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Titolo:
Ecology of the pteridophytes on the southern slopes of Mt. Kilimanjaro. Part II: Habitat selection
Autore:
Hemp, A;
Indirizzi:
Univ Bayreuth, Lehrstuhl Pflanzenphysiol, D-95440 Bayreuth, Germany Univ Bayreuth Bayreuth Germany D-95440 hysiol, D-95440 Bayreuth, Germany
Titolo Testata:
PLANT BIOLOGY
fascicolo: 5, volume: 3, anno: 2001,
pagine: 493 - 523
SICI:
1435-8603(200109)3:5<493:EOTPOT>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPECIES RICHNESS; PATTERNS;
Keywords:
Pteridophytes; diversity; tropical montane forest; life forms; Mt. Kilimanjaro;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Hemp, A Univ Bayreuth, Lehrstuhl Pflanzenphysiol, Univ Str 30, D-95440 Bayreuth, Germany Univ Bayreuth Univ Str 30 Bayreuth Germany D-95440 reuth, Germany
Citazione:
A. Hemp, "Ecology of the pteridophytes on the southern slopes of Mt. Kilimanjaro. Part II: Habitat selection", PLANT BIO, 3(5), 2001, pp. 493-523

Abstract

Based on the evalutation of 957 vegetation plots on the southern slope of Mt. Kilimanjaro, habitat preferences for 140 species of pteridophytes were evaluated. Using the average percentage cover value, and taking into account the pteridophyte flora's composition, life form spectra and its spectra of seasonal growth pattern, eight vegetation formations were recognized. Ferns contributed less than 1% of the vegetation cover of salt marshes, ruderal vegetation, grasslands and (sub-)alpine heathlands. In contrast, pteridophytes constituted the most important vascular plant group on rocks, where 64 species were found, forming about two-thirds of the vegetation cover. With respect to alpha and beta diversity and fern biomass, luxuriant montane forest was the main habitat for pteridophytes on Mt. Kilimanjaro. Here 130 pteridophyte species (93% of the whole pteridophyte flora of the study area), on average, contributed 16% of the total vegetation cover. Epiphytic ferns, tree ferns and filmy ferns had their main distribution between 1900 and 2400 m, in a zone coinciding with the maximum rainfall on Mt. Kilimanjaro'ssouthern slope. Poikilo-hydrous species were typical of dry habitats, suchas on rocks, in meadows or along roadsides, but they also occurred in the often sun-exposed epiphyte layer in moist montane forests. Deciduous species, which were in many cases fire resistant, had a similar distribution; however, inside the forest belt they were restricted to the lower and upper parts, where fires are a common phenomenon. Evergreen species were the dominant group in swamps, forests and forest clearings. Compared to, other volcanoes in East Africa, Mt. Kilimanjaro is distinctly richer in fern species ingeneral and in filmy ferns, tree ferns and epiphytic ferns in particular, suggesting that the forest belt of the southern slope of Mt. Kilimanjaro iswetter than those of other high mountains in East Africa.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 14:19:24