Radiocarbon-Based Partitioning of Soil Respiration in an Old-Growth Coniferous Forest

被引:15
|
作者
Taylor, Adam J. [1 ]
Lai, Chun-Ta [1 ]
Hopkins, Francesca M. [2 ]
Wharton, Sonia [3 ]
Bible, Ken [4 ]
Xu, Xiaomei [2 ]
Phillips, Claire [5 ]
Bush, Susan [6 ]
Ehleringer, James R. [6 ]
机构
[1] San Diego State Univ, Dept Biol, San Diego, CA 92182 USA
[2] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA
[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[4] Univ Washington, Wind River Field Stn, Carson, WA 98610 USA
[5] Oregon State Univ, Dept Crops & Soil Sci, Corvallis, OR 97331 USA
[6] Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA
关键词
soil CO2 flux; radiocarbon; root respiration; residence time of soil carbon; stored carbon; photosynthates; TEMPERATE FOREST; MICROBIAL CONTRIBUTIONS; PACIFIC-NORTHWEST; RESIDENCE TIMES; ORGANIC-CARBON; CO2; EFFLUX; ALLOCATION; POOLS; ROOT; LEAF;
D O I
10.1007/s10021-014-9839-4
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Temperate forests play an important role in the global carbon cycle, and are thought to currently be a sink for atmospheric CO2. However, we lack understanding of the drivers of forest carbon accumulation and loss, hampering our ability to predict carbon cycle responses to global change. In this study, we used CO2 flux and radiocarbon (C-14) measurements to investigate the role of seasonal drivers on soil respiration. Radiocarbon measurements of CO2 evolved during incubation of fine roots and root-free soils at the beginning and end of the growing season (April and August) showed that these two soil respiration sources (fine roots vis-A -vis soils) have different mean residence times that stayed constant between seasons. Radiocarbon measurements show that root respiration was made up of carbon fixed 3-5 years prior to sampling, and that heterotrophic respiration was made up of carbon fixed 7-10 years prior. The difference in radiocarbon signature between the two sources allowed us to partition autotrophic and heterotrophic respiration sources for soil respiration measurements in the field. We observed a small but significant increase in a dagger C-14 of soil respiration between April and August, suggesting an increase in heterotrophic respiration sources over the growing season. Using a two end-member mixing model, we estimate that 55 +/- A 22% of soil respiration originated from autotrophic (root) sources in April, but their contribution dropped to 38 +/- A 21% in August. These findings suggest that the contribution of root respiration increases at a time of high productivity and/or as a result of relatively low microbial respiration in the early spring in this old-growth coniferous forest.
引用
收藏
页码:459 / 470
页数:12
相关论文
共 50 条
  • [1] Radiocarbon-Based Partitioning of Soil Respiration in an Old-Growth Coniferous Forest
    Adam J. Taylor
    Chun-Ta Lai
    Francesca M. Hopkins
    Sonia Wharton
    Ken Bible
    Xiaomei Xu
    Claire Phillips
    Susan Bush
    James R. Ehleringer
    Ecosystems, 2015, 18 : 459 - 470
  • [2] Soil respiration in an old-growth subtropical forest: Patterns, components, and controls
    Tan, Zheng-Hong
    Zhang, Yi-Ping
    Liang, Naishen
    Song, Qing-Hai
    Liu, Yu-Hong
    You, Guang-Yong
    Li, Lin-Hui
    Yu, Lei
    Wu, Chuan-Shen
    Lu, Zhi-Yun
    Wen, Han-Dong
    Zhao, Jun-Fu
    Gao, Fu
    Yang, Lian-Yan
    Song, Liang
    Zhang, Yong-Jiang
    Munemasa, Teramoto
    Sha, Li-Qing
    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2013, 118 (07) : 2981 - 2990
  • [3] COARSE WOODY DEBRIS AND FOREST FLOOR RESPIRATION IN AN OLD-GROWTH CONIFEROUS FOREST ON THE OLYMPIC PENINSULA, WASHINGTON, USA
    MARRA, JL
    EDMONDS, RL
    CANADIAN JOURNAL OF FOREST RESEARCH, 1994, 24 (09) : 1811 - 1817
  • [4] Radiocarbon-Based Assessment of Heterotrophic Soil Respiration in Two Mediterranean Forests
    Tommaso Chiti
    Giacomo Certini
    Claudia Forte
    Dario Papale
    Riccardo Valentini
    Ecosystems, 2016, 19 : 62 - 72
  • [5] Increased coniferous needle inputs accelerate decomposition of soil carbon in an old-growth forest
    Crow, Susan E.
    Lajtha, Kate
    Bowden, Richard D.
    Yano, Yuriko
    Brant, Justin B.
    Caldwell, Bruce A.
    Sulzman, Elizabeth W.
    FOREST ECOLOGY AND MANAGEMENT, 2009, 258 (10) : 2224 - 2232
  • [6] Radiocarbon-Based Assessment of Heterotrophic Soil Respiration in Two Mediterranean Forests
    Chiti, Tommaso
    Certini, Giacomo
    Forte, Claudia
    Papale, Dario
    Valentini, Riccardo
    ECOSYSTEMS, 2016, 19 (01) : 62 - 72
  • [7] Soil carbon cycling in a temperate forest: radiocarbon-based estimates of residence times, sequestration rates and partitioning of fluxes
    Gaudinski, JB
    Trumbore, SE
    Davidson, EA
    Zheng, SH
    BIOGEOCHEMISTRY, 2000, 51 (01) : 33 - 69
  • [8] Contrasting effects of nitrogen addition and soil warming on soil respiration in an old-growth subtropical forest
    Li, Debao
    Wu, Chuansheng
    Zhu, Biao
    Lu, Meng
    Wu, Jianping
    Thompson, Jill
    Bardgett, Richard D.
    ECOLOGICAL FRONTIERS, 2025, 45 (01): : 248 - 256
  • [9] Soil carbon cycling in a temperate forest: radiocarbon-based estimates of residence times, sequestration rates and partitioning of fluxes
    Julia B. Gaudinski
    Susan E. Trumbore
    Eric A. Davidson
    Shuhui Zheng
    Biogeochemistry, 2000, 51 : 33 - 69
  • [10] Vertical and temporal distribution of insolation in gaps in an old-growth coniferous forest
    Weiss, SB
    CANADIAN JOURNAL OF FOREST RESEARCH, 2000, 30 (12) : 1953 - 1964