为了研究绵阳市涪城区近年来生态环境质量变化,利用2013—2021年涪城区的Landsat8影像数据,计算其遥感生态指数(Remote sensing based ecological index,RSEI),采用变异系数、Theil-Sen斜率估计、Mann-Kendall检验等方法分析RSEI的时空...为了研究绵阳市涪城区近年来生态环境质量变化,利用2013—2021年涪城区的Landsat8影像数据,计算其遥感生态指数(Remote sensing based ecological index,RSEI),采用变异系数、Theil-Sen斜率估计、Mann-Kendall检验等方法分析RSEI的时空变化特征和稳定性,对不同的生态因子与环境质量的关系进行空间驱动力分析,同时预测生态环境质量的未来变化趋势.结果表明:(1)2013—2021年,涪城区RSEI均值为0.626,空间分布呈现“西北高,东南低”的格局;(2)近10年间,涪城区的生态环境质量整体呈上升趋势,RSEI的年增长率为0.0026 a^(-1);(3)通过分析Hurst指数可知,涪城区54.83%的区域生态环境质量呈现反持续特征;(4)涪城区RSEI空间分布的关键环境影响因子是土地利用覆盖类型,其中以土地利用类型、坡度和夜间灯光强度3种环境因子影响力最大.多因子协同作用的驱动力大于单因子,其中土地利用覆盖类型和坡度的交互解释力最强.研究结果可为区域生态环境保护提供有力支持.展开更多
Environmental DNA(eDNA)technology has revolutionized biodiversity monitoring with its non-invasive,sensitive,and cost-efficient approach.This paper systematically reviews eDNA advancements,examining its applications i...Environmental DNA(eDNA)technology has revolutionized biodiversity monitoring with its non-invasive,sensitive,and cost-efficient approach.This paper systematically reviews eDNA advancements,examining its applications in aquatic and terrestrial ecosystems and assessing China’s standardization progress.It delineates four developmental phases from single-species detection to high-throughput sequencing,and highlights China’s contribution to the development of technical standards.While significant progress has been made,challenges persist in quantitative accuracy,methodological consistency,and large-scale implementation.Future efforts should prioritize enhanced standardization,improved quantification techniques,broader applications,and international collaboration to drive innovation in eDNA technology.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.32160172)the Key Science-Technology Project of Inner Mongolia(2023KYPT0010)+1 种基金the Natural Science Foundation of Inner Mongolia Autonomous Region of China(Grant No.2025QN03006)the 2023 Inner Mongolia Public Institution High-Level Talent Introduction Scientific Research Support Project.
文摘Environmental DNA(eDNA)technology has revolutionized biodiversity monitoring with its non-invasive,sensitive,and cost-efficient approach.This paper systematically reviews eDNA advancements,examining its applications in aquatic and terrestrial ecosystems and assessing China’s standardization progress.It delineates four developmental phases from single-species detection to high-throughput sequencing,and highlights China’s contribution to the development of technical standards.While significant progress has been made,challenges persist in quantitative accuracy,methodological consistency,and large-scale implementation.Future efforts should prioritize enhanced standardization,improved quantification techniques,broader applications,and international collaboration to drive innovation in eDNA technology.
