研究了淮河下游地区落叶阔叶栎类林多样性空间格局及其与气候的关系。选取物种多样性指数 ( SDI)、群落均匀度指数 ( CEI)和生态优势度指数 ( EDI)测度栎类林多样性 ,以可能蒸发量 (干燥度 )分析气候特征 ,结果表明: ( 1) 栎类林 SDI 0. 24～ 2. 19, CEI 0. 15～ 0. 92, EDI 0. 13～ 0. 91,其多样性表现出自北向南、自西向东增加的规律 , ( 2) 栎类林多样性的空间格局与该地区干湿状况的地域分异规律相一致。 文中还就该地区生物多样性的有效保护提出了建议。
 

The spatial pattern of the diversity of deciduous broad-leaved oak forest in the Lower Huaihe Valley and its relation to the climate are studied. Species diversity index ( SDI) , community evenness index ( CEI) and ecological dominance index ( EDI) are used to measure the forest diversity, and potential evapo-transpiration ( by Penman′s method) is adopted to analyse the characteristics of climate. The results are as following: ( 1) SCI, C EI and EDI for oak forest remain 0. 24～ 2. 19, 0. 15～ 0. 92 and 0. 13～ 0. 91 respectively. The diversity of oak forest reveals the regularity with the increasing from the north /west to the south /east. ( 2) The spatial pattern of diversity of oak forest corresponds to the regional differentiation of aridity. Finally,proposals are put forward for the biodiversity conservation of the studied region.