锡林河流域滨河带湿地植物功能性状及差异研究
Study on the functional traits and differences of wetland plants in Xilin River Basin
寇欣 1刘华民 2张景慧 2苑鹏云 1曹晓霭 1温璐 2于晓雯 1刘东伟 2王立新2
作者信息
- 1. 内蒙古大学生态与环境学院, 呼和浩特 010021
- 2. 内蒙古大学生态与环境学院, 呼和浩特 010021;草原生态安全省部共建协同创新中心, 呼和浩特 010021;蒙古高原生态学与资源利用教育部重点实验室, 呼和浩特 010021
- 折叠
摘要
作为河流景观重要组成部分的滨河带,是河流水体系统与相邻陆地之间的界面或生态过渡区.湿地植物及其群落在维系湿地生态系统稳定性及功能方面具有重要作用.本文通过对比锡林河流域滨河带上游、中游、下游以及放牧干扰下湿地植物 20 种功能性状,在流域尺度上探究滨河带湿地植物功能性状对环境和放牧强度的响应,研究表明:锡林河流域滨河带不同河段湿地植物各功能性状变异系数波动范围较大,其中叶片碳含量(LCC,Leaf Carbon Concentration)变异系数最小为0.05,变异系数最大的是光合速率(Pn,Photosynthetic Rate),其值为2.64;湿地植物的结构性状与生理性状之间通过互补与替代、在功能上的平衡实现对环境的适应;湿中生草本、中生草本、旱生草本植株高度在退化样地显著低于轻微退化样地;植物株高、叶片 LCC/LNC(Leaf Carbon Concentration/Leaf Nitrogen Concentration)、LNC/LPC(Leaf Nitrogen Concentratio/Leaf Phosphorus Concentration)在五种共有植物种芦苇(Phragmites australis)、扁穗草(Blysmus rufus)、鹅绒委陵菜(Potentilla anserina)、小糠草(Agrostis alba)、疗齿草(Odontites vulgaris)群落之间均存在显著差异;锡林河流域滨河带湿地植物在不同放牧梯度下,无论是在功能群水平还是植物共有种水平,对退化程度均表现出不一致的响应.
Abstract
The riparian zone,as an interface or an ecological transition zone between the river water system and adjacent land,is an important part of the river landscape.Wetland plants and their communities play an important role in maintaining stability and function of wetland ecosystems.In this paper,20 functional traits of wetland plants in the upper,middle and lower reaches of the Xilin River basin and under grazing disturbance were compared to explore the response of plant functional traits to environment and grazing intensity on the basin scale.The results showed that the variation range of functional traits of wetland plants in different reaches of Xilin River was large,the minimum coefficient of variation in leaf carbon content was 0.05 and the largest coefficient of variation was the photosynthetic rate with a value of 2.64.The structural traits and physiological traits of wetland plants could be adapted to the environment through complementation and substitution,and functional balance changes.The plant height of Mesic herb,Mesophilous herb and Xerophilous herb was significantly lower than that in the slightly degraded plot.The plant height and leaf LCC/LNC(leaf carbon concentration/leaf nitrogen concentration)and LNC/LPC(leaf nitrogen concentration/leaf phosphorus concentration)were significantly different among the five common plant species:Phragmites australis,Blysmus rufus,Potentilla anserina,Agrostis alba,Odontites vulgaris.Under different grazing gradients in the Xilin River basin,the response of plant functional traits to different degradation levels was not consistent,either at the functional group level or at the plant common species level.
关键词
锡林河流域/滨河带/植物功能性状/放牧干扰Key words
Xinlin River basin/riparian/plant functional traits/grazing interference引用本文复制引用
基金项目
国家自然科学基金(32160279)
国家自然科学基金(32161143025)
国家自然科学基金(31960249)
内蒙古自治区重点研发和成果转化项目(2022YFHH0017)
内蒙古自治区科技重大专项(2021ZD0011)
出版年
2024
国家科技期刊平台
NSTL
万方数据