DOI number:10.1016/j.ecolmodel.2023.110405

Affiliation of Author(s):Wuhan University

Journal:ECOLOGICAL MODELLING

Place of Publication:Amsterdam, Netherlands

Funded by:National Natural Science Foundation of China [42171447, 41871296]

Key Words:Net primary productivity; Neighborhood substitution; Urbanization; Climate changes; Quantitative assessment; NET PRIMARY PRODUCTIVITY; LAND-COVER; ECOSYSTEM; EFFICIENCY; DYNAMICS; ECOLOGY; REGION

Abstract:Vegetation plays a vital role in global carbon sink in terrestrial ecosystems and could be affected by climate changes and human activities. In the current context of rapid urban expansion, understanding the impacts of urbanization and climate changes on net primary productivity (NPP) is helpful to sequester more atmospheric carbon and achieve carbon neutrality. We explored the terrestrial spatio-temporal NPP dynamics in China during the years 2000-2010 and 2010-2020, respectively, using the Carnegie-Ames-Stanford Approach (CASA) model based on multi-source remote sensing data. We then proposed a neighborhood substitution model to isolate the effects of urbanization and climate changes on NPP and examined the driving forces for the NPP update. The results revealed that while urbanization was likely to reduce NPP, averagely by 48.57 Tg C and 50.13 Tg C in the two stages, climate changes improved NPP by 97.71 Tg C and 92.46 Tg C, respectively, indicating that the climate changes offset the reduced vegetation productivity from rapid urbanization. The results highlighted that the rapidly urbanizing process reduced vegetation productivity due to the lost vegetated land and degraded vegetation productivity. In addition, the residual effect other than urbanization and the climate changes also played a part on the degraded vegetation carbon sequestration, reducing NPP by an average of 4.29 Tg C year(-1) and 3.94 Tg C year(-1) in the two stages, which could be related to other human activities. We recommend protecting vegetation cover and making informed land use plan as means to improve carbon sequestration in the context of rapid urban expansion and climate changes.

Co-author: Zongyao, Sha, Zilong,Qin

Indexed by:Journal paper

Correspondence Author: Zongyao,Sha

Document Code:WOS:001008309700001

Discipline:环境科学与工程

First-Level Discipline:Ecology

Document Type:Article

Volume:482

ISSN No.:0304-3800

Translation or Not:no

Date of Publication:2023-08-01