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Titolo:
The response of Puccinellia maritima to burial: A key to understanding itsrole in salt-marsh dynamics?
Autore:
Langlois, E; Bonis, A; Bouzille, JB;
Indirizzi:
Univ Rennes 1, CNRS, UMR EcoBio 6553, F-35042 Rennes, France Univ Rennes 1 Rennes France F-35042 EcoBio 6553, F-35042 Rennes, France
Titolo Testata:
JOURNAL OF VEGETATION SCIENCE
fascicolo: 2, volume: 12, anno: 2001,
pagine: 289 - 297
SICI:
1100-9233(200104)12:2<289:TROPMT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
SAND; PHOTOSYNTHESIS; VEGETATION; AMMOPHILA; FLUXES; PLANTS; GROWTH;
Keywords:
accretion; biomass; erosion; growth rate; low marsh; pioneer zone; sedimentation rate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Bonis, A Univ Rennes 1, CNRS, UMR EcoBio 6553, Campus Beaulieu, F-35042 Rennes, France Univ Rennes 1 Campus Beaulieu Rennes France F-35042 nnes, France
Citazione:
E. Langlois et al., "The response of Puccinellia maritima to burial: A key to understanding itsrole in salt-marsh dynamics?", J VEG SCI, 12(2), 2001, pp. 289-297

Abstract

The plant and sediment dynamics in salt marshes are strongly interrelated,but few data are available to document their interaction. Puccinellia maritima is a perennial grass that occurs widely in salt marshes and this studyexamines its role in the stabilization or trapping of sediment in the pioneer zone and its response to burial, a characteristic phenomenon in accreting salt marshes. Puccinellia not only appears to limit erosion but also to significantly enhance accretion. The functional role of this species is largely dependent on the local disturbance regime. The response of Puccinelliato burial was studied in a series of burial treatments. Growth performanceof Puccinellia was stimulated by burial of 4 mm sediment and reduced by burial of 8 mm/month. Burial under 12 mm of sediment led to high mortality ofup to 97 %. Response was determined by the instantaneous thickness of sediment rather than by the total quantity. Morphological response to burial consisted mainly of stem elongation. Plants collected from accretion zones inthe field also produced tillers with adventitious roots at successive soillayers. The range of burial tolerances found for Puccinellia fits well with its occurrence in locations with up to 8 mm sediment accretion per tidal cycle, a common situation in the salt marsh studied.

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Documento generato il 09/07/20 alle ore 19:36:37