EXTINCTION AND RECOLONIZATION OF LOCAL-POPULATIONS ON A GROWING SHIELD-VOLCANO
EXTINCTION AND RECOLONIZATION OF LOCAL-POPULATIONS ON A GROWING SHIELD-VOLCANO
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DOI：
10.1073/pnas.87.18.7055
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发表时间：
1990-09-01
影响因子：
11.1
通讯作者：
CRADDOCK, EM
中科院分区：
文献类型：
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作者：
CARSON, HL;LOCKWOOD, JP;CRADDOCK, EM
火山活动导致夏威夷冒纳罗亚火山和基拉韦厄火山的地表被新的熔岩流掩埋，流速高达每1000年90%。这些火山上的当地生物种群不断地灭绝；特定物种的生存需要年轻种群的殖民化。夏威夷特有物种果蝇（Drosophila silvestris）的某些种群就是这种事件的缩影。在过去的2100年里，海拔梯度底部的当地居民被两次爆炸性的火山喷发摧毁了。自然再殖民化恢复了种群，除了一个年轻种群在基因上与海拔不一致。
Volcanic action has resulted in the burial of the surfaces on Mauna Loa and Kilauea, Hawaii, by new lava flows at rates at high as 90% per 1000 years. Local populations of organisms on such volcanoes are continually being exterminated; survival of the specifies requires colonization of younger flows. Certain populations of the endemic Hawaiian species Drosophila silvestris exemplify such events in microcosm. Local populations at the base of an altitudinal cline were destroyed by two explosive eruptions within the last 2100 years. Natural recolonization restored the cline except for one young population that is genetically discordant with altitude.