Relationship between testate amoeba (Protist) communities and atmospheric heavy metals accumulated in Barbula indica (Bryophyta) in vietnam
Relationship between testate amoeba (Protist) communities and atmospheric heavy metals accumulated in Barbula indica (Bryophyta) in vietnam
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DOI：
10.1007/s00248-006-9108-y
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发表时间：
2007-01-01
影响因子：
3.6
通讯作者：
Gilbert, D.
中科院分区：
文献类型：
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作者：
Nguyen-Viet, H.;Bernard, N.;Gilbert, D.
研究了河内市及周边29个采样点的藓类植物Barbula indica中有壳阿米巴群落与重金属（Pb、Cd、Zn、Ni、Cu、Mn和Fe）浓度之间的关系。我们的第一种方法是比较城市（1区）和周围（2区）之间的重金属浓度和有遗嘱的变形虫变量。平均苔藓浓度的铅，镉，锌，镍，铜显着较高，有壳变形虫物种丰富度和丰度显着较低的区域1和丰富的8个类群之间的差异显着两个区域。然后，我们研究了重金属和有壳变形虫之间的相关性。物种丰富度和丰度与铅浓度呈负相关。Shannon H'与Pb、Cd均呈负相关。几个物种的丰度与铅，镉，锌，镍呈负相关，然而，在社区水平上，铅成为唯一显着的变量在冗余分析。结果表明，有壳变形虫对重金属污染特别是铅污染敏感，可能是一种良好的生物指示剂。需要进一步的研究来理解观察到的模式背后的因果关系。
We studied the relationships between testate amoeba communities and heavy metal (Pb, Cd, Zn, Ni, Cu, Mn, and Fe) concentrations in the moss Barbula indica sampled at 29 sites in and around the city of Hanoi (Vietnam). Our first approach was to compare the heavy metal concentrations and testate amoeba variables between the city (zone 1) and the surrounding (zone 2). Mean moss concentrations of Pb, Cd, Zn, Ni, and Cu were significantly higher and testate amoeba species richness and abundance were significantly lower in zone 1 and the abundance of eight taxa differed significantly between the two zones. We then studied the correlation between heavy metals and testate amoebae. Species richness and abundance were correlated negatively to Pb concentration. Shannon H' was negatively correlated to both Pb and Cd. The abundance of several species was negatively correlated with Pb, Cd, Zn, and Ni; however, at the community level, Pb emerged as the only significant variable in a redundancy analysis. Our results suggest that testate amoebae are sensitive to and may be good bioindicators for heavy metal pollution, especially lead. Further research is needed to understand the causal relationships underlying the observed patterns.