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Titolo:
THE INTERACTIVE EFFECTS OF FIRE AND HERBIVORY ON A COASTAL MARSH IN LOUISIANA
Autore:
FORD MA; GRACE JB;
Indirizzi:
US GEOL SURVEY,NATL WETLANDS RES CTR,700 CAJUNDOME BLVD LAFAYETTE LA 70506 LOUISIANA STATE UNIV,DEPT PLANT BIOL BATON ROUGE LA 70803
Titolo Testata:
Wetlands
fascicolo: 1, volume: 18, anno: 1998,
pagine: 1 - 8
SICI:
0277-5212(1998)18:1<1:TIEOFA>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT COMMUNITY STRUCTURE; COMPETITION; LAKE; USA;
Keywords:
FIRE; HERBIVORY; COASTAL MARSH; SPECIES DENSITY; PLANT COVER; PLANT BIOMASS; NUTRIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
M.A. Ford e J.B. Grace, "THE INTERACTIVE EFFECTS OF FIRE AND HERBIVORY ON A COASTAL MARSH IN LOUISIANA", Wetlands, 18(1), 1998, pp. 1-8

Abstract

Both vertebrate herbivores and fire have long been known to have dramatic and important effects on wetland vegetation. However, the interactive effects of burning and herbivory have received less attention. Inthis study, conducted in the coastal marshes of the Pearl River Basinin Louisiana, USA, both the effects of herbivory and fire as well as the interaction between these effects were examined in three marsh community types: Sagittaria lancifolia, Panicum virgatum, and Spartina patens. At five sites for each of the three community types, the effectsof burning and fencing to exclude herbivores were determined over twoyears. Results showed that total biomass was reduced by burning bur increased by fencing, with no interactive effects on total biomass. Species density (the number of species per unit area) was enhanced in plots that were both burned and fenced. Spartina patens was an important component in all three communities. Cover estimates indicated that S. patens responded to burning and fencing differently from the other dominant species. In the Panicum virgatum community, P. virgatum cover was enhanced by burning and fencing while S. patens cover was reduced. In the Sagittaria lancifolia community, S. lancifolia and Vigna luteolawere enhanced by burning and fencing while S. patens was reduced. In the S. patens community, Scirpus americanus was enhanced by fencing, but burning had no significant effect on cover of either dominant species. These and other data are generally consistent with the hypothesis that herbivory favors S. patens while burning favors other dominant species. Thus, the relative effects of fire and herbivory have an influence(along with other factors such as salinity) on the dominance of S. patens in coastal marshes.

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Documento generato il 05/07/20 alle ore 22:39:41