Search

We analyzed the relationship between the distribution of amphibians and the environmental variables at the habitat level and landscape level in Fengqiu County of Henan Province, a typical region of the lower reaches of the Yellow River, with the support of geographic information system (GIS) and R software. At the habitat level, dissolved oxygen (DO), conductivity (COND), turbidity (TURB), NH以黄河下游地区封丘县为研究区,在地理信息系统和R软件的支持下,在栖息地水平和景观水平上,分析了两栖类生物分布与栖息地变量(池塘水体溶解氧DO、电导率COND、浊度TURB、水体氨氮NH

Biomass of dominant and companion species in plant functional groups may reflect associations among plant functional groups and species replacement along environmental (elevation) gradients in the typical area of Yi-Luo River. Using community ecology techniques, these researchers examined the influences of elevation factors on plant functional group dynamics and population interactions along elevation gradients in the drainage area of Yi-Luo River. Leaf/stem/fruit/total biomass of dominant and companion species in plant functional groups were calculated and the correlation between elevation and species biomass was analyzed. We showed that elevation was the most important environmental factor affecting the distribution pattern of biomass of plant functional groups composition. Total leaf and stem and fruit biomasses of dominant and companion 19 perennial herbaceous species in plant functional groups were significantly correlated with elevation gradient (P