Long-term reindeer grazing limits warming-induced increases in CO 2 released by tundra heath soil: potential role of soil C quality. Väisänen, M., Sjögersten, S., Large, D., Drage, T., & Stark, S. Environmental Research Letters, 10(9):094020, 2015. ![Long-term reindeer grazing limits warming-induced increases in CO 2 released by tundra heath soil: potential role of soil C quality [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The current climate warming in the Arctic may increase the microbial degradation of vast pools of soil carbon (C); however, the temperature sensitivity of decomposition is often highly dependent on the quality of accumulated soil C. Grazing by reindeer ( Rangifer tarandus L.) substantially affects the dominant vegetation and often increases graminoids in relation to dwarf shrubs in ecosystems, but the effect of this vegetation shift on the soil C quality has not been previously investigated. We analyzed the soil C quality and rate of microbially mediated CO 2 release at different temperatures in long-term laboratory incubations using soils from lightly grazed dwarf shrub-dominated and heavily grazed graminoid-dominated tundra ecosystem. The soil C quality was characterized by solid-state cross-polarization magic angle spinning (CPMAS 13 C NMR) spectroscopy, which showed a higher relative proportion of carbohydrate C under light grazing and higher relative proportion of aliphatic not-O-substituted C under heavy grazing. Initial measurements showed lower temperature sensitivity of the CO 2 release in soils under light grazing compared with soil under heavy grazing, but the overall CO 2 release rate and its temperature sensitivity increased under light grazing as the soil incubation progressed. At the end of incubation, significantly more carbohydrate C had been lost in soils under light grazing compared with heavy grazing. These findings indicate that there may be a link between the grazer-induced effects on soil C quality and the potential of soils to release CO 2 to atmosphere. We suggest that vegetation shifts induced by grazing could influence the proportion of accumulated soil C that is vulnerable to microbial degradation under warming climate.
@article{vaisanen_long-term_2015,
title = {Long-term reindeer grazing limits warming-induced increases in {CO} 2 released by tundra heath soil: potential role of soil {C} quality},
volume = {10},
issn = {1748-9326},
shorttitle = {Long-term reindeer grazing limits warming-induced increases in {CO} 2 released by tundra heath soil},
url = {http://stacks.iop.org/1748-9326/10/i=9/a=094020},
doi = {10.1088/1748-9326/10/9/094020},
abstract = {The current climate warming in the Arctic may increase the microbial degradation of vast pools of soil carbon (C); however, the temperature sensitivity of decomposition is often highly dependent on the quality of accumulated soil C. Grazing by reindeer ( Rangifer tarandus L.) substantially affects the dominant vegetation and often increases graminoids in relation to dwarf shrubs in ecosystems, but the effect of this vegetation shift on the soil C quality has not been previously investigated. We analyzed the soil C quality and rate of microbially mediated CO 2 release at different temperatures in long-term laboratory incubations using soils from lightly grazed dwarf shrub-dominated and heavily grazed graminoid-dominated tundra ecosystem. The soil C quality was characterized by solid-state cross-polarization magic angle spinning (CPMAS 13 C NMR) spectroscopy, which showed a higher relative proportion of carbohydrate C under light grazing and higher relative proportion of aliphatic not-O-substituted C under heavy grazing. Initial measurements showed lower temperature sensitivity of the CO 2 release in soils under light grazing compared with soil under heavy grazing, but the overall CO 2 release rate and its temperature sensitivity increased under light grazing as the soil incubation progressed. At the end of incubation, significantly more carbohydrate C had been lost in soils under light grazing compared with heavy grazing. These findings indicate that there may be a link between the grazer-induced effects on soil C quality and the potential of soils to release CO 2 to atmosphere. We suggest that vegetation shifts induced by grazing could influence the proportion of accumulated soil C that is vulnerable to microbial degradation under warming climate.},
language = {en},
number = {9},
urldate = {2017-05-27},
journal = {Environmental Research Letters},
author = {Väisänen, Maria and Sjögersten, Sofie and Large, David and Drage, Trevor and Stark, Sari},
year = {2015},
keywords = {\#nosource},
pages = {094020},
}
Downloads: 0
{"_id":"9sdXrxjpcnfFm63G9","bibbaseid":"visnen-sjgersten-large-drage-stark-longtermreindeergrazinglimitswarminginducedincreasesinco2releasedbytundraheathsoilpotentialroleofsoilcquality-2015","author_short":["Väisänen, M.","Sjögersten, S.","Large, D.","Drage, T.","Stark, S."],"bibdata":{"bibtype":"article","type":"article","title":"Long-term reindeer grazing limits warming-induced increases in CO 2 released by tundra heath soil: potential role of soil C quality","volume":"10","issn":"1748-9326","shorttitle":"Long-term reindeer grazing limits warming-induced increases in CO 2 released by tundra heath soil","url":"http://stacks.iop.org/1748-9326/10/i=9/a=094020","doi":"10.1088/1748-9326/10/9/094020","abstract":"The current climate warming in the Arctic may increase the microbial degradation of vast pools of soil carbon (C); however, the temperature sensitivity of decomposition is often highly dependent on the quality of accumulated soil C. Grazing by reindeer ( Rangifer tarandus L.) substantially affects the dominant vegetation and often increases graminoids in relation to dwarf shrubs in ecosystems, but the effect of this vegetation shift on the soil C quality has not been previously investigated. We analyzed the soil C quality and rate of microbially mediated CO 2 release at different temperatures in long-term laboratory incubations using soils from lightly grazed dwarf shrub-dominated and heavily grazed graminoid-dominated tundra ecosystem. The soil C quality was characterized by solid-state cross-polarization magic angle spinning (CPMAS 13 C NMR) spectroscopy, which showed a higher relative proportion of carbohydrate C under light grazing and higher relative proportion of aliphatic not-O-substituted C under heavy grazing. Initial measurements showed lower temperature sensitivity of the CO 2 release in soils under light grazing compared with soil under heavy grazing, but the overall CO 2 release rate and its temperature sensitivity increased under light grazing as the soil incubation progressed. At the end of incubation, significantly more carbohydrate C had been lost in soils under light grazing compared with heavy grazing. These findings indicate that there may be a link between the grazer-induced effects on soil C quality and the potential of soils to release CO 2 to atmosphere. We suggest that vegetation shifts induced by grazing could influence the proportion of accumulated soil C that is vulnerable to microbial degradation under warming climate.","language":"en","number":"9","urldate":"2017-05-27","journal":"Environmental Research Letters","author":[{"propositions":[],"lastnames":["Väisänen"],"firstnames":["Maria"],"suffixes":[]},{"propositions":[],"lastnames":["Sjögersten"],"firstnames":["Sofie"],"suffixes":[]},{"propositions":[],"lastnames":["Large"],"firstnames":["David"],"suffixes":[]},{"propositions":[],"lastnames":["Drage"],"firstnames":["Trevor"],"suffixes":[]},{"propositions":[],"lastnames":["Stark"],"firstnames":["Sari"],"suffixes":[]}],"year":"2015","keywords":"#nosource","pages":"094020","bibtex":"@article{vaisanen_long-term_2015,\n\ttitle = {Long-term reindeer grazing limits warming-induced increases in {CO} 2 released by tundra heath soil: potential role of soil {C} quality},\n\tvolume = {10},\n\tissn = {1748-9326},\n\tshorttitle = {Long-term reindeer grazing limits warming-induced increases in {CO} 2 released by tundra heath soil},\n\turl = {http://stacks.iop.org/1748-9326/10/i=9/a=094020},\n\tdoi = {10.1088/1748-9326/10/9/094020},\n\tabstract = {The current climate warming in the Arctic may increase the microbial degradation of vast pools of soil carbon (C); however, the temperature sensitivity of decomposition is often highly dependent on the quality of accumulated soil C. Grazing by reindeer ( Rangifer tarandus L.) substantially affects the dominant vegetation and often increases graminoids in relation to dwarf shrubs in ecosystems, but the effect of this vegetation shift on the soil C quality has not been previously investigated. We analyzed the soil C quality and rate of microbially mediated CO 2 release at different temperatures in long-term laboratory incubations using soils from lightly grazed dwarf shrub-dominated and heavily grazed graminoid-dominated tundra ecosystem. The soil C quality was characterized by solid-state cross-polarization magic angle spinning (CPMAS 13 C NMR) spectroscopy, which showed a higher relative proportion of carbohydrate C under light grazing and higher relative proportion of aliphatic not-O-substituted C under heavy grazing. Initial measurements showed lower temperature sensitivity of the CO 2 release in soils under light grazing compared with soil under heavy grazing, but the overall CO 2 release rate and its temperature sensitivity increased under light grazing as the soil incubation progressed. At the end of incubation, significantly more carbohydrate C had been lost in soils under light grazing compared with heavy grazing. These findings indicate that there may be a link between the grazer-induced effects on soil C quality and the potential of soils to release CO 2 to atmosphere. We suggest that vegetation shifts induced by grazing could influence the proportion of accumulated soil C that is vulnerable to microbial degradation under warming climate.},\n\tlanguage = {en},\n\tnumber = {9},\n\turldate = {2017-05-27},\n\tjournal = {Environmental Research Letters},\n\tauthor = {Väisänen, Maria and Sjögersten, Sofie and Large, David and Drage, Trevor and Stark, Sari},\n\tyear = {2015},\n\tkeywords = {\\#nosource},\n\tpages = {094020},\n}\n\n\n\n","author_short":["Väisänen, M.","Sjögersten, S.","Large, D.","Drage, T.","Stark, S."],"key":"vaisanen_long-term_2015","id":"vaisanen_long-term_2015","bibbaseid":"visnen-sjgersten-large-drage-stark-longtermreindeergrazinglimitswarminginducedincreasesinco2releasedbytundraheathsoilpotentialroleofsoilcquality-2015","role":"author","urls":{"Paper":"http://stacks.iop.org/1748-9326/10/i=9/a=094020"},"keyword":["#nosource"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/circ-publications","dataSources":["nbqZWNnSmJwdJFEEB","Mdrhvw5KhxFbTbWoS"],"keywords":["#nosource"],"search_terms":["long","term","reindeer","grazing","limits","warming","induced","increases","released","tundra","heath","soil","potential","role","soil","quality","väisänen","sjögersten","large","drage","stark"],"title":"Long-term reindeer grazing limits warming-induced increases in CO 2 released by tundra heath soil: potential role of soil C quality","year":2015}