一項(xiàng)研究發(fā)現(xiàn)，氣候變對溫度和降水量的變化的影響很可能對傳播西尼羅河病毒（WNV）的蚊子產(chǎn)生廣泛的影響，這提示控制這種病毒的公共衛(wèi)生舉措需要采取地方性的而非全球性的視角,。Cory Morin 和Andrew C. Comrie使用一個氣候驅(qū)動的蚊子種群模型模擬了美國南部一種已知能夠傳播西尼羅河病毒（WNV）的蚊子的豐富程度,。這組作者發(fā)現(xiàn)，在氣候變化模型預(yù)測的未來氣候條件下,，許多地方估計(jì)將會遇到有蚊子的季節(jié)的延長,，但是干燥的環(huán)境和極端溫度下蚊子死亡率的增加會導(dǎo)致夏季蚊子種群的減少。然而,，這些變化根據(jù)地方溫度和降水量而有顯著的不同,。例如，夏季蚊子種群減少在南方將最嚴(yán)重,，但是在較北的地區(qū)這種減少幾乎不存在,，在北方，更溫和的溫度和充足的雨會幫助維持蚊子的棲息地,。這組作者說,，這些發(fā)現(xiàn)提示設(shè)計(jì)用于控制病媒蚊子種群的研究必須有地區(qū)針對性才能讓研究的效力最大化。（生物谷 Bioon.com）
生物谷推薦的英文摘要
PNAS doi: 10.1073/pnas.1307135110
Regional and seasonal response of a West Nile virus vector to climate change
Cory W. Morin and Andrew C. Comrie
Climate change will affect the abundance and seasonality of West Nile virus (WNV) vectors, altering the risk of virus transmission to humans. Using downscaled general circulation model output, we calculate a WNV vector's response to climate change across the southern United States using process-based modeling. In the eastern United States, Culex quinquefasciatus response to projected climate change displays a latitudinal and elevational gradient. Projected summer population depressions as a result of increased immature mortality and habitat drying are most severe in the south and almost absent further north; extended spring and fall survival is ubiquitous. Much of California also exhibits a bimodal pattern. Projected onset of mosquito season is delayed in the southwestern United States because of extremely dry and hot spring and summers; however, increased temperature and late summer and fall rains extend the mosquito season. These results are unique in being a broad-scale calculation of the projected impacts of climate change on a WNV vector. The results show that, despite projected widespread future warming, the future seasonal response of C. quinquefasciatus populations across the southern United States will not be homogeneous, and will depend on specific combinations of local and regional conditions.
