Habitat selection by sympatric chiru and Tibetan gazelle in the Aru Basin,Chang Tang Nature Reserve,Tibet Autonomous Region, China
Habitat selection by sympatric chiru and Tibetan gazelle in the Aru Basin,Chang Tang Nature Reserve,Tibet Autonomous Region, China
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发表时间：
2008
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通讯作者：
L. Fox
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作者：
L. Fox
然而，两种植物的生境选择在大多数方面是相似的，都选择低海拔、相对平坦、朝北的针茅植被。这两个物种都强烈地避开了出现在平坦、低海拔地点的苔类植被。两个物种之间的差异主要体现在瞪羚更多地使用近山和丘陵栖息地，这可能与食物选择和捕食者躲避有关。结果表明，这两个物种之间发生栖息地分离的尺度通常比这里测量的要大，也要小，例如在针茅植被类型中，植物群落斑块可能是决定研究地点差异栖息地选择的关键因素。
Habitat selection was examined between two sympatric ungulate species of the high Tibetan plateau, the chiru (Tibetan antelope) Pantholops hodgsoni and the Tibetan gazelle Procapra picticaudata. The study was conducted in a high elevation area of low human presence during the early part of two summers (2000-2001), within the Aru Basin, Tibet Autonomous Region, China. Potential niche divergence between chiru and Tibetan gazelle was assessed in relation to elevation, slope angle, distance to hills, aspect and vegetation type and resource selection functions were used to attempt to differentiate habitat selection between species. However, habitat selection by the two species was similar in most respects, with both selecting low elevation, relatively flat, northerly facing aspects in Stipa-forb vegetation. Both species strongly avoided Carex vegetation that was present in flat, low elevation sites. Differences between the two species were noted primarily in the gazelle’s somewhat greater use of near-hill and hill habitats, possibly related to both food selection and predator avoidance. The results suggest that the scale on which habitat separation occurs between these two species is generally both larger and smaller than that measured here, with plant community patchiness, within the Stipa-forb vegetation type for example, probably a key factor in determining differential habitat selection within the study site.