克拉玛依农业综合开发区外围荒漠植物群落物种多样性分析

An analysis on the species diversity of desert plant communities in the outer space of Karamay agricultural comprehensive developmental region

以重要值为测度指标,选择反映群落物种多样性、丰富度和均匀度的7个测定指数,对克拉玛依农业综合开发区外围荒漠植物群落的物种多样性分西南和西北两个区研究。结果表明:①在整个研究区荒漠植物群落中,梭梭、白梭梭、盐穗木、白刺等物种有较高的重要值,而草本植物的重要值较低;②西南区群落物种丰富度指数依次为白梭梭群落>梭梭群落>盐穗木群落;西北区群落物种丰富度指数依次为梭梭+白梭梭群落>梭梭+白刺群落>白梭梭群落;③西南区群落物种均匀度指数依次为盐穗木群落>白梭梭群落>梭梭群落;西北区群落物种均匀度指数依次为白梭梭群落>梭梭+白梭梭群落>梭梭+白刺群落;④总体上,西南区植物群落物种丰富度指数和多样性指数大于西北区,而均匀度指数则小于西北区。

This paper chooses seven measuring indices indicating the community species diversity, richness, and evenness to analyze the species diversity of desert plant communities in the southwest and the northwest area of the outer space of Karamay Agricultural Comprehensive Developmental Region by taking the important value as the measuring index. The results are as follows ： ①The importance value of species Haloxylon ammodendron, Haloxylon persicum, Halostachys caspica, and Nitraria roborowskii is higher in the study area, but herb plant＇s is lower; ②In the southwest area, the species richness indices of plant communities are successively from high to low Ass. Haloxylon persicum 〉 Ass. Haloxylon ammodendron 〉 Ass. Halostachys belangeriana;In the northwest area, the species richness indices of plant communities are successively from high to low Ass. Haloxylon ammodendron ＋ Haloxylon persicum 〉 Ass. Haloxylon ammodendron ＋ Nitraria tangutorum 〉 Ass. Haloxylon persicum ; ③ In the southwest area, the species evenness indices of plant communities are successively from high to low Ass. Halostachys belangeriana 〉 Ass. Haloxylon persicum 〉 Ass. Haloxylon ammodendron ; In the northwest area, the species evenness indices of plant communities are successively from high to low Ass. Haloxylon persicum 〉 Ass. Haloxylon ammodendron ＋ Haloxylon persicum 〉 Ass. Haloxylon ammodendron ＋ Nitraria tangutorum ; ④ All in all, the species richness and diversity indices of plant communities in the southwest area are higher than that of the northwest area, but evenness indices are lower.