Journal article
Impacts of urbanization on carbon balance in terrestrial ecosystems of the Southern United States
Environmental pollution (1987), Vol.164, pp.89-101
05/2012
Handle:
https://hdl.handle.net/2376/117343
PMID: 22343525
Abstract
Using a process-based Dynamic Land Ecosystem Model, we assessed carbon dynamics of urbanized/developed lands in the Southern United States during 1945–2007. The results indicated that approximately 1.72 (1.69–1.77) Pg (1P = 1015) carbon was stored in urban/developed lands, comparable to the storage of shrubland or cropland in the region. Urbanization resulted in a release of 0.21 Pg carbon to the atmosphere during 1945–2007. Pre-urbanization vegetation type and time since land conversion were two primary factors determining the extent of urbanization impacts on carbon dynamics. After a rapid decline of carbon storage during land conversion, an urban ecosystem gradually accumulates carbon and may compensate for the initial carbon loss in 70–100 years. The carbon sequestration rate of urban ecosystem diminishes with time, nearly disappearing in two centuries after land conversion. This study implied that it is important to take urbanization effect into account for assessing regional carbon balance.
► A series of spatial and temporal urban/developed land maps were generated. ► Urbanization effects on regional carbon dynamics were studied with a process-based Dynamic Land Ecosystem Model (DLEM). ► Carbon storage of urban/developed land was comparable to that stored in cropland and shrubland in the Southern United States. ► Pre-urbanization vegetation type and time since land conversion were two primary factors determining the extent of urbanization impacts on carbon dynamics. ► Urbanization resulted in carbon emission, but established urban areas may gradually accumulate carbon over time.
Urbanization has resulted in carbon release to the atmosphere, but established urban areas may gradually accumulate carbon over time.
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Details
- Title
- Impacts of urbanization on carbon balance in terrestrial ecosystems of the Southern United States
- Creators
- Chi Zhang - Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaHanqin Tian - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAGuangsheng Chen - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAArthur Chappelka - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAXiaofeng Xu - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAWei Ren - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USADafeng Hui - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAMingliang Liu - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAChaoqun Lu - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAShufen Pan - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USAGraeme Lockaby - School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USA
- Publication Details
- Environmental pollution (1987), Vol.164, pp.89-101
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900547954601842
- Language
- English
- Resource Type
- Journal article