DOI: 10.1111/gcb.13816
Scopus记录号: 2-s2.0-85041368538
论文题名: The role of protected areas in land use/land cover change and the carbon cycle in the conterminous United States
作者: Lu X. ; Zhou Y. ; Liu Y. ; Le Page Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 2 起始页码: 617
结束页码: 630
语种: 英语
英文关键词: carbon cycle
; climate change
; disturbances
; ecosystem modeling
; land use/land cover change
; protected areas
Scopus关键词: carbon cycle
; carbon sink
; climate change
; disturbance
; ecosystem modeling
; grassland
; land cover
; land use change
; protected area
; shrubland
; terrestrial ecosystem
; United States
英文摘要: Protected areas (PAs) cover about 22% of the conterminous United States. Understanding their role on historical land use and land cover change (LULCC) and on the carbon cycle is essential to provide guidance for environmental policies. In this study, we compiled historical LULCC and PAs data to explore these interactions within the terrestrial ecosystem model (TEM). We found that intensive LULCC occurred in the conterminous United States from 1700 to 2005. More than 3 million km2 of forest, grassland and shrublands were converted into agricultural lands, which caused 10,607 Tg C release from land ecosystems to atmosphere. PAs had experienced little LULCC as they were generally established in the 20th century after most of the agricultural expansion had occurred. PAs initially acted as a carbon source due to land use legacies, but their accumulated carbon budget switched to a carbon sink in the 1960s, sequestering an estimated 1,642 Tg C over 1700–2005, or 13.4% of carbon losses in non-PAs. We also find that PAs maintain larger carbon stocks and continue sequestering carbon in recent years (2001–2005), but at a lower rate due to increased heterotrophic respiration as well as lower productivity associated to aging ecosystems. It is essential to continue efforts to maintain resilient, biodiverse ecosystems and avoid large-scale disturbances that would release large amounts of carbon in PAs. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110554
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, United States; Departments of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, United States; Pacific Northwest National Laboratory, Joint Global Change Research Institute, College Park, MD, United States; Department Tapada da Ajuda, Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
Recommended Citation:
Lu X.,Zhou Y.,Liu Y.,et al. The role of protected areas in land use/land cover change and the carbon cycle in the conterminous United States[J]. Global Change Biology,2018-01-01,24(2)