Spatial interaction between spiders and prey insects: horizontal and vertical distribution in a paddy field
Spatial interaction between spiders and prey insects: horizontal and vertical distribution in a paddy field
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蜘蛛和被捕食昆虫之间的空间相互作用：稻田中的水平和垂直分布
DOI：
10.2476/asjaa.53.75
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Koichi Tanaka
中科院分区：
文献类型：
--
作者：
K. Murata;Koichi Tanaka
2001年和2003年，我们调查了熊本县阿索的稻田蜘蛛及其捕食昆虫的数量。蜘蛛的优势种为拟环豹蛛、肖峭蛛（Tetragnathasp.）优势捕食昆虫包括非害虫摇蚊和水稻害虫白背飞虱和黑尾叶蝉。研究了优势种在水稻植株上的垂直分布和稻田内的水平分布。Sogatella furcifera和C. kurilensis多分布于水稻植株的下部，0-10 cm高度，有时也分布于上部。拟环纹豹蛛在0和0-5 cm处的栖息地明显低于这两种豹蛛。另一方面，N.从下到上观察到五头环。在26个1 × 1 m的样方中调查了蜘蛛和捕食昆虫的数量，并利用Iwao（1977）的ω指数分析了它们之间的空间重叠程度。所有蜘蛛和摇蚊之间以及C. kurilensis和S. furcifera。这些结果表明，摇蚊是蜘蛛和C. kurilensis是稻飞虱的有效捕食者，但该蜘蛛尚未被视为重要的捕食者。
We surveyed the populations of spiders and their prey insects in a paddy field under sustainable cultivation in Aso, Kumamoto Prefecture in 2001 and 2003. Dominant species of spiders were Pardosa pseudoannulata, Tetragnatha sp. (certainly T. maxillosa) and Clubiona kurilensis and dominant prey insects included a non-pest, i.e. chironomids, and rice pests, i.e. Sogatella furcifera and Nephotettix cincticeps. We investigated the spatial distribution of the dominant species involving the vertical distribution on rice plants and the horizontal distribution within a paddy field. Sogatella furcifera and C. kurilensis were mostly located at lower parts of rice plants, 0-10 cm high, and sometimes at the upper parts. Pardosa pseudoannulata inhabited significantly lower parts, 0 and 0-5 cm, than the two species. On the other hand, N. cincticeps was observed from lower to upper parts. We surveyed the number of spiders and prey insects in 26 quadrats of 1 × 1 m and analyzed the degree of spatial overlapping between them using the Iwao's (1977) ω index. High values of ω were obtained between all spiders and chironomids and between C. kurilensis and S. furcifera. These results suggest that chironomids are important prey for spiders and C. kurilensis is an effective predator of rice planthoppers though this spider has not been regarded as an important predator.