Correlates of Recent Declines of Rodents in Northern and Southern Australia: Habitat Structure Is Critical.
Correlates of Recent Declines of Rodents in Northern and Southern Australia: Habitat Structure Is Critical.
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北部北部和南部啮齿动物最近下降的相关性：栖息地结构至关重要。
DOI：
10.1371/journal.pone.0130626
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Kutt A
中科院分区：
文献类型：
--
作者：
Lawes MJ;Fisher DO;Johnson CN;Blomberg SP;Frank AS;Fritz SA;McCallum H;VanDerWal J;Abbott BN;Legge S;Letnic M;Thomas CR;Thurgate N;Fisher A;Gordon IJ;Kutt A
在过去的200年里，澳大利亚经历了本土啮齿动物物种的急剧下降和灭绝，特别是在澳大利亚南部。在澳大利亚北方的热带稀树草原，仅在最近几十年才出现显著下降。这些下降的开始较晚，表明原因可能与南部早先的下降不同。我们研究潜在的区域影响（北方与澳大利亚南部）的生物和生态相关的范围内下降，澳大利亚啮齿动物。我们证明，啮齿动物的下降一直在南方比在热带北部，强烈影响的繁殖，并始终更大的物种栖息在相对开放或植被稀疏的栖息地。与有袋动物不同，有些物种的体型比啮齿动物大得多，体重不是啮齿动物下降的重要预测因素。所有澳大利亚啮齿动物物种都在猫（整个大陆）和红狐（南部）的猎物大小范围内。相反的假设，哺乳动物的下降直接关系到生态系统的生产力（年降雨量），我们的研究结果是一致的假设，干扰，如火灾和放牧，发生在非雨林栖息地，并删除覆盖用于住房，筑巢和觅食的啮齿动物，增加捕食风险。我们同意引入保护管理的呼吁，限制火灾的规模和强度，增加火灾斑块，并减少适合啮齿动物的生态尺度放牧的影响。迫切需要控制野生掠食者，甚至在植被相对稀疏的栖息地建立无掠食者保护区，以确保啮齿动物物种的生存，特别是在澳大利亚北方，那里的下降还没有南方那么严重。
Australia has experienced dramatic declines and extinctions of its native rodent species over the last 200 years, particularly in southern Australia. In the tropical savanna of northern Australia significant declines have occurred only in recent decades. The later onset of these declines suggests that the causes may differ from earlier declines in the south. We examine potential regional effects (northern versus southern Australia) on biological and ecological correlates of range decline in Australian rodents. We demonstrate that rodent declines have been greater in the south than in the tropical north, are strongly influenced by phylogeny, and are consistently greater for species inhabiting relatively open or sparsely vegetated habitat. Unlike in marsupials, where some species have much larger body size than rodents, body mass was not an important predictor of decline in rodents. All Australian rodent species are within the prey-size range of cats (throughout the continent) and red foxes (in the south). Contrary to the hypothesis that mammal declines are related directly to ecosystem productivity (annual rainfall), our results are consistent with the hypothesis that disturbances such as fire and grazing, which occur in non-rainforest habitats and remove cover used by rodents for shelter, nesting and foraging, increase predation risk. We agree with calls to introduce conservation management that limits the size and intensity of fires, increases fire patchiness and reduces grazing impacts at ecological scales appropriate for rodents. Controlling feral predators, even creating predator-free reserves in relatively sparsely-vegetated habitats, is urgently required to ensure the survival of rodent species, particularly in northern Australia where declines are not yet as severe as those in the south.
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影响因子：
2.2
作者：
Amori, Giovanni;Gippoliti, Spartaco;Helgen, Kristofer M.
通讯作者：
Helgen, Kristofer M.
影响因子：
6.4
作者：
Fisher, Diana O.;Johnson, Chris N.;Kutt, Alex
通讯作者：
Kutt, Alex
影响因子：
5.9
作者：
DICKMAN, CR;PRESSEY, RL;PARNABY, HE
通讯作者：
PARNABY, HE
影响因子：
8.5
作者：
Di Marco, Moreno;Cardillo, Marcel;Rondinini, Carlo
通讯作者：
Rondinini, Carlo
影响因子：
5.9
作者：
Fisher, Diana O.
通讯作者：
Fisher, Diana O.