Dispersal failure contributes to plant losses in NW Europe
Dispersal failure contributes to plant losses in NW Europe
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DOI：
10.1111/j.1461-0248.2008.01261.x
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发表时间：
2009-01-01
期刊：
影响因子：
8.8
通讯作者：
van Groenendael, Jan M.
中科院分区：
文献类型：
--
作者：
Ozinga, Wim A.;Roemermann, Christine;van Groenendael, Jan M.
西北欧许多植物物种的持续减少表明，改善栖息地质量的传统保护措施虽然有效，但不足以阻止多样性的丧失。利用最近的数据库，我们首次表明，物种对不同传播媒介的适应差异，加上这些媒介可获得性的变化，对解释20世纪西北欧植物多样性的丧失起到了重要作用。水或毛皮辅助扩散的物种在减少的物种中比例过高，而其他物种(风或鸟类辅助扩散)的比例较低。我们的分析表明，与更普遍接受的富营养化和相关的生态位过程的影响相比，由退化的扩散基础设施造成的“定居赤字”在解释植物多样性损失方面的重要性不亚于其他因素。我们的发现呼吁采取措施，旨在恢复整个地区的扩散基础设施，并超越当前的保护做法。
The ongoing decline of many plant species in Northwest Europe indicates that traditional conservation measures to improve the habitat quality, although useful, are not enough to halt diversity losses. Using recent databases, we show for the first time that differences between species in adaptations to various dispersal vectors, in combination with changes in the availability of these vectors, contribute significantly to explaining losses in plant diversity in Northwest Europe in the 20th century. Species with water- or fur-assisted dispersal are over-represented among declining species, while others (wind- or bird-assisted dispersal) are under-represented. Our analysis indicates that the 'colonization deficit' due to a degraded dispersal infrastructure is no less important in explaining plant diversity losses than the more commonly accepted effect of eutrophication and associated niche-based processes. Our findings call for measures that aim to restore the dispersal infrastructure across entire regions and that go beyond current conservation practices.