拉萨河流域黑颈鹤国家自然保护区维管植物群落分类与排序研究

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中图分类号：S812.6 文献标识码：A 文章编号：1007-0435（2026）04-1458-13

Abstract：To clarify the community structure，distribution patern of wild vascular plants in wetlands of the National Nature Reserve for Black-necked Cranes in the Lhasa River Basin and their relationship with environmental factors，the study conducted field surveys on 23 typical plots in the reserve from 2O22 to 2O23，using methods such as TWINSPAN clasification，CCA ordination，and diversity index analysis，to systematically investigate community type classification，spatial distribution characteristics，environmental driving mechanisms，and the coupling relationship with black-necked crane habitats.Results showed that a total of 114spe- cies of wild vascular plants belonging to 83 genera and 34 families were recorded inthe study area，with dicotyledonous herbs as the main components; TWINSPAN classified the communities into 7 types，among which the communities were mainly composed of herbaceous plants，with fewer arbor plants. CCA ordination indicated that longitude，mean annual precipitation，slope gradient，and slope aspect were the key environmental factors driving community distribution. Diversity analysis showed that the Shannon-Wiener index（1.31-2.95）and Simpson index（O. 37-O. 99） were significantly different among communities （ ⋅P<0.05） ，and the Mantel-test confirmed that mean annual precipitation had the most significant impact on the Pielou evennessindex and Shannon-Wiener index .Further quantification by RDA analysis showed that longitude，mean annual precipitation， slope aspect，and slope gradient were the core factors regulating community diversity. Among them，the Shannon-Wiener index and Pielou index were positively correlated with mean annual precipitation，and the Simpson index responded significantly to the longitude gradient.The results revealed the adaptation paterns of plateau wetland plant communities to hydrothermal gradients，providing a theoretical basis for the protection of blacknecked crane habitats and wetland ecosystem management.

Key words： Black-necked crane national nature reserve;Quantitative classification; Ordination; Community diversity;Environmental factors

植物群落分类、排序与多样性研究是植被生态学的基础课题之一，在揭示群落结构演替规律、环境响应机制和生态系统功能方面发挥着重要作用[1]。（剩余20115字）