The habitat preferences of invasive raccoon dog imply elevated risks for wetland-associated prey species.

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY
Oecologia Pub Date : 2024-10-01 Epub Date: 2024-09-04 DOI:10.1007/s00442-024-05614-y
Pyry Toivonen, Toni Laaksonen, Antti Piironen, Vesa Selonen
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Abstract

Habitat preferences of invasive predators determine where and for which prey species they pose a threat upon. This is crucial information for the conservation of endangered prey species because invasive predators pose additional predation on top of that caused by natural predators. In large parts of Europe, the most common invasive mesopredator is the raccoon dog (Nyctereutes procyonoides). To understand the risk that the raccoon dog poses for wetland-associated species, we collected information about its habitat preferences near these habitats. We used data on 24 GPS-collared raccoon dogs from three landscape types in Finland, to study their spatial and temporal habitat preferences. We first determined their home ranges, within which we then examined habitat use and preferences. Raccoon dogs showed generalist habitat use, which was evident in their wide range of used habitats. However, in spring and summer, during the breeding seasons of waterfowl and amphibians, they preferred wetlands and peatlands. They also preferred shorelines and the edges of forests and agricultural fields. During autumn and winter, raccoon dogs did not prefer wetlands. These findings support the conclusion that the raccoon dog's habitat preferences pose a particular threat to wetland-associated species, such as nesting waterfowl and amphibians. The species' habitat preferences coupled with high numbers of this invasive mesopredator pose additional predation for endangered wetland-associated species on top of that of native predators.

Abstract Image

入侵浣熊犬的栖息地偏好意味着与湿地相关的猎物物种面临的风险增加。
入侵掠食者对栖息地的偏好决定了它们在哪里以及对哪些猎物物种构成威胁。这对于保护濒危猎物物种来说是至关重要的信息,因为入侵捕食者会在天敌造成的捕食之外造成额外的捕食。在欧洲大部分地区,最常见的外来捕食者是浣熊犬(Nyctereutes procyonoides)。为了了解浣熊犬对湿地相关物种构成的风险,我们收集了浣熊犬对这些栖息地附近栖息地偏好的信息。我们使用了来自芬兰三种地貌类型的 24 只被 GPS 定位的浣熊犬的数据,研究了它们对栖息地的空间和时间偏好。我们首先确定了它们的家园范围,然后在此范围内考察了它们对栖息地的利用和偏好。浣熊犬对栖息地的利用表现出普遍性,这一点在它们广泛使用的栖息地中很明显。不过,在春季和夏季,也就是水禽和两栖动物的繁殖季节,它们更喜欢湿地和泥炭地。它们还喜欢海岸线、森林边缘和农田。在秋冬季节,浣熊犬并不喜欢湿地。这些发现支持了浣熊犬的栖息地偏好对湿地相关物种(如筑巢的水禽和两栖动物)构成特别威胁的结论。该物种的栖息地偏好加上这种外来中型食肉动物的大量出现,在本地食肉动物的捕食之外,对濒危湿地相关物种造成了额外的捕食。
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来源期刊
Oecologia
Oecologia 环境科学-生态学
CiteScore
5.10
自引率
0.00%
发文量
192
审稿时长
5.3 months
期刊介绍: Oecologia publishes innovative ecological research of international interest. We seek reviews, advances in methodology, and original contributions, emphasizing the following areas: Population ecology, Plant-microbe-animal interactions, Ecosystem ecology, Community ecology, Global change ecology, Conservation ecology, Behavioral ecology and Physiological Ecology. In general, studies that are purely descriptive, mathematical, documentary, and/or natural history will not be considered.
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