Articles | Volume 2, issue 3
SOIL, 2, 403–419, 2016
SOIL, 2, 403–419, 2016

Original research article 12 Aug 2016

Original research article | 12 Aug 2016

Soil CO2 efflux in an old-growth southern conifer forest (Agathis australis) – magnitude, components and controls

Luitgard Schwendenmann and Cate Macinnis-Ng

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Cited articles

Adachi, M., Bekku, Y. S., Rashidah, W., Okuda, T., and Koizumi, H.: Differences in soil respiration between different tropical ecosystems, Appl. Soil Ecol., 34, 258–265, 2006.
Ammer, C. and Wagner, S.: Problems and options in modelling fine-root biomass of single mature Norway spruce trees at given points from stand data, Can. J. Forest Res., 32, 581–590, 2002.
Andrews, J. A., Harrison, K. G., Matamala, R., and Schlesinger, W. H.: Separation of root respiration using carbon-13 labeling during free-air carbon enrichment (FACE), Soil Sci. Soc. Am. J., 63, 1429–1435, 1999.
Bahn, M., Reichstein, M., Davidson, E. A., Grünzweig, J., Jung, M., Carbone, M. S., Epron, D., Misson, L., Nouvellon, Y., Roupsard, O., Savage, K., Trumbore, S. E., Gimeno, C., Curiel Yuste, J., Tang, J., Vargas, R., and Janssens, I. A.: Soil respiration at mean annual temperature predicts annual total across vegetation types and biomes, Biogeosciences, 7, 2147–2157,, 2010.
Bergin, D. and Steward, G.: Kauri: Establishment, growth and management, New Zealand Indigenous Tree Bulletin No. 2, New Zealand Forest Research Institute, Rotorua, 2004.
Short summary
This is the first study quantifying total soil CO2 efflux, heterotrophic and autotrophic respiration in an old-growth kauri forest. Root biomass explained a high proportion of the spatial variation suggesting that soil CO2 efflux in this forest is not only directly affected by the amount of autotrophic respiration but also by the supply of C through roots and mycorrhiza. Our findings also suggest that biotic factors such as tree structure should be investigated in soil carbon related studies.