Drought-induced mosquito outbreaks in wetlands

被引:209
作者
Chase, JM
Knight, TM
机构
[1] Washington Univ, Dept Biol, St Louis, MO 63130 USA
[2] Univ Florida, Dept Zool, Gainesville, FL 32611 USA
关键词
competition; drought; food web; mosquito; outbreak; precipitation; predation;
D O I
10.1046/j.1461-0248.2003.00533.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Mosquitoes are not only a nuisance, but also vector many important human and animal diseases. Here, in opposition with the dogma that increased precipitation predicts mosquito abundance, we hypothesize that mosquitoes should show population outbreaks after drought years. Specifically, we suggest that in wetlands that never dry (Permanent), predators limit mosquito abundance, whereas in wetlands that dry yearly (temporary), competitors that are well adapted to predictable drying, limit mosquito abundance. However, in wetlands that dry only during drought years (semi-permanent), mosquito predators and competitors are eliminated and must recolonize following a drought, and the abundance of wetland mosquitoes can skyrocket. We present supportive evidence for this hypothesis from surveys of natural wetlands and from a controlled mesocosm experiment. We conclude that this framework may provide a reliable way to predict and prepare for year-to-year variation in mosquito abundances at large spatial scales.
引用
收藏
页码:1017 / 1024
页数:8
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