Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau
We investigated experimental warming and simulated grazing ( clipping) effects on rangeland quality, as indicated by vegetation production and nutritive quality, in winter-grazed meadows and summer- grazed shrublands on the Tibetan Plateau, a rangeland system experiencing climatic and pastoral land...
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ftchinacascnwipb:oai:210.75.249.4:363003/1283 2023-05-15T15:18:41+02:00 Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau Klein, Julia A. Harte, John Zhao, Xin-Quan 2007-03-01 http://ir.nwipb.ac.cn/handle/363003/1283 英语 eng ECOLOGICAL APPLICATIONS Klein Julia A, Harte John,Zhao XinQuan.Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau.ECOLOGICAL APPLICATIONS,2007,17(2):541-557 http://ir.nwipb.ac.cn/handle/363003/1283 Climate Warming Experimental Warming Forage Quality Global Change Grazing Pastoralism Productivity Rangelands Tibetan Plateau Tundra 生物科学 Science & Technology Life Sciences & Biomedicine SUMMER TEMPERATURE MEADOW ECOSYSTEM PLANT-RESPONSES CLIMATE-CHANGE ARCTIC TUNDRA ALPINE TUNDRA ICE CORES CARBON VEGETATION NITROGEN Environmental Sciences & Ecology Ecology Environmental Sciences Article 期刊论文 2007 ftchinacascnwipb 2023-03-26T20:22:03Z We investigated experimental warming and simulated grazing ( clipping) effects on rangeland quality, as indicated by vegetation production and nutritive quality, in winter-grazed meadows and summer- grazed shrublands on the Tibetan Plateau, a rangeland system experiencing climatic and pastoral land use changes. Warming decreased total aboveground net primary productivity ( ANPP) by 40 g . m(-2) . yr(-1) at the meadow habitats and decreased palatable ANPP ( total ANPP minus non- palatable forb ANPP) by 10 g . m(-2) . yr(-1) at both habitats. The decreased production of the medicinal forb Gentiana straminea and the increased production of the non- palatable forb Stellera chamaejasme with warming also reduced rangeland quality. At the shrubland habitats, warming resulted in less digestible shrubs, whose foliage contains 25% digestible dry matter ( DDM), replacing more digestible graminoids, whose foliage contains 60% DDM. This shift from graminoids to shrubs not only results in lower- quality forage, but could also have important consequences for future domestic herd composition. Although warming extended the growing season in non- clipped plots, the reduced rangeland quality due to decreased vegetative production and nutritive quality will likely overwhelm the improved rangeland quality associated with an extended growing season.Grazing maintained or improved rangeland quality by increasing total ANPP by 20 - 40 g . m(-2) . yr(-1) with no effect on palatable ANPP. Grazing effects on forage nutritive quality, as measured by foliar nitrogen and carbon content and by shifts in plant group ANPP, resulted in improved forage quality. Grazing extended the growing season at both habitats, and it advanced the growing season at the meadows. Synergistic interactions between warming and grazing were present, such that grazing mediated the warming- induced declines in vegetation production and nutritive quality. Moreover, combined treatment effects were nonadditive, suggesting that we cannot predict the combined effect of ... Article in Journal/Newspaper Arctic Climate change Tundra Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences) Arctic |
institution |
Open Polar |
collection |
Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascnwipb |
language |
English |
topic |
Climate Warming Experimental Warming Forage Quality Global Change Grazing Pastoralism Productivity Rangelands Tibetan Plateau Tundra 生物科学 Science & Technology Life Sciences & Biomedicine SUMMER TEMPERATURE MEADOW ECOSYSTEM PLANT-RESPONSES CLIMATE-CHANGE ARCTIC TUNDRA ALPINE TUNDRA ICE CORES CARBON VEGETATION NITROGEN Environmental Sciences & Ecology Ecology Environmental Sciences |
spellingShingle |
Climate Warming Experimental Warming Forage Quality Global Change Grazing Pastoralism Productivity Rangelands Tibetan Plateau Tundra 生物科学 Science & Technology Life Sciences & Biomedicine SUMMER TEMPERATURE MEADOW ECOSYSTEM PLANT-RESPONSES CLIMATE-CHANGE ARCTIC TUNDRA ALPINE TUNDRA ICE CORES CARBON VEGETATION NITROGEN Environmental Sciences & Ecology Ecology Environmental Sciences Klein, Julia A. Harte, John Zhao, Xin-Quan Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau |
topic_facet |
Climate Warming Experimental Warming Forage Quality Global Change Grazing Pastoralism Productivity Rangelands Tibetan Plateau Tundra 生物科学 Science & Technology Life Sciences & Biomedicine SUMMER TEMPERATURE MEADOW ECOSYSTEM PLANT-RESPONSES CLIMATE-CHANGE ARCTIC TUNDRA ALPINE TUNDRA ICE CORES CARBON VEGETATION NITROGEN Environmental Sciences & Ecology Ecology Environmental Sciences |
description |
We investigated experimental warming and simulated grazing ( clipping) effects on rangeland quality, as indicated by vegetation production and nutritive quality, in winter-grazed meadows and summer- grazed shrublands on the Tibetan Plateau, a rangeland system experiencing climatic and pastoral land use changes. Warming decreased total aboveground net primary productivity ( ANPP) by 40 g . m(-2) . yr(-1) at the meadow habitats and decreased palatable ANPP ( total ANPP minus non- palatable forb ANPP) by 10 g . m(-2) . yr(-1) at both habitats. The decreased production of the medicinal forb Gentiana straminea and the increased production of the non- palatable forb Stellera chamaejasme with warming also reduced rangeland quality. At the shrubland habitats, warming resulted in less digestible shrubs, whose foliage contains 25% digestible dry matter ( DDM), replacing more digestible graminoids, whose foliage contains 60% DDM. This shift from graminoids to shrubs not only results in lower- quality forage, but could also have important consequences for future domestic herd composition. Although warming extended the growing season in non- clipped plots, the reduced rangeland quality due to decreased vegetative production and nutritive quality will likely overwhelm the improved rangeland quality associated with an extended growing season.Grazing maintained or improved rangeland quality by increasing total ANPP by 20 - 40 g . m(-2) . yr(-1) with no effect on palatable ANPP. Grazing effects on forage nutritive quality, as measured by foliar nitrogen and carbon content and by shifts in plant group ANPP, resulted in improved forage quality. Grazing extended the growing season at both habitats, and it advanced the growing season at the meadows. Synergistic interactions between warming and grazing were present, such that grazing mediated the warming- induced declines in vegetation production and nutritive quality. Moreover, combined treatment effects were nonadditive, suggesting that we cannot predict the combined effect of ... |
format |
Article in Journal/Newspaper |
author |
Klein, Julia A. Harte, John Zhao, Xin-Quan |
author_facet |
Klein, Julia A. Harte, John Zhao, Xin-Quan |
author_sort |
Klein, Julia A. |
title |
Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau |
title_short |
Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau |
title_full |
Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau |
title_fullStr |
Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau |
title_full_unstemmed |
Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau |
title_sort |
experimental warming, not grazing, decreases rangeland quality on the tibetan plateau |
publishDate |
2007 |
url |
http://ir.nwipb.ac.cn/handle/363003/1283 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_relation |
ECOLOGICAL APPLICATIONS Klein Julia A, Harte John,Zhao XinQuan.Experimental warming, not grazing, decreases rangeland quality on the Tibetan Plateau.ECOLOGICAL APPLICATIONS,2007,17(2):541-557 http://ir.nwipb.ac.cn/handle/363003/1283 |
_version_ |
1766348871185727488 |