兴安杜鹃野生种群的资源现状评估与多维保护策略研究OA

To systematically assess the current status of wild Rhododendron dauricum populations,elucidate their endangerment mecha-nisms,and propose scientifically grounded conservation strategies based on multidimensional data.Based on multi-source data including morphological anatomy,physiological ecology,population distribution,and genetic diversity,we systematically assessed the current status of Rhododendron dauricum L.population resources by integrating life table analysis,ecological niche evaluation,and analysis of chloroplast sequences and SSR markers.Furthermore,we constructed a framework for assessing its endangerment risk by incorporating multidimen-sional stress factors such as climate,habitat conditions,and human disturbances.Wild R.dauricum populations exhibit marked habitat frag-mentation and spatial isolation,with restricted gene flow accelerating genetic differentiation among groups.The species depends on cold and humid environments and is highly sensitive to warming,with phenological advances potentially causing reproductive asynchrony.Its shallow root system also faces elevated risk during warm winters.Model simulations indicate that future suitable habitats will shrink sub-stantially and shift toward higher latitudes and elevations.Human activities further degrade habitat quality,driving a continued decline under combined climatic and anthropogenic pressures.R.dauricum is already on the verge of endangerment under multiple overlapping stressors.Conservation efforts should prioritize improving habitat connectivity,strengthening legal regulation,public education,and ex situ conser-vation,and enhancing germplasm preservation.Restoration of fragmented habitats,construction of ecological corridors,and strengthened climate-response monitoring are essential.Artificial propagation should be promoted to reduce harvesting pressure,and molecular marker-assisted selection should be applied to identify key stress-resistance genes,facilitating coordinated progress in species protection and susta-inable utilization.