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Titolo:
THE RELATIONSHIP BETWEEN THE SOIL SEED BANK AND ABOVEGROUND VEGETATION OF A COASTAL BARRIER-ISLAND
Autore:
LOONEY PB; GIBSON DJ;
Indirizzi:
SO ILLINOIS UNIV,DEPT PLANT BIOL CARBONDALE IL 62901 UNIV W FLORIDA,INST COASTAL & ESTUARINE RES PENSACOLA FL 32514
Titolo Testata:
Journal of vegetation science
fascicolo: 6, volume: 6, anno: 1995,
pagine: 825 - 836
SICI:
1100-9233(1995)6:6<825:TRBTSS>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
BURIED VIABLE SEEDS; SEASONAL-VARIATION; DUNE SLACK; DECIDUOUS FOREST; PERDIDO KEY; NEW-ZEALAND; DYNAMICS; SUCCESSION; DISTURBANCE; GERMINATION;
Keywords:
DCA; DISTURBANCE; DUNE; FLORIDA; SUCCESSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
64
Recensione:
Indirizzi per estratti:
Citazione:
P.B. Looney e D.J. Gibson, "THE RELATIONSHIP BETWEEN THE SOIL SEED BANK AND ABOVEGROUND VEGETATION OF A COASTAL BARRIER-ISLAND", Journal of vegetation science, 6(6), 1995, pp. 825-836

Abstract

The germinable soil seed bank is described from a coastal barrier island off the northwest coast of Florida, USA. Soil samples collected from seven vegetation types, recently deposited dredge spoil and unvegetated areas in autumn 1990 and spring 1991 were placed out in greenhouse trays. 110 taxa germinated from the samples with the largest number (41) being C-3 perennial dicots. The largest number of taxa germinatedfrom dry (57) and wet (54) swales, the fewest (one species: Heterotheca subaxillaris) from strand. Similarity of seed bank densities to above-ground species cover was low (Jaccard's Index = 0.36), not different between vegetation types, but higher in the autumn than in the following spring. Compositional gradients in the seed bank and above-groundvegetation determined using DCA ordination were highly correlated andrelated to distance from mean high water, and plot elevation. At the landscape scale, the seed bank provided an equally clear delineation of vegetation types to that based upon the above-ground vegetation. Theseed bank of low disturbance, late-succession vegetation types (wooded dunes, swales, marshes) was well developed (high species richness, emergent density, and percentage annual species) with the exception that the large-seeded woody species (i.e. Quercus spp.) were absent from the wooded dune seed bank. By contrast, a poorly developed and transient seed bank occurred in more frequently disturbed (extensive sand movement, salt spray), early successional dredge spoil, unvegetated areasand strand. These contrasts support a general pattern of increasing seed bank development and a persistent rather than transient seed bank with decreasing disturbance frequency, increasing time since disturbance and successional maturity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 19:44:36