Download Lake Ecosystem Ecology: A Global Perspective by Gene E. Likens PDF

By Gene E. Likens

A spinoff of the Encyclopedia of Inland Waters, Lake surroundings Ecology examines the workings of the lake and reservoir ecosystems of our planet. details and views an important to the knowledge and administration of present environmental difficulties are lined, akin to eutrophication, acid rain and weather switch. as the articles are drawn from an encyclopedia, the articles are simply obtainable to individuals of the general public, akin to conservationists and environmental choice makers. - contains an updated precis of world aquatic ecosystems and issues.- Covers present environmental difficulties and administration solutions.- positive factors full-color figures and tables to aid the textual content and relief in figuring out.

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Extra info for Lake Ecosystem Ecology: A Global Perspective

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Lake Ecosystems: Structure, Function and Change _ Littoral Zone 25 % Reliance on littoral food chain 100 80 60 40 20 Pla be nkt nth ivo ivo re/ re vo re Be nth i Pis civ ore Pla nk tiv ore 0 Figure 7 The range of reliance different types of fishes have on littoral zone resources. Modified from Vadeboncoeur et al. (2005) Effects of multi-chain omnivory on the strength of trophic control in lakes. Ecosystems 8: 682–693. , water purification, water supply) from the littoral zones of lakes. In turn, humans have immense impacts on the structure and function of the littoral zone.

The loss of oxygen depends on the size of the hypolimnion, its temperature, the duration of stratification, and the amount of organic matter coming down to it from above, which is a byproduct of the trophic status of the lake. , 10–20 m), the hypolimnion may be absent, as the metalimnion reaches the bottom of the lake. , >100 m), the hypolimnion may be much larger than the epilimnion. Lakes with a very large hypolimnion often maintain hypolimnetic oxygen throughout the stratification season, especially at temperate latitudes where the hypolimnion is cool.

The littoral zone has therefore been described as a ‘metabolic sieve’ or ‘trap’ because of its ability to strain incoming water and nutrients before passing it on to the pelagic and profundal zone. In many cases, most of the dissolved organic matter and nutrients that are not used in the littoral zone will ultimately be lost to sedimentation and burial in the profundal zone. ) that influence the type of chemical and biological processes that occur in the littoral zone. For example, high concentrations of ions such as calcium and magnesium increase the buffering capability of lakes.

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