|Table of Contents|

Niche Studies on Populations of Endangered Endemic Plants Ottelia acuminate in China(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年04
Page:
133-137
Research Field:
Publishing date:

Info

Title:
Niche Studies on Populations of Endangered Endemic Plants Ottelia acuminate in China
Author(s):
ZHAI Shuhua; HOU Siming; LIU Lingyun; YANG Xiaohong
Life Science & Technology Department，Kunming University，Kunming，Yunnan 650214
Keywords:
Ottelia acuminate （Gagnep.) Dandy.; niche breadths; niche overlap; endangered mechanism
PACS:
-
DOI:
10.11937/bfyy.20173162
Abstract:
Based on extensive ecology investigation on Ottelia acuminate populations,seven natural populations from seven different localities were analyzed and investigated in this study.One distributing locality regarded as dimensional resource niche,the niche breadth and interspecific niche overlap among 9 dominant species were calculated.The results showed that the niche breadth in Ottelia acuminate was the largest（LB=3.621，HB=0.428）,and that in other major populations as Potamogeton sp., Ceratophyllum demersum, Hydrilla verticillata, Utricularia aurea, Myriophyllum spicatum, Chara sp., Najas sp. and Vallisneria natans were followed successively,indicating that Ottelia acuminate had a strong ability to utilize its environmental resources.But the niche of Ottelia acuminate overlaped too much with such populations as Potamogeton sp., Myriophyllum spicatum, Hydrilla verticillata and Utricularia aurea,suggesting that these species had similar systems to use their environmental resources,and thus fierce competition might occur among them under the condition of insufficient supply of environmental resources,which might be one of the extinguished reasons for Ottelia acuminate due in the limitation to its population diffusion and thus resulting in the reduce in its quantity.The above mentioned in this study might provide a theoretical reference for cultivation,proliferation and conservation of Ottelia acuminate.

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Last Update: 2018-02-27