摘要
利用2008年整个生长季的地面花期物候观测数据,初步研究了青藏高原东缘高寒草甸植物群落开花物候的动态、格局、参数间的联系及其与物种共存的关系。结果表明:植物群落的花期从5月初开始,8月上旬进入开花数目的高峰期,到10月初结束,遍及整个生长季节;不同物种进入花期的时间、峰值期及持续时间不同,各物种花期物候生态位相分离,但群落中大部分物种开花峰值期主要集中在7—8月;不同物种的开花峰值期时间与花期持续时间有负相关关系:开花越早的植物其花期持续时间越长;物种间的开花物候差异主要是由植物本身的特性和环境条件共同决定的,而群落水平上的开花物候格局主要受非生物因素的控制。
Based on the observation on the flowering phenology in the whole growth season of 2008, the dynamics, patterns, and relationships among various parameters of flowering phenology of alpine meadow plant community in eastern Qinghai-Tibetan Plateau were studied, and the potential effects of above-mentioned factors on the species coexistence of the plant community were approached. The flowering period of the plant community started from early May, came into peak period in the first ten days of August, and ended in early October, extending all over whole growth period. Different species had their different first flowering date, peak flowering period, and flowering duration, and their flowering phenological niches differentiated obviously. Most species had their peak flowering period centralized in July - August. There was a negative relationship between peak flowering period and flowering duration： the earlier the flowering, the longer the flowering duration. The differences in flowering phonology among the species were mainly determined by species per se characteristics and environmental conditions, but the flowering phenological pattern on community level was primarily controlled by abiotic factors.
出处
《生态学杂志》
CAS
CSCD
北大核心
2009年第11期2202-2207,共6页
Chinese Journal of Ecology
基金
国家自然科学基金重点资助项目(90202009)
关键词
开花物候格局
物候参数
更新生态位
开花期峰值
flowering phenological pattern
niche
peak flowering date. flowering phenological parameter
regeneration
