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Auteur Daniel Lucius Kelly |
Documents disponibles écrits par cet auteur (4)
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Long-term deer exclusion in yew-wood and oakwood habitats in southwest Ireland : Changes in ground flora and species diversity / Philip Perrin in Forest Ecology and Management, vol. 262, n°12 (Année 2011)
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Titre : Long-term deer exclusion in yew-wood and oakwood habitats in southwest Ireland : Changes in ground flora and species diversity Auteurs : Philip Perrin, Auteur ; Fraser J.G. Mitchell, Auteur ; Daniel Lucius Kelly, Auteur Année de publication : 2011 Article en page(s) : pp. 2328-37 Langues : Anglais (eng) Catégories : [ZG] Irlande
[habitats/milieux] 4 - ForêtsMots-clés : suivi à long terme broutage Résumé : "Changes in ground flora were monitored over a 32-year period in deer exclosures in a yew-wood and a neighbouring oakwood in Killarney National Park, southwest Ireland; both woods are Annex I habitats under the European Habitats Directive. Comparison was made with unfenced plots adjacent to each of the exclosures. During the period of the study, both woods were heavily grazed by introduced sika deer (Cervus nippon). In the yew-wood exclosures, total ground flora cover increased markedly during the period of deer exclusion, the main species to increase in abundance being Rubus fruticosus agg. and Hedera helix. Herbaceous species increased initially in frequency but subsequently declined; herbaceous species had higher total cover in unfenced plots than in fenced plots at the end of the study. In the oakwood, Luzula sylvatica and Vaccinium myrtillus expanded their cover in one exclosure with cover in ferns declining, but in other exclosures where dense holly thickets developed, it was instead R. fruticosus and H. helix that became more abundant within the fences than outside. Overall, long-term fencing has caused a shift from vegetation characterised by woodland specialist to woodland generalist species and there are indications of a long-term decline in diversity. We conclude that chronic heavy grazing in these woodlands has strongly influenced the overall abundance and composition of the ground flora, but that complete exclusion of grazing is also undesirable due to potential declines in diversity of woodland specialists." (source : auteurs) Note de contenu : L'article traite des changements dans la flore du sous-bois observés sur une période de 32 ans dans des enclos à cerfs dans une forêt de ifs et une forêt voisine de chênes situées dans le parc national de Killarney, au sud-ouest de l'Irlande. la clôture à long terme a entraîné un passage de la végétation caractérisée par des espèces spécialistes des bois à des espèces généralistes des bois, avec des indications d'un déclin à long terme de la diversité. Les chercheurs concluent que le broutement chronique et intensif dans ces forêts a fortement influencé l'abondance et la composition globale de la flore du sous-bois, mais que l'exclusion complète du broutement n'est pas non plus souhaitable en raison des déclins potentiels de la diversité des spécialistes des bois. Type de publication : périodique Référence biblio : Perrin P., Mitchell F.-G., Kelly D., 2011 - Long-term deer exclusion in yew-wood and oakwood habitats in southwest Ireland : Changes in ground flora and species diversity. Forest Ecology and Management, 262 (12) : 2328-37. ID PMB : 72282 DOI : 10.1016/j.foreco.2011.08.028 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72282
in Forest Ecology and Management > vol. 262, n°12 (Année 2011) . - pp. 2328-37[article]Exemplaires(0)
Disponibilité aucun exemplaire Plant community ecology of petrifying springs (Cratoneurion) – a priority habitat / Melinda D. Lyons in Phytocoenologia, vol. 47, n°1 (Année 2017)
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Titre : Plant community ecology of petrifying springs (Cratoneurion) – a priority habitat Type de document : texte imprimé Auteurs : Melinda D. Lyons, Auteur ; Daniel Lucius Kelly, Auteur Année de publication : 2017 Article en page(s) : pp. 13-32 Langues : Anglais (eng) Catégories : [ZG] Europe occidentale
[ZG] Irlande
[Thèmes] Bryophytes
[Thèmes] Ecologie
[Thèmes] Habitat d'intérêt communautaire
[Thèmes] Habitat naturel et semi-naturelMots-clés : Cratoneurion espèce végétale indicatrice groupement végétal Résumé : "Aims: To investigate the floristic and abiotic characteristics of the Habitats Directive priority habitat 'Petrifying springs with tufa formation (Cratoneurion)'. Location: The island of Ireland, north-western Europe. Methods: Vascular plants, bryophytes and abiotic variables were recorded in a field survey of 186 relevés (4 m²). Relevés were assigned to groups based on species composition, using fuzzy clustering and Indicator Species Analysis. Eight plant communities were described. Results: Group 1 Eucladium verticillatum-Pellia endiviifolia Tufa Cascades, of steep slopes, are related to Continental Eucladietum verticillati and Adiantion communities. Group 2 Palustriella commutata-Geranium robertianum Springheads and Group 3 Brachythecium rivulare- Platyhypnidium riparioides Tufaceous Streams and Flushes are woodland communities related to the Equiseto telmatejae-Fraxinetum and the Pellio endiviifoliae-Cratoneuretum commutati. Groups 1 to 3 fall broadly within the Brachythecio rivularis-Cratoneuretum forest spring vegetation type. Group 4 Palustriella commutata- Agrostis stolonifera Springheads are intermediate between Groups 1 to 3 and Groups 5 to 8. Group 5 Schoenus nigricans Springs, Group 6 Carex lepidocarpa Small Sedge Springs and Group 7 Palustriella falcata-Carex panicea Springs are transitional to Caricion davallianae small-sedge fen communities. Group 8 Saxifraga aizoides- Seligeria oelandica Springs are ecologically distinctive, species-rich assemblages confined to montane cliffs, with a restricted distribution in upland limestone regions, containing a number of nationally and internationally rare taxa. Of our eight groups, Groups 7 and 8 have the closest affinities with Cratoneuretum falcati spring communities. Abiotic variables differ significantly among the eight groups. Slope, macronutrient levels and shading by tree canopies are highly significantly related to the main axes of variation in the floristic data. Species diversity is inversely related to phosphate levels. Group 8 communities are irrigated by water of the highest pH and lowest solute concentrations. Conclusions: Our eight groups characterise variation within the habitat, elucidate ecological gradients with related habitats and facilitate conservation of this ecologically distinctive habitat." (source : auteur) Type de publication : périodique Référence biblio : Lyons M., Kelly D., 2017 - Plant community ecology of petrifying springs (Cratoneurion) – a priority habitat. Phytocoenologia, 47 (1) : 13-32. ID PMB : 71093 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71093
in Phytocoenologia > vol. 47, n°1 (Année 2017) . - pp. 13-32[article]Exemplaires(0)
Disponibilité aucun exemplaire A preliminary sketch of the Irish acidophilous oakwoods / Daniel Lucius Kelly in Colloques phytosociologiques, vol. 3 (1974)
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Titre : A preliminary sketch of the Irish acidophilous oakwoods Type de document : texte imprimé Auteurs : Daniel Lucius Kelly, Auteur ; John J. Moore, Auteur Année de publication : 1975 Article en page(s) : pp. 375-387 Langues : Anglais (eng) Catégories : [ZG] Irlande
[Espèces (in biblio)] QuercusMots-clés : massif du Wicklow phytosociolgie position édaphique relevé phytosociologique association végétale Résumé : "Nous présentons un tableau synthétique de 186 relevés (publiés et non) provenant du Blechno-Quercetum petraeae irlandais. La plupart des relevés se situent à Killarney, au sud-ouest, et dans les vallées du massif de Wicklov, à l'est du pays ; les autres se situent dans d'autres forêts de la moitié occidentale.
Nous constatons que les trois sous-associations de BRAUN-BLANQUET et TÜXEN (1952) sont évidentes. Il faut changer le nom de la sous-association à climat perhumide en « scapanietosum », puisque Isothecium myosuroides, l’espèce choisie par BRAUN-BLANQUET et TÜXEN, se montre constante dans toutes les chênaies irlandaises.
Nous discutons la position phytosociologique et édaphique des deux espèces de Chêne en Irlande ; Q. robur est absent ou extrêmement rare dans les bois des Quercetea robori-petraeae." (source : auteurs)Type de publication : périodique Référence biblio : Kelly D., Moore J., 1975 - A preliminary sketch of the Irish acidophilous oakwoods. Colloques phytosociologiques, 3 : 375-387. ID PMB : 22004 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=22004
in Colloques phytosociologiques > vol. 3 (1974) . - pp. 375-387[article]Exemplaires(3)
Cote Localisation Disponibilité VH0 2 CP3 Brest Exclu du prêt VH0 2 CP3 Caen Exclu du prêt VH0 2 CP3 Nantes Exclu du prêt The regeneration of Quercus petraea (sessile oak) in southwest Ireland : a 25-year experimental study / Daniel Lucius Kelly in Forest Ecology and Management, vol. 166, n°1-3 (Année 2002)
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Titre : The regeneration of Quercus petraea (sessile oak) in southwest Ireland : a 25-year experimental study Auteurs : Daniel Lucius Kelly, Auteur Année de publication : 2002 Article en page(s) : pp. 207-226 Langues : Anglais (eng) Catégories : [ZG] Irlande
[habitats/milieux] 4 - Forêts
[Espèces (in biblio)] Quercus petraeaMots-clés : suivi à long terme gestion forestière Résumé : "The growth and survival of Quercus petraea saplings were monitored over a 25-year period, in an exclosure in a heavily-grazed oakwood on podzol soil in Killarney National Park. Seedlings were subjected to combinations of two levels of shading (under canopy and in an artificial clearing), two levels of competition (weeded and unweeded) and five fertiliser treatments (N, P, NP, Ca and control).
Damage by Apodemus sylvaticus (long-tailed fieldmice) was confined to acorns and first-year seedlings, and was not a limiting factor. Invertebrate damage was unimportant. Seedling survival was greatly enhanced within the ungrazed exclosure, even under canopy. In the clearing, following a short-term breach of the fence in the second winter, Cervus nippon (sika deer) browsed 49% of oak seedlings in weeded plots but only 11% in unweeded plots, confirming that surrounding vegetation cover may exercise a protective effect. In later years, seedling survival was significantly higher in the weeded plots, presumably owing to reduced competition. Seedlings under canopy showed no significant response to fertilisation or weeding; the median proportion surviving per plot was zero within 8 years and all had died within 20 years. In the clearing, the median proportion surviving per plot was 0.33 after 8 years and 0.2 after 25 years. In a portion of the clearing with peaty soil and impeded drainage, seedlings showed reduced performance and significantly increased mortality. Microsphaera alphitoides (oak mildew) attacked seedlings mainly in the clearing; its impact appeared negligible. Fertilisation with P significantly enhanced performance in the clearing. No fertiliser treatment enhanced survival. Fertilisation with N alone led to sharply increased mortality in the clearing.
I conclude that, in woodlands in western Ireland, successful oak regeneration is to be expected only in unshaded or lightly-shaded sites where grazing levels are low." (source : auteur)Note de contenu : Cette article traite de la croissance et de la survie des jeunes plants de chêne sessile (Quercus petraea) sur une période de 25 ans dans une forêt de chênes lourdement broutée dans le parc national de Killarney. La régénération réussie des chênes sessiles est à attendre uniquement dans des sites non ombragés ou légèrement ombragés où le broutage est faible. Type de publication : périodique Référence biblio : Kelly D., 2002 - The regeneration of Quercus petraea (sessile oak) in southwest Ireland : a 25-year experimental study. Forest Ecology and Management, 166 : 207-226. ID PMB : 72284 DOI : 10.1016/S0378-1127(01)00670-3 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72284
in Forest Ecology and Management > vol. 166, n°1-3 (Année 2002) . - pp. 207-226[article]Exemplaires(0)
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