Predicting Cyanobacteria dominance in lakes
Predicting Cyanobacteria dominance in lakes
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DOI：
10.1139/cjfas-58-10-1905
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发表时间：
2001-10-01
影响因子：
2.4
通讯作者：
McCauley, E
中科院分区：
文献类型：
--
作者：
Downing, JA;Watson, SB;McCauley, E
一个有争议的水生生态学规则声称，低比例的氮磷（N：P）导致有毒的，有时有毒的蓝藻水华。蓝藻优势是对人类和生态系统健康的主要风险。因此，对蓝细菌的化学计量控制已成为淡水资源管理的核心。这一有争议的概念是基于在低氮磷湖泊中观察到的蓝藻优势以及实验室和现场实验的结果。在这里，我们分析了来自温带地区99个研究最多的湖泊的数据，并表明这个模型是有缺陷的。我们发现，蓝藻水华的水质退化的风险是更强烈的相关性比N：P的比例在总P，总N，或站在藻类生物量的变化。因此，与蓝藻相关的风险与N：P比与营养浓度和藻类生物量的简单增加。
A controversial precept of aquatic ecology asserts that low ratios of nitrogen to phosphorus (N:P) lead to noxious and sometimes toxic blooms of Cyanobacteria. Cyanobacteria dominance is a major risk to human and ecosystem health. The stoichiometric control of Cyanobacteria therefore has become central to freshwater resource management. This controversial concept is based on observed Cyanobacteria dominance in lakes with low N:P and the results of lab and field experiments. Here we analyze data from 99 of the temperate zone's most studied lakes and show that this model is flawed. We show that the risk of water quality degradation by Cyanobacteria blooms is more strongly correlated with variation in total P, total N, or standing algae biomass than the ratio of N:P. Risks associated with Cyanobacteria are therefore less associated with N:P ratios than a simple increase in nutrient concentrations and algal biomass.