影响澳大利亚东南部两种姬蛙利用微生境的因素

IF 1.6 4区 环境科学与生态学 Q3 ECOLOGY
Austral Ecology Pub Date : 2024-07-17 DOI:10.1111/aec.13567
Dylan M. Westaway, Chris J. Jolly, Damian R. Michael, Dale G. Nimmo
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引用次数: 0

摘要

尽管微生境是物种生态学的一个核心方面,并对物种保护具有重要影响,但对于大多数物种而言,它们对精细尺度生境特征(微生境)的利用及其随时间的变化情况却知之甚少。在这项研究中,我们利用对马利树龙(Amphibolurus norrisi)和彩龙(Ctenophorus pictus)进行的522次无线电追踪,研究了环境和个体变量对微生境使用的影响。马利树龙在热天和中午(一天中最热的时候)更倾向于利用树木,而在凉爽的日子和早晨则更倾向于利用灌木。彩龙在较热的日子和中午更可能使用灌木和草木,而在较凉爽的日子、上午和下午则使用洞穴。我们预计这些模式代表了动物从在不适宜的热量条件下占用的避难所资源转移到在热量最佳时期提供晒太阳、觅食和社交机会的微生境。此外,我们还发现了个体发育转变的证据,体型较大的马利树龙更喜欢在树上栖息,栖息地也更高,这表明随着年龄的增长,马利树龙的栖息地已从灌木过渡到树上。我们的研究结果表明,需要多样化的微生境来适应蜥蜴的体温调节和个体发育要求。这些见解可为保护和栖息地恢复工作提供信息,确保提供必要的微生境以支持物种的持续生存。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Factors affecting microhabitat use in two agamid species from south-eastern Australia

Factors affecting microhabitat use in two agamid species from south-eastern Australia

Despite being a central aspect of a species' ecology and having important conservation implications, the use of fine-scale habitat features (microhabitats), and how they vary over time, are poorly known for most species. In this study, we leveraged 522 relocations of radio-tracked mallee tree dragons (Amphibolurus norrisi) and painted dragons (Ctenophorus pictus) to investigate the effect of environmental and individual variables on microhabitat use. Mallee tree dragons were more likely to use trees on hot days and in the middle of the day (the hottest time of day), whereas shrub use was more likely on cool days and in the mornings. Painted dragons were more likely to use shrubs and grass trees on warmer days and during the middle of the day, whereas burrows were used during cooler days and in the mornings and afternoons. We expect these patterns represent animals moving from refuge resources, occupied during unsuitable thermal conditions, to microhabitats offering basking, foraging and social opportunities during periods of thermal optimum. Additionally, we found evidence of an ontogenetic shift, with larger mallee tree dragons favouring tree use and higher perches, suggesting a transition from shrub to tree use with age. Our findings underscore the need for diverse microhabitats to accommodate the thermoregulatory and ontogenetic requirements of lizards. These insights can inform conservation and habitat restoration efforts, ensuring the provision of essential microhabitats to support species persistence.

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来源期刊
Austral Ecology
Austral Ecology 环境科学-生态学
CiteScore
2.90
自引率
6.70%
发文量
117
审稿时长
12-24 weeks
期刊介绍: Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere. Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region. Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.
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