2006—2014年民勤4种典型荒漠群落结构及物种多样性变化研究

Four Typical Desert Community Structures and Species Diversity in Minqin from 2006 to 2014

根据2006—2014年民勤荒漠植物4个样区36个样方调查数据,对该区沙蒿、梭梭、麻黄和白刺4种典型荒漠植物群落结构及物种多样性进行分析。结果表明:该区群落结构简单,物种相对单一且数量较少,植物都是以较低的芽位适应生境条件;灌木层物种的变化不大,草本层物种有所增加;多样性指数沙蒿群落、梭梭群落和白刺群落的略有增加,而麻黄群落略有减小;该区群落结构和物种多样性的变化主要由于草本层的物种变化引起。了解和掌握民勤荒漠植物群落的结构和物种多样性变化规律,对于推动干旱荒漠区植被恢复和物种多样性的保护提供依据。

According to the survey data of 4 sample plots in 36 sample areas of Minqin from 2006 to 2014, thecommunity structure and species diversity of Artemisia desertorum, Chenopodiaceae, Ephedra przewalskii Stapfand Nitraria tangutorum Bobr were analyzed. The results showed that the community structure in the studyarea was simple, and the species was homogeneous and the species number was small, the plants were low budnodes to adapt to the habitat conditions; little variation was found in shrub layer species, but the speciesincreased in herb layer; the diversity index of Artemisia desertorum community, Chenopodiaceae communityand Nitraria tangutorum Bobr community increased slightly, and that of Ephedra przewalskii Stapf communitydecreased; the changes of community structure and species diversity in this area were mainly due to the changeof species in the herb layer. Understanding and mastering the change rules of structure and species diversity ofdesert plant communities in Minqin could provide references for promoting arid desert vegetation restorationand conservation of species diversity.