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Little evidence that plateau pika (Ochotona curzoniae) colonies influence habitat use by the Qinghai toad-headed agama (Phrynocephalus vlangalii)
Journal of Arid Environments ( IF 2.7 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jaridenv.2020.104263
Joseph P. Lambert , Robyn P. Geldard , Li Yibin , Shi Kun , Philip Riordan

Abstract The burrows of the plateau pika (Ochotona curzoniae) increase microhabitat heterogeneity and provide breeding sites and refuge for several vertebrate species on China's Qinghai-Tibetan Plateau. Despite their important role in the ecosystem, pikas are poisoned in China and have been extirpated in some areas. The Qinghai toad-headed agama (Phrynocephalus vlangalii) has been referred to as strongly dependent on pika burrows, although their relationship has never been studied in any detail. We used single-season occupancy models to investigate the influence of pika colonies on probability of site occupancy by P. vlangalii in China's Yanchiwan National Nature Reserve. Models containing pika burrow density as a predictor performed no better than the null model. Absolute values of estimated β-coefficients associated with burrow density were also very small (
更新日期:2020-12-01
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