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Effect of landscape modification on primate assemblages of the Magdalena River Valley, Colombia

机译：景观改性对哥伦比亚玛格丽娜河谷灵长类动物组装的影响

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摘要

Population and community dynamics are affected by local landscape disturbances, and the answer of each species to these changes could differentially affect species survival. Natural land cover in the Magdalena River valley, Colombia, has been reduced by almost 70 % and fragmented. There inhabit isolated and reduced populations of Alouatta seniculus, Ateles hybridus, Cebus versicolor, and Saguinus leucopus (Primates). To understand the effect of fragmentation over these species, the relationship between altitude, landscape and class metrics, and plant structure and diversity with the population density of these four primates in 20 localities were assessed. Additionally, the relationship between the density of A. hybridus, assumed as a better competitor, and the density of the other primates was assessed. Mean shape index was the most related variable and affected positively the density of A. hybridus, C. versicolor, and S. leucopus and negatively that of A. seniculus. Weight class index was the second more important variable, the four primates increased their density where more mature is the plant cover. Diameter at breast height was positively related with the density of A. hybridus and C. versicolor, negatively related for A. seniculus and not related to S. leucopus density. Tree density was related negatively with the density of A. seniculus and positively with S. leucopus. A. hybridus was related to the density of the other primates, positively to A. seniculus and negatively to the other two species.
机译：人口和社区动态受到当地景观障碍的影响，每种物种对这些变化的答案可能会影响物种生存。哥伦比亚马格达莱纳河河谷的自然陆地覆盖率已经减少了近70％和碎片。居住孤立和减少阿努特塔森塞，阿塔尔斯杂交，肠果葡萄球菌和仙一素的leucopus（灵长类动物）的群体。为了了解这些物种对碎片化的影响，评估了20个地区的海拔，景观和阶级度量和植物结构和植物结构和多样性。另外，评估A. hybridus的密度与其他灵长类动物的密度之间的关系。平均形状指数是最相关的变量，并且影响了A. hybridus，C. versicolor和S. leucopus的密度并对A. eniculus的密度产生影响。重量类指数是第二个更重要的变量，四个灵长类动物增加了它们的密度，其中更成熟是植物覆盖。乳房高度的直径与A. hybridus和C. versicolor的密度呈正相关，对A脱肠呈负相关，与S. leucopus密度无关。树密度与A.脱肠的密度呈负面相关。 A. Hybridus与其他灵长类动物的密度有关，对A.脱肠阳性和对另外两个物种的负面影响。

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