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Observations of interference competition between the introduced black rat and native marsupial gliders in Australia
Austral Ecology ( IF 1.5 ) Pub Date : 2022-07-07 , DOI: 10.1111/aec.13211
Jess McGregor 1 , Jed Field 1 , Chris McLean 2 , Chad Beranek 1 , John Gould 1
Affiliation  

Introduced rodents, particularly the black rat (Rattus rattus), have caused serious ecological impacts due to their ability to interact with native species as both predators, and by eliciting competitive pressure. However, impacts of black rats upon many Australian mammals have yet to be determined, particularly when those mammals are arboreal. Here, we present novel observations in the form of camera trap footage and photographs of interspecific competition between the introduced black rat and two species of arboreal gliding marsupial (sugar gliders (Petaurus breviceps) and squirrel gliders (Petaurus norfolcensis)) in urban bushland reserves in New South Wales, Australia. Gliders were found to flee or were prevented from exploiting food resources due to antagonistic posturing and physical attacks by black rats. While interspecific aggression and interference competition between black rats and native mammal species has been demonstrated previously, this appears to be the first observation of such interactions for Australian gliders. Our findings may have implications for the future management of glider populations in urban bushland where they co-occur with rats; however, further research needs to be undertaken to determine the extent of this potential threat.

中文翻译:

澳大利亚引进的黑鼠与本土有袋类滑翔机之间的干扰竞争观察

引入的啮齿动物,特别是黑鼠 ( Rattus rattus ),由于它们能够与本地物种作为捕食者相互作用并通过引发竞争压力而造成严重的生态影响。然而,黑鼠对许多澳大利亚哺乳动物的影响尚未确定,特别是当这些哺乳动物是树栖动物时。在这里,我们以相机陷阱镜头和引入的黑鼠与两种树栖滑翔有袋动物(糖滑翔机(Petaurus breviceps)和松鼠滑翔机(Petaurus norfolcensis )之间的种间竞争照片的形式呈现新颖的观察结果)) 位于澳大利亚新南威尔士州的城市丛林保护区。由于黑鼠的敌对姿态和物理攻击,滑翔机被发现逃跑或被阻止利用食物资源。虽然之前已经证明了黑鼠和本地哺乳动物物种之间的种间攻击和干扰竞争,但这似乎是对澳大利亚滑翔机这种相互作用的首次观察。我们的研究结果可能对城市丛林中与老鼠共存的滑翔机种群的未来管理产生影响;然而,需要进行进一步的研究以确定这种潜在威胁的程度。
更新日期:2022-07-07
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