Characteristics of soil respiration temperature sensitivity in a Pinus/Betula mixed forest during periods of rising and falling temperatures under the Japanese monsoon climate
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
We studied temperature sensitivity characteristics of soil respiration during periods of rising and falling temperatures within a common temperature range. We measured soil respiration continuously through two periods (a period of falling temperature, from August 7, 2003 to October 13, 2003; and a period of rising temperature from May 2, 2004 to July 2,2004) using an open-top chamber technique. A clear exponential relationship was observed between soil temperature and soil respiration rate during both periods. However, the effects of soil water content were not significant, because the humid monsoon climate prevented soil drought, which would otherwise have limited soil respiration. We analyzed temperature sensitivity using the Q_(10) value and R_(ref) (reference respiration at the average temperature for the observation period) and found that these values tended to be higher during the period of rising temperature than during the period of falling temperature. In the absence of an effect on soil water content, several other factors could explain this phenomenon. Here, we discuss the factors that control temperature sensitivity of soil respiration during periods of rising and falling temperature, such as root respiration, root growth, root exudates, and litter supply. We also discuss how the contribution of these factors may vary due to different growth states or due to the effects of the previous season, despite a similar temperature range.
Abstract
We studied temperature sensitivity characteristics of soil respiration during periods of rising and falling temperatures within a common temperature range. We measured soil respiration continuously through two periods (a period of falling temperature, from August 7, 2003 to October 13, 2003; and a period of rising temperature from May 2, 2004 to July 2,2004) using an open-top chamber technique. A clear exponential relationship was observed between soil temperature and soil respiration rate during both periods. However, the effects of soil water content were not significant, because the humid monsoon climate prevented soil drought, which would otherwise have limited soil respiration. We analyzed temperature sensitivity using the Q_(10) value and R_(ref) (reference respiration at the average temperature for the observation period) and found that these values tended to be higher during the period of rising temperature than during the period of falling temperature. In the absence of an effect on soil water content, several other factors could explain this phenomenon. Here, we discuss the factors that control temperature sensitivity of soil respiration during periods of rising and falling temperature, such as root respiration, root growth, root exudates, and litter supply. We also discuss how the contribution of these factors may vary due to different growth states or due to the effects of the previous season, despite a similar temperature range.
참고문헌 (26)
- Almagro M, "Temperature dependence of soil CO2 efflux is strongly modulated by seasonal patterns of moisture availability in a Mediterranean ecosystem", Soil Biol Biochem, 41, pp.594~605 (2009)
- Chen B, "Annual and seasonal variations of Q10 soil respiration in the sub-alpine forests of the Eastern Qinghai-Tibet Plateau, China", Soil Biol Biochem, 42, pp.1735~1742 (2010)
- Curiel Yuste J, "Annual Q10 of soil respiration reflects plant phenological patterns as well as temperature sensitivity", Glob Change Biol, 10, pp.161~169 (2004)
- Curiel Yuste J, "Calibration and validation of an empirical approach to model soil CO2 efflux in a deciduous forest", Biogeochemistry, 73, pp.209~230 (2005)
- Dakora FD, "Root exudates as mediators of mineral acquisition in low-nutrient environments", Plant Soil, 245, pp.35~47 (2002)
- Davidson EA, "Soil water content and temperature as independent or confounded factors controlling soil respiration in a temperate mixed hardwood forest", Glob Change Biol, 4, pp.217~227 (1998)
- Davidson EA, "Temperature sensitivity of soil carbon decomposition and feedbacks to climate change", Nature, 440, pp.165~173 (2006)
- Fang C, "An open-top chamber for measuring soil respiration and the influence of pressure difference on CO2 efflux measurement", Funct Ecol, 12, pp.319~325 (1998)
- Hanson PJ, "Separating root and soil microbial contributions to soil respiration: a review of methods and observations", Biogeochemistry, 48, pp.115~146 (2000)
- Janssens IA, "Large seasonal changes in Q10 of soil respiration in a beech forest", Glob Change Biol, 9, pp.911~918 (2003)
- Johnson IR, "Temperature dependence of plant and crop processes", Ann Bot, 55, pp.1~24 (1985)
- Kirschbaum MUF, "The temperature dependence of soil organic matter decomposition, and the effect of global warming on soil organic C storage", Soil Biol Biochem, 27, pp.753~760 (1995)
- Lomander A, "Modelling the effects of temperature and moisture on CO2 evolution from top- and subsoil using a multi-compartment approach", Soil Biol Biochem, 30, pp.2023~2030 (1998)
- Mariko S, "In situ measurement of soil respiration using the open-top chamber technique", J Jpn Agric Syst Soc, 19, pp.160~165 (2003)
- Mo W, "Seasonal and annual variations in soil respiration in a cool-temperate deciduous broad-leaved forest in Japan", Agric For Meteorol, 134, pp.81~94 (2005)
- Moncrieff JB, "A model for soil CO2 production and transport: 2. application to a Florida Pinus elliotte plantation", Agric For Meteorol, 95, pp.237~256 (1999)
- Noguchi K, "Estimating the production and mortality of fine roots in a Japanese cedar (Cryptomeria japonica D. Don) plantation using a minirhizotron technique", J For Res, 10, pp.435~441 (2005)
- Oe Y, "Seasonal variation in CH4 uptake and CO2 emission in Japanese temperate deciduous forest soil. In: Global Climate Change and Response of Carbon Cycle in the Equatorial Pacific and Indian Oceans and Adjacent Landmasses, Vol. 73", pp.445~463 (2005), Elsevier
- Osono T, "Decomposition of organic chemical components in relation to nitrogen dynamics in leaf litter of 14 tree species in a cool temperate forest", Ecol Res, 20, pp.41~49 (2005)
- Plillips SC, "Interannual, seasonal, and diel variation in soil respiration relative to ecosystem respiration at a wetland to upland slope at Harvard Forest", J Geophys Res, 115 (2010)
- Rayment MB, "Temporal and spatial variation of soil CO2 efflux in a Canadian boreal forest", Soil Biol Biochem, 32, pp.35~45 (2000)
- Schlesinger W, "Soil respiration and the global carbon cycle", Biogeochem, 48, pp.7~20 (2000)
- Smit AL, "Root Methods: A Handbook", pp.175~210 (2000), Springer-Verlag
- Swanson RV, "Environmental regulation of carbon dioxide exchange at the forest floor in a boreal black spruce ecosystem", Agric For Meteorol, 108, pp.165~181 (2001)
- Winkler JP, "The Q10 relationship of microbial respiration in a temperate forest soil", Soil Biol Biochem, 28, pp.1067~1072 (1996)
- Xu M, "Spatial and seasonal variations of Q10 determined by soil respiration measurements at a Sierra Nevadan forest", Glob Biogeochem Cycles, 15, pp.687~696 (2001)