CAPTURE RATES AND COMPOSITION OF INSECT PREY OF THE PITCHER PLANT SARRACENIA-PURPUREA
CAPTURE RATES AND COMPOSITION OF INSECT PREY OF THE PITCHER PLANT SARRACENIA-PURPUREA
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DOI：
10.2307/2426363
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发表时间：
1991-01-01
影响因子：
0.6
通讯作者：
CRESSWELL, JE
中科院分区：
文献类型：
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作者：
CRESSWELL, JE
对 214 个瓶子草瓶的昆虫猎物进行了为期 55 天的监测。 总共回收了 504 只个体猎物，干重为 569.5 毫克。 捕获的个体来自 49 个科和 13 个目，其中大多数个体来自双翅目。 捕虫笼之间的猎物分布极不均匀；超过 50% 的猪笼草什么也没捕获，大约 8% 的猪笼草捕获了 66% 的猎物生物量。 实验操作未能产生捕虫笼密度对猎物捕获率的影响。 事实上，没有发现猎物捕获率存在显着的空间变化。 在捕虫笼孔内结网的蜘蛛在大约 10% 的陷阱日中阻碍了捕虫笼的功能，并且可能严重降低了捕虫笼的成功率。
The insect prey of 214 pitchers of Sarracenia purpurea were monitored for 55 days. A total of 504 individual prey with a dry weight of 569.5 mg were recovered. The catch comprised individuals from 49 families and 13 orders, with most individuals from the Diptera. The distribution of the prey among pitchers was highly uneven; over 50% of pitchers caught nothing and about 8% of the pitchers caught 66% of the prey biomass. Experimental manipulations failed to produce an effect of pitcher density on prey capture rates. Indeed, no significant spatial variation in prey capture rates was found. Spiders that spun webs inside pitcher apertures prevented pitcher function on about 10% of trap days and may have imposed an important reduction on pitcher success.