An experiment to test key hypotheses of the drivers of reptile distribution in subalpine ski resorts

Chloe F. Sato; Jeff T. Wood; Mellesa SchroderKen GreenWilliam S. OsborneDamian R. MichaelDavid B. Lindenmayer

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An experiment to test key hypotheses of the drivers of reptile distribution in subalpine ski resorts

机译：An experiment to test key hypotheses of the drivers of reptile distribution in subalpine ski resorts

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1. Alpine and subalpine ecosystems support many endemic species. These ecosystems are increasingly under threat from human-induced disturbances such as habitat loss and fragmentation as a consequence of ski resort development and expansion. However, limited peer-reviewed research has investigated the impacts of ski-related disturbances on wildlife, particularly on reptiles. 2. To address this knowledge gap, we conducted reptile surveys to determine the patterns of reptile distribution and abundance in Australian ski resorts. Then, using a factorial experimental design, we investigated 1) the influence of temperature and predation in driving observed distributions and 2) how a common ski resort management practice - mowing of modified ski slopes - affected thermal regimes and rates of predation of reptiles on ski runs. 3. We found that the removal of vegetation structural complexity through mowing resulted in significantly higher rates of predation on plasticine models, as well as significantly altered thermal regimes. 4. Crucially, mown ski runs had higher maximum ground temperatures that frequently exceeded the recorded critical maximum body temperatures of the target species of lizards. Thus, mowing has the potential to render these areas unsuitable for thermoregulatory purposes for a large proportion of the potential activity period of reptiles. 5. Together, modifications of the thermal environment and elevated rates of predation appear to explain the avoidance of ski runs by reptiles. To facilitate the persistence of reptiles in disturbed subalpine environments, management plans must focus on implementing strategies that reduce the impact of human activities that alter temperature regimes and predation rates on lizards. 6. Synthesis and Applications. We suggest that the retention of structural complexity on ski runs (e.g. through the cessation of mowing during peak reptile activity periods) and/or revegetation with native plant communities will concurrently prov

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来源
《The Journal of Applied Ecology》 |2014年第1期|13-22|共10页
作者
Chloe F. Sato; Jeff T. Wood; Mellesa SchroderKen GreenWilliam S. OsborneDamian R. MichaelDavid B. Lindenmayer;
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作者单位

Fenner School of Environment and Society, The Australian National University, Canberra, ACT 0200, Australia;

National Parks and Wildlife Services, Snowy Mountains Region, PO Box 2228, Jindabyne, NSW 2627, Australia;

Institute for Applied Ecology, University of Canberra, Canberra, ACT 2601, Australia;

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正文语种英语
中图分类生态学（生物生态学）;
关键词
grasslands; high altitudes; lizards; mowing; predation risk; ski run; skinks; temperature regimes;

An experiment to test key hypotheses of the drivers of reptile distribution in subalpine ski resorts

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