关键词: 沉积物, 营养盐, 东海, 再生

Abstract: Based on the population life table and the theory of survival analysis, the static life table of Ginkgo biloba population in Tianmu Mountain Nature Reserve of Zhejiang Province was compiled by applying the age class structure represented by DBH class and the smoothing out technique. The mortality rate curve, killing power curve, survival rate curve, and survival function curve were also analyzed to reveal the population’s quantitative dynamics. There was a fluctuation in the structure of G. biloba population. The survival curve of the population tended to the type of Deevey Ⅱ, and the individuals at adult stage were abundant. The mortality rate curve and killing power curve in the lifespan had similar variation trend, all with the peaks in 6th and 11th age class periods. The survival rate of the population decreased monotonically, whereas the cumulative mortality rate was in adverse. The survival functional curve showed that the G. biloba population grew poorly in early age period and stably in middle age period, but declined in old age period.

Key words: Sediment, Nutrient, East China Sea, Regeneration