Effects of acidification on metal accumulation by aquatic plants and invertebrates. 2. Wetlands, ponds and small lakes
Effects of acidification on metal accumulation by aquatic plants and invertebrates. 2. Wetlands, ponds and small lakes
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DOI：
10.1002/etc.5620120603
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发表时间：
1993-06
影响因子：
4.1
通讯作者：
P. Albers;M. B. Camardese
中科院分区：
文献类型：
--
作者：
P. Albers;M. B. Camardese
比较了马里兰州和缅因州湿地、池塘和小湖泊的水、植物和水生无脊椎动物中Al、Cd、Ca、Cu、Fe、Pb、Mg、Mn、Hg、Ni、P和Zn的浓度。水生植物和昆虫对重金属的积累以及水体中重金属的浓度受pH值的影响不大。水体中的重金属浓度与昆虫体内的重金属浓度无显著相关性。植物重金属含量与水体重金属含量相关性较差。金属浓度超过可接受的饮食水平更经常在植物比无脊椎动物。对以酸化沃茨中的无脊椎动物和植物为食的鸟类的金属毒性的担忧似乎是没有根据的。pH值与水体钙、昆虫钙和植物钙之间的正相关关系表明，酸化可降低水生生物的钙含量。水生昆虫低钙，但小龙虾和蜗牛，这是不利的低pH值的影响，是非常高的。水禽的一个问题是钙剥夺从低pH值的湿地，池塘和小湖泊的钙可用性下降。
Compared were concentrations of Al, Cd, Ca, Cu, Fe, Pb, Mg, Mn, Hg, Ni, P, and Zn in water, plants, and aquatic invertebrates of wetlands, ponds, and small lakes in Maryland and Maine. The accumulation of metals by aquatic plants and insects and the concentration of metals in water were not greatly affected by pH. None of the metal concentrations in water significantly correlated with metals in insects. Plant metal concentrations poorly correlated with metal concentrations in water. Concentrations of metals exceeded acceptable dietary levels more frequently in plants than in invertebrates. Concerns about metal toxicity in birds that feed on invertebrates and plants from acidified waters seem to be unwarranted. Positive correlations among pH, Ca in water, Ca in insects, and Ca in plants imply that acidification can reduce the Ca content of aquatic biota. Aquatic insects were low in Ca, but crayfishes and snails, which are adversely affected by low pH, were very high. A concern for waterfowl is Ca deprivation from decreased Ca availability in low-pH wetlands, ponds, and small lakes.