MICROARTHROPODA AND ENCHYTRAEIDAE (OLIGOCHAETA) IN NATURALLY LEAD-CONTAMINATED SOIL - A GRADIENT STUDY
MICROARTHROPODA AND ENCHYTRAEIDAE (OLIGOCHAETA) IN NATURALLY LEAD-CONTAMINATED SOIL - A GRADIENT STUDY
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DOI：
10.1093/ee/19.5.1263
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发表时间：
1990-10-01
影响因子：
1.7
通讯作者：
ABRAHAMSEN, G
中科院分区：
文献类型：
--
作者：
HAGVAR, S;ABRAHAMSEN, G
研究了挪威云杉（Picea abies（L.）喀斯特、森林进行了研究，从未受污染的土壤中的无植被区的中间梯度。由于基岩中溶解的铅，约50平方米的森林地面缺乏植被，另有50平方米的植被发育不良。生腐殖土中铅含量高达10-15%干重。铅含量的增加使植物和微型节肢动物的物种数量逐渐减少。微型节肢动物在铅污染土壤中的生存能力各不相同。确认了四个群体：（1）与正常植被相关的敏感物种，（2）即使在植被严重减少的地区也存在的不太敏感的物种，（3）将其范围扩展到无植被地区的耐受物种，以及（4）受强铅污染影响的微型节肢动物（弹尾目中的Isotoma olivacea Tullberg和螨类中的Nanopestes sp.）。 由于少数物种在无植被区的增长强劲，微型节肢动物的总丰度在整个梯度上几乎保持不变。植被覆盖沿着铅梯度的变化是一个混杂因素，但敏感的物种被证明是同样消极的反应时，植被因素保持不变的铅水平增加。可能的适应铅在冰后期进行了讨论。
The microarthropod and enchytraeid fauna of a natural lead-contaminated soil in a Norwegian spruce, Picea abies (L.) Karst., forest was studied in gradients from unpolluted soil to the middle of a vegetation-free area. Because of dissolved lead from the bedrock, about 50 m2 of the forest floor lacked vegetation, and another 50 m2 had weakly developed vegetation. The lead content in the raw humus was up to 10-15% dry wt. Increasing levels of lead gave a gradual reduction in species numbers among plants and microarthropods. Microarthropod species varied in their ability to live in lead-polluted soil. Four groups were recognized: (1) sensitive species associated with normal vegetation, (2) less sensitive species occurring even in areas with strongly reduced vegetation, (3) tolerant species extending their range into vegetation-free areas, and (4) microarthropods favored by strong lead pollution (Isotoma olivacea Tullberg among Collembola and Nanorchestes sp. among mites). Because a few species increased strongly in the vegetation-free area, the total abundance of microarthropods remained almost the same throughout the gradient. Changes in vegetation cover along the lead gradient is a confounding factor, but sensitive species proved to react equally negatively to increased lead levels when the vegetation factor was kept constant. Possible adaptations to lead during the postglacial period are discussed.