长江三峡库区草丛群落多样性的研究

通过对三峡库区草丛群落的初步调查,发现该地区灌丛现有20个群落类型,常见的班茅茅叶草丛群落、拟金草草丛群落、芒草丛群落、光叶里白草丛群落、香附子草丛群落,其丰富度指数、多样性指数相对较高,而小颖羊茅草丛群落、油芒草丛群落、金发草草丛群落、鸢尾草丛群落、牛鞭草草丛群落、马唐草丛群落、黄茅草丛群落、类芦草丛群落、斑茅草丛群落、瘦脊野谷草草丛群落丰富度适中;双花草草丛群落、狗牙根草丛群落、矛叶荩草草丛群落、白茅草丛群落、尼泊尔芒草丛群落的丰富度相对较低;草丛群落多样性在海拔梯度上未表现出明显的规律性,这可能与库区内强烈的人为干扰活动有关.

The Study of Biodiversity on Hassocks in Three Gorges Reservoir Area in China

According to the data of hassocks from 120 plots,there are 20 community types in the Three Gorges Reservoir area.As for the common hassocks, such as:Saccharum arundinaceum + Arthraxon lanceolatus community, Eulaliopsis binata community, Miscanthus sinensis community, Diplopterygium laevissimum community, Cyperus rotundus community, the richness index and diversity index are relatively high; the index in Festuca parvigluma community, Eccoilopus cotulifer community, Pogonatherum paniceum community, Iris tectorum community, Hemarthria altissima community,Digitaria sanguinalis community, Heteropogon contortus community, Neyraudia neynaudiana community, Saccharum arundinaceum community, Arundinella hirta var.depauperata community is moderate, and the index in Dichanthium annulatum community, Cynodon dactylon community, Arthraxon lanceolatus community, Imperata cylindrica community,Diandranthus nepalensis community is relatively low. The trend of biodiversity along elevation is not regular, maybe human disturbance is one of the main reasons.