Existence analysis of populations of Mosla hangchowensis, an endangered plant

Authors
Citation
Y. Ge et J. Chang, Existence analysis of populations of Mosla hangchowensis, an endangered plant, BOTAN B A S, 42(2), 2001, pp. 141-147
Citations number
19
Categorie Soggetti
Plant Sciences
Journal title
BOTANICAL BULLETIN OF ACADEMIA SINICA
ISSN journal
00068063 → ACNP
Volume
42
Issue
2
Year of publication
2001
Pages
141 - 147
Database
ISI
SICI code
0006-8063(200104)42:2<141:EAOPOM>2.0.ZU;2-I
Abstract
Mosla hangchowensis Matsuch is an annual herb, which is found only on the s eacoast of Zhejiang province in southeast China. The species has declined i n numbers and is now endangered. The survival ratio, seminal power, reprodu ctive success ratio, and density as: well as other factors were measured fr om 1993 to 1996, and an existence analysis was performed. There are two env ironmental sieves during the life history of this species, and the survival curve is between the Deevey-I and Deevey-II. A constant proportion of indi viduals died throughout the life cycle. The optimum niche of M. hangchowens is is a habitat with soil depth 20-30 cm, with moderate to slightly wet con ditions, with neither too intense nor too shaded light. The realized niche now is on the top of rocky hills or along gravel roadsides. Sites: are few and dispersed. Loss of the optimum niche and a decrease of realized habitat s as a result of human activities, the disparity between the realized niche and the optimum, and a low dispersal ability of populations are currently contributing to the endangerment of M. hangchowensis.