Comparative Analysis Of Plant Diversity In Xiaoxing'anling Protected Area And Adjacent Areas

By studying the plant diversity in the Small Khingan area and comparing the diversity of protected areas and adjacent areas,the purpose is to explore the dynamic response of forest plant diversity to climate change and harvesting disturbances,and to provide scientific protection for the protection of forest resources and development of plant diversity protection measures.Basis and reference value.This study was based on the climate data of the RCP2.6 scenario predicted by the climate change model(GFDL-CM3)and the current climate scenario.Combined with the current harvesting plan,the forest landscape model LANDIS PRO 7.0 and the forest system process model PnET-II were used to simulate natural successional scenarios.Climate scenarios of forests in the Small Khingan Mountains region from2000 to 2300 under the four scenarios of the scenarios of harvesting,harvesting scenarios,climate change scenarios,climate change and harvesting interaction scenarios,comparative analysis of dynamic changes of plant diversity in protected areas and adjacent areas,and exploration of climate Changes and the impact of harvesting on plant diversity.In addition,the simulation results were verified according to the field survey data in the Small Khingan Mountains in 2016.Meanwhile,the simulation results of the forest landscape model LANDIS PRO 7.0 were compared with the plant diversity in the field survey area to further demonstrate the credibility of the model in the study area,reducing the uncertainty of the model in simulating the dynamic succession of the future forest.The study concluded that:(1)Four kinds of scenarios The plant diversity in the study area showed an overall trend of increase,decrease,and increase.In general,the plant diversity in the study area showed an increasing trend.The degree of impact on diversity from high to low is:climate change and harvesting interaction scenarios,climate change scenarios,natural succession scenarios,and harvesting scenarios.(2)Comparing the simulation results with the related indices of plant diversity,it showed that there was no significant difference in plant diversity between the protected areas and adjacent areas in the study area under the four scenarios.In some time periods,the diversity of plant species in the protected areas was lower than that in the adjacent areas.(3)Future climate change,logging,and their interactions will affect the above-ground biomass of the arbors in the study area.The impact of climate change on the above-ground biomass of arbors was not significant,and both felling and interaction scenarios affected the above-ground biomass of the 15 tree species simulated.(4)The long-term simulation results of the LANDIS PRO model were verified using the 2016 survey data of the friendly protected area.The results showed that the average value of the forest plant diversity obtained from the simulation calculation was basically consistent with the survey data of the 2016 friendly friendly area,which verified the LANDIS.The suitability of the PRO model in the study area.