To explore the dominant species of soil protozoa and their interspecific associations in different seasons in the Nianchu River Basin,285 soil samples were collected according to the geographical environment characteristics in the Nianchu River Basin three times in May(spring),August(summer)and October(autumn)in 2020.Soil protozoa were cultured and identified by"non-flooded Petri dish"method and"in vivo observation"method,and 327 species of soil protozoa were identified.There are 8 dominant species,belonging to 7 genera,7 families,6 orders,5 classes,and 2 phyla.There is no absolute dominant species(Y＞0.1)appeared in the three seasons,and Halteria grandinella and Colpoda inflata are the common dominant species cross the three seasons.The overall niche overlap is at a low level,the inter-specific competition is not strong,the common use of environmental resources for the dominant species is little,the community structure was stable,and the ecological response rate indicates that the soil protozoa community is in a developing trend.The overall association shows that most species pairs are not correlated to a significant level(2＜3.85),the interspecific association is not close,the relative dynamic equilibrium between species or between species and the environment have not been reached,and species within a community utilizes ecological resources while maintaining independence from one another.
关键词
土壤原生动物/优势种/生态位/种间联结/年楚河流域
Key words
soil protozoa/dominant species/niche/interspecific association/Nianchu River Basin
维普
万方数据