Epiphytes on the seagrasses of Zanzibar Island (Tanzania), floristic and ecological aspects

Citation
F. Leliaert et al., Epiphytes on the seagrasses of Zanzibar Island (Tanzania), floristic and ecological aspects, BELG J BOT, 134(1), 2001, pp. 3-20
Citations number
43
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Plant Sciences
Journal title
BELGIAN JOURNAL OF BOTANY
ISSN journal
0778-4031 → ACNP
Volume
134
Issue
1
Year of publication
2001
Pages
3 - 20
Database
ISI
SICI code
0778-4031(2001)134:1<3:EOTSOZ>2.0.ZU;2-I
Abstract
The species composition and ecology of the seagrass epiphytes of Zanzibar I sland (Tanzania) al-e discussed. Thalassodendron ciliatum, a subtidal seagr ass species, had the highest epiphyte cover, followed by Enhalus acoroides, Halodule uninervis, Cymodocea rotundata and Thalassia hemprichii. A total of 49 taxa of macroalgae (5 of which are new records For the East African c oast) was recorded as epiphytes on seagrasses; the Rhodophyta form the larg est fl action, exceeding the Chloro- and Phaeophyta both in species number and abundance. The preference of the epiphytes for certain host plants was mainly related to the ecological parameters of the habitat of the hosts suc h as tidal level, depth and relative rate of water flow, Epiphytes were mos t abundant in the subtidal zone where they were best developed on the peren nial stems rather than on the ephemeral leaves. Differences in species comp osition and abundance were also observed between different parts of the ste ms and leaf tufts. Distinctive species compositions characterize these diff erent habitats and plant parts. The zonation of seagrasses and their associ ated epiphytes along transects through a tide channel in Chwaka Bay is also described.