Hotspots and richness pattern of grasshopper species in cultural landscapes
Hotspots and richness pattern of grasshopper species in cultural landscapes
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DOI：
10.1007/s10531-006-9089-7
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发表时间：
2007-05
影响因子：
3.4
通讯作者：
Claude E. Steck;M. Bürgi;T. Coch;P. Duelli
中科院分区：
文献类型：
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作者：
Claude E. Steck;M. Bürgi;T. Coch;P. Duelli
热点办法能否成功保护生物多样性取决于空间尺度和所使用的指示物种。在这项研究中，我们在1公顷的分辨率上调查了瑞士的蝗虫物种丰富度，总共包括111种。我们比较了常见蝗虫物种和濒危蝗虫物种在整个蝗虫物种丰富度中的代表性，并评估了热点方法在蝗虫保护方面的效率。常见种类数和濒危种类数较好地反映了蝗虫物种丰富度的总体格局。为了评估不同热点保护方法的效率，我们比较了常见物种的热点、濒危物种的热点(稀有热点)和所有蝗虫物种的热点(丰富度热点)。在这些热点类型中，丰富度热点不仅以最常见的蝗虫物种为特征，而且甚至比稀有热点包含更多的濒危物种。稀有热点和常见物种热点的组合比热点类型的其他组合具有更多的物种。然而，与单一热点方法相比，组合两种热点类型的收益较低(最大。3种)。约24%的物种没有出现在任何热点地区。这些蝗虫物种需要针对特定物种的行动计划。由于珍稀热点位于受景观变化影响较大的地区，未来珍稀热点的物种丰富度可能会下降。我们的结论是，对于蝗虫来说，1公顷尺度上的热点方法可能是保护高比例物种丰富度的有效方式。
The success of the hotspot approach for biodiversity conservation depends on the spatial scale and the indicator species used. In this study, we investigated grasshopper species richness in Switzerland at a 1 ha resolution including a total of 111 species. We compared the representativeness of common and of endangered grasshopper species for the overall grasshopper species richness and we assessed the efficiency of the hotspot approach for grasshopper conservation. The pattern of overall grasshopper species richness was well represented by both the number of common and the number of endangered grasshopper species. For evaluating the efficiency of different hotspot approaches for conservation, we compared hotspots of common species, hotspots of endangered species (rarity hotspots), and hotspots of all grasshopper species (richness hotspots). Among these hotspot types, richness hotspots not only featured most common grasshopper species, but they even contained more endangered species than the rarity hotspots. The combination of rarity hotspots and hotspots of common species featured more species than the other combinations of hotspot types. However, the gain of combining two hotspot types compared to the single-hotspot approach was low (max. 3 species). About 24% of the species were not contained in any of the hotspots. These grasshopper species require species-specific action plans. As rarity hotspots were located in areas that are rather strongly affected by landscape change, species richness in rarity hotspots may decrease in the future. We conclude that, for grasshoppers, the hotspot approach on the 1 ha scale can be an effective way to conserve a high proportion of species richness.