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首页> 外文期刊>森林総合研究所研究報告 >Buffer zones for placing baited traps in grasslands bordering forests and availability of riparian reserves of trees in grasslands: A preliminary study for dung beetle assemblages in East Kalimantan, Indonesia
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Buffer zones for placing baited traps in grasslands bordering forests and availability of riparian reserves of trees in grasslands: A preliminary study for dung beetle assemblages in East Kalimantan, Indonesia

机译：在与森林接壤的草原上放置诱饵陷阱的缓冲区和草原上河岸树木储备的可利用性：印度尼西亚东加里曼丹省的甲虫组合初步研究

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摘要

Dung beetles are useful indicators of habitat quality in tropical regions. When we evaluate habitat quality with using baited traps that attract insects for a distance, traps need to be placed to limit immigration of insects from outside the study area. To determine the minimum distance from a forest edge into grassland needed to limit immigration of forest dung beetle species, we set baited pitfall traps on transects of 100, 200, and 300 m into grassland from the edge of an Acacia mangium plantationwith a small secondary forest in East Kalimantan. Additionally, to evaluate the availability of riparian reserves of trees along the margins of grasslands as habitat for forest species, we placed traps in a riparian reserve next to the grassland. Sincethe species found to be most abundant in the plantation were not collected in the grassland, we suggested that100 m buffer zone should be sufficient to limit the unwanted capture of forest beetles in baited grassland traps. Moreover, since the species that were abundant in the plantation were also abundant in the riparian reserve, we argued that riparian reserves in grasslands might act as a habitat patch for forest species. Since distance from both forest edge and riparian reserve did not relate to theresult of the ordination of species composition at each trapping location in the grassland, these distances did not generally affect the communities of dung beetles in the grassland.
机译：粪甲虫是热带地区栖息地质量的有用指标。当我们使用诱饵诱集装置诱捕一定距离的昆虫来评估栖息地质量时，需要放置诱集装置以限制昆虫从研究区域外的迁移。为了确定限制林粪甲虫物种迁移所需的从森林边缘到草原的最小距离，我们从相思树人工林的边缘到一个小的次生林，在100、200和300 m的样带上设置了诱饵陷阱，进入草地在东加里曼丹。此外，为了评估沿草原边缘的河岸保护区作为森林物种栖息地的可用性，我们在草地旁的河岸保护区中放置了陷阱。由于发现的人工林中最丰富的物种不是在草地上收集的，因此我们建议100 m的缓冲区应足以限制诱饵草地诱捕器中对甲虫的有害捕获。此外，由于人工林中丰富的物种在河岸保护区中也很丰富，因此我们认为草原的河岸保护区可能是森林物种的栖息地。由于距森林边缘和河岸保护区的距离与草地上每个诱集位置的物种组成排序的结果无关，因此这些距离通常不会影响草地上的甲虫群落。

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