[article]
| Titre : |
The effect of mortality on estimates of net above-ground production by Spartina alterniflora |
| Type de document : |
texte imprimé |
| Auteurs : |
R.A. Houghton, Auteur |
| Année de publication : |
1985 |
| Article en page(s) : |
pp. 121-132 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Espèces (in biblio)] Spartina alterniflora
|
| Résumé : |
"Monthly changes in the live and dead biomass of harvested Spartina alterniflora Lois. were compared with the growth and mortality of individual tillers on permanent plots to determine the extent to which estimates of net above-ground primary production (NAPP) based on harvest methods missed the turnover of plant tissues. Enumeration of live tillers in the harvested samples revealed a 60% reduction in the number of live tillers between May and September. This loss of live biomass never appeared as a positive change in dead biomass during the growing season. Measurements of individual tillers showed that dying tillers had less mass than surviving tillers, and hence that the turnover of tiller biomass was less than the turnover of tiller numbers (15% of NAPP as opposed to 60%). Estimates to the turnover of biomass as a result of leaf mortality were also obtained from measurements of individual tillers. The mortality of tillers and of leaves added about 20 and 12%, respectively, to NAPP calculated from the summation of positive changes in live biomass. Other commonly used estimates of NAPP based on harvest data were 12 to 27% lower than the more direct estimate provided here based on documented mortality." (source : auteur) |
| Type de publication : |
périodique |
| Référence biblio : |
Houghton R.-A., 1985 - The effect of mortality on estimates of net above-ground production by Spartina alterniflora. Aquatic Botany, 22 (2) : 121-132. |
| ID PMB : |
65696 |
| DOI : |
10.1016/0304-3770(85)90041-5 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=65696 |
in Aquatic Botany > vol. 22, n°2 (Année 1985) . - pp. 121-132
[article]
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trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheThe effect of mortality on estimates of net above-ground production by Spartina alterniflora in Aquatic Botany, vol. 22, n°2 (Année 1985)
