No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau
Alpine grassland soils store large amounts of soil organic carbon (SOC) and are susceptible to rising air temperature. Soil extracellular enzymes catalyze the rate-limiting step in SOC decomposition and their catalysis, production and degradation rates are regulated by temperature. Therefore, the re...
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ftchinacascnwipb:oai:210.75.249.4:363003/4289 2023-05-15T15:19:01+02:00 No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau Jing, Xin Wang, Yonghui Chung, Haegeun Mi, Zhaorong Wang, Shiping Zeng, Hui He, Jin-Sheng 2014 http://210.75.249.4/handle/363003/4289 英语 eng BIOGEOCHEMISTRY Jing, X; Wang, YH; Chung, HG; Mi, ZR; Wang, SP; Zeng, H; He, JS.No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau,BIOGEOCHEMISTRY,2014,117(1):39 http://210.75.249.4/handle/363003/4289 6 Global Warming Temperature Acclimation Soil Extracellular Enzyme Activity q(10) Alpine Grassland Tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences CARBON-CYCLE FEEDBACKS MICROBIAL COMMUNITY STRUCTURE ARCTIC TUNDRA SOILS BOREAL FOREST SOILS CLIMATE-CHANGE ORGANIC-CARBON THERMODYNAMIC PARAMETERS ELEVATED-TEMPERATURE NITROGEN DEPOSITION THERMAL ADAPTATION Environmental Sciences & Ecology Geology Environmental Sciences Geosciences Multidisciplinary Article 期刊论文 2014 ftchinacascnwipb 2023-03-26T20:23:02Z Alpine grassland soils store large amounts of soil organic carbon (SOC) and are susceptible to rising air temperature. Soil extracellular enzymes catalyze the rate-limiting step in SOC decomposition and their catalysis, production and degradation rates are regulated by temperature. Therefore, the responses of these enzymes to warming could have a profound impact on carbon cycling in the alpine grassland ecosystems. This study was conducted to measure the responses of soil extracellular enzyme activity and temperature sensitivity (Q(10)) to experimental warming in samples from an alpine grassland ecosystem on the Tibetan Plateau. A free air-temperature enhancement system was set up in May 2006. We measured soil microbial biomass, nutrient availability and the activity of five extracellular enzymes in 2009 and 2010. The Q(10) of each enzyme was calculated using a simple first-order exponential equation. We found that warming had no significant effects on soil microbial biomass C, the labile C or N content, or nutrient availability. Significant differences in the activity of most extracellular enzymes among sampling dates were found, with typically higher enzyme activity during the warm period of the year. The effects of warming on the activity of the five extracellular enzymes at 20 A degrees C were not significant. Enzyme activity in vitro strongly increased with temperature up to 27 A degrees C or over 30 A degrees C (optimum temperature; T-opt). Seasonal variations in the Q(10) were found, but the effects of warming on Q(10) were not significant. We conclude that soil extracellular enzymes adapted to seasonal temperature variations, but did not acclimate to the field experimental warming. Alpine grassland soils store large amounts of soil organic carbon (SOC) and are susceptible to rising air temperature. Soil extracellular enzymes catalyze the rate-limiting step in SOC decomposition and their catalysis, production and degradation rates are regulated by temperature. Therefore, the responses of these enzymes ... Article in Journal/Newspaper Arctic Climate change Global warming 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 |
Global Warming Temperature Acclimation Soil Extracellular Enzyme Activity q(10) Alpine Grassland Tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences CARBON-CYCLE FEEDBACKS MICROBIAL COMMUNITY STRUCTURE ARCTIC TUNDRA SOILS BOREAL FOREST SOILS CLIMATE-CHANGE ORGANIC-CARBON THERMODYNAMIC PARAMETERS ELEVATED-TEMPERATURE NITROGEN DEPOSITION THERMAL ADAPTATION Environmental Sciences & Ecology Geology Environmental Sciences Geosciences Multidisciplinary |
spellingShingle |
Global Warming Temperature Acclimation Soil Extracellular Enzyme Activity q(10) Alpine Grassland Tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences CARBON-CYCLE FEEDBACKS MICROBIAL COMMUNITY STRUCTURE ARCTIC TUNDRA SOILS BOREAL FOREST SOILS CLIMATE-CHANGE ORGANIC-CARBON THERMODYNAMIC PARAMETERS ELEVATED-TEMPERATURE NITROGEN DEPOSITION THERMAL ADAPTATION Environmental Sciences & Ecology Geology Environmental Sciences Geosciences Multidisciplinary Jing, Xin Wang, Yonghui Chung, Haegeun Mi, Zhaorong Wang, Shiping Zeng, Hui He, Jin-Sheng No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau |
topic_facet |
Global Warming Temperature Acclimation Soil Extracellular Enzyme Activity q(10) Alpine Grassland Tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences CARBON-CYCLE FEEDBACKS MICROBIAL COMMUNITY STRUCTURE ARCTIC TUNDRA SOILS BOREAL FOREST SOILS CLIMATE-CHANGE ORGANIC-CARBON THERMODYNAMIC PARAMETERS ELEVATED-TEMPERATURE NITROGEN DEPOSITION THERMAL ADAPTATION Environmental Sciences & Ecology Geology Environmental Sciences Geosciences Multidisciplinary |
description |
Alpine grassland soils store large amounts of soil organic carbon (SOC) and are susceptible to rising air temperature. Soil extracellular enzymes catalyze the rate-limiting step in SOC decomposition and their catalysis, production and degradation rates are regulated by temperature. Therefore, the responses of these enzymes to warming could have a profound impact on carbon cycling in the alpine grassland ecosystems. This study was conducted to measure the responses of soil extracellular enzyme activity and temperature sensitivity (Q(10)) to experimental warming in samples from an alpine grassland ecosystem on the Tibetan Plateau. A free air-temperature enhancement system was set up in May 2006. We measured soil microbial biomass, nutrient availability and the activity of five extracellular enzymes in 2009 and 2010. The Q(10) of each enzyme was calculated using a simple first-order exponential equation. We found that warming had no significant effects on soil microbial biomass C, the labile C or N content, or nutrient availability. Significant differences in the activity of most extracellular enzymes among sampling dates were found, with typically higher enzyme activity during the warm period of the year. The effects of warming on the activity of the five extracellular enzymes at 20 A degrees C were not significant. Enzyme activity in vitro strongly increased with temperature up to 27 A degrees C or over 30 A degrees C (optimum temperature; T-opt). Seasonal variations in the Q(10) were found, but the effects of warming on Q(10) were not significant. We conclude that soil extracellular enzymes adapted to seasonal temperature variations, but did not acclimate to the field experimental warming. Alpine grassland soils store large amounts of soil organic carbon (SOC) and are susceptible to rising air temperature. Soil extracellular enzymes catalyze the rate-limiting step in SOC decomposition and their catalysis, production and degradation rates are regulated by temperature. Therefore, the responses of these enzymes ... |
format |
Article in Journal/Newspaper |
author |
Jing, Xin Wang, Yonghui Chung, Haegeun Mi, Zhaorong Wang, Shiping Zeng, Hui He, Jin-Sheng |
author_facet |
Jing, Xin Wang, Yonghui Chung, Haegeun Mi, Zhaorong Wang, Shiping Zeng, Hui He, Jin-Sheng |
author_sort |
Jing, Xin |
title |
No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau |
title_short |
No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau |
title_full |
No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau |
title_fullStr |
No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau |
title_full_unstemmed |
No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau |
title_sort |
no temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the tibetan plateau |
publishDate |
2014 |
url |
http://210.75.249.4/handle/363003/4289 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Global warming Tundra |
genre_facet |
Arctic Climate change Global warming Tundra |
op_relation |
BIOGEOCHEMISTRY Jing, X; Wang, YH; Chung, HG; Mi, ZR; Wang, SP; Zeng, H; He, JS.No temperature acclimation of soil extracellular enzymes to experimental warming in an alpine grassland ecosystem on the Tibetan Plateau,BIOGEOCHEMISTRY,2014,117(1):39 http://210.75.249.4/handle/363003/4289 |
op_rights |
6 |
_version_ |
1766349213383262208 |