Winter soil respiration during soil-freezing process in a boreal forest in Northeast China
Boreal forest is the largest and contains the most soil carbon among global terrestrial biomes. Soil respiration during the prolonged winter period may play an important role in the carbon cycles in boreal forests. This study aims to explore the characteristics of winter soil respiration in the bore...
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ftpekinguniv:oai:localhost:20.500.11897/322241 2023-05-15T18:31:00+02:00 Winter soil respiration during soil-freezing process in a boreal forest in Northeast China Du, Enzai Zhou, Zhang Li, Peng Jiang, Lai Hu, Xueyang Fang, Jingyun Fang, JY (reprint author), Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. 2013 https://hdl.handle.net/20.500.11897/322241 https://doi.org/10.1093/jpe/rtt012 en eng journal of plant ecology JOURNAL OF PLANT ECOLOGY.2013,6,(5),349-357. 812438 1752-9921 http://hdl.handle.net/20.500.11897/322241 doi:10.1093/jpe/rtt012 WOS:000324828500004 SCI soil respiration freezethaw critical point snow depth boreal forest winter TAIGA SOILS CO2 EFFLUX ECOLOGICAL PROCESSES MICROBIAL ACTIVITY TEMPERATE FORESTS EUROPEAN FORESTS CARBON BALANCE NITROUS-OXIDE THAW CYCLES Journal 2013 ftpekinguniv https://doi.org/20.500.11897/322241 https://doi.org/10.1093/jpe/rtt012 2021-08-01T09:37:54Z Boreal forest is the largest and contains the most soil carbon among global terrestrial biomes. Soil respiration during the prolonged winter period may play an important role in the carbon cycles in boreal forests. This study aims to explore the characteristics of winter soil respiration in the boreal forest and to show how it is regulated by environmental factors, such as soil temperature, soil moisture and snowpack. Soil respiration in an old-growth larch forest (Larix gmelinii Ruppr.) in Northeast China was intensively measured during the winter soil-freezing process in 2011 using an automated soil CO2 flux system. The effects of soil temperature, soil moisture and thin snowpack on soil respiration and its temperature sensitivity were investigated. Total soil respiration and heterotrophic respiration both showed a declining trend during the observation period, and no significant difference was found between soil respiration and heterotrophic respiration until the snowpack exceeded 20cm. Soil respiration was exponentially correlated with soil temperature and its temperature sensitivity (Q(10) value) for the entire measurement duration was 10.5. Snow depth and soil moisture both showed positive effects on the temperature sensitivity of soil respiration. Based on the change in the Q(10) value, we proposed a freezethaw critical point hypothesis, which states that the Q(10) value above freezethaw critical point is much higher than that below it (16.0 vs. 3.5), and this was probably regulated by the abrupt change in soil water availability during the soil-freezing process. Our findings suggest interactive effects of multiple environmental factors on winter soil respiration and recommend adopting the freezethaw critical point to model soil respiration in a changing winter climate. Plant Sciences Ecology SCI(E) 5 ARTICLE 5 349-357 6 Journal/Newspaper taiga Peking University Institutional Repository (PKU IR) Journal of Plant Ecology 6 5 349 357 |
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Open Polar |
collection |
Peking University Institutional Repository (PKU IR) |
op_collection_id |
ftpekinguniv |
language |
English |
topic |
soil respiration freezethaw critical point snow depth boreal forest winter TAIGA SOILS CO2 EFFLUX ECOLOGICAL PROCESSES MICROBIAL ACTIVITY TEMPERATE FORESTS EUROPEAN FORESTS CARBON BALANCE NITROUS-OXIDE THAW CYCLES |
spellingShingle |
soil respiration freezethaw critical point snow depth boreal forest winter TAIGA SOILS CO2 EFFLUX ECOLOGICAL PROCESSES MICROBIAL ACTIVITY TEMPERATE FORESTS EUROPEAN FORESTS CARBON BALANCE NITROUS-OXIDE THAW CYCLES Du, Enzai Zhou, Zhang Li, Peng Jiang, Lai Hu, Xueyang Fang, Jingyun Winter soil respiration during soil-freezing process in a boreal forest in Northeast China |
topic_facet |
soil respiration freezethaw critical point snow depth boreal forest winter TAIGA SOILS CO2 EFFLUX ECOLOGICAL PROCESSES MICROBIAL ACTIVITY TEMPERATE FORESTS EUROPEAN FORESTS CARBON BALANCE NITROUS-OXIDE THAW CYCLES |
description |
Boreal forest is the largest and contains the most soil carbon among global terrestrial biomes. Soil respiration during the prolonged winter period may play an important role in the carbon cycles in boreal forests. This study aims to explore the characteristics of winter soil respiration in the boreal forest and to show how it is regulated by environmental factors, such as soil temperature, soil moisture and snowpack. Soil respiration in an old-growth larch forest (Larix gmelinii Ruppr.) in Northeast China was intensively measured during the winter soil-freezing process in 2011 using an automated soil CO2 flux system. The effects of soil temperature, soil moisture and thin snowpack on soil respiration and its temperature sensitivity were investigated. Total soil respiration and heterotrophic respiration both showed a declining trend during the observation period, and no significant difference was found between soil respiration and heterotrophic respiration until the snowpack exceeded 20cm. Soil respiration was exponentially correlated with soil temperature and its temperature sensitivity (Q(10) value) for the entire measurement duration was 10.5. Snow depth and soil moisture both showed positive effects on the temperature sensitivity of soil respiration. Based on the change in the Q(10) value, we proposed a freezethaw critical point hypothesis, which states that the Q(10) value above freezethaw critical point is much higher than that below it (16.0 vs. 3.5), and this was probably regulated by the abrupt change in soil water availability during the soil-freezing process. Our findings suggest interactive effects of multiple environmental factors on winter soil respiration and recommend adopting the freezethaw critical point to model soil respiration in a changing winter climate. Plant Sciences Ecology SCI(E) 5 ARTICLE 5 349-357 6 |
author2 |
Fang, JY (reprint author), Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. |
format |
Journal/Newspaper |
author |
Du, Enzai Zhou, Zhang Li, Peng Jiang, Lai Hu, Xueyang Fang, Jingyun |
author_facet |
Du, Enzai Zhou, Zhang Li, Peng Jiang, Lai Hu, Xueyang Fang, Jingyun |
author_sort |
Du, Enzai |
title |
Winter soil respiration during soil-freezing process in a boreal forest in Northeast China |
title_short |
Winter soil respiration during soil-freezing process in a boreal forest in Northeast China |
title_full |
Winter soil respiration during soil-freezing process in a boreal forest in Northeast China |
title_fullStr |
Winter soil respiration during soil-freezing process in a boreal forest in Northeast China |
title_full_unstemmed |
Winter soil respiration during soil-freezing process in a boreal forest in Northeast China |
title_sort |
winter soil respiration during soil-freezing process in a boreal forest in northeast china |
publisher |
journal of plant ecology |
publishDate |
2013 |
url |
https://hdl.handle.net/20.500.11897/322241 https://doi.org/10.1093/jpe/rtt012 |
genre |
taiga |
genre_facet |
taiga |
op_source |
SCI |
op_relation |
JOURNAL OF PLANT ECOLOGY.2013,6,(5),349-357. 812438 1752-9921 http://hdl.handle.net/20.500.11897/322241 doi:10.1093/jpe/rtt012 WOS:000324828500004 |
op_doi |
https://doi.org/20.500.11897/322241 https://doi.org/10.1093/jpe/rtt012 |
container_title |
Journal of Plant Ecology |
container_volume |
6 |
container_issue |
5 |
container_start_page |
349 |
op_container_end_page |
357 |
_version_ |
1766214641929682944 |