ECOLOGICAL EFFECTS OF NITROGEN DEPOSITION ON URBAN FORESTS:AN OVERVIEW

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外文摘要：The global urban area is expanding continuously,resulting in unprecedented emissions and deposition of reactive nitrogen(N)in urban environments.However,large knowledge gaps remain in the ecological effects of N deposition on urban forests that provide key ecosystem services for an increasing majority of city dwellers.The current understanding of the spatial patterns and ecological effects of N deposition in urban forests was synthesized based on a literature review of observational and experimental studies.Nitrogen deposition generally increases closer to cities,resulting in an urban hotspot phenomenon.Chemical components of N deposition also shift across urban-suburban-rural gradients,showing higher ratios of ammonium to nitrate in and around urban areas.The ecological effects of N deposition on urban forest ecosystems are overviewed with a special focus on ecosystem N cycling,soil acidification,nutrient imbalances,soil greenhouse gas emissions,tree growth and forest productivity,and plant and soil microbial diversity.The distinct effects of unprecedented N deposition on urban forests are discussed in comparison with the common effects in natural forests.Despite the existing research efforts,several key research needs are highlighted to fill the knowledge gaps in the ecological effects of N deposition on urban forests.

外文关键词：

biodiversitycarbon sequestrationnitrogen depositionnutrient imbalancesoil acidificationurban forest

作者：

Enzai DU、Nan XIA、Yuying GUO、Yuehan TIAN、Binghe LI、Xuejun LIU、Wim DE VRIES

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作者单位：

State Key Laboratory of Earth Surface Processes and Resource Ecology,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China

School of Natural Resources,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China

National Academy of Agriculture Green Development,Key Laboratory of Plant-Soil Interactions of Ministry of Education,College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China

Wageningen University and Research,Environmental Research,PO Box 47,NL-6700 AA Wageningen,the Netherlands

Wageningen University and Research,Environmental Systems Analysis Group,PO Box 47,NL-6700 AA Wageningen,the Netherlands

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基金：

国家自然科学基金国家自然科学基金国家自然科学基金State Key Laboratory of Earth Surface Processes and Resource EcologyFok Ying-Tong Education Foundation

项目编号：

4187732841630750414250072021-TS-02161015

出版年：

2022

农业科学与工程前沿(英文版)

CSCD

ISSN：

年,卷(期)：2022.9(3)

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