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Authors Amiaud, B; Bonis, A; Bouzille, JB
Author Full Name Amiaud, B; Bonis, A; Bouzille, JB
Title Germination conditions and role of herbivores in the dispersion and recruitment of a clonal species: Juncus gerardi Lois.
Source CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
Language French
Document Type Article
Author Keywords germinative capacities; feces; clonal plant; grazers; endozoochory; pastures
Keywords Plus SALT-MARSH PLANTS; SEEDLING ESTABLISHMENT; GENOTYPIC DIVERSITY; SOUTHERN FRANCE; LIFE HISTORIES; GRASS SEEDS; CATTLE DUNG; GROWTH; SALINITY; PATTERNS
Abstract The finding of new individuals of a clonal plant, Juncus gerardi, raised the question of modalities for the colonization of new sites by this species. Indeed, the existence of seedlings has not been observed in the field, nor reported in the literature for European marshes. Among the parameters limiting recruitment, we examined the soil seed bank, which appeared extremely small. Many seeds could be found in bovine feces but few were found in equine feces. Futhermore, bovines are not only important for seed dispersion, but also for the improvement of the germinative capacities: the seed germination rate of Juncus gerardi was doubled after digestive transit. Germination testing showed that this species is largely tolerant to salinity (from 0 to 26,4 mS.cm(-1)). The germination rate was maximal with a thermoperiod of 10-20 degreesC but null for a 0-10 degreesC thermoperiod. Germination was improved by immersion and was light dependent. The critical phase for colonization success in new habitats could be primarily seedling survival. Recruitment success in Juncus gerardi seems to be a rare event, requiring the combination of favorable conditions related to climate and gap openings in swards.
Author Address Univ Rennes 1, Serv Ecol Vegetale, F-35042 Rennes, France
Reprint Address Amiaud, B (reprint author), Univ Rennes 1, Serv Ecol Vegetale, Campus Beaulieu, F-35042 Rennes, France.
Times Cited 8
Total Times Cited Count (WoS, BCI, and CSCD) 8
Publisher NATL RESEARCH COUNCIL CANADA
Publisher City OTTAWA
Publisher Address RESEARCH JOURNALS, MONTREAL RD, OTTAWA, ONTARIO K1A 0R6, CANADA
ISSN 0008-4026
29-Character Source Abbreviation CAN J BOT
ISO Source Abbreviation Can. J. Bot.-Rev. Can. Bot.
Publication Date NOV
Year Published 2000
Volume 78
Issue 11
Beginning Page 1430
Ending Page 1439
Digital Object Identifier (DOI) 10.1139/b00-117
Page Count 10
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 385KX
Unique Article Identifier WOS:000166004300006
Plants associated with this reference

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