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The long term effects of subtle temperature rises on aquatic micro-ecosystems

The long term effects of subtle temperature rises on aquatic micro-ecosystems Three-stage aquatic microcosms have been employed to investigate the long-term effects of subtle temperature rises. The type of microcosm used consists of three seperate aquaria, each representing one of the following trophic levels: autotrophs, herbivores and decomposers. The subsystems are interconnected by a pump-driven circulation flow. During a two-year experiment four of these systems have been subjected to a sequence of temperatures. Assuming the winter situation to be the most critical period regarding thermal pollution, the temperatures varied between 5°C and 17°C. Each temperature has been sustained for a period of at least 100 days, to ensure the development of ecological relevant steady-states. The parameters observed, such as oxygen, phosphate and nitrate concentration, particle volume and zooplankton biomass, show a totally reversible effect to temperature in those cases that any effect is detectable. The systems show little “memory” in reacting to temperature alterations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aquatic Ecology Springer Journals

The long term effects of subtle temperature rises on aquatic micro-ecosystems

Aquatic Ecology , Volume 13 (3) – Dec 1, 1979

The long term effects of subtle temperature rises on aquatic micro-ecosystems

Abstract

Three-stage aquatic microcosms have been employed to investigate the long-term effects of subtle temperature rises. The type of microcosm used consists of three seperate aquaria, each representing one of the following trophic levels: autotrophs, herbivores and decomposers. The subsystems are interconnected by a pump-driven circulation flow. During a two-year experiment four of these systems have been subjected to a sequence of temperatures. Assuming the winter situation to be the most...
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Publisher
Springer Journals
Copyright
Copyright
Subject
Life Sciences; Freshwater & Marine Ecology; Ecosystems
ISSN
1386-2588
eISSN
1573-5125
DOI
10.1007/BF02284736
Publisher site
See Article on Publisher Site

Abstract

Three-stage aquatic microcosms have been employed to investigate the long-term effects of subtle temperature rises. The type of microcosm used consists of three seperate aquaria, each representing one of the following trophic levels: autotrophs, herbivores and decomposers. The subsystems are interconnected by a pump-driven circulation flow. During a two-year experiment four of these systems have been subjected to a sequence of temperatures. Assuming the winter situation to be the most critical period regarding thermal pollution, the temperatures varied between 5°C and 17°C. Each temperature has been sustained for a period of at least 100 days, to ensure the development of ecological relevant steady-states. The parameters observed, such as oxygen, phosphate and nitrate concentration, particle volume and zooplankton biomass, show a totally reversible effect to temperature in those cases that any effect is detectable. The systems show little “memory” in reacting to temperature alterations.

Journal

Aquatic EcologySpringer Journals

Published: Dec 1, 1979

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