Biomass Allocation of Scirpus mariqueter Along an Elevational Gradient in a Salt Marsh of the Yangtse River Estuary
长江口盐沼海三棱藨草在高程梯度上的生物量分配(英文)作者机构：华东师范大学河口海岸国家重点实验室上海200062 华东师范大学环境科学系上海200062 曲阜师范大学地理系山东曲阜250041
出 版 物：《Acta Botanica Sinica》 (Acta Botanica Sinica（植物学报：英文版）)
年 卷 期：2001年第43卷第2期
页 面：178-185页
核心收录：
主 题：asexual reproduction corm salt marsh sexual reproduction life history strategy trade_off
摘 要：Scirpus mariqueter Tang et Zhang is a typical pioneer plant colonizing the bare beaches of the Yangtse River estuary. To explore the life history strategy of the species with reference to environmental physical stress, the biomass allocations to different plant components and some related morphological parameters were examined along an elevational gradient within a salt marsh. Authors found that S. mariqueter performed best at medium elevation within the marsh, with relatively high density of shoot and individual ramet dry mass. Biomass allocation to corm was the highest at low elevations, and the least at high elevations, suggesting that a conservative strategy was adopted by the species to cope with the harsh physical conditions at the low elevation. The investment in rhizome decreased from low to high elevations, while the proportion of inflorescence mass increased, indicating that during the life history, the species shifts from predominant asexual reproduction to predominant sexual reproduction. This may be favourable for the species to colonize larger area, and to spread and persist at a meta_population level. Correlation analyses showed that sexual reproduction was inversely related to growth and asexual reproduction. However, it is difficult to determine the relationship between asexual reproduction and growth possibly because of the varied function of the corms of the species in different life history stages.
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