生态学报2018，Vol.38Issue(4)：1235-1244,10.DOI:10.5846/stxb201701050046
长白山苔原草本植物入侵与土壤环境的关系
Relationship between herbaceous plant invasion and soil properties in the Changbai Mountain Tundra
摘要
Abstract
The Changbai Mountain tundra,which is located in the upper part of the Changbai Mountain volcanic cone (2000-2500m),is the only typical alpine tundra in eastern China,and because its environmental characteristics are similar to those of polar tundra,the Changbai Mountain tundra is highly valuable for scientific research.Herbaceous species invasion has been found in both polar tundra and alpine tundra,this phenomenon may caused by the climate change.In general,there is a close correlation between tundra vegetation and soil,the change of vegetation community structure directly or indirectly led to changes in soil properties.The progression of invasion resulted in a decrease in the organic matter content.The growth of tundra vegetation is affected by both temperature and soil composition (i.e.,nutrients),whereas the composition of the plant community affects local soil processes.The vegetation of the Changbai Mountain tundra is undergoing significant changes in response to global climate change.On the western slopes of the mountain,herbaceous plants have become invasive and have expanded their distribution,whereas the importance of shrubs as the dominant plant type has been significantly reduced.The present study investigated the relationship between herbaceous plant invasion and soil properties in 100m × 1600m transects and 132 plots in August 2014.The latitude,longitude,and elevation of the sample plots were measured using GPS,whereas slope measure,direction,and position were measured using a compass,and the plant community characteristics (species,height,number,coverage) and soil thickness were recorded in the field,whereas the physico-chemical properties (n =12) of sieved soil samples (0-10cm) measured in the laboratory.Redundancy and canonical correlation analyses indicated that the invasion degree of the Changbai Mountain tundra varied significantly and could be categorized into five invasion levels.In addition,ten of the soil factors (e.g.,elevation,slope,Total K,clay content,organic matter content) were significantly correlated with the degree of herb invasion,and the samples with higher herbaceous invasion were mainly located in areas with lower elevations,greater slopes,relatively low mineral,organic nutrient,sand,and silt contents,and relatively high clay content.However,there was no obvious relationship between herbacious invasion and available nutrient contents (available N,available P,available K).Redundancy analysis indicated that soil factors explained 93％ of the variation in plant species abundance and that the main soil factors affecting herb invasion were organic matter content,clay content,and slope,whereas shrub growth was mainly affected by organic nutrient content.Furthermore,the distributions of the herbaceous plants Deyeuxia angustifolia and Sanguisorba stipulata were related to soil thickness and clay content,respectively.Meanwhile,canonical correlation analysis indicated that soil factors and plant species abundance were significantly correlated and the habitats of different herbaceous species were significantly different.More specifically,first canonical variables indicated that organic matter content was positively correlated with Rhododendron chrysanthum abundance and negatively correlated with S.stipulate abundance,whereas the second canonical variables indicated that elevation and available nitrogen content were negatively correlated with the abundance of Vaccinium uliginosum and Geranium baishanense.关键词
草本植物入侵/土壤理化因子/土壤因子/高山苔原土/长白山Key words
herbaceous plant invasion/physico-chemical soil property/soill factor/alpine tundra soil/Changbai Mountain引用本文复制引用
刘羽霞,许嘉巍,靳英华,张英洁,牛莉平,王嫒林,贺红士..长白山苔原草本植物入侵与土壤环境的关系[J].生态学报,2018,38(4):1235-1244,10.基金项目
国家自然科学基金项目(41571078,41171072) （41571078,41171072）
长白山科学研究院开放基金项目(201501) （201501）
