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Fires, drought, extinction and regeneration / Jeff Duckett in Field Bryology, n°129 (Année 2023)

Public [article]  inField Bryology > n°129 (Année 2023) . - pp. 14-34 Titre : Fires, drought, extinction and regeneration Type de document : texte imprimé Auteurs : Jeff Duckett, Auteur ; Jill Kowal, Auteur ; Liz Andrew, Auteur ; Silvia Pressel, Auteur Année de publication : 2023 Article en page(s) : pp. 14-34 Langues : Anglais (eng) Catégories : [ZG] Royaume-Uni [Thèmes] Bryophytes Mots-clés : succession végétale  post-incendie Résumé : "Following a major fire on 30 May 2020 at Thursley Common National Nature Reserve (NNR), we documented in detail, for the first time for any post-fire succession, the early months of bryophyte recolonisation (Pressel et al.,2021). Funaria hygrometrica and Campylopus pyriformiswere the first new arrivals (mid-July, 56 days), from spores and caducous leaves or tubers respectively, with both taxa producing abundant protonemal gemmae initially. By mid-December (202 days) C. pyriformis had formed extensive vegetative colonies, while Funaria had numerous sporophytes of different ages. Ceratodon purpureus, from spores and abundant protonemal gemmae initially, Polytrichum juniperinum and P. formosum from rhizomes, and Marchantiapolymorpha subsp. ruderalis from spores, did not appear until early September (104 days). By mid-December (202 days) Ceratodon had young spear stage sporophytes, the Polytrichum species remained vegetative, while Marchantia was highly gemmiferous with young carpocephala.The present account advances the initial observations with two further years of post-fire bryophyte recolonisation data (December 2020 until December 2022). Here we also compare Thursley NNR and Chobham Common, the site of another major lowland heathland wildfire which occurred in late August 2020. Chobham Common is 35 km north of Thursley and has comparable weather." (source : auteurs) Type de publication : périodique Référence biblio : Duckett J., Kowal J., Andrew L., Pressel S., 2023 - Fires, drought, extinction and regeneration. Field Bryology, 129 : 14-34. ID PMB : 71397 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71397 [article]

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A tale of two fires : heathland bryophyte successions at Thursley Common / Silvia Pressel in Field Bryology, n°125 (Année 2021)  

Public [article]  inField Bryology > n°125 (Année 2021) . - pp. 34-49 Titre : A tale of two fires : heathland bryophyte successions at Thursley Common Type de document : texte imprimé Auteurs : Silvia Pressel, Auteur ; Jill Kowal, Auteur ; Jeff Duckett, Auteur Année de publication : 2021 Article en page(s) : pp. 34-49 Langues : Anglais (eng) Catégories : [ZG] Royaume-Uni [habitats/milieux] 3 - Landes, fruticées et prairies [Thèmes] Bryophytes Mots-clés : succession végétale  post-incendie Résumé : "Thursley Common National Nature Reserve in Surrey, south-east England, suffered devastating fires covering 228 hectares on 13 July 2006 and 150 hectares on30 May 2020 which burnt roughly 68% and 45% of the heathland respectively. When searching the literature for our article on bryophyte recolonisation of heathland on Thursley Common two years after the major fire in 2006 (Duckett et al., 2008) we made a surprising discovery. Apart from general statements about the rise and fall of classic post-fire taxa like Funaria hygrometrica (Southorn, 1976, 1977), dating back to 1925 for Surrey heathlands (Benson & Blackwell, 1926),and Marchantia polymorpha(Duckett & Pressel, 2009), and a listing of Ceratodon purpureus, Leptobryum pyriforme, Pohlia nutans and Polytrichum juniperinum as other post-fire specialists on British heathlands (Coppins & Shimwell, 1971; Southorn, 1976; Hobbs & Gimingham, 1987; Burch, 2009) and Canadian boreal mixed forest (Bradbury, 2006), plus data by Clement & Touffet (1990) showing that fires lead to monogeneric dominance of Polytrichum species, we were unable to trace a single publication chronicling the long-term sequence of the successional changes or even a full listing of the taxa involved several years after a fire. Almost equally remarkable was the lack of detailed accounts of the reproductive cycles of a range of common heathland mosses, apart from Polytrichales (Longton & Schuster, 1983), and how these might be disrupted by fires. Further lacunae are temporal accounts of bryophyte successions immediately following fires leading to communities dominated by Funaria, Marchantia, Ceratodon and Polytrichum juniperinum,apart from a single study in Tasmania (Duncan & Dalton, 1982). This paper attempts to fill in these gaps." (source : auteurs) Type de publication : périodique Référence biblio : Pressel S., Kowal J., Duckett J., 2021 - A tale of two fires : heathland bryophyte successions at Thursley Common. Field Bryology, 125 : 34-49. ID PMB : 71398 En ligne : https://britishbryologicalsociety.org.uk/wp-content/uploads/2021/06/FB125-Thursl [...] Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71398 [article]

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