ABSTRACT Coexistence of competitors may result if resources are sufficiently abundant to render competition unimportant, or if species differ in resource requirements. Detritus type has been shown to affect interspecific competitive outcomes between Aedes albopictus (Skuse) and Aedes aegypti (L.) larvae under controlled conditions. We assessed the relationships among spatial distributions of detritus types, nutrients, and aquatic larvae of these species in nature. We collected mosquitoes, water, and detritus from artificial containers across 24 Florida cemeteries that varied in relative abundances of Ae. aegypti and Ae. albopictus. We measured nutrient content of fine particulate organic matter in water samples as total N, P, and C and ratios of these nutrients. We quantified food availability via a bioassay, raising individual Aedes larvae in the laboratory in standard volumes of field-collected, particulate-containing water from each cemetery. Quantities of detritus types collected in standard containers were significant predictors of nutrients and nutrient ratios. Nutrient abundances were significant predictors of relative abundance of Ae. aegypti, and of larval survival and development by both species in the bioassay. Survival and development of larvae reared in particulate-containing water from sites decreased with decreasing relative abundance of Ae. aegypti. These data suggest that N, P, and C availabilities are determined by detritus inputs to containers and that these nutrients in turn determine the feeding environment encountered by larvae, the intensity of interspecific competition among larvae, and subsequent relative abundances of species at sites. Detritus inputs, nutrients, and food availability thus seem to contribute to distributions of Ae. aegypti and Ae. albopictus in cemetery containers throughout Florida.

中文翻译：

---

竞争容器蚊子的分布取决于碎屑类型、营养比例和食物供应


摘要：如果资源足够丰富，竞争不重要，或者物种对资源的需求不同，则可能会导致竞争者共存。研究表明，在受控条件下，碎屑类型会影响白纹伊蚊 (Skuse) 和埃及伊蚊 (L.) 幼虫之间的种间竞争结果。我们评估了自然界中这些物种的碎屑类型、营养物质和水生幼虫的空间分布之间的关系。我们从佛罗里达州 24 个墓地的人造容器中收集了蚊子、水和碎屑，这些容器中白伊蚊的相对丰度各不相同。埃及伊蚊和伊蚊。白纹伊蚊。我们测量了水样中细颗粒有机物的养分含量，即总 N、P 和 C 以及这些养分的比率。我们通过生物测定量化了食物的供应量，在实验室中用从每个墓地收集的标准体积的含有颗粒的水中饲养个体伊蚊幼虫。标准容器中收集的碎屑类型的数量是营养物和营养物比率的重要预测因素。养分丰度是白藜芦醇相对丰度的重要预测因子。埃及伊蚊，以及生物测定中两个物种的幼虫生存和发育。在含有颗粒物的水中饲养的幼虫的存活和发育随着白伊蚊相对丰度的降低而降低。埃及伊蚊。这些数据表明，氮、磷和碳的有效性是由容器中的碎屑输入决定的，而这些营养物质反过来又决定了幼虫所遇到的摄食环境、幼虫之间种间竞争的强度以及随后在地点物种的相对丰度。因此，碎屑输入、营养物质和食物供应似乎有助于伊蚊的分布。 埃及伊蚊和伊蚊。佛罗里达州各地墓地容器中都有白纹伊蚊。