Two-dimensional pattern analysis on dominant species and community in subalpine meadow of Luya Mountain, Shanxi Province, China |
| |
Authors: | Zhang Jintun |
| |
Institution: | (1) College of Life Sciences, Beijing Normal University, Beijing, 100875, China |
| |
Abstract: | The spatial pattern analysis of population and community is important to understand community structure and has become one
key topic in modern plant ecology. There are many techniques for analyzing one-dimensional pattern in ecological literature.
Two-dimensional pattern analysis is better than one-dimensional analysis in the study on community spatial characteristics
and structure. However, it is hard to analyze these two-dimensional patterns due to poor effective methodology. The two-dimensional
sampling using two transects that meet at right angles was applied to get quadrat data in this work. And then the data from
the two transects were analyzed separately by one-dimensional pattern analysis method, two-term local quadrat variance. The
length, width, and area of patches at different scales of pattern for populations were obtained from the analysis. For community
pattern, detrended correspondence analysis (DCA) was employed to summarize the species information firstly, and then the first
DCA axis scores were analyzed to check its pattern. The application of this method to the pattern analysis on dominant populations
and community for subalpine meadow (Comm. Polygonum viviparum + Carex rigescens + Kobresia bellardii) in the Luya mountains showed that it could release the characteristics of spatial pattern clearly and was a very effective
technique. The method is easy to use and saves time with obvious advantages, compared with the two-dimensional pattern analysis
methods presented in the literatures. In the study meadow, the patterns of the main dominant species, Polygonum viviparum, Carex rigescens, and Kobresia bellardii, were apparent and comparatively regular in shape with large areas of patches at the same scale compared with other species
such as Festuca sp. and Thalictrum petaloideum. There were two or three scales of patterns for each plant population studied. This was related to population features, the
interaction with environmental factors, and their dominant position in the community. The two scales of patterns for the meadow
community were clear. The pattern of community was closely correlated with that of the main dominant species. The patches
of dominant species were inter-distributed and overlapped, and formed the community pattern together. This is beneficial for
utilization of resources, and keeping the community stable.
__________
Translated from Acta Ecologica Sinica, 2005, 25(6): 1264–1268 译自: 生态学报] |
| |
Keywords: | population distribution spatial pattern community structure quantitative methodology two-dimensional pattern analysis |
本文献已被 SpringerLink 等数据库收录! |
|