| one publication added to basket [35771] | Recruitment and colonisation of vegetative fragments of Posidonia australis and Posidonia coriacea
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, more
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| Keywords |
Anatomical structures > Body organs > Plant organs > Plant reproductive structures
Anatomical structures > Body organs > Plant organs > Rhizomes
Colonization
Flora > Weeds > Marine organisms > Seaweeds > Sea grass
Population functions > Recruitment
Survival
Posidonia australis J.D.Hooker, 1858 [WoRMS]; Posidonia ostenfeldii Hartog, 1970 [WoRMS]
ISW, Australia, Western Australia, Success Bank
Marine/Coastal |
| Author keywords |
vegetative fragment; recruitment; colonisation; survival; Posidoniaaustralis; Posidonia coriacea |
| Abstract |
Vegetative fragment recruitment of bothPosidonia australis and Posidonia coriacea was observed on Success Bank, Western Australia, beginning in November 1993 (n = 106). Recruitment of vegetative fragments was defined as attachment to the substrate and subsequent rhizome extension. Rhizome extension occurred in 31% of all recruited P. australis vegetative fragments, yet no extension was detected in recruited P. coriacea vegetative fragments. In shallow water (<9 m), P. australis vegetative fragment recruits extended at an average rate of 0.78 ± 0.02 mm per day, but did not survive for more than 10 months. This extension rate was slightly less than in situ meadow rhizomes of established P. australis plants (1.01 ± 0.19 mm per day) from the same depth. The majority (78%) of deep water (10-12 m) P. australis vegetative fragment recruits survived >10 months, with rhizomes extending at slower rates (0.41 ± 0.02 mm per day) than shallow water recruits. No in situ seagrasses grew at the deep site for direct comparison. |
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