摘要
目的:了解气候变暖背景下具鳞水柏枝花期的变化,为深入了解植物物候对气候变化的响应提供理论依据。方法:基于数字标本馆1930~2019年间具鳞水柏枝的物候数据,采用线性回归、多样性指数及群落相似性分析等方法,分析花期随时间和海拔的变化规律。结果:具鳞水柏枝的花期随年份的增加有上升趋势,且1990~2019年间花期发生了极显著延迟(P<0.01),表明近30年气候变暖对物候影响加剧;花期多样性(Shannon指数)在1990~2019年间显著高于早期时段(P<0.01),可能源于气候变化导致的生境异质性增加;基于Bray-Curtis和Jaccard距离的PCoA分析显示,不同30年时间梯度下的花期组成结构差异极显著(P<0.01),1990~2019年群落格局明显偏离历史时期,进一步证实气候驱动的物候重组。结论:气候变化使得具鳞水柏枝花期整体呈现延后趋势。
Objectives:This study aimed to investigate the flowering phenology of Myricaria squamosa under climate warming,providing theoretical insights into plant phenological responses to climatic shifts.Methods:Based on phenological data sourced from digital herbarium records spanning 1930 to 2019,linear regression,diversity indices,and community similarity analyses were employed to examine temporal and elevational variations in flowering periods.Results:The flowering period of M.squamosa exhibited a progressive delay over time,with a statistically significant shift(P<0.01)observed during 1990 to 2019,indicating intensified phenological impacts from recent warming. Flowering diversity (Shannon index) was significantly higher (P < 0.01) in 1990 to 2019 than in earlier periods, likely due to increased habitat heterogeneity induced by climate change. PCoA analysis revealed distinct compositional structures (P < 0.01) across 30-year time gradients, with post-1990 communities markedly diverging from historical patterns, further confirming climate-driven phenological reorganization. Conclusion: In summary, climate change has led to a pronounced delay in the flowering phenology of M. squamosa, highlighting its sensitivity to ongoing environmental transformations.
作者
李波
刘尉
王丽华
曹巧遇
郑思豆
何威威
赵鹏程
杨文晴
陈俊
曾珍
LI Bo;LIU Wei;WANG Lihua;CAO Qiaoyu;ZHENG Sidou;HE Weiwei;ZHAO Pengcheng;YANG Wenqing;CHEN Jun;ZENG Zhen(Key Lab.of Ecological Protection and Characteristic Industry Cultivation in Hengduan Mountain Area,Sichuan Minzu College,Ganzi 626001,China;Aba Institute of Biodiversity&Resource Botany,Aba Teachers College,Aba 623002,China;College of Resources&Environment,Aba Teachers College,Aba 623002,China;Chengdu Academy of Agriculture and Forestry Sciences,Chengdu 611100,China;College of Forestry,Sichuan Agricultural University,Chengdu 611100,China)
出处
《中国野生植物资源》
2025年第11期77-82,共6页
Chinese Wild Plant Resources
基金
国家自然科学基金(32360298)
横断山区生态保护与特色产业培育重点实验室(HDSQ202506Y002)
阿坝师范学院阿坝州生物多样性与资源植物研究所(中心)(AS-XIPT2024-11)。
关键词
具鳞水柏枝
气候变暖
花期
数字标本
Myricaria squamosa Desv.
Climate warming
Flowering period
Digital specimen
