Primary productivity of natural grass ecosystems of the tropics: A reappraisal

S. P. Long, E. Garcia Moya, S. K. Imbamba, A. Kamnalrut, M. T.F. Piedade, J. M.O. Scurlock, Y. K. Shen, D. O. Hall

Research output: Contribution to journalArticle

Abstract

Studies of net primary production in four contrasting tropical grasslands show that when full account is taken of losses of plant organs above- and below-ground these ecosystems are far more productive than earlier suggested. Previous values have mainly been provided by the International Biological Programme (IBP), where estimates of production were based on a change in vegetation mass alone and would not necessarily have taken full account of organ losses and turnover. Calculation at three of our sites based on estblished methodology using changes in plant mass alone (i.e. that used by the International Biological Programme, IBP) proved to be serious underestimates of when acount was taken of losses simultaneously with measurement of change in plant mass. Accounting for the turnover of material at these three sites resulted in productivities up to five times higher than were obtained using the standard IBP procedure. An emergent C4 grass stand at a fourth site in the Amazon achieved a productivity which approached the maximum recorded for agricultural crops. In this case, productivity values, when organ losses were taken into account, only slightly exceeded that obtained with IBP methods. The findings reported here have wider implications, in prediction of global carbon cycling, remote sensing of plant productivity and impact assessment of conversion to arable cropping systems.

Original languageEnglish (US)
Pages (from-to)155-166
Number of pages12
JournalPlant and Soil
Volume115
Issue number2
DOIs
StatePublished - Apr 1 1989
Externally publishedYes

Fingerprint

primary productivity
tropics
grass
grasses
productivity
ecosystems
ecosystem
tropical grasslands
turnover
plant organs
sward
remote sensing
cropping systems
net primary production
cropping practice
vegetation
prediction
carbon
grassland
crops

Keywords

  • Distichlis spicata
  • Echinochloa polystachya
  • Eulalia trispicata
  • Lophopogon intermedius
  • Pennisetum mezianum
  • Themeda triandra
  • biomass
  • decomposition
  • primary production
  • primary productivity

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

Cite this

Long, S. P., Garcia Moya, E., Imbamba, S. K., Kamnalrut, A., Piedade, M. T. F., Scurlock, J. M. O., ... Hall, D. O. (1989). Primary productivity of natural grass ecosystems of the tropics: A reappraisal. Plant and Soil, 115(2), 155-166. https://doi.org/10.1007/BF02202584

Primary productivity of natural grass ecosystems of the tropics : A reappraisal. / Long, S. P.; Garcia Moya, E.; Imbamba, S. K.; Kamnalrut, A.; Piedade, M. T.F.; Scurlock, J. M.O.; Shen, Y. K.; Hall, D. O.

In: Plant and Soil, Vol. 115, No. 2, 01.04.1989, p. 155-166.

Research output: Contribution to journalArticle

Long, SP, Garcia Moya, E, Imbamba, SK, Kamnalrut, A, Piedade, MTF, Scurlock, JMO, Shen, YK & Hall, DO 1989, 'Primary productivity of natural grass ecosystems of the tropics: A reappraisal', Plant and Soil, vol. 115, no. 2, pp. 155-166. https://doi.org/10.1007/BF02202584
Long SP, Garcia Moya E, Imbamba SK, Kamnalrut A, Piedade MTF, Scurlock JMO et al. Primary productivity of natural grass ecosystems of the tropics: A reappraisal. Plant and Soil. 1989 Apr 1;115(2):155-166. https://doi.org/10.1007/BF02202584
Long, S. P. ; Garcia Moya, E. ; Imbamba, S. K. ; Kamnalrut, A. ; Piedade, M. T.F. ; Scurlock, J. M.O. ; Shen, Y. K. ; Hall, D. O. / Primary productivity of natural grass ecosystems of the tropics : A reappraisal. In: Plant and Soil. 1989 ; Vol. 115, No. 2. pp. 155-166.
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