Diversity Changes and Biotic Homogenization of Plant Functional Zoning in University Campuses——Taking the Gaoqiao Campus of Neijiang Normal University as an Example
Campuses is an integral component of urban plant resources.This research focuses on universities in Southwest China to analyze the types,structural characteristics,variation patterns of diversity,and community similarity within each functional zone of the target campus.The findings indicate that:①There are more species of trees and herbs in the campus;the vegetation species in the public leisure area and the teaching area are higher at all levels,Conversely,sports areas and entrance zones exhibit relatively fewer species;② There exists a significant negative correlation between campus plot size and Menhinick/Pielou indices,with Menhinick index exhibiting a more pronounced decreasing trend compared to Pielou index as plot area increases.There was no correlation between Margalef index and Pielou index,but there was significant or extremely significant correlation between other indexes.All remaining indices exhibit either significant correlation or highly significant correlation.The dominance has the greatest impact on the α diversity index of campus,with the dominance index D being the highest,followed by dominance index DB P,richness index DMargalef,richness index Dmn,and evenness index E;③The ecological stability of the tree layer is higher than that of the shrub layer and the herbaceous layer,and the ecological stability is similar among different regions.Vegetation at different levels in public leisure area,public building area,teaching area and dormitory area is similar to each other,and the same dominant vegetation in each area contains a large number of introduced ornamental trees and ground covers,resulting in the similarity of campus landscape and the phenomenon of vegetation homogenization.
university campusplant species diversitya diversitybiotic homogenizationcommunity similarity
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