Endemic Collembola, privileged bioindicators of forest management
Endemic Collembola, privileged bioindicators of forest management
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DOI：
10.1016/j.pedobi.2005.10.002
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发表时间：
2006-01-01
期刊：
影响因子：
2.3
通讯作者：
Gers, Charles
中科院分区：
文献类型：
--
作者：
Cassagne, Nathalie;Gauquelin, Thierry;Gers, Charles
我们的研究比较了三个半自然地点(山毛榉森林、山毛榉冷杉森林和冷杉林)和三个管理地点(挪威云杉、山毛榉冷杉和冷杉)的土壤弹尾虫。用Bertese-Tullgren漏斗从总共60个样本中提取弹尾虫，进行物种水平的计数和鉴定。共采集标本7187号，隶属37属51种。人工林与天然林之间差异有统计学意义(t检验，P=0.000)。群落及其种群密度显著降低，半自然林51种，708,498个/m~(-2)，林分36个种，306,042个/m~(-2)。特有成分的物种丰富度和丰富度下降尤为严重(分别有57%和71%出现在受管理的森林中)。这些物种分布范围窄，当地种群数量少，对环境条件的变化具有双重脆弱性。它们对人类干预造成的自然栖息地的丧失非常敏感，因此是对环境压力忍耐度的有用指标。我们强调需要在保护生物多样性的研究中考虑到特有物种，因为它们最有可能灭绝。半天然森林是特有物种的避难所，应该受到保护。(C)2005年爱思唯尔股份有限公司。版权所有。
Our study compared the soil collembolan at three semi-natural sites (a beech forest, a beech-fir forest and a fir stand) and three managed sites (Norway spruce, beech-fir and fir). Collembola were extracted from a total of 60 samples with a Bertese-Tullgren funnel, counted and identified to species level. A total of 7187 specimens, representing 51 species and 37 genera, were collected. There were significant differences between managed and natural forests (t-test, P = 0.000). The communities and their population densities were significantly lower in the managed site: 51 species with 708,498 ind m(-2) in the semi-natural forests to 36 species and 306,042 ind m(-2) in the managed stands. The endemic component suffered a particularly severe decrease in species richness and abundance (57% and 71% tower in the managed forests, respectively). These species with narrow distribution and small local populations are doubly vulnerable to alterations of environmental conditions. They are very sensitive to loss of their natural habitat owing to human intervention and thus represent useful indicators of tolerance to environmental stress. We highlight the need to take endemic species into consideration in studies on the conservation of biodiversity because they are most at risk of extinction. Semi-natural forests are refuges for endemic species and should be protected. (c) 2005 Elsevier GmbH. All rights reserved.