山羊与高温:夏季温度对不同生态型山羊栖息地选择和活动模式的不同影响。

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY
Oecologia Pub Date : 2024-12-01 Epub Date: 2024-11-03 DOI:10.1007/s00442-024-05633-9
Albert Michaud, Kevin S White, Sandra Hamel, Julien H Richard, Steeve D Côté
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引用次数: 0

摘要

气候变化对北方和高山环境的影响尤为严重,其变暖速度快于全球平均水平。由于高山和北部物种特别适应低温,当温度超过临界值时,大多数物种必须改变其行为。因此,评估温度升高如何影响栖息在北部和高山环境中的物种,对于了解预计气候变化对这些生态系统的影响至关重要。我们分析了温度对适应寒冷的山地专家山羊(Oreamnos americanus)四个种群的活动模式和栖息地选择的影响。我们在 2010-2019 年期间收集了来自沿海和大陆两种不同生态类型的 223 只山羊的 GPS 定位和活动传感器数据。通过资源选择建模方法,我们确定当温度升高时,两种生态型的山羊对高山草甸的选择都会减少。对开阔、饲料丰富的栖息地的选择减少与对沿海地区以雪/冰斑块为主的栖息地和大陆地区以森林为主的栖息地的选择增加有关。大陆环境中的山羊只有在温度升高时才会选择海拔较高的栖息地,而沿海环境中的山羊在任何温度下都会选择海拔较高的栖息地。当中午温度升高时,两种生态类型的山羊都减少了活动时间的比例。我们的研究揭示了山羊使用不同的策略来缓解热压力,而且这些策略在不同生态型之间存在差异,这突出表明在评估气候变化对种群的影响时,需要考虑物种内部对特定环境的适应性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Of goats and heat, the differential impact of summer temperature on habitat selection and activity patterns in mountain goats of different ecotypes.

Climate change disproportionately affects northern and alpine environments, with faster rates of warming than the global average. Because alpine and northern species are particularly well adapted to cool temperatures, most species must modify their behavior when temperatures exceed a critical threshold. Evaluating how temperature increases affect species inhabiting northern and alpine environments is therefore essential to understand the effects of projected climate change on these ecosystems. We analyzed the influence of temperature on the activity patterns and habitat selection of four populations of a cold-adapted, mountain specialist, the mountain goat (Oreamnos americanus). We collected GPS location and activity sensor data during 2010-2019 from 223 mountain goats from two distinct ecotypes: coastal and continental. Using a resource selection modeling approach, we determined that mountain goats of both ecotypes decreased selection for alpine meadows when temperatures increased. Reduced selection for open, forage rich habitat was associated with increased selection for habitat dominated by snow/ice patches in coastal areas, and by forests in continental sites. Mountain goats in continental environments selected higher elevation habitats only when temperature increased, whereas goats in coastal environments selected higher elevation habitat at all temperatures. Mountain goats of both ecotypes reduced the proportion of time spent active when temperatures increased during the middle of the day. Our study reveals that mountain goats use diverse tactics to mitigate thermal stress, and that these tactics vary between ecotypes, highlighting the need for considering adaptation to specific environments within a species when assessing climate change impacts on populations.

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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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