Interspecific relations of the wild community of Artemisia annua and their responses to flooding disturbance
Yan Zhi, Feng Shi · Guihaia · 2009
To investigate the effect of flooding disturbance on the interspcefic relations of associated species of Artemisia annua,a comparison study was conducted in the natural fostering base from 2006 to 2007.Contingency table was used to calculate the interspecific association indice,while Spearman Rank correlation coefficient was adopted to analyze the interspecific covariance.The results showed that flooding disturbance had little effect on the association type for most species pairs,but had some effect on the rank coefficients of inter-specific co-variance.Different species pairs varied greatly in their responses to the flooding disturbance.It showed that the inter-specific co-variance relations were not only dependent on environmental perturbation or disturbance factors,but also on the biological and ecological properties of the species that comprised the species pairs.Interspecific covariance based on the numerical properties of the communities were much more sensitive to the external disturbance than the interspecific associations caculated only based on the binary data ofpresence or absence of species.