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Title

An experimental test of the occurrence of competitive interactions among SE Asian seagrasses

AuthorsDuarte, Carlos M. ; Terrados, Jorge ; Agawin, Nona S. R. ; Fortes, Miguel D.
KeywordsInterspecific ompetition
Tropical seagrasses
SE Asia
Issue Date12-May-2000
PublisherInter Research
CitationMarine Ecology Progress Series (MEPS) 197: 231-240 (2000)
AbstractThe occurrence of competitive interactions among the seagrass species present in a multispecific SE Asian seagrass meadow was tested by the cumulative removal of shoots of an increasing number of seagrass species from the meadow in order of decreasing and increasing resource requirements for plant growth. The removal of shoots of the dominant species Thalassia hemprichii had very few effects on shoot size, shoot density and leaf area index of the extant seagrass species. The shoot density of Enhalus acoroides decreased when T. hemprichii shoots were removed, but that of Syringodium isoetifolium increased when the shoots of all the species with higher resource requirements than itself were removed from the experimental plots. The size of Halophila ovalis shoots decreased by 30% when both T. hemprichii and E. acoroides shoots were removed from the plots. The shoot density of T. hemprichii increased only when the shoots of all the accompanying species were removed from the plots. The results show that species interactions in this multispecific seagrass meadow are asymmetric. The elucidation of the nature of the interactions among seagrass species provides a key to understanding the maintenance of the high biodiversity and production that characterizes pristine SE Asian coastal ecosystems.
Description10 pages, 7 figures.
Publisher version (URL)http://dx.doi.org/10.3354/meps197231
URIhttp://hdl.handle.net/10261/11118
DOI10.3354/meps197231
ISSN0171-8630
E-ISSN1616-1599
Appears in Collections:(IMEDEA) Artículos
(CEAB) Artículos
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