EFFECTS OF FOREST FRAGMENTATION ON DUNG AND CARRION BEETLE COMMUNITIES IN CENTRAL AMAZONIA
EFFECTS OF FOREST FRAGMENTATION ON DUNG AND CARRION BEETLE COMMUNITIES IN CENTRAL AMAZONIA
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DOI：
10.2307/1938106
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发表时间：
1989-12-01
期刊：
影响因子：
4.8
通讯作者：
KLEIN, BC
中科院分区：
文献类型：
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作者：
KLEIN, BC
这项研究是第一批记录热带森林片断化对昆虫影响的研究之一，研究表明，1公顷和10公顷森林片断中的粪便和腐肉甲虫群落与邻近森林中的不同，尽管这些片断被隔离的生态时间很短(2-6年)。在巴西马瑙斯以北80公里处最小生态系统临界大小的生态系统研究地点，在288个陷阱陷阱日内，我捕获了15属55种物种。诱捕天数平均分配给三个1公顷的林区、三个10公顷的林区、三个砍伐完毕的林区和三个毗邻的林区。从将森林碎片与完整森林分开的砍伐区域采集的陷阱样本表明，甲虫很少从完整森林迁徙成碎片。随着二次增长的入侵，明确减记带来的明显障碍也随之减弱。除海龙属的4种外，所有种均在林区比林地更常见。在以砍伐方式捕获的717只个体中，巨嘴龙占了97%，从未在毗邻的森林或10公顷的碎片中被捕获。与可比的完整林区相比，森林碎片的物种更少，种群更稀少，贝类更小。粪便和腐肉甲虫群落的变化有助于解释粪便分解成1公顷碎片的低速率。因此，森林碎片化不仅改变了粪便和腐烂甲虫动物群，其影响还影响到其他相关的社区和生态系统过程。
This study, one of the first to document the effects of forest fragmentation on insects in the tropics, showed that dung and carrion beetle communities in 1-ha and 10-ha forest fragments differed from those in contiguous forest, even though the fragments had been isolated by < 350 m for an ecologically short time (2-6 yr). During 288 pitfall trap days at the Minimum Critical Size of Ecosystems study site 80 km north of Manaus, Brazil, I captured 55 species in 15 genera. Trap days were divided equally between three 1-ha, three 10-ha, three clear-cut, and three contiguous forest areas. Pitfall samples from clear-cut areas separating forest fragments from intact forest indicated that beetles rarely moved from intact forest into fragments. The apparent barrier imposed by clearcuts diminished with the invasion of second growth. Except for the four species in the genus Glaphyrocanthon, all species were found more frequently in forested areas than in clearcuts. Glaphyrocanthon constituted 97% of the 717 individuals captured in clearcuts and was never captured in contiguous forest or 10-ha fragments. Forest fragments had fewer species, sparser populations, and smaller bettles than comparable intact forest areas. The changes in dung and carrion bettle communities help explain the low rates at which dung decomposed in 1-ha fragments. Thus, forest fragmentation not only changes the dung and carrion beetle fauna; its effects ramify through other related community and ecosystem processes, as well.