to test for single species and whole grazer community effects
Peters L, Traunspurger W. Temporal patterns in macrograzer effects on epilithic algae and meiofauna: a comparative approach to test for single species and whole grazer community effects. Aquatic Sciences. 2012;74(2):229-240