Effect of Connectivity Between Restoration Meadows on Invertebrates with Contrasting Dispersal Abilities
Effect of Connectivity Between Restoration Meadows on Invertebrates with Contrasting Dispersal Abilities
复制标题
恢复草甸之间的连通性对具有对比分散能力的无脊椎动物的影响
DOI：
10.1111/j.1526-100x.2010.00737.x
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发表时间：
2011
影响因子：
3.2
通讯作者：
B. Schmid
中科院分区：
文献类型：
--
作者：
E. Knop;F. Herzog;B. Schmid
恢复农田生物多样性的方案往往是在田间尺度上实施的，而没有考虑景观尺度的因素。在瑞士一个以草原为主的地区，我们测试了景观因子栖息地连通性是否可能提高草地农业环境计划的有效性。我们调查了两个指标组与对比的传播能力，陆生蜗牛和直翅目昆虫（蝗虫）。我们调查了27个广泛管理的草地分为9个街区。每个区块由三块结构连通性和土地利用历史不同的草地组成：其中一块草地代表长期、半自然管理的石灰质草地，被认为是潜在的源栖息地。另外两个草地是4-6年前创建的恢复草地。其中一个恢复草地与潜在源草地相邻，另一个与潜在源草地隔离，潜在源草地中两个无脊椎动物类群的物种多样性显著高于恢复草地。这两个类群的社区更类似于潜在的源草甸在连接比孤立的恢复草甸。隔离对不良传播者的物种多样性有负面影响，而对良好传播者的物种多样性没有影响。然而，就个别物种的出现而言，即使是良好的传播者也会受到隔离的负面影响。我们的结论是，恢复草甸的结构连接到潜在的源栖息地是重要的，增加恢复成功的无脊椎动物群落，特别是那些包含有限的传播能力的物种。
Schemes to restore farmland biodiversity are often implemented at field scale whereas landscape scale factors are not considered. In a grassland dominated region in Switzerland, we tested whether the landscape factor habitat connectivity could possibly increase the effectiveness of an agri‐environment scheme for meadows. We investigated two indicator groups with contrasting dispersal abilities, land snails and orthopterans (grasshoppers). We investigated 27 extensively managed meadows grouped into nine blocks. Each block consisted of three meadows differing in structural connectivity and land use history: one meadow represented long‐term, semi‐naturally managed calcareous grassland that was considered as the potential source habitat. The other two meadows were restoration meadows, created 4–6 years ago. One of these restoration meadows was adjacent to the potential source meadow, the other isolated from it. We found a significantly higher species diversity of both invertebrate groups in the potential source meadows compared to the restoration meadows. Communities of both taxa were more similar to the potential source meadows in connected than in isolated restoration meadows. The species diversity of bad dispersers was negatively affected by isolation, but the diversity of good dispersers was unaffected. With respect to individual species occurrences, however, even good dispersers were negatively affected by isolation. We conclude that structural connectivity of restoration meadows to potential source habitats is important for increasing the restoration success of invertebrate communities, particularly of those containing species with limited dispersal abilities.