How anthropogenic darkening of Lake Apopka induced benthic light limitation and forced the shift from macrophyte to phytoplankton dominance
How anthropogenic darkening of Lake Apopka induced benthic light limitation and forced the shift from macrophyte to phytoplankton dominance
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DOI：
10.4319/lo.2010.55.3.1201
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发表时间：
2010-05-01
影响因子：
4.5
通讯作者：
Coveney, Michael F.
中科院分区：
文献类型：
--
作者：
Schelske, Claire L.;Lowe, Edgar F.;Coveney, Michael F.
Controversy exists about the historic shift of primary producer community structure (PPCS) in Lake Apopka, a shallow, 125-km(2) lake in central Florida, U. S. A. The controversial questions are: was a lake-wide shift from macrophyte to phytoplankton dominance triggered by a 1947 hurricane or tornadoes spawned by the hurricane within a few weeks or months, or was the shift forced by progressive cultural eutrophication over several years? In 1947, fringing wetlands (35 km(2)) were being diked and drained for agricultural purposes changing their function from nutrient sinks to nutrient point sources to the lake. We examined whether anthropogenic darkening of the water column induced the PPCS shift during a 0.6-m lake-stage rise. Darkening was defined as lake-bottom photosynthetically available radiation (PAR)
