生态学杂志2024，Vol.43Issue(8)：2285-2294,10.DOI:10.13292/j.1000-4890.202408.037
南昌城市化强度对森林植被特征和景观格局指数的影响
Effects of urbanization intensity on forest vegetation characteristics and landscape pattern indices in Nan-chang
摘要
Abstract
Rapid urbanization is shaping urban forests and greenery in China,playing a fundamental role in driving vegetation characteristics and landscape patterns.In this study,we classified the level of urbanization intensity based on the proportion of impervious surface area and investigated 184 plots in the built-up area of Nanchang City.Vegetation and landscape indices were measured and analyzed within each plot.The results showed that landscape patterns and vegetation characteristics greatly differed among different urbanized areas.With increasing urbanization intensity,the landscape indices,including mean perimeter-area ratio,mean Euclidean nearest-neighbor distance,and landscape division index,increased by 130.8％,63.2％,and 92.4％,respectively,and the percentage of landscape type,largest patch index,and aggregation index decreased by 82.8％,85.5％,and 22.3％,respectively.Moreover,the lowest tree height,diameter at breast height,and herbaceous richness were observed in heavily ur-banized areas,whereas woody species density exhibited the opposite trend.The results of variation partition analysis revealed that the impervious surface area and landscape indices explained 0.8％and 17.1％of the variation in vege-tation characteristics,respectively,whereas their interactions explained up to 82.1％.The results of Pearson corre-lation and redundancy analyses showed that changes in forest vegetation characteristics were strongly associated with mean perimeter-area ratio,percentage of landscape type,patch density,and landscape division index.Increasing the mean perimeter-area ratio could increase the richness and cover of herbaceous species in moderately-and lowly-urbanized areas.From the perspective of landscape pattern,we proposed suggestions for protecting urban forests and enhancing plant diversity,aiming to provide references for maximizing the ecological services of urban forests.关键词
城市化强度/城市森林/不透水面面积/物种多样性/景观格局Key words
urbanization intensity/urban forest/impervious surface area/species diversity/landscape pattern引用本文复制引用
钟嘉琳,李心,刘玮,张佛熠,黄菲,徐昇,肖淑芬,王琼..南昌城市化强度对森林植被特征和景观格局指数的影响[J].生态学杂志,2024,43(8):2285-2294,10.基金项目
国家自然科学基金项目(42007042和31960302)和江西省研究生创新专项资金项目(YC2022-s422)资助. （42007042和31960302）
