Connectivity maintain mammal assemblages functional diversity within agricultural and fragmented landscapes
Connectivity maintain mammal assemblages functional diversity within agricultural and fragmented landscapes
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连通性维持了农业和支离破碎的景观中哺乳动物群落的功能多样性
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. G. Rodrigues
中科院分区：
文献类型：
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作者：
M. Magioli;K. Ferraz;E. Setz;A. Percequillo;M. Rondon;V. V. Kuhnen;Mariana Cristina da Silva Canhoto;Karen Evelyn Almeida dos Santos;C. Z. Kanda;Gabriela de Lima Fregonezi;Helena Alves do Prado;Mitra Katherina Ferreira;M. Ribeiro;P. M. S. Villela;L. Coutinho;M. G. Rodrigues
尽管哺乳动物研究取得了重大进展，但在农业和破碎景观中哺乳动物物种的分布，组成和功能作用方面存在知识空白。此外，人们还缺乏关于哪些因素影响农业生态系统中哺乳动物群落的知识。因此，本研究的目的是估计森林覆盖，功能连接，排水和甘蔗的数量对解释陆地哺乳动物的功能多样性的贡献。我们在巴西东南部的大西洋森林-塞拉多交错带的农业和破碎化景观中的陆生哺乳动物的库存，评估了哺乳动物组合的功能多样性，并提出了在景观水平上的保护策略。从2011年9月至2012年8月，通过以下互补方法的组合进行数据收集：主动搜索;诱捕站;粪便样本的收集，通过毛发角质层和粪便DNA分析进行鉴定;以及文献数据。功能多样性（FD）的计算使用一组生态性状，包括体重，运动形式，行为和饮食特征，以及物种的环境敏感性。赤池信息准则被用来比较广义线性模型之间的FD值和景观指标。我们的研究结果揭示了一个令人惊讶的洞察力所发挥的作用，农业和破碎的景观，仍然保持令人印象深刻的高生物多样性水平和有意义的生态功能，表明一些阻力的物种的压力，从农业矩阵和推进城市化。农业和破碎景观中哺乳动物物种的生态功能量与原始地区和保存较好的景观相似。功能连接性（评估物种能够跨越200 m基质的面积）是最合理的模型（wAICc = 0.873）。因此，我们的结论是，提高功能连接保证高FD值，我们证明了保持和恢复这些景观中的物种保护和维护种群的片段补丁之间的结构连接的重要性。
Despite major advances in mammal research, there are knowledge gaps regarding distribution, composition, and the functional role of mammal species within agricultural and fragmented landscapes. Also, there is a lack of knowledge about which factors influence mammal assemblages within agricultural ecosystems. Therefore, this study aimed to estimate the contribution of forest cover, functional connectivity, drainage, and amount of sugar cane toward explaining the functional diversity of terrestrial mammals. We made an inventory of terrestrial mammals in an agricultural and fragmented landscape in an Atlantic Forest-Cerrado ecotone in southeastern Brazil, assessed the functional diversity of mammal assemblages, and proposed conservation strategies at the landscape level. Data collection occurred from September/2011 to August/2012 through a combination of complementary methods: active search; trapping stations; collection of fecal samples, which were identified by hair cuticle and fecal DNA analysis; and data from the literature. Functional diversity (FD) was calculated using a set of ecological traits including body mass, locomotion form, behavioral and dietary traits, and the environmental sensitivity of species. Akaike information criterion was used to compare generalized linear models between FD values and landscape metrics. Our results reveal a surprising insight about the role exerted by agricultural and fragmented landscapes, which still sustain impressively high biodiversity levels and a meaningful amount of ecological functions, indicating some resistance of species to pressure from the agricultural matrix and advancing urbanization. The amount of ecological functions performed by mammal species within agricultural and fragmented landscapes was similar to pristine areas and more preserved landscapes. Functional connectivity (amount of area assessed for species able to cross 200 m of matrix) was the most plausible model (wAICc = 0.873). Thus, we concluded that improving functional connectivity guarantees high FD values, and we demonstrate the importance of maintaining and restoring structural connections between fragment patches within these landscapes for species conservation and the maintenance of populations over time.