生态经济
生態經濟
생태경제
Ecological Economy
2012年
8期
168~172
,共null页
刘雪华 邱志 姜炎彬 邵小明
劉雪華 邱誌 薑炎彬 邵小明
류설화 구지 강염빈 소소명
白家湾河流域 开矿 植物多样性 除趋势典范对应分析
白傢灣河流域 開礦 植物多樣性 除趨勢典範對應分析
백가만하류역 개광 식물다양성 제추세전범대응분석
Baijiawan watershed; mining; plant species diversity; DCCA
开矿导致地表植被破坏,并使植物群落结构发生改变。以零星矿井式开采的四川马边白家湾矿区为研究区域,通过群落调查,采用重要值和物种多样性指数,结合除趋势典范对应分析(DCCA)排序和多元回归进行数据分析,研究了开矿对植物多样性格局的影响。结果表明:(1)随着开矿干扰减弱,植物群落分为明显的四个群丛,依次由草本向灌木、乔木顺序演替;(2)开矿干扰与DCCA轴紧密相关,是影响植物多样性的重要环境因素,导致乔木层盖度变化且对多样性有直接影响;(3)群落间相似性与开矿干扰负相关,而物种替代速率与开矿干扰呈U型关系。
開礦導緻地錶植被破壞,併使植物群落結構髮生改變。以零星礦井式開採的四川馬邊白傢灣礦區為研究區域,通過群落調查,採用重要值和物種多樣性指數,結閤除趨勢典範對應分析(DCCA)排序和多元迴歸進行數據分析,研究瞭開礦對植物多樣性格跼的影響。結果錶明:(1)隨著開礦榦擾減弱,植物群落分為明顯的四箇群叢,依次由草本嚮灌木、喬木順序縯替;(2)開礦榦擾與DCCA軸緊密相關,是影響植物多樣性的重要環境因素,導緻喬木層蓋度變化且對多樣性有直接影響;(3)群落間相似性與開礦榦擾負相關,而物種替代速率與開礦榦擾呈U型關繫。
개광도치지표식피파배,병사식물군락결구발생개변。이령성광정식개채적사천마변백가만광구위연구구역,통과군락조사,채용중요치화물충다양성지수,결합제추세전범대응분석(DCCA)배서화다원회귀진행수거분석,연구료개광대식물다양성격국적영향。결과표명:(1)수착개광간우감약,식물군락분위명현적사개군총,의차유초본향관목、교목순서연체;(2)개광간우여DCCA축긴밀상관,시영향식물다양성적중요배경인소,도치교목층개도변화차대다양성유직접영향;(3)군락간상사성여개광간우부상관,이물충체대속솔여개광간우정U형관계。
Mining can cause ground vegetation destructed and result in structure changing of plant communities. This research selected Baijiawan mining area with the main way of sporadic mining in the southwest of Sichuan, China as the study area. Through surveying plant communities, calculating the important value and diversity indices, and applying DCCA and multiple regression methods, we researched mining impacts on species diversity pattern. The results showed that: (1) the communities are divided into four obvious groups along the gradient of mining disturbance. With decreasing of mining disturbance, the plant species distributes with the sequence of grass-herbs, shrubs and trees. (2) Mining factor is strongly correlated with the DCCA axes and an important influencing factor of all environmental variables to plant species diversity. (3) There is a negative correlation between community similarity and mining disturbance; while a U-shape relationship occurred between species replacement rate and mining disturbance.