滇西北水蓼叶功能性状的关联性及其对气候因子的响应

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中图分类号：Q949.9 文献标识码：A 文章编号：1000-3142（2026）02-0311-09

Abstract： The studyoftheresponse of wetland plants toclimate change is the foundation forunderstanding the response of wetlandecosystemto climate change.Thisstudytook Persicaria hydropiper，onetypeof emergentaquatic plantinthe lakeside zoneof Jianhu，Lashihai，Luguhu andNapahai inNorthwest Yunnan，asthe research object.The species’ functional traits were measured，thealtitudeand climatic factorsof four sampling sites were colected，andthe relationship between functional traits of P . hydropiper and climatic factors was detected through redundancy analysis to exploreclimateresponse variationsof these functional traits.Theresultswereas folows：（1）The stomatal densityand leaf mass per area of P .hydropiper significantly increased with the increase of altitude，however，stomatal conductance， conduit area，stomatal area，leaf carbon mass fraction，and leaf nitrogen mass fraction significantly decreased with increasing altitude （ P<0.05 ）.（2）The mean annual temperature，mean annual precipitation，and mean annual air relative humidity were the main climatic factors affecting the functional traits of P hydropiper. The speciespreferred to grow in lowaltitude habitatswith relativelyhigh temperature，precipitation，and air humidity.（3）There wasa functional correlation between the functional traitsof P .hydropiper.Net photosyntheticrate was significantlyand positively corelatedwith leaf vein density，leaf mass per area，and leaf phosphorus mass fraction，while it was significantly and negatively correlated with sieve tube area （ P <0.05）. Stomatal conductance and transpiration rate were significantlyand positivelycorrelated with stem diameter，stomatal size，andleaf carbon mass fraction.Transpirationrate wasalso significantly and positively correlated with plant height（ P<0.05 ）. This study reveals the main environmental factors that affect the functional traits of P . hydropiper，and provides scientific data for its functional adaptability in the context of climate change.

Key words： plateau wetland， plant functional trait，responsive strategy，altitude，climatic factor

气候变化背景下的植物功能响应研究，是了解生态系统应对气候变化的有效手段。（剩余14310字）