Evidence for Reduction of Native Mosquitoes With Increased Expansion of Invasive Ochlerotatus japonicus japonicus (Diptera: Culicidae) in the Northeastern United States

被引:75
作者
Andreadis, Theodore G. [1 ]
Wolfe, Boger J. [1 ]
机构
[1] Connecticut Agr Expt Stn, New Haven, CT 06504 USA
基金
美国农业部;
关键词
Ochlerotatus japonicus japonicus; interspecific competition; rock pools; tires; Ochlerotatus atropalpus; AEDES-JAPONICUS; THEOBALD DIPTERA; LARVAL MOSQUITOS; 1ST OCCURRENCE; ABUNDANCE; ESTABLISHMENT; COMPETITION; DISCOVERY; PREDATION; CHECKLIST;
D O I
10.1603/033.047.0106
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Ochlerotatus japonicus japonicus (Theobald) is an invasive mosquito native to Japan, Korea, and eastern China. The species was first detected in the northeastern United States in 1998 and has rapidly spread throughout much of eastern North America. in addition to used tire casings, Oc. j. japonicus develops in a wide variety of artificial and natural container habitats, especially rock pools along stream beds. In an effort to evaluate the invasion success and impact of Oc. j. japonicus on populations of native container dwelling species, waste tire disposal sites and natural rock pool habitats were sampled for mosquito larvae throughout Connecticut in 2005, and data were compared with results from prior surveys made in 1987 and 1999. Oc. j. japonicus was the predominant species collected at the waste tire disposal sites regardless of surrounding landscape features, accounting for 55.9% of all larvae. A comparison with collections from prior surveys revealed a 90% reduction in the relative abundance of larval populations of Oc. triseriatus (Say) and significant reductions among larval populations of Oc. atropalpus (Coquillett) and Culex restuans Theobald. Oc. j. japonicus was also the most abundant mosquito collected in rock pool habitats, accounting for nearly 80% of all collected larvae, except where water temperatures exceeded 30 degrees C. This was concomitant with significant declines in the relative abundance of Oc. atropalpus and Cx. restuans. We conclude that Oc. j. japonicus is a potentially effective competitor in rock pool and tire environments and may be responsible for reducing populations of several native species occupying these habitats through interspecific competition for limited resources. The exclusion of Oc. j. japonicus from warm water pools further suggests that a temperature barrier may exist for Oc. j. japonicus and that populations may not be able to colonize southern regions of the United States with relatively high summer temperatures.
引用
收藏
页码:43 / 52
页数:10
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