Korean pine-broadleaved forest serves as a typical representative vegetation of the Northeast China.However,historical harvesting disturbances have resulted in severe ecological degradation,posing a threat to regional ecological security.Biodiversity plays a crucial role in the maintenance of ecosystem functions.Therefore,elucidating the changes in biodiversity pre-and post-harvesting is of great significance for assessing the impacts of harvesting disturbances and understanding the process of forest restoration.Phylogenetic diversity and functional diversity are two important facets of biodiversity.However,traditional research has focused on species diversity,making it difficult to comprehensively reflect on the impacts of harvest disturbance on biodiversity.This study was conducted in Korean pine-broadleaved forests in Jiaohe,Jilin Province.Based on the data obtained from four forest plots,integrating information about plant phylogeny and functional traits,the study explored the impacts of harvesting disturbance on phylogenetic diversity and functional diversity.The harvesting intensity of the four plots included no harvesting(control),harvest 15％of the basal area(light harvesting),harvest 30％of the basal area(moderate harvesting),and harvest 50％of the basal area(heavy harvesting).The results revealed that the medium and high intensity harvesting disturbance significantly reduced phylogenetic diversity and functional diversity.However,under medium disturbance conditions,forests diversity could recover in a short period of time,while the recovery was much slower under high intensity disturbance conditions.In addition,harvesting disturbance also influenced the community weighted mean of functional traits,the community weighted mean of wood density increased with harvesting intensity,while the community weighted mean of the maximum height decreased with harvesting intensity.Moreover,compared to harvesting intensity and basal area reduction,the relationship between basal area remaining and biodiversity was more significantly correlated,indicating that post-harvest stand density played a key role in biodiversity recovery,and it should be highly considered during forest management and restoration.When the basal area of retained trees was around 18 m2/hm2,the relationship between basal area remaining and phylogenetic diversity relationship showed a significant inflection point.In conclusion,phylogenetic diversity and functional diversity offer a novel and comprehensive perspective for evaluating the impacts of harvesting disturbance on biodiversity.The study provides technological support for ecosystem restoration and biodiversity conservation in Korean pine-broadleaved forests.
维普
万方数据
