Please use this identifier to cite or link to this item: https://doi.org/10.1017/S0266467411000629
Title: Cross-habitat predation in Nepenthes gracilis: The red crab spider Misumenops nepenthicola influences abundance of pitcher dipteran larvae
Authors: Ling Chua, T.J.
Min Lim, M.L. 
Keywords: crab spiders
Culex
Endonepenthia schuitemakeri
Lestodiplosis
Misumenops nepenthicola
Nepenthes gracilis
phytotelmata
predation
Thomisus nepenthiphilus
Tripteriodes
Issue Date: Jan-2012
Citation: Ling Chua, T.J., Min Lim, M.L. (2012-01). Cross-habitat predation in Nepenthes gracilis: The red crab spider Misumenops nepenthicola influences abundance of pitcher dipteran larvae. Journal of Tropical Ecology 28 (1) : 97-104. ScholarBank@NUS Repository. https://doi.org/10.1017/S0266467411000629
Abstract: Phytotelmata (plant-held waters) are useful ecological models for studying predator-prey interactions. However, the ability of terrestrial predators to influence organism abundance within phytotelmata remains poorly studied. We investigated the predation of two pitcher-dwelling spiders, the red crab spider Misumenops nepenthicola and the yellow crab spider Thomisus nepenthiphilus (Araneae: Thomisidae) on dipteran larval abundance by manipulating their presence in the pitcher Nepenthes gracilis. Lower abundance in the larvae of the mosquito Tripteriodes spp. and increased spider mass were recorded after M. nepenthicola was introduced into laboratory-maintained pitchers (n = 10); T. nepenthiphilus did not affect larval abundance and a decrease in spider mass was recorded. Further investigations on two other dipteran larval species, the scuttle fly Endonepenthia schuitemakeri and gall midges Lestodiplosis spp., reported reduced numbers with the introduction of M. nepenthicola. We further tested this predation on dipteran larval abundance by its introduction, removal, and re-introduction to pitchers in the field (n = 42) over 1 mo. The spider's absence and presence significantly influenced larval numbers: all four dipteran species reported a significant decrease in numbers after M. nepenthicola was introduced. These results are one of the first to demonstrate the influence of a terrestrial phytotelm forager on the abundance of pitcher organisms via direct predation, reiterating the ecological importance of terrestrial phytotelm predators on phytotelm community structure and dynamics. © Copyright Cambridge University Press 2011.
Source Title: Journal of Tropical Ecology
URI: http://scholarbank.nus.edu.sg/handle/10635/100352
ISSN: 02664674
DOI: 10.1017/S0266467411000629
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