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Although zooplankton are primarily transported by ambient water currents, many have locomotion, used to avoid predators (as in diel vertical migration) or to increase prey encounter rate. Just as any species can be limited within a geographical region, so are zooplankton.
This is because the bottom of a lake's debris and substrates provide rich habitat niches. [6] A limnetic zooplankton population will usually consist of two to four species, each in a different genus. [6] In addition to zooplankton, organisms in the limnetic zone include insects and fishes.
The zebra mussel (Dreissena polymorpha) is a small freshwater mussel, an aquatic bivalve mollusk in the family Dreissenidae.The species originates from the lakes of southern Russia and Ukraine, [3] but has been accidentally introduced to numerous other areas and has become an invasive species in many countries worldwide.
Daphnia pulicaria generally live in deep, permanent lakes. [7] These lakes provide a more stable environment than temporary ponds, which eventually dry up, so populations of D. pulicaria tend to have lower mortality rates than D. pulex populations living in ponds. [7] Furthermore, D. pulicaria have a relatively long lifespan of 60–65 days. [8]
A planktivore is an aquatic organism that feeds on planktonic food, including zooplankton and phytoplankton. [1] [2] Planktivorous organisms encompass a range of some of the planet's smallest to largest multicellular animals in both the present day and in the past billion years; basking sharks and copepods are just two examples of giant and microscopic organisms that feed upon plankton.
Coregonus zugensis, also known as the Swiss whitefish, is a freshwater species of fish of the subfamily Coregoninae which is found in Europe lakes of Lucerne and Zug. [2] However, in a recent study, it was found that the species had been extirpated from Lake Zug.
A study of 29 lakes found that the rate of bacterial growth more than doubled when plastic pollution raised the overall carbon level in lake water by just 4%. ... found that European lakes are ...
[3] [7] Lakes are divided into photic and aphotic regions, the prior receiving sunlight and latter being below the depths of light penetration, making it void of photosynthetic capacity. [2] In relation to lake zonation, the pelagic and benthic zones are considered to lie within the photic region, while the profundal zone is in the aphotic ...