基于MaxEnt模型预测白唇鹿的潜在分布区

研究物种分布格局对制定有效保护措施至关重要。本研究从文献记录和实地调查中获取97个分布点, 筛选出7个重要环境变量, 采用最大熵(MaxEnt)模型分析了中国青藏高原特有种白唇鹿(Przewalskium albirostris)的潜在分布区域。结果显示: 白唇鹿潜在分布区主要位于青藏高原东部, 适宜生境呈现出以西藏、青海和四川三省交界地带为核心向四周扩散的模式。刀切法(Jackknife)分析表明, 地形、气温季节变化和年降水量是决定白唇鹿分布的重要因素, 人类影响变量贡献相对较小。白唇鹿种群现状尚不清晰, 建议对该物种进行全面深入调查。

Predicting the potential distribution of white-lipped deer using the MaxEnt model

Species distribution is critical for developing effective conservation measures. The potential geographic distribution of the white-lipped deer (Przewalskium albirostris), which is endemic to the Qinghai- Tibetan Plateau, was delineated using the Maximum Entropy (MaxEnt) model with 97 occurrence records and 7 environmental variables. The species occurrences were collected from literature and field investigations. Our results showed that the potential range of the white-lipped deer included the eastern part of the Qinghai-Tibetan Plateau and the potential habitat spread from one core region to neighboring regions among Tibet, Qinghai, and Sichuan provinces. The Jackknife test indicated that the topographic variable, temperature seasonality, and annual precipitation were the most important predictive factors for the model, while the human activity variable made a relatively small contribution. The current distribution and status of the white-lipped deer on the Qinghai-Tibetan Plateau is unclear and we suggest further research is needed on the species.