浙江普陀山岛植被区划方案

植被是海岛生态系统的重要组成部分。因海岛植被特征与大陆植被迥异，现有的陆域植被区划方案不能完全适用于海岛植被，亟须研究海岛植被区划方案，为海岛资源开发与管理、生物多样性保护、生态可持续发展提供重要依据。以浙江省普陀山岛为例，基于123个样地的群落调查、全岛地形地貌普查以及5类微生境的长期气象观测数据，综合提出海岛植被区划需遵循地域分异的相对一致性、植被类型和植物区系相统一、生物因子与非生物因子相结合的原则。制定了海岛植被区划的3级指标体系:一级指标为山体走势和气候；二级指标为海拔或地貌、植被类型；三级指标为微地形、群丛或群落。依据此方案将普陀山岛植被划分为东南坡温暖湿润区和西北坡冬季寒冷干旱区2个大区域，森林、灌丛、草丛等5个二级区域以及13个群落或群丛等三级区域，并详细阐述了每一级区域划分的依据，包括微气候、地形地貌、群落结构和物种组成等。针对区划结果，依据每一级区域中植被的特征提出相应的经营、管理措施，主要包括间伐、抚育、封育、自然演替等。

Vegetation regionalization scheme in Putuo Island,Zhejiang Province

Vegetation is an important part of island ecosystem. Due to the distinction of island vegetation from mainland vegetation, the existing mainland vegetation regionalization cannot be entirely applied to the islands. Hence island vegetation regionalization is necessary to provide scientific basis for the development and management of forest resources, protection of biodiversity and sustainable development of forest. Taking Putuo Island in Zhejiang Province as an example, and drawing on the vegetation investigation of 123 communities, survey of topography and landforms, long-term meteorological observation of 5 types micro-environments, this research put forward three principles that island vegetation regionalization should follow:the relative uniformity of geographical differences, the unification of vegetation types and flora, and the combination of biotic and abiotic factors. A system with three levels of indexes was developed:the primary indexes were mountain trend and climate; the secondary indexes were altitude and vegetation types; and the tertiary indexes were micro-topography and communities. According to this regionalization scheme, Putuo Island vegetation could be divided into two main zones including Southeast warm and humid zone and Northwest winter cold and dry zone, five secondary zones including forests, shrubs, grasses and etc., and thirteen tertiary zones. The research also described the basis of island vegetation regionalization, including the characteristics of microclimate, topography and landforms, community structure, and species components of each zone. Finally, the paper put forward the conservation measures for each zone, including thinning, nurturing, breeding, and natural succession. Putuo Island vegetation regionalization scheme filled the gap of island vegetation regionalization research, and provided references and theoretical guidance for the vegetation regionalization of other islands.