Seasonal change and community function of diversity of spiders and their insect prey in the Poyang Lake Nanji Wetland National Nature Reserve
This paper aims to explore the indicator effect of spiders and their insect prey on the stability of wetland ecosystem structure and energy-material cycle,and provides reference for the protection and utilization of biodiversity in the Poyang Lake Nanji Wetland National Nature Reserve.Under the principle of landscape ecology,ecological quantitative investigation and diversity analysis methods such as community sample site setting and observation were adopted for associated specimen collection and identification.We collected a total of 73 species of spiders in 16 families and 50 genera,and find some results:1)The community structure and function analysis show that the Nanji shrub provides shelter for spider breeding and acts as a storehouse,the Nanji meadow is a platform for spider actual combat and evolution of their feeding behavior,and the Nanji forest is a pedal of limited time convergence and timely flight for all kinds of spiders.In spring and summer,aquatic or habitat insects in the Nanji meadow are the main preferred prey or potential prey of spiders,and in autumn and winter,the Nanji shrub becomes the gathering place or shelter for uncommon insects;They dominate the height of richness,dominance,diversity and evenness of the spiders and their insect prey respectively.2)The cluster analysis shows that the frequency and continuity of communication among each spider communities in Nanji Wetland are limited by regional heterogeneity and spatial distance,and the cohesion and divergence function of community types are stable;The frequency and continuity of communication among each insect prey communities are affected by time domain homogeneity and seasonal phenology,and the edge difference of community types and patch function are stable.3)The correlation analysis suggests that the diversity indices of spiders and their insect prey communities are correlated in spring and summer,autumn and winter,and in general.Some spatiotemporal indices are intercorrelated.Changes in phenological conditions such as geographical or seasonal temperature and humidity are their main driving force.Spiders and insects are two important intermediate links in the food chain,which together maintain the operation and balance of the Nanji Wetland ecosystems.
zoologythe Nanji Wetlandspiderinsect preydiversityseasonal changecommunity function
NETL
NSTL
万方数据
