Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
HERBIVORE EFFECTS ON PLANT-SPECIES DENSITY AT VARYING PRODUCTIVITY LEVELS
Autore:
GOUGH L; GRACE JB;
Indirizzi:
MARINE BIOL LAB,CTR ECOSYST WOODS HOLE MA 02543 LOUISIANA STATE UNIV,DEPT PLANT BIOL BATON ROUGE LA 70803 US GEOL SURVEY,NATL WETLANDS RES CTR LAFAYETTE LA 70506
Titolo Testata:
Ecology
fascicolo: 5, volume: 79, anno: 1998,
pagine: 1586 - 1594
SICI:
0012-9658(1998)79:5<1586:HEOPDA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMMUNITY STRUCTURE; INSECT HERBIVORY; COMPETITION; DIVERSITY; DISTURBANCE; FIELD; MARSH; FERTILIZATION; BIOMASS; VEGETATION;
Keywords:
BIOMASS; COASTAL MARSH; DIVERSITY; FERTILIZATION; HERBIVORY; NUTRIA; NUTRIENTS; PRODUCTIVITY; SAGITTARIA LANCIFOLIA; SCIRPUS AMERICANUS; SPARTINA PATENS; SPECIES DENSITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
61
Recensione:
Indirizzi per estratti:
Citazione:
L. Gough e J.B. Grace, "HERBIVORE EFFECTS ON PLANT-SPECIES DENSITY AT VARYING PRODUCTIVITY LEVELS", Ecology, 79(5), 1998, pp. 1586-1594

Abstract

Artificially increasing primary productivity decreases plant species richness in many habitats; herbivory may affect this outcome, but it has rarely been directly addressed in fertilization studies. This experiment was conducted in two Louisiana coastal marshes to examine the effects of nutrient enrichment and sediment addition on herbaceous plantcommunities with and without vertebrate herbivory. After three growing seasons, fertilization increased community biomass in all plots, butdecreased species density (the number of species per unit area) only in plots protected from herbivory. Herbivory alone did not alter species density at either site. At the brackish marsh, herbivory caused a shift in dominance in the fertilized plots from a species that is considered the competitive dominant, but is selectively eaten, to another less palatable species. At the fresh marsh, increased dead biomass in the absence of herbivory and in the fertilized plots probably contributed to the decrease in species density, perhaps by limiting germinationof annuals. Our results support those of other fertilization studies in which plant species density decreases with increased biomass, but only in those plots protected from herbivory.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/08/20 alle ore 08:09:29