Habitat patch size modulates terrestrial mammal activity patterns in Amazonian forest fragments
Habitat patch size modulates terrestrial mammal activity patterns in Amazonian forest fragments
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DOI：
10.1644/09-mamm-a-199.1
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发表时间：
2010-06-16
影响因子：
1.7
通讯作者：
Peres, Carlos A.
中科院分区：
文献类型：
--
作者：
Norris, Darren;Michalski, Fernanda;Peres, Carlos A.
了解环境变化如何影响生物体的行为是生态理解和物种保护的核心。我们用相机陷阱监测活动的昼夜变化3无处不在的陆地哺乳动物在新热带森林-九带犰狳（Dasypus novemcinctus），常见的负鼠（Didelphis marsupialis），红腰刺鼠（Dasyprocta leporina）-在巴西亚马逊河南部的一个支离破碎的森林景观。分布在21个森林斑块（大小从2到14,480公顷不等）和2个未受干扰的连续森林地区的3,086个相机陷阱日的结果被用来测试一系列非生物和森林干扰变量对物种活动的影响。信息理论分析揭示了显着的预测的时间分布的活动，物种之间的变化。栖息地破碎化的影响活动的两个夜间物种，但栖息地斑块面积的影响取决于干扰变量的共同负鼠的相互作用。在所调查的3个种中，D. novemcinctus表现出最大的变化，在活动有关的森林斑块大小。在森林面积大于1,000公顷的地区，犰狳严格地在夜间活动，而它们的觅食活动则转变为一种cathemeral模式，在较小的森林斑块中，白天记录到的所有照片中有60%（
Understanding how environmental change influences the behavior of organisms is central for both ecological understanding and species conservation. We used camera traps to monitor the diurnal variation in activity of 3 ubiquitous terrestrial mammals in neotropical forests-nine-banded armadillos (Dasypus novemcinctus), common opossums (Didelphis marsupialis), and red-rumped agoutis (Dasyprocta leporina)-across a fragmented forest landscape of the southern Brazilian Amazon. Results from a total of 3,086 camera-trap days distributed across 21 forest patches (ranging in size from 2 to 14,480 ha) and 2 undisturbed continuous forest areas were used to test the effects of a series of abiotic and forest disturbance variables on species activity. An information theoretic analysis revealed significant predictors of the temporal distribution of activity that varied among species. Habitat fragmentation affected the activity of both nocturnal species, but effects of habitat patch area depended on interactions with disturbance variables for the common opossum. Of the 3 species investigated, D. novemcinctus exhibited the greatest variation in activity in relation to forest patch size. Armadillos were strictly nocturnal in forest areas >1,000 ha, whereas their foraging activity switched to a cathemeral pattern, with up to 60% of all photos recorded during the day in smaller forest patches (