Influence of farmland abandonment on the species composition of wetland ground beetles in Kushiro, Japan
Influence of farmland abandonment on the species composition of wetland ground beetles in Kushiro, Japan
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DOI：
10.1016/j.agee.2017.07.027
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
S. Yamanaka;T. Akasaka;Y. Yabuhara;F. Nakamura
中科院分区：
文献类型：
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作者：
S. Yamanaka;T. Akasaka;Y. Yabuhara;F. Nakamura
在许多发达地区，人口减少的趋势导致废弃农田面积的增加，这可能为过去将湿地转化为农业而濒临灭绝的物种提供另一个栖息地。此外，各种时空因素（景观结构、当地生境质量和撂荒年限）也会影响撂荒农田的物种组成。本研究通过研究撂荒对湿地地甲物种组成的时空影响，探讨撂荒对湿地地甲物种栖息地的保护作用。本研究首先比较了日本北海道东部钏路地区四种土地利用方式（草地、湿地、新建和废弃农田）的地面甲虫群落。在此基础上，研究了影响撂荒农田与湿地物种组成差异的因素。研究发现，撂荒农田湿地物种组成与湿地的相似性大于与草地的相似性。撂荒农田土壤湿度与土地撂荒年龄呈正相关，撂荒农田与湿地物种组成差异与土壤湿度和周边湿地面积均呈负相关。我们的研究结果表明，废弃的农田可以作为湿地地面甲虫的替代栖息地。在废弃农田中保持高水平的土壤湿度并保护周围的湿地可能是恢复这些物种自然栖息地的有效策略。
Depopulation trends in many developed regions are resulting in an increase in areas of abandoned farmland, which could provide an alternative habitat for species endangered by past conversion of wetlands for agriculture. Additionally, various spatial and temporal factors (landscape structure, local habitat quality, and abandonment age) could influence species composition in abandoned farmland. In this study, we explored the spatio-temporal effects of land abandonment on the species composition of wetland ground beetles (Coleoptera: Carabidae) to examine whether abandoned farmland can contribute to conserve wetland species’ habitats. We first compared ground beetle assemblages among four land uses (grassland, wetland, and newly and previously abandoned farmland) in the Kushiro region, eastern Hokkaido, Japan. We then examined the factors influencing differences in wetland species composition between abandoned farmland and wetland. We found that the composition of wetland species in abandoned farmland was more similar to that of wetland than that of grassland. Our results also showed that soil moisture in abandoned farmland was positively related to the land abandonment age and that differences in wetland species composition between abandoned farmland and wetland were negatively related to both soil moisture and surrounding wetland area. Our findings suggest that abandoned farmland can serve as an alternative habitat for wetland ground beetles. Maintaining a high level of soil moisture in abandoned farmland and conserving the surrounding wetland could be an effective strategy for restoring natural habitats for these species.