A persistent bloom of the diatom Rhizosolenia eriensis (Smith) and other changes associated with decreases in heavy metal contamination in an Oligotrophic lake, Vancouver Island
作者： John Deniseger , Alan Austin , Mike Roch , Malcolm J.R. Clark
DOI: 10.1016/0098-8472(86)90033-X
关键词: Environmental science 、 Dominance (ecology) 、 Diatom 、 Nutrient 、 Algae 、 Trophic state index 、 Bloom 、 Phytoplankton 、 Zooplankton 、 Ecology
摘要: Abstract Since May, 1967 a copperleadzinc mine has been source of heavy metal input into previously uncontaminated long, narrow, oligotrophic lake, Buttle Lake, situated on Vancouver Island, British Columbia. After peaking in 1980/81, concentations the lake have steadily decreased as result improved treatment systems. Nevertheless, single species diatom, Rhizosolenia eriensis , now dominates phytoplankton community to virtual absence other species. Changes nutrient patterns may give R. competitive advantage over is present quantities up 11, 000 cells/ml and cell accumulates zinc 56, times copper 34, water concenrations. The dominance contributed continuing decline zooplankton numbers through unpalatability.
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