首页|澜沧县桉树引种对林下植物多样性及生境质量的影响研究

澜沧县桉树引种对林下植物多样性及生境质量的影响研究

Study on the effects of Eucalyptus introductions on understory plant diversity and habitat quality in Lancang County

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外来树种桉树(Eucalyptus robusta Smith)的林下植物物种组成及多样性对区域生态系统功能有显著影响,桉树引种对林下植物多样性的影响一直存在争议,同时桉树引种对区域生境质量的影响尚不明晰.作者以典型桉树引种区云南省澜沧拉祜族自治县为研究区,运用空间代替时间及典型抽样法,分析成熟桉树人工林对林下植物多样性的影响;并基于物种多样性指数和NDVI修正InVEST模型参数,揭示成熟桉树人工林的生境质量特征.结果表明:①从整个群落看,桉树替代常绿阔叶林、思茅松林、灌木林后,成熟桉树人工林的林下植物多样性降低,所有对比样地的Sorensen指数低,且 2/3 的桉树林样地Shannon-Wiener指数较低;②低生境分布在北部和西部地区的建设用地、旱地、水田等区域,大面积的林地生境质量较高,其中常绿阔叶林、思茅松林、灌木林和成熟桉树人工林的生境质量均值分别为 0.9941、0.9967、0.9933、0.9231,成熟桉树人工林的生境质量最低;③通过生态安全系数验证,修正生境适宜度参数后的InVEST模型,生境质量更具有科学性和合理性.
The diversity of understory plants and the composition of Eucalyptus robusta Smith have a significant impact on regional ecosystem functions.However,the effect of introducing Eucalyptus species on understory plant diversity has been a subject of controversy.Similarly,the impact of Eucalyptus species on the quality of regional habitats remains uncertain.This study focuses on Lancang County,Yunnan Province,to investigate the influence of mature Eucalyptus plantations on understory plant diversity using spatial analysis and typical sampling methods.The study adjusts InVEST model parameters based on species diversity indices and NDVI to elucidate the habitat quality characteristics of mature Eucalyptus plantations.The analysis yields three main findings.Following the replacement of evergreen broad-leaved forests,Simao pine forests,and shrub forests by Eucalyptus,both the Sorensen index and the Shannon-Wiener index showed a decrease,indicating reduced diversity in the understory plant community of mature Eucalyptus plantations.Woodland habitats in large areas exhibited higher quality,whereas the habitat quality of mature Eucalyptus plantations was notably lower,especially in the northern and western regions.By verifying the biodiversity security coefficient,the InVEST model,after adjusting habitat suitability parameters,produced more scientifically and reasonably estimated habitat quality.

mature Eucalyptus plantationsundergrowth plant diversityhabitat qualityInVEST model parameter correctionLancang

周世杰、赵筱青、黄佩、冯严、董雯雯、唐媛媛、刘玉杰、熊波

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云南大学地球科学学院,云南昆明 650500

云南大学国际河流与生态安全研究院,云南昆明 650500

云南省国土资源规划设计研究院,云南昆明 650200

成熟桉树人工林 林下植物多样性 生境质量 InVEST模型参数修正 澜沧

国家自然科学基金云南大学研究生人才培养模式改革计划云南大学研究生人才培养模式改革计划

42061052CZ22622203-2022-28CZ22622203-2022-29

2024

10.7540/j.ynu.20230089

云南大学学报(自然科学版)
云南大学

云南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.663
ISSN：0258-7971
年,卷(期)：2024.46(2)
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