摘要
在北仑河口国家级自然保护区,根据地貌沿着水平梯度,将鸟类生境划分为滩涂、红树林、虾塘、农田和树林灌丛5种类型,运用α、β多样性指数研究保护区内冬季鸟类的多样性。结果表明,5种生境的鸟类多样性顺序为:树林灌丛>红树林>农田>虾塘>滩涂;同时,随着生境沿着水平梯度由滩涂逐渐向树林灌丛过渡,生境间的物种数呈现出增加的趋势,共有种逐渐减少,而新增加和减少的物种则逐渐增多,反映出沿着水平梯度,生境间的差异是逐渐增大的。
According to the physiognomy along the horizontal gradient, the birds habitats were divided into beach, mangrove. shrimp pond, farmland and hurst and shrub in National Natural Reserve of Beilun Estuary. The birds diversity in winter was studied using a and fl diversity index. The result showed that the trend of bird diversity in different habitat was exhibited in this order： hurst and shrub 〉 mangrove 〉 farmland〉 shrimp pond〉beach. From the beach to the hurst and shrub along the horizontal gradient, the species between habitats presented a increasing trend. The species in common were decreasing and the species of newly increased and reduced were increasing. The result also showed that the discrepancy between habitats was increscent gradually along the horizontal gradient.
出处
《广西科学》
CAS
2006年第4期305-309,315,共6页
Guangxi Sciences
基金
联合国环境署
全球环境基金
南中国海项目
防城港红树林示范区项目联合资助
关键词
鸟类
多样性
水平梯度
红树林
birds,diversity, horizontal gradient, mangrove
