摘要
海三棱藨草群落是生长在海岸带滩涂原生裸地上的原生植被,在上海地区分布面积达20多万亩。本项工作研究了上海市南汇县东海农场海堤外侧滩涂上海三棱藨草种群的物候和分布格局。根据滩涂高程以及海三棱藨草种群生长状况,可以划分成三个地带,即地带A,海三棱藨草与芦苇群落交错区;地带B,海三棱藨草种群生长最适的中潮位地带;地带C,梅三棱藨草种群定居地带。由于三个地带内,生境条件不同,海三棱藨草种群的物候有明显差异。从地带A至C,海三棱藨草种群的分布格局依次为随机分布、均匀分布和随机分布或群聚分布。其空间分布格局在随时间变化的同时也在空间上改变其位置。
Scirpus mariqueter community is a primary vegetation occuring on seabeach salt marshes, the distribution of which in Shanghai is more than 200,000 Mu.This study, the phenology and spatial distribution pattern of Scirpus mariqueter populations, was carried out at a seabeach salt marsh in Donghai Farm, Nan-
hui county, Shanghai. According to the altitude of salt marsh and the growing status of Scirpus mariqueter populations, three zones could be recognized, that is, zone A, the ectone of Scirpus mariqueter and Phragmites australis; zone B,the optimum area for Scirpus mariqueter population growth; zone C, the colonizing area of Scirpus mariqueter population. There were obvious differences in the phenology of Scripus mariqueter populations, due to the different habitat conditions in three zones. From the zones A to C, the spatial distribution patterns of Scirpus mariqueter populations appeared in order as random, regular and clumped or random. The distribution patterns were changed in spatial positions along with their changes in time, which also reflected the reformative roles of
Scirpus mariqueter populations on the habitats of seabeach salt marshes.
基金
国家教委<资助优秀年轻教师基金>资助
关键词
海三棱Lu草
物候
分布格局
Scirpus mariqueter
Phenology
Spatial distribution pattern
