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首页> 外文期刊>Environmental Conservation >Past cultivation is a factor driving organization of dry grassland ground-active beetle communities
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Past cultivation is a factor driving organization of dry grassland ground-active beetle communities

机译：过去的耕种是导致旱地地面甲虫群落的组织驱动因素

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摘要

The steppes of the Mediterranean Basin, traditionally managed since ancient times, have been drastically degraded by recent human activities, and are a valuable model to study the impact of present and past anthropogenic disturbances. Climate and edaphic constraints and free sheep grazing have contributed for over 6000 years to the development of a steppe unique to France, but similar to many others in the Mediterranean Basin. This steppe is increasingly threatened by both industrialization and cultivation, and formerly-cultivated plots developed less species-rich vegetation than the steppe. Here, sampling with pitfall traps showed that formerly-cultivated plots hosted more diverse beetle assemblages owing to the presence of ruderal plants, which had greater nutritional value and hosted more phytophagous insects, beetles or other groups, enhancing prey diversity. The steppe had a less species-rich assemblage, but included many species typical of arid areas, some of which are threatened. Former disturbances led to the settlement of ubiquitous species, which increased the overall species richness, but decreased the biological value for conservation. Conservationists have to decide whether they would rather maintain beetle species diversity or biological value.
机译：地中海盆地的草原自古以来就被传统管理，最近的人类活动使其严重退化，并且是研究当前和过去人为干扰影响的有价值的模型。 6000多年来，气候和深海气候的限制以及自由放牧为法国特有的草原的发展做出了贡献，但与地中海盆地的许多其他草原相似。该草原受到工业化和种植业的威胁越来越大，而以前耕种的田地比草原拥有更少的物种丰富的植被。在这里，用陷阱陷阱取样表明，以前存在的地块由于存在着具有更高营养价值的鱼植物而生活着更多种类的甲虫，而鱼植物具有更大的营养价值，并拥有更多的食植物昆虫，甲虫或其他物种，从而增强了猎物的多样性。草原的物种种群较少，但包括许多典型的干旱地区物种，其中一些受到威胁。以前的干扰导致无处不在的物种的沉降，这增加了物种的总体丰富度，但降低了保护的生物学价值。保护主义者必须决定他们是否愿意维持甲虫物种的多样性或生物学价值。

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