THE EL NINO SOUTHERN OSCILLATION, VARIABLE FRUIT PRODUCTION, AND FAMINE IN A TROPICAL FOREST

THE EL NINO SOUTHERN OSCILLATION, VARIABLE FRUIT PRODUCTION, AND FAMINE IN A TROPICAL FOREST
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厄尔尼诺南方涛动、水果产量波动和热带森林中的饥荒

DOI:
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发表时间:
1999
期刊:
影响因子:
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通讯作者:
S. Paton
S. Paton
中科院分区:
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文献类型:
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作者:
S. Joseph Wright;C. Carrasco;O. Calderón;S. Paton

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我们测试的假设,厄尔尼诺南方涛动影响森林范围内的水果生产,这反过来又限制了水果和granivorous哺乳动物的巴罗科罗拉多岛(BCI),巴拿马。对BCI哺乳动物的观察已经编辑了49年。食果哺乳动物在1931-1932年、1958-1959年、1970-1971年和1993-1994年的9月和1月之间经历了饥荒。最近的饥荒是显而易见的,从11年的记录自然死亡的哺乳动物和2年的人口密度记录。在49年的记录中,每当厄尔尼诺事件发生后出现温和的旱季时,就会发生饥荒。正如随机化检验所证明的那样,这种巧合在统计学上是不可能的。一个2年周期的高,然后低的社区水平的水果生产已经观察到两次BCI时,一个温和的旱季后厄尔尼诺事件。我们使用了260个垃圾陷阱,以监测社区和物种水平的水果生产从1987年1月1日至1996年6月30日。在1999年期间,社区一级的水果产量最大。
We tested the hypothesis that the El Nino Southern Oscillation influences forest-wide fruit production, which, in turn, limits frugivorous and granivorous mammals on Barro Colorado Island (BCI), Panama. Observations of BCI mammals have been compiled for 49 years. Frugivorous mammals experienced famine between September and January in 1931–1932, 1958–1959, 1970–1971, and 1993–1994. The most recent famine is evident from an 11-yr record of natural deaths of mammals and a 2-yr record of population densities. Famine occurred every time a mild dry season followed an El Nino event in the 49-yr record. This coincidence is statistically improbable, as demonstrated by a randomization test. A 2-yr cycle of high, then low community-level fruit production has been observed twice for BCI when a mild dry season followed an El Nino event. We used 260 litter traps to monitor community- and species-level fruit production from 1 January 1987 through 30 June 1996. Community-level fruit production was greatest during the 199...