Effect of micro-environment in ridge and southern slope on soil respiration in Quercus mongolica forest
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Background: Soil respiration (Rs) is a major factor of the absorption and accumulation of carbon through photosynthesis in the ecosystem carbon cycle. This directly affects the amount of net ecosystem productivity, which affects the stability and sustainability of the ecosystem. Understanding the characteristics of Rs is indispensable to scientifically understand the carbon cycle of ecosystems. It is very important to study Rs characteristics through analysis of environmental factors closely related to Rs. Rs is affected by various environmental factors, such as temperature, precipitation, soil moisture, litter supply, organic matter content, dominant plant species, and soil disturbance. This study was conducted to analyze the effects of micro-topographical differences on Rs in forest vegetation by measuring the Rs on the ridge and southern slope sites of the broadly established Quercus mongolica forest in the central Korean area. Method: Rs, Ts, and soil moisture data were collected at the southern slope and ridge of the Q. mongolica forest in the Mt. Jeombong area in order to investigate the effects of topographical differences on Rs. Rs was collected by the closed chamber method, and data collection was performed from May 2011 to October 2013, except Winter seasons from November to April or May. For collecting the raw data of Rs in the field, acrylic collars were placed at the ridge and southern slope of the forest. The accumulated surface litter and the soil organic matter content (SOMC) were measured to a 5 cm depth. Based on these data, the Rs characteristics of the slope and ridge were analyzed. Results: Rs showed a distinct seasonal variation pattern in both the ridge and southern slope sites. In addition, Rs showed a distinct seasonal variation with high and low Ts changes. The average Rs measurements for the two sites, except for the Winter periods that were not measured, were 550.1 mg CO2 m−2 h−1 at the ridge site and 289.4 mg CO2 m−2 h− 1 at the southern slope, a difference of 52.6%. There was no significant difference in the Rs difference between slopes except for the first half of 2013, and both sites showed a tendency to increase exponentially as Ts increased. In addition, although the correlation is low, the difference in Rs between sites tended to increase as Ts increased. SMC showed a large fluctuation at the southern slope site relative to the ridge site, as while it was very low in 2013, it was high in 2011 and 2012. The accumulated litter of the soil surface and the SOMC at the depth range of 0~5 cm were 874 g m− 2 and 23.3% at the ridge site, and 396 g m−2 and 19.9% at the southern slope site. Conclusions: In this study, Rs was measured for the ridge and southern slope sites, which have two different results where the surface litter layer is disturbed by strong winds. The southern slope site shows that the litter layer formed in autumn due to strong winds almost disappeared, and while in the ridge site, it became thick due to the transfer of litter from the southern slope site. The mean Rs was about two times higher in the ridge site compared to that in the southern slope site. The Rs difference seems to be due to the difference in the amount of litter accumulated on the soil surface. As a result, the litter layer supplied to the soil surface is disturbed due to the micro-topographical difference, as the slope and the change of the community structure due to the plant season cause heterogeneity of the litter layer development, which in turn affects SMC and Rs. Therefore, it is necessary to introduce and understand these micro-topographical features and mechanisms when quantifying and analyzing the Rs of an ecosystem.
Abstract
Background: Soil respiration (Rs) is a major factor of the absorption and accumulation of carbon through photosynthesis in the ecosystem carbon cycle. This directly affects the amount of net ecosystem productivity, which affects the stability and sustainability of the ecosystem. Understanding the characteristics of Rs is indispensable to scientifically understand the carbon cycle of ecosystems. It is very important to study Rs characteristics through analysis of environmental factors closely related to Rs. Rs is affected by various environmental factors, such as temperature, precipitation, soil moisture, litter supply, organic matter content, dominant plant species, and soil disturbance. This study was conducted to analyze the effects of micro-topographical differences on Rs in forest vegetation by measuring the Rs on the ridge and southern slope sites of the broadly established Quercus mongolica forest in the central Korean area. Method: Rs, Ts, and soil moisture data were collected at the southern slope and ridge of the Q. mongolica forest in the Mt. Jeombong area in order to investigate the effects of topographical differences on Rs. Rs was collected by the closed chamber method, and data collection was performed from May 2011 to October 2013, except Winter seasons from November to April or May. For collecting the raw data of Rs in the field, acrylic collars were placed at the ridge and southern slope of the forest. The accumulated surface litter and the soil organic matter content (SOMC) were measured to a 5 cm depth. Based on these data, the Rs characteristics of the slope and ridge were analyzed. Results: Rs showed a distinct seasonal variation pattern in both the ridge and southern slope sites. In addition, Rs showed a distinct seasonal variation with high and low Ts changes. The average Rs measurements for the two sites, except for the Winter periods that were not measured, were 550.1 mg CO2 m−2 h−1 at the ridge site and 289.4 mg CO2 m−2 h− 1 at the southern slope, a difference of 52.6%. There was no significant difference in the Rs difference between slopes except for the first half of 2013, and both sites showed a tendency to increase exponentially as Ts increased. In addition, although the correlation is low, the difference in Rs between sites tended to increase as Ts increased. SMC showed a large fluctuation at the southern slope site relative to the ridge site, as while it was very low in 2013, it was high in 2011 and 2012. The accumulated litter of the soil surface and the SOMC at the depth range of 0~5 cm were 874 g m− 2 and 23.3% at the ridge site, and 396 g m−2 and 19.9% at the southern slope site. Conclusions: In this study, Rs was measured for the ridge and southern slope sites, which have two different results where the surface litter layer is disturbed by strong winds. The southern slope site shows that the litter layer formed in autumn due to strong winds almost disappeared, and while in the ridge site, it became thick due to the transfer of litter from the southern slope site. The mean Rs was about two times higher in the ridge site compared to that in the southern slope site. The Rs difference seems to be due to the difference in the amount of litter accumulated on the soil surface. As a result, the litter layer supplied to the soil surface is disturbed due to the micro-topographical difference, as the slope and the change of the community structure due to the plant season cause heterogeneity of the litter layer development, which in turn affects SMC and Rs. Therefore, it is necessary to introduce and understand these micro-topographical features and mechanisms when quantifying and analyzing the Rs of an ecosystem.
참고문헌 (29)
- 채남이, "Annual Variation of Soil Respiration and Precipitation in a Temperate Forest (Quercus serrata and Carpinus laxiflora) Under East Asian Monsoon Climate", Journal of Plant Biology(한국식물학회지), 54(2), pp.101~111 (2011), 한국식물학회
- Davidson EA, "Soil water content and temperature as independent or confounded factors controlling soil respiration in a temperature mixed hardwood forest", Glob Chang Biol, 4, pp.217~227 (1998)
- Doran J, "Microbial activity as regulated by soil water-filled pore space", Transactions 14th International Congress of Soil Science, pp.94~99 (1990), International Society of Soil Sci
- 엄지영, "Long-term characteristics of soil respiration in a Korean cool-temperate deciduous forest in a monsoon climate", Animal Cells and Systems, 22(2), pp.100~108 (2018), 한국통합생물학회[DOI]
- Epron D, "Spatial variation of soil respiration across a topographic gradient in a tropical rain forest in French Guiana", 22, pp.565~574 (2006)
- 정석희, "Effect of rainfall events on soil carbon flux in mountain pastures", Journal of Ecology and Environment, 41(11), pp.302~309 (2017), 한국생태학회[DOI]
- 정석희, "Characteristics of accumulated soil carbon and soil respiration in temperate deciduous forest and alpine pastureland", Journal of Ecology and Environment, 42(1), pp.20~29 (2018), 한국생태학회[DOI]
- 김광택, "TWINSPAN에 의해 분류된 점봉산 일대 천연 활엽수림의 군락구조 해석", 한국산림과학회지, 91(4), pp.523~534 (2002), 한국산림과학회
- Joo SJ, "Estimation of soil respiration using automated chamber systems in an oak (Quercus mongolica) forest at the Nam-San site in Seoul, Korea", J Sci Total Environ, 416, pp.400~409 (2012)
- Kang SK, "Topographic climatic controls on soil respiration in six temperate mixed-hardwood forest slopes, Korea", Glob Chang Biol, 9, pp.1427~1437 (2003)
- 김경순, "Ecological comparison of Mongolian oak (Quercus mongolica Fisch. ex Ledeb.) community between Mt. Nam and Mt. Jeombong as a Long Term Ecological Research (LTER) site", Journal of Ecology and Environment, 34(1), pp.75~85 (2011), 한국생태학회
- Kishimoto-Mo A, "Contribution of soil moisture to seasonal and annual variations of soil CO2efflux in a humid cool-temperate oak-birch forest in Central Japan", Ecol Res, 30, pp.311~325 (2015)
- 이재석, "Relationship of root biomass and soil respiration in a stand of deciduous broadleaved trees—a case study in a maple tree", Journal of Ecology and Environment, 42(4), pp.155~162 (2018), 한국생태학회[DOI]
- Liu X, "Response of soil CO2 efflux to water manipulation in a tallgrass prairie ecosystem", Plant Soil, 240, pp.213~223 (2002)
- Lloyd J, "On the temperature dependence of soil respiration", Funct Ecol, 8, pp.315~323 (1994)
- Luo Y, "Elevated CO2 increase belowground respiration in California grasslands", Oecologia, 108, pp.130~137 (1996)
- Maier CA, "Soil CO2 evolution and root respiration in 11 year-old loblolly pine (Pinus taeda) plantations ad affected by misture and nutrient availability", Can J For Res, 30, pp.347~359 (2000)
- Meentemeyer V, "The geography of organic decomposition rates", Ann Assoc Am Geogr, 74, pp.551~560 (1984)
- Ohashi M, "Temporal change in spatial variability of soil respiration on a slope of Japanese cedar (Cryptomeria japonica D. Don) forest", Soil Biol Biochem, 39, pp.1130~1138 (2007)
- Raich JW, "Global patterns of carbon dioxide emission from soil", Global Biochem Cycle, 9, pp.23~36 (1995)
- Raich JW, "The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate", Tellus, 44, pp.81~99 (1992)
- Raich JW, "Vegetation and soil respiration: correlations and controls", Biogeochem, 48, pp.71~90 (2000)
- Schlesinger WH, "Carbon balance in terrestrial detritus", Annu Rev Ecol Evol Syst, 8, pp.51~81 (1977)
- Singh JS, "Plant decomposition and soil respiration in terrestrial ecosystems", Bot Rev, 43, pp.449~529 (1977)
- Son YH, "Soil respiration in Pinus rigid and Larix leptolepis plantation", J Korea Forest Soci, 85(3), pp.469~505 (1996)
- Suh SU, "Temperature and moisture sensitivities of CO2 efflux from lowland and alpine meadow soils", J Plant Ecol, 2(4), pp.225~231 (2009)
- Wang C, "Soil respiration in six temperate forests in China", Glob Change Biol, 12, pp.2103~2114 (2006)
- Xu L, "How soil moisture, rain pulses, and growth alter the response of ecosystem respiration to temperature", Global Biogeochem Cycle, 18, pp.1029~1035 (2004)
- Zhu J, "Hydro-ecological functions of forest litter layers", J Beijing For Univ, 24, pp.30~34 (2002)