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Titolo:
Epiphytic lichen abundance: Effects of stand age and composition in coastal British Columbia
Autore:
Price, K; Hochachka, G;
Indirizzi:
Long Beach Model Forest, Ucluelet, BC V0R 3A0, Canada Long Beach Model Forest Ucluelet BC Canada V0R 3A0 et, BC V0R 3A0, Canada
Titolo Testata:
ECOLOGICAL APPLICATIONS
fascicolo: 3, volume: 11, anno: 2001,
pagine: 904 - 913
SICI:
1051-0761(200106)11:3<904:ELAEOS>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATE RAIN-FOREST; WESTERN OREGON; OLD-GROWTH; MANAGED FORESTS; BOREAL FORESTS; CLEAR-CUT; LITTER; COMMUNITIES; BIOMASS; CANOPY;
Keywords:
British Columbia; coastal western hemlock; epiphytic lichen; forest age; forest management; lichen community composition; stand structure; Vancouver Island, Canada;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Price, K RR2,S23b C1, Burns Lake, BC V0J 1E0, Canada RR2,S23b C1 Burns Lake BC Canada V0J 1E0 ake, BC V0J 1E0, Canada
Citazione:
K. Price e G. Hochachka, "Epiphytic lichen abundance: Effects of stand age and composition in coastal British Columbia", ECOL APPL, 11(3), 2001, pp. 904-913

Abstract

Forest management, particularly in zones with infrequent disturbances, changes stand age and structure in ways that impact epiphytic lichen growth and establishment. This study investigates the effects of stand age and type on epiphytic Lichen abundance and composition (the relative percentages of alectorioid lichens and cyanolichens) in the Coastal Western Hemlock zone of western Vancouver Island, British Columbia, Canada. We sampled lichens from the litter layer in six young (< 70-yr-old), 18 mature (70-200 yr-old) and 40 old-growth (greater than or equal to 300-yr-old) stands of three species compositions (Picea sitchensis and Tsuga heterophylla, Thuja plicata and T. heterophylla, Abies amabilis and T. heterophylla) in four watersheds and in the coastal lowlands of Clayoquot and Barkley Sounds. We examined a subset of 32 stands paired for location and type to further examine the effects of stand age. The paucity of mature stands severely constrained study design. Epiphytic lichen abundance and the percentage of alectorioid lichensincreased with stand age, at least up to 120 yr, although not all trends reached statistical significance. Abundance and composition also varied withstand type and location. Relatively high-elevation (> 400 m) mature and old-growth T. heterophylla/A, amabilis forests had a high abundance of lichendominated by cyanolichens; low-elevation forests (< 200 m) had a high abundance dominated by alectorioids; mid-elevation forests (300-400 m) had lesslichen. Mature stands were either very small or were initiated by natural disturbances, and most contained structural remnants. Because 70-120 yr-oldstands with structural remnants had less lichen than paired old-growth stands, we concluded that structural retention, while important, may be insufficient to conserve epiphytic lichens in parts of the Coastal Western Hemlock zone.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 09:00:25