Department of Life Sciences, Center for Biological Control, Ben-Gurion University of the Negev, P.O. Box 653, 8410501, Beer-Sheva, Israel,
Oecologia. 2014 Jun;175(2):565-75. doi: 10.1007/s00442-014-2930-x. Epub 2014 Mar 26.
Oviposition habitat selection (OHS) is increasingly being recognized as playing a large role in explaining mosquito distributions and community assemblages. Most studies have assessed the role of single factors affecting OHS, while in nature, oviposition patterns are most likely explained by multiple, interacting biotic and abiotic factors. Determining how various factors interact to affect OHS is important for understanding metapopulation and metacommunity dynamics. We investigated the individual and interactive effects of three water salinities (0, 15 and 30 p.p.t. NaCl added) and the aquatic predator Anisops debilis Perplexa (Hemiptera: Notonectidae) on OHS and larval performance of the mosquitoes Ochlerotatus caspius Pallas and Culiseta longiareolata Macquart (Diptera: Culicidae) in outdoor-artificial-pool and laboratory experiments. C. longiareolata inhabited only freshwater pools, strongly avoided pools containing A. debilis, and larvae experienced lower survival in the presence of A. debilis. Salinity concentration interacted strongly with the predator in affecting OHS and larval survival of O. caspius; oviposition increased with increasing salinity in the absence of the predator and decreased with increasing salinity in the presence of the predator. O. caspius larval survival in predator-free pools was lowest in freshwater and highest at intermediate salinity. In predator pools, survival was highest at high salinity, where predation rate was shown to be lowest in the laboratory. Our results highlight that assessing the role of single factors in affecting mosquito distributions can be misleading. Instead, multiple factors may interact to affect oviposition patterns and larval performance.
产卵栖息地选择（OHS）越来越被认为在解释蚊子分布和群落组合方面起着重要作用。大多数研究评估了影响 OHS 的单一因素的作用，而在自然界中，产卵模式很可能是由多个相互作用的生物和非生物因素解释的。确定各种因素如何相互作用以影响 OHS 对于理解集合种群和集合群落动态非常重要。我们在户外人工池和实验室实验中研究了三种水盐度（添加 0、15 和 30 p.p.t. NaCl）和水生捕食者 Anisops debilis Perplexa（半翅目：Notonectidae）对蚊子 Ochlerotatus caspius Pallas 和 Culiseta longiareolata Macquart（双翅目：Culicidae）的 OHS 和幼虫性能的单独和交互作用。C. longiareolata 仅栖息于淡水池中，强烈避免含有 A. debilis 的水池，并且幼虫在存在 A. debilis 时的存活率较低。盐度浓度与捕食者强烈相互作用，影响 O. caspius 的 OHS 和幼虫存活率；在没有捕食者的情况下，随着盐度的增加产卵增加，而在存在捕食者的情况下，随着盐度的增加产卵减少。在没有捕食者的情况下，O. caspius 幼虫在淡水池中生存能力最低，在中等盐度下生存能力最高。在捕食者池中，生存能力在高盐度下最高，在实验室中表明捕食率最低。我们的结果强调，评估单一因素在影响蚊子分布方面的作用可能会产生误导。相反，多个因素可能相互作用影响产卵模式和幼虫性能。
