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Article: Spatial and temporal variation of cyanobacteria-dominated epilithic communities on a tropical shore in Hong Kong

TitleSpatial and temporal variation of cyanobacteria-dominated epilithic communities on a tropical shore in Hong Kong
Authors
Issue Date1999
PublisherInternational Phycological Society. The Journal's web site is located at http://www.intphycsoc.org/IPSPhycologia.lasso
Citation
Phycologia, 1999, v. 38 n. 5, p. 385-393 How to Cite?
AbstractSpecies abundance (percentage surface cover) and overall biomass (chlorophyll a) of cyanobacteria-dominated epilithic communities were assessed for 19 months on a semiexposed, rocky shore in Hong Kong. Thirty-three cyanobacterial species, as well as diatoms and macroalgae, were recorded. Cyanobacteria were found at all levels below the supralittoral zone, which was bare owing to the small splash zone. The upper eulittoral zone was dominated by coccoid species, especially a brown band of Gloeocapsa pleurocapsoides. A black band of Kyrtuthrix maculans dominated the lower part of the upper eulittoral. A variety of filamentous and coccoid cyanobacteria were recorded in the mid eulittoral, and a thin film of the encrusting red alga Hildenbrandia rubra dominated the lower eulittoral. Chlorophyll a levels peaked in the mid eulittoral and were lowest in the supralittoral. Broad zonation patterns were consistent throughout the year, but there was a clear seasonal variation in species abundance. In winter, macroalgae and diatoms dominated the shore, although the species composition varied year to year. Species richness of cyanobacteria was highest in winter, and nonheterocystous filamentous species (Lyngbya spp., Oscillatoria spp.) dominated. With increasing air temperatures, macroalgae, diatoms, and some cyanobacterial species died; however, species such as Kyrtuthrix and Gloeocapsa appeared to be high-temperature tolerant and increased in summer. Toward the end of summer, heterocystous cyanobacteria (e.g. Calothrix spp.) proliferated. Chlorophyll a levels were highest in winter in the mid and low eulittoral, and they greatly decreased in summer, especially in the high supralittoral. On Hong Kong shores, temporal variation in species richness, abundance, and biomass of cyanobacteria is strongly influenced by seasonal changes in environmental conditions.
Persistent Identifierhttp://hdl.handle.net/10722/73409
ISSN
2015 Impact Factor: 1.628
2015 SCImago Journal Rankings: 0.869
References

 

DC FieldValueLanguage
dc.contributor.authorNagarkar, Sen_HK
dc.contributor.authorWilliams, GAen_HK
dc.date.accessioned2010-09-06T06:51:00Z-
dc.date.available2010-09-06T06:51:00Z-
dc.date.issued1999en_HK
dc.identifier.citationPhycologia, 1999, v. 38 n. 5, p. 385-393en_HK
dc.identifier.issn0031-8884en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73409-
dc.description.abstractSpecies abundance (percentage surface cover) and overall biomass (chlorophyll a) of cyanobacteria-dominated epilithic communities were assessed for 19 months on a semiexposed, rocky shore in Hong Kong. Thirty-three cyanobacterial species, as well as diatoms and macroalgae, were recorded. Cyanobacteria were found at all levels below the supralittoral zone, which was bare owing to the small splash zone. The upper eulittoral zone was dominated by coccoid species, especially a brown band of Gloeocapsa pleurocapsoides. A black band of Kyrtuthrix maculans dominated the lower part of the upper eulittoral. A variety of filamentous and coccoid cyanobacteria were recorded in the mid eulittoral, and a thin film of the encrusting red alga Hildenbrandia rubra dominated the lower eulittoral. Chlorophyll a levels peaked in the mid eulittoral and were lowest in the supralittoral. Broad zonation patterns were consistent throughout the year, but there was a clear seasonal variation in species abundance. In winter, macroalgae and diatoms dominated the shore, although the species composition varied year to year. Species richness of cyanobacteria was highest in winter, and nonheterocystous filamentous species (Lyngbya spp., Oscillatoria spp.) dominated. With increasing air temperatures, macroalgae, diatoms, and some cyanobacterial species died; however, species such as Kyrtuthrix and Gloeocapsa appeared to be high-temperature tolerant and increased in summer. Toward the end of summer, heterocystous cyanobacteria (e.g. Calothrix spp.) proliferated. Chlorophyll a levels were highest in winter in the mid and low eulittoral, and they greatly decreased in summer, especially in the high supralittoral. On Hong Kong shores, temporal variation in species richness, abundance, and biomass of cyanobacteria is strongly influenced by seasonal changes in environmental conditions.en_HK
dc.languageengen_HK
dc.publisherInternational Phycological Society. The Journal's web site is located at http://www.intphycsoc.org/IPSPhycologia.lassoen_HK
dc.relation.ispartofPhycologiaen_HK
dc.titleSpatial and temporal variation of cyanobacteria-dominated epilithic communities on a tropical shore in Hong Kongen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0031-8884&volume=38&issue=5&spage=385&epage=393&date=1999&atitle=Spatial+and+temporal+variation+of+cyanobacteria-dominated+epilithic+communities+on+a+tropical+shore+in+Hong+Kongen_HK
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hken_HK
dc.identifier.authorityWilliams, GA=rp00804en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0032748239en_HK
dc.identifier.hkuros53771en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032748239&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume38en_HK
dc.identifier.issue5en_HK
dc.identifier.spage385en_HK
dc.identifier.epage393en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridNagarkar, S=6602572935en_HK
dc.identifier.scopusauthoridWilliams, GA=7406082821en_HK

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