[article]
| Titre : |
Reproduction of Crassula helmsii by seed in western Europe |
| Type de document : |
texte imprimé |
| Auteurs : |
Bram D'hondt, Auteur ; Luc Denys, Auteur ; Wim Jambon, Auteur ; Roeland De Wilde, Auteur ; Tim Adriaens, Auteur ; Jo Packet, Auteur ; Johan van Valkenburg, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
pp. 125-130 |
| Langues : |
Anglais (eng) |
| Catégories : |
[habitats/milieux] 2 - Milieux aquatiques non marins
[Espèces (in biblio)] Crassula helmsii (Kirk) Cockayne
[Thèmes] Reproduction
|
| Mots-clés : |
plante invasive germination |
| Résumé : |
"The amphibious plant species Crassula helmsii is a widely established and still-spreading alien in various parts of Europe, where it is considered invasive as its dense swards stress the viability of local biota. The species was considered to exclusively reproduce through vegetative means, until ex situ germination was recorded from a single locality in Belgium. We assessed whether this seed viability holds on a wider scale, by testing 16 populations from The Netherlands, Belgium, northern France, eastern England and northern Germany in a greenhouse germination experiment. Seedlings were observed from all populations but two, and from each of the five countries. Although most fruits were lacking seeds and the inferred germination percentages were overall low, germinable seed numbers are considerable given the high density of flowering stems. An in situ test revealed seeds to make it through normal winter conditions without signs of physical damage and with retention of germinability. Our results suggest that reproduction by seed is a relatively cryptic but widespread phenomenon throughout western Europe. The persistency of seed banks requires further investigation. Nonetheless, these findings already challenge the efficacy of techniques currently applied in C. helmsii control." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
D'hondt B., Denys L., Jambon W., De Wilde R., Adriaens T., Packet J., van Valkenburg J., 2016 - Reproduction of Crassula helmsii by seed in western Europe. Aquatic Invasions, 11 (2) : 125-130. |
| ID PMB : |
64717 |
| En ligne : |
https://data.inbo.be/purews/files/11897469/AI_2016_Dhondt_etal.pdf |
| Format de la ressource électronique : |
document |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=64717 |
in Aquatic Invasions > vol. 11, n°2 (Année 2016) . - pp. 125-130
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