Comparative Analysis of Soil Respiration Dynamics and Heterotrophic Respiration Sensitivity to Warming in a Subalpine Coniferous Forest and a Subtropical Evergreen Broadleaf Forest in Southwest China

被引：4

作者：

Phyo, Zayar ^{[1
,3
,6
]}

Wu, Chuansheng ^{[1
,4
]}

Zhang, Yiping ^{[1
,2
,3
,9
]}

Sha, Liqing ^{[1
,2
,3
]}

Song, Qinghai ^{[1
,2
,3
]}

Liu, Yuntong ^{[1
,2
,3
]}

Liang, Naishen ^{[5
]}

Myo, Sai Tay Zar ^{[1
,3
,6
]}

Lu, Zhiyun ^{[1
,7
]}

Xu, Kung ^{[8
]}

Huang, Hua ^{[8
]}

Liu, Weiwei ^{[8
]}

Zhou, Wenjun ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Xishuangbanna 666303, Peoples R China

[2] Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Xishuangbanna 666303, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Fuyang Normal Univ, Anhui Prov Key Lab Environm Hormone & Reprod, Anhui Prov Key Lab Embryo Dev & Reprod Regulat, Fuyang 236037, Peoples R China

[5] Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki 3058506, Japan

[6] Minist Nat Resources & Environm Conservat, Myanma Timber Enterprise, Yangon, Myanmar

[7] Ailaoshan Stn Subtrop Forest Ecosyst Studies, Jingdong 676209, Yunnan, Peoples R China

[8] Chinese Acad Sci, Kunming Inst Bot, Lijiang Forest Ecosyst Res Stn, Kunming 650201, Peoples R China

[9] Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Global Change Res Grp, 88 Xuefu Rd, Kunming 650223, Yunnan, Peoples R China

来源：

JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION | 2024年 / 24卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Soil respiration; Heterotrophic respiration; Fractions; Temperature sensitivity; Warming effect; AUTOTROPHIC RESPIRATION; CO2; EFFLUX; TEMPERATURE SENSITIVITY; ORGANIC-CARBON; WATER CONTENT; COMPONENTS; ECOSYSTEMS; CLIMATE; FLUX; DECOMPOSITION;

D O I：

10.1007/s42729-024-01852-4

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

To quantify variations in the components of soil respiration (Rs), elucidate the impact of warming on heterotrophic respiration (Rh) in subalpine coniferous forest (LJ) and in subtropical evergreen broadleaf forest (ALS), and discern differences in the dominant regulating factors of soil respiration components between the two forest ecosystems. This study used multichannel automated soil efflux chambers with three treatments: control (CK), trenching (NR), and trenching with warming (NRW) in LJ and ALS in Southwest China. The results reveal that Rs was higher in ALS than in LJ, and the ratio of Rh to Rs was significantly higher in LJ than in ALS. Although soil temperature (ST) and soil moisture (SM) also identified the main controlling factors of Rs, Rh, Ra, and the warming effect of Rh when considering carbon cycle modeling, the sensitivity of Rs to temperature (Q10) was not significantly different between Rs, Rh, and Ra for both forests. The greater warming effect on Rh in LJ than in ALS is due to the combination of lower temperatures, recalcitrant organic matter, and slower litter decomposition in subalpine coniferous forests. This study confirmed that Rs, Rh and Ra had positive correlation with ST and SM for two ecosystems. This study has proven that the greater the warming effect of Rh is, the greater the contribution of Rh to Rs becomes, and the lesser the contribution of Ra to Rs in LJ becomes compared to that of ALS.

引用

页码：4522 / 4537

页数：16

共 87 条

[1] Sustained large stimulation of soil heterotrophic respiration rate and its temperature sensitivity by soil warming in a cool-temperate forested peatland [J].