Productivity, Respiration, and Light-Response Parameters of World Grassland and Agroecosystems Derived From Flux-Tower Measurements. Gilmanov, T., G., Aires, L., Barcza, Z., Baron, V., S., Belelli, L., Beringer, J., Billesbach, D., Bonal, D., Bradford, J., Ceschia, E., Cook, D., Corradi, C., Frank, A., Gianelle, D., Gimeno, C., Gruenwald, T., Guo, H., Hanan, N., Haszpra, L., Heilman, J., Jacobs, A., Jones, M., B., Johnson, D., A., Kiely, G., Li, S., Magliulo, V., Moors, E., J., Nagy, Z., Nasyrov, M., Owensby, C., Pinter, K., Pio, C., Reichstein, M., Sanz, M., J., Scott, R., Soussana, J., F., Stoy, P., C., Svejcar, T., Tuba, Z., & Zhou, G. 2010.
doi  abstract   bibtex   
Grasslands and agroecosystems occupy one-third of the terrestrial area, but their contribution to the global carbon cycle remains uncertain. We used a set of 316 site-years of CO 2 exchange measurements to quantify gross primary productivity, respiration, and light-response parameters of grasslands, shrublands/savanna, wetlands, and cropland ecosystems worldwide. We analyzed data from 72 global flux-tower sites partitioned into gross photosynthesis and ecosystem respiration with the use of the light-response method (Gilmanov, T. G., D. A. Johnson, and N. Z. Saliendra. 2003. Growing season CO 2 fluxes in a sagebrush-steppe ecosystem in Idaho: Bowen ratio/energy balance measurements and modeling. Basic and Applied Ecology 4:167-183) from the RANGEFLUX and WORLDGRASSAGRIFLUX data sets supplemented by 46 sites from the FLUXNET La Thuile data set partitioned with the use of the temperature-response method (Reichstein, M., E. Falge, D. Baldocchi, D. Papale, R. Valentini, M. Aubinet, P. Berbigier, C. Bernhofer, N. Buchmann, M. Falk, T. Gilmanov, A. Granier, T. Grüwald, K. Havráková, D. Janous, A. Knohl, T. Laurela, A. Lohila, D. Loustau, G. Matteucci, T. Meyers, F. Miglietta, J. M. Ourcival, D. Perrin, J. Pumpanen, S. Rambal, E. Rotenberg, M. Sanz, J. Tenhunen, G. Seufert, F. Vaccari, T. Vesala, and D. Yakir. 2005. On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm. Global Change Biology 11:1424-1439). Maximum values of the quantum yield (α=75 mmol·mol -1), photosynthetic capacity (A max=3.4 mg CO 2·m -2·s -1), gross photosynthesis (P g,max=116 g CO 2·m -2·d -1), and ecological light-use efficiency (ε ecol=59 mmol·mol -1) of managed grasslands and high-production croplands exceeded those of most forest ecosystems, indicating the potential of nonforest ecosystems for uptake of atmospheric CO 2. Maximum values of gross primary production (8600 g CO 2·m -2·yr -1), total ecosystem respiration (7900 g CO 2·m -2· -1), and net CO 2 exchange (2400 g CO 2· -2· -1) were observed for intensively managed grasslands and high-yield crops, and are comparable to or higher than those for forest ecosystems, excluding some tropical forests. On average, 80% of the nonforest sites were apparent sinks for atmospheric CO 2, with mean net uptake of 700 g CO 2·m -2·yr -1 for intensive grasslands and 933 g CO 2· -2· -1 for croplands. However, part of these apparent sinks is accumulated in crops and forage, which are carbon pools that are harvested, transported, and decomposed off site. Therefore, although agricultural fields may be predominantly sinks for atmospheric CO 2, this does not imply that they are necessarily increasing their carbon stock. © 2010 Society for Range Management.
@misc{
 title = {Productivity, Respiration, and Light-Response Parameters of World Grassland and Agroecosystems Derived From Flux-Tower Measurements},
 type = {misc},
 year = {2010},
 source = {Rangeland Ecology & Management},
 pages = {16-39},
 volume = {63},
 issue = {1},
 id = {2de2b83a-2602-306d-aa61-9080f697a73a},
 created = {2015-05-29T13:13:19.000Z},
 file_attached = {false},
 profile_id = {5c1040db-25e3-36ea-a919-0994a44709e7},
 group_id = {c4af41cc-7e3c-3fd3-9982-bdb923596eee},
 last_modified = {2019-04-26T14:59:01.123Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Gilmanov2010},
 private_publication = {false},
 abstract = {Grasslands and agroecosystems occupy one-third of the terrestrial area, but their contribution to the global carbon cycle remains uncertain. We used a set of 316 site-years of CO 2 exchange measurements to quantify gross primary productivity, respiration, and light-response parameters of grasslands, shrublands/savanna, wetlands, and cropland ecosystems worldwide. We analyzed data from 72 global flux-tower sites partitioned into gross photosynthesis and ecosystem respiration with the use of the light-response method (Gilmanov, T. G., D. A. Johnson, and N. Z. Saliendra. 2003. Growing season CO 2 fluxes in a sagebrush-steppe ecosystem in Idaho: Bowen ratio/energy balance measurements and modeling. Basic and Applied Ecology 4:167-183) from the RANGEFLUX and WORLDGRASSAGRIFLUX data sets supplemented by 46 sites from the FLUXNET La Thuile data set partitioned with the use of the temperature-response method (Reichstein, M., E. Falge, D. Baldocchi, D. Papale, R. Valentini, M. Aubinet, P. Berbigier, C. Bernhofer, N. Buchmann, M. Falk, T. Gilmanov, A. Granier, T. Grüwald, K. Havráková, D. Janous, A. Knohl, T. Laurela, A. Lohila, D. Loustau, G. Matteucci, T. Meyers, F. Miglietta, J. M. Ourcival, D. Perrin, J. Pumpanen, S. Rambal, E. Rotenberg, M. Sanz, J. Tenhunen, G. Seufert, F. Vaccari, T. Vesala, and D. Yakir. 2005. On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm. Global Change Biology 11:1424-1439). Maximum values of the quantum yield (α=75 mmol·mol -1), photosynthetic capacity (A max=3.4 mg CO 2·m -2·s -1), gross photosynthesis (P g,max=116 g CO 2·m -2·d -1), and ecological light-use efficiency (ε ecol=59 mmol·mol -1) of managed grasslands and high-production croplands exceeded those of most forest ecosystems, indicating the potential of nonforest ecosystems for uptake of atmospheric CO 2. Maximum values of gross primary production (8600 g CO 2·m -2·yr -1), total ecosystem respiration (7900 g CO 2·m -2· -1), and net CO 2 exchange (2400 g CO 2· -2· -1) were observed for intensively managed grasslands and high-yield crops, and are comparable to or higher than those for forest ecosystems, excluding some tropical forests. On average, 80% of the nonforest sites were apparent sinks for atmospheric CO 2, with mean net uptake of 700 g CO 2·m -2·yr -1 for intensive grasslands and 933 g CO 2· -2· -1 for croplands. However, part of these apparent sinks is accumulated in crops and forage, which are carbon pools that are harvested, transported, and decomposed off site. Therefore, although agricultural fields may be predominantly sinks for atmospheric CO 2, this does not imply that they are necessarily increasing their carbon stock. © 2010 Society for Range Management.},
 bibtype = {misc},
 author = {Gilmanov, Tagir G. and Aires, L. and Barcza, Z. and Baron, V. S. and Belelli, L. and Beringer, J. and Billesbach, D. and Bonal, Damien and Bradford, J. and Ceschia, Eric and Cook, D. and Corradi, C. and Frank, A. and Gianelle, D. and Gimeno, C. and Gruenwald, T. and Guo, Haiqiang and Hanan, N. and Haszpra, L. and Heilman, J. and Jacobs, A. and Jones, M. B. and Johnson, D. A. and Kiely, G. and Li, Shenggong and Magliulo, V. and Moors, Eddy J. and Nagy, Z. and Nasyrov, M. and Owensby, C. and Pinter, K. and Pio, C. and Reichstein, M. and Sanz, M. J. and Scott, R. and Soussana, J. F. and Stoy, P. C. and Svejcar, T. and Tuba, Z. and Zhou, Guangsheng},
 doi = {10.2111/REM-D-09-00072.1},
 keywords = {FR_GUY}
}

Downloads: 0