浙江四明山沼泽湿地植物功能性状研究

为理解浙东亚高山沼泽湿地不同植物的生态策略,收集了浙江四明山12种典型沼泽湿地植物,对其主要功能性状进行了统计比较。结果表明：(1)不同沼泽湿地植物功能性状变异程度不同,变异系数(CV)最大为叶片密度(216.16%),最小为相对叶绿素含量(22.84%),平均变异为112.86%。(2)叶周长分别和叶面积、叶干重、叶长和叶长宽比呈显著正相关(P<0.05);叶形指数与叶面积、叶长、叶长宽比和叶片密度呈显著负相关(P<0.05);棘刺与比叶面积呈显著正相关(P<0.05);生活史与相对叶绿素含量呈显著正相关(P<0.05);根状茎或匍匐茎与叶形指数呈显著负相关(P<0.05);生活型与异形叶性呈显著负相关(P<0.05)。(3)17项功能性状主成分分析(PCA)的前3大主成分累计贡献率达到71.47%,可综合表征和概述为：植物叶片的质量和大小(35.72%)、对水分和氮素的吸收(18.74%)、植物抵御草食动物的能力和强光下的自我保护能力(17.01%)。(4)物种-功能性状排序图结合UPGMA聚类分析均支持将12种植物划分为2个功能组,第1功能组包...

Functional traits of twelve species of marsh plants in Siming Mountain, Zhejiang Province

To understand the ecological strategies of different marsh plants in subalpine forests of eastern Zhejiang, twelve typical marsh plants in Siming Mountain, Zhejiang Province, were collected, and their main functional traits were statistically compared. Results showed that:(1) the plant functional traits in different marsh plants exhibited some degrees of variation. The maximum coefficient of variation (CV) was leaf density (216.16%), while the minimum was relative chlorophyll content (22.84%), with the average variation reached to 112.86%. (2) Leaf perimeter was significantly positively correlated with leaf area, leaf dry weight, leaf length and leaf length to width ratio (P<0.05). Leaf shape index was significantly negatively correlated with leaf area, leaf length, leaf length to width ratio and leaf density (P<0.05). Thorn was significantly positively correlated with specific leaf area (P<0.05), and life history was significantly positively correlated with relative chlorophyll content (P<0.05). Rhizome or stolon was negatively correlated with leaf shape index (P<0.05). There was a significant negative correlation between growth type and heterophylly (P<0.05). (3) The cumulative contribution rate of the first three principal components of the 17 functional traits principal component analysis (PCA) reached 71.47%, which can be comprehensively characterized and summarized as follows:the quality and size of plant leaves (35.72%), the effect on water and nitrogen absorption (18.74%), the ability of plants to resist herbivores and self-protection ability under strong light (17.01%). (4) The species-functional trait ranking diagram combined with UPGMA cluster analysis supports the division of 12 plants into two functional groups. The first functional group includes Sagittaria trifolia and Hemerocallis fulva, adopting a "high investment-slow returns" strategy, while the second functional group contains the remaining 10 plants, adopting a "low investment-quick returns" strategy. In conclusion, the variation of plant functional traits was abundant in Simingshan marsh, and the species have formed different plant functional groups through the combination and the trade-off between functional traits, hence improving the adaptability of the heterogeneous marsh habitat in the mountainous marsh.