Impact of climate factors on CO2 flux characteristics in a Larix gmelinii forest ecosystem

LI Xiao-mei; ZHANG Qiu-liang

doi:10.13332/j.1000-1522.20150020

Journal of Beijing Forestry University > 2015 > 37(8): 31-39. > DOI: 10.13332/j.1000-1522.20150020

LI Xiao-mei, ZHANG Qiu-liang. Impact of climate factors on CO2 flux characteristics in a Larix gmelinii forest ecosystem[J]. Journal of Beijing Forestry University, 2015, 37(8): 31-39. DOI: 10.13332/j.1000-1522.20150020

Citation:

PDF (963 KB)

Impact of climate factors on CO2 flux characteristics in a Larix gmelinii forest ecosystem

LI Xiao-mei,
ZHANG Qiu-liang^,

Forestry Institute of Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, P. R. China

More Information

Received Date: January 21, 2015
Revised Date: January 21, 2015
Published Date: August 30, 2015

Graphical Abstract

Abstract

Abstract

Using the open path eddy covariance technique, we measured and analyzed the CO2 flux characteristics related to climate variables in a Larix gmelinii forest ecosystem (hereinafter referred to as “the ecosystem”). The results showed that: 1) In the growing season, the ecosystem CO2 flux changes with a diurnal cycle. The system assimilates CO2 in daytime and releases CO2 at night. The assimilation reaches its peak between 12:30 and 13:30. The CO2 flux ranges from -1.09 to 0.11mg/(m2·s) during the day. In the non-growing season, the ecosystem shows a carbon source with the CO2 flux ranging from 0 to 0.3mg/(m2·s). 2) In the growing season, there is a logarithmic relationship between the CO2 flux and photosynthetic active radiation (R2=0.4861), and the carbon sequestration capacity increases with the enhancement of PAR; therefore, PAR is a factor affecting CO2 flux directly. In the non-growing season, such relationship is not significant. 3) The CO2 flux is well correlated with air temperature (ta) in growing seasons (R2 = 0.6272), and CO2 flux is reduced with the rising ta, suggesting that ta is a main limiting factor in the ecosystem. In the non-growing season from December to February, the change of air temperature has no significant effects on CO2 flux. 4) The influence of soil temperature (ts) and soil moisture content (RH) on CO2 flux is mainly reflected in ecosystem respiration(Re). The soil moisture content ranges between 62%-87% in the ecosystem, with an average of 84% in the growing season and 67% in the non-growing season. Soil moisture content is not the main factor limiting CO2 flux in the ecosystem. On condition that water is not the limiting factor, soil temperature plays the major role on regulating CO2 flux in the ecosystem. Our research shows that there exists an exponential relationship between CO2 flux and soil temperature (R2=0.2826 in growing season and 0.2223 in non-growing season). Within a certain range, the rise of soil temperature will accelerate the metabolism of plants and microorganisms, and thus enhance the respiration of forest ecosystem and promote the emission of CO2.
- Larix gmelinii,
- eddy covariance,
- CO2 flux,
- environmental factors

FullText(HTML)

References (47)

References

[1]	FALGE E, BALDOCCHI D, TENHUNEN J, et al. Seasonality of ecosystem respiration and gross primary production as derived from FLUXNET measurements[J]. Agricultural and Forest Meteorology, 2002, 113:53-74.
[1]	YU G R,NIU D,WANG Q F. Focal issues in the negotiation of united nations framework convention on climate change[J].Resources Science, 2001, 23(6):10-16.
[2]	FANG J Y,PU S L,ZHAO S Q.The role of the middle and high latitudes terrestrial ecosystems in the northern hemisphere[J].Phytoecologica Sinica, 2001, 26:594-602.
[2]	于贵瑞,牛栋,王秋凤.联合国气候变化框架公约谈判中的焦点问题[J].资源科学,2001,23(6):10-16.
[3]	WU J B,ZHANG Y S,GUAN D X. Methods and progress of research on CO 2 flux of forest ecosystem[J].Journal of Northeast Forestry University, 2003, 31(6):49-51.
[3]	方精云,朴世龙,赵淑清.CO 2 失汇与北半球中高纬度陆地生态系统的碳汇[J].植物生态学学报,2001,26:594-602.
[4]	ZHOU L Y. Carbon exchange of Chinese boreal forest during its growth season and related regulation mechanisms[J].Chinese Journal of Applied Ecology, 2010,21(20):2449-2456.
[4]	吴家兵,张玉书,关德新.森林生态系统CO 2 通量研究方法与进展[J].东北林业大学学报,2003,31(6):49-51.
[5]	YU C L,LIU D. Analysis CO 2 flux during growth season of natural broadleaved mixed forest in Xiaoxinganling Mountains[J].Chinese Journal of Agrometeorology, 2011,32(4):525-529.
[5]	周丽艳.中国北方针叶林生长季碳交换及其调控机制[J].应用生态学报,2010,21(20):2449-2456.
[6]	WANG Y,ZHOU G S,JIA B R,et al. Comparisons of carbon flux and its controls between broad Leaved Korean pine forest and Dahurian larch forest in northeast China[J].Ecologica Sinica, 2010,30(16):4376-4388.
[6]	于成龙,刘丹.小兴安岭天然阔叶混交林生长季 CO 2 通量特征分析[J].中国农业气象,2011,32(4): 525-529.
[7]	王宇,周广胜,贾丙瑞,等.中国东北地区阔叶红松林与兴安落叶松林的碳通量特征及其影响因子比较[J]. 生态学报,2010,30(16):4376-4388.
[7]	LI Y,LIU J M, QIN S L,et al. Daily variation of soil respiration in three typical stands in Daxing'an mountains in summer[J]. Journal of Northeast Forestry University,2011,39(10):65-80.
[8]	李勇,刘继明,秦世立,等.大兴安岭 3 种林分夏季土壤呼吸的日变化[J].东北林业大学学报,2011,39(10):65-80.
[8]	MENG C,WANG J,DI H T. Soil CO 2 flux in Betula platyphylla and Larix gmelini plantations and its main influence factors during growing season[J]. Journal of Northeast Forestry University,2011,39(4):56-70.
[9]	ZHAO G Y,LIU J S,WANG Y. Effects of elevated atmospheric CO 2 on carbon dynamics in soil-plant system[J]. Journal of Northeast Forestry University,2009,37(3):99-102.
[9]	孟春,王俭,狄海廷.白桦和落叶松人工林生长季节土壤CO 2 排放通量及主要影响因素[J].东北林业大学学报,2011,39(4):56-70.
[10]	赵光影,刘景双,王洋.CO 2 体积分数升高对土壤-植物系统碳过程的影响[J].东北林业大学学报,2009,37(3):99-102.
[10]	YANG J Y,WANG C K. Effects of soil temperature and moisture on soil surface CO 2 flux of forests in northeastern China[J]. Journal of Plant Ecology,2006,30(2):286-294.
[11]	杨金艳,王传宽.土壤水热条件对东北森林土壤表面CO 2 通量的影响[J].植物生态学报,2006, 30(2):286-294.
[11]	ZHAO Z H.A study on carbon flux between Chinese fir plantations and atmosphere in subtropical belts[D].Changsha: Central South University of Forestry and Technology, 2011.
[12]	HUANG H, ZHANG J S, MENG P, et al. Seasonal variation and meteorological control of CO 2 flux in a hilly plantation in the mountain areas of north China[J]. Meteorologica Sinica,2011,25(2):238-248.
[12]	WANG Y,PENG Z H,JIANG Z H. Characteristics of carbon flux of Populus forest in the reaches of Yangtze river in Hunan[J]. Forestry Science, 2009,45(11):156-160.
[13]	赵仲辉.亚热带杉木林生态系统与大气间的碳通量研究[D]. 长沙:中南林业科技大学,2011.
[13]	GENG S B. Study on the carbon flux observation over poplar plantation ecosystem of Xinping city in Henan province of China[D].Beijing: Beijing Forestry University, 2011.
[14]	ZHAO Z H,ZHANG L P,KANG W X,et al. Characteristics of CO 2 flux in a Chinese fir plantation ecosystem in Huitong County, Hunan Province[J]. Scientia Silvae Sinicae, 2011,47(11):6-12.
[14]	王妍,彭镇华,江泽慧,等.长江滩地杨树林生态系统的碳通量特征[J].林业科学,2009,45(11):156-160.
[15]	ZHOU L Y. Study on carbon flux and its controlling mechanisms in Chinese boreal forest ecosystem[D].Beijing: Beijing Forestry University, 2011.
[15]	耿绍波.河南西平杨树人工林生态系统碳通量及其环境响应研究[D].北京:北京林业大学,2011.
[16]	SHEN W Q. Carbon budgets of coniferous plantations in Qianyanzhou Experimental Station, Jiangxi, China[D].Beijing: Beijing Forestry University, 2006.
[16]	赵仲辉,张利平,康文星,等.湖南会同杉木人工林生态系统CO 2 通量特征[J].林业科学,2011,47(11):6-12.
[17]	YU G R,SUN X M. The principle and method of terrestrial ecosystem flux measurements[M]. Beijing: Higher Education Press, 2006.
[17]	周丽艳. 中国北方针叶林生态系统碳通量及其影响机制研究[D]. 北京:北京林业大学,2011.
[18]	LIU Y,HU H B,LIU Z Q. CO 2 flux characteristics of an secondary oak forest ecosystem in Non-growing seasons in Northern subtropics,China[J]. Journal of Northeast Forestry University, 2013, 41(7):22-27.
[18]	WILCZAK J M,ONCLEY S P,STAGE S A. Sonic anemometer tilt correction algorithms[J]. Boundary Layer Meteorology, 2001, 99:127-150.
[19]	LI C, HU H B. Response mechanism between carbon flux and asymmetrial environmental factors in secondaryoak forest ecosytem[J]. Jounal of Central South University of Forestry and Technology,2012,32(9):94-101.
[19]	WEBB E K, PEARMAN G, LEUNING R. Correction of flux measurements for density effects due to heat and water vapor transfer[J]. Quarterly Journal of the Royal Meteorological Society, 1980, 106(447):85-100.
[20]	YU G R, SUN X M. Flux measurement and research of terrestrial ecosystem in China[M]. Beijing:Science Press, 2008.
[20]	沈文清.江西千烟洲人工针叶林生态系统碳收支研究[D].北京: 北京林业大学,2006.
[21]	FALGE E, BALDOCCHI D, OLSON R O,et al. Gap filling strategies for defensible annual sums of net ecosystem exchange[J]. Agricultural and Forest Meteorology, 2001,107(1):43-69.
[22]	ZHANG L M ,Gap filling and partitioning[R]. Beijing: China Flux Training Course, 2009.
[23]	于贵瑞,孙晓敏. 陆地生态系统通量观测的原理与方法[M].北京: 高等教育出版社,2006.
[24]	FANG J Y , WANG G G, LIU G H , et al. Forest biomass of China: an estimate based on the biomass-volume relationship[J]. Ecological Applications, 1998,8:1084-1091.
[25]	刘乙,胡海波,刘准桥.北亚热带次生栎林生态系统非生长季CO 2 通量特征[J].东北林业大学学报,2013,41(7):22-27.
[26]	李超,胡海波.次生栎林生态系统碳通量与环境因子非对称相应机制[J].中南林业科技大学学报,2012,32(9):94-101.
[27]	于贵瑞,孙晓敏.中国陆地生态系统碳通量观测技术及时空变化特征[M].北京:科学出版社,2008.

Cited By

Get Citation

PDF

XML

Article views (1989) PDF downloads (35)

Turn off MathJax

Article Contents

Abstract

References

Impact of climate factors on CO2 flux characteristics in a Larix gmelinii forest ecosystem

Abstract

References

Catalog

Export File

Citation

Format

Content