关键词: 生态单元制图, 连续性, 生物多样性, 原生林地指示种, 植被结构, 中亚热带人工林, 光能利用效率, 光化学植被指数, 环境因子, 水分状况

Abstract: Based on the biotope classification system with vegetation structure as the framework, a modified biotope mapping model integrated with vegetation cover continuity attributes was developed, and applied to the study of the greenbelts in Helsingborg in southern Sweden. An evaluation of the vegetation cover continuity in the greenbelts was carried out by the comparisons of the vascular plant species richness in long-and short-continuity forests, based on the identification of woodland continuity by using ancient woodland indicator species (AWIS). In the test greenbelts, long-continuity woodlands had more AWIS. Among the forests where the dominant trees were more than 30-year-old, the long-continuity ones had a higher biodiversity of vascular plants, compared with the short-continuity ones with the similar vegetation structure. The modified biotope mapping model integrated with the continuity features of vegetation cover could be an important tool in investigating urban  biodiversity, and provide corresponding strategies for future urban biodiversity conservation.

Key words: biotope mapping, continuity, biodiversity, ancient woodland indicator species, vegetation structure, mid-subtropical planted coniferous forest, light-use efficiency, photochemical reflectance index, environmental factors, water conditions.