典型草原刈割条件下优势种群空间格局  

Spatial Pattern of Dominant Species under Mowing Management in Typical Steppe

作　　者：范静宇 王鑫厅[1] 李海兵 李聿泽 姜超[3] 刘芳[1] 李素英[1] 侯亚丽[4] FAN Jingyu;WANG Xinting;LI Haibing;LI Yuze;JIANG Chao;LIU Fang;LI Suying;HOU Yali(School of Resources and Environmental Engineering,Inner Mongolia University of Technology/Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region,Hohhot 010051,China;Inner Mongolia Research Academy of Ecological and Environmental Sciences,Hohhot 010011,China;Institute of Grassl and Research of Chinese Academy of Agriculture Sciences,Hohhot 010010,China;School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学资源与环境工程学院/环境污染控制与修复内蒙古自治区高等学校重点实验室,呼和浩特010051 [2]内蒙古自治区生态环境科学研究院,呼和浩特010011 [3]中国农业科学院草原研究所,呼和浩特010010 [4]内蒙古工业大学能源与动力工程学院,呼和浩特010051

出　　处：《内蒙古大学学报（自然科学版）》2024年第6期429-440,共12页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金项目(32060251);内蒙古科技计划项目(2022YFHH0048);鄂尔多斯市科技重大专项(ZD20232317)。

摘　　要：刈割是草原利用的主要方式之一,在刈割群落中种群空间格局会表现出怎样的格局特征?本文以内蒙古典型草原刈割群落为对象,选择羊草、大针茅和糙隐子草3个主要物种,通过点格局结合不同零模型来探讨这一问题。研究结果表明:(1)对于单一种群空间格局,基于均质泊松模型,羊草、大针茅和糙隐子草3个物种在小尺度范围内均表现为聚集分布,并且这种聚集分布能够被泊松聚块模型很好地描述,说明种群繁殖(分布受限)是造成种群聚集分布的主要原因。(2)对于种间关联,基于双变量均质泊松模型,羊草与大针茅2个种群在小尺度上为负关联,同样,大针茅与糙隐子草2个种群在小尺度上也为负关联,表明羊草与大针茅之间以及大针茅与糙隐子草之间在群落中存在资源竞争;而羊草与糙隐子草2个种群间在小尺度上表现为正关联,说明羊草与糙隐子草之间在群落中不存在资源竞争。Mowing is one of the primary grassland management practices.Exploring its spatial patterns of population in mowing communities is important.This study aimed to explore the spatial distribution patterns of populations in mowing communities,focusing on three dominant plant species(Leymus chinensis,Stipa grandis,and Cleistogenes squarrosa) within a typical grassland community under mowing management.Point pattern analysis with various null models was employed to explore these patterns.The results showed that:(1) All three species(L.chinensis,S.grandis,and C.squarrosa) exhibited small-scale aggregation distribution based on the homogeneous Poisson model.This aggregation pattern was effectively described by the Poisson cluster model,suggesting limited dispersal of population reproduction as the primary drive of aggregation.(2) Bivariate homogeneous Poisson model revealed negative associations between L.chinensis and S.grandis,and between S.grandis and C.squarrosa,at small scales.Our findings suggested potential resource competition between these species pairs.Conversely,a positive association observed species between L.chinensis and C.squarrosa at small scales indicated no evidence of resource competition between these two species.

关 键 词：刈割 空间格局 零模型 点格局分析 

分 类 号：Q948.123[生物学—植物学] S543.9[农业科学—作物学] S812.8