Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors
Open, Grass- and Forb-Dominated (OGFD) ecosystems, including tundra, tropical grasslands and savanna, provide habitat for both wild and domesticated large ungulate herbivores. These ecosystems exist across a wide temperature gradient from the Arctic regions to the Equator, but are confined to a narr...
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ftdoajarticles:oai:doaj.org/article:d7aa2a4a66b143f79b7bda9aeff6403b 2023-05-15T14:55:46+02:00 Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors Qingzhu Gao Mark W. Schwartz Wenquan Zhu Yunfan Wan Xiaobo Qin Xin Ma Shuo Liu Matthew A. Williamson Casey B. Peters Yue Li 2016-05-01T00:00:00Z https://doi.org/10.3390/rs8050384 https://doaj.org/article/d7aa2a4a66b143f79b7bda9aeff6403b EN eng MDPI AG http://www.mdpi.com/2072-4292/8/5/384 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs8050384 https://doaj.org/article/d7aa2a4a66b143f79b7bda9aeff6403b Remote Sensing, Vol 8, Iss 5, p 384 (2016) NDVI bioclimatic index stepwise multiple regression grassland savanna tundra Science Q article 2016 ftdoajarticles https://doi.org/10.3390/rs8050384 2022-12-31T15:16:59Z Open, Grass- and Forb-Dominated (OGFD) ecosystems, including tundra, tropical grasslands and savanna, provide habitat for both wild and domesticated large ungulate herbivores. These ecosystems exist across a wide temperature gradient from the Arctic regions to the Equator, but are confined to a narrow set of moisture conditions that range from arid deserts to forest-dominated systems. Primary productivity in OGFD ecosystems appears extremely sensitive to environmental change. We compared global trends in the annual maximum and mean values of the Normalized Difference Vegetation Index (NDVI) and identified the key bioclimatic indices that controlled OGFD productivity changes in various regions for the period from 1982 to 2011. We found significantly increased or decreased annual maximum NDVI values of 36.3% and 4.6% for OGFD ecosystems, respectively. Trends in the annual mean NDVI are similar for most OGFD ecosystems and show greater area decreases and smaller area increases than trends in the annual maximum NDVI in global OGFD ecosystems during the study period. Ecosystems in which the productivity significantly increased were distributed mainly in the Arctic, mid-eastern South America, central Africa, central Eurasia and Oceania, while those with decreasing trends in productivity were mainly on the Mongolian Plateau. Temperature increases tended to improve productivity in colder OGFD ecosystems; and precipitation is positively correlated with productivity changes in grassland and savannas, but negatively correlated with changes in the Arctic tundra. Simple bioclimatic indices explain 42% to 55% of productivity changes in OGFD systems worldwide, and the main climatic predictors of productivity differed significantly between regions. In light of future climate change, the findings of this study will help support management of global OGFD ecosystems. Article in Journal/Newspaper Arctic Climate change Tundra Directory of Open Access Journals: DOAJ Articles Arctic Remote Sensing 8 5 384 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
NDVI bioclimatic index stepwise multiple regression grassland savanna tundra Science Q |
spellingShingle |
NDVI bioclimatic index stepwise multiple regression grassland savanna tundra Science Q Qingzhu Gao Mark W. Schwartz Wenquan Zhu Yunfan Wan Xiaobo Qin Xin Ma Shuo Liu Matthew A. Williamson Casey B. Peters Yue Li Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors |
topic_facet |
NDVI bioclimatic index stepwise multiple regression grassland savanna tundra Science Q |
description |
Open, Grass- and Forb-Dominated (OGFD) ecosystems, including tundra, tropical grasslands and savanna, provide habitat for both wild and domesticated large ungulate herbivores. These ecosystems exist across a wide temperature gradient from the Arctic regions to the Equator, but are confined to a narrow set of moisture conditions that range from arid deserts to forest-dominated systems. Primary productivity in OGFD ecosystems appears extremely sensitive to environmental change. We compared global trends in the annual maximum and mean values of the Normalized Difference Vegetation Index (NDVI) and identified the key bioclimatic indices that controlled OGFD productivity changes in various regions for the period from 1982 to 2011. We found significantly increased or decreased annual maximum NDVI values of 36.3% and 4.6% for OGFD ecosystems, respectively. Trends in the annual mean NDVI are similar for most OGFD ecosystems and show greater area decreases and smaller area increases than trends in the annual maximum NDVI in global OGFD ecosystems during the study period. Ecosystems in which the productivity significantly increased were distributed mainly in the Arctic, mid-eastern South America, central Africa, central Eurasia and Oceania, while those with decreasing trends in productivity were mainly on the Mongolian Plateau. Temperature increases tended to improve productivity in colder OGFD ecosystems; and precipitation is positively correlated with productivity changes in grassland and savannas, but negatively correlated with changes in the Arctic tundra. Simple bioclimatic indices explain 42% to 55% of productivity changes in OGFD systems worldwide, and the main climatic predictors of productivity differed significantly between regions. In light of future climate change, the findings of this study will help support management of global OGFD ecosystems. |
format |
Article in Journal/Newspaper |
author |
Qingzhu Gao Mark W. Schwartz Wenquan Zhu Yunfan Wan Xiaobo Qin Xin Ma Shuo Liu Matthew A. Williamson Casey B. Peters Yue Li |
author_facet |
Qingzhu Gao Mark W. Schwartz Wenquan Zhu Yunfan Wan Xiaobo Qin Xin Ma Shuo Liu Matthew A. Williamson Casey B. Peters Yue Li |
author_sort |
Qingzhu Gao |
title |
Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors |
title_short |
Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors |
title_full |
Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors |
title_fullStr |
Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors |
title_full_unstemmed |
Changes in Global Grassland Productivity during 1982 to 2011 Attributable to Climatic Factors |
title_sort |
changes in global grassland productivity during 1982 to 2011 attributable to climatic factors |
publisher |
MDPI AG |
publishDate |
2016 |
url |
https://doi.org/10.3390/rs8050384 https://doaj.org/article/d7aa2a4a66b143f79b7bda9aeff6403b |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_source |
Remote Sensing, Vol 8, Iss 5, p 384 (2016) |
op_relation |
http://www.mdpi.com/2072-4292/8/5/384 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs8050384 https://doaj.org/article/d7aa2a4a66b143f79b7bda9aeff6403b |
op_doi |
https://doi.org/10.3390/rs8050384 |
container_title |
Remote Sensing |
container_volume |
8 |
container_issue |
5 |
container_start_page |
384 |
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