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Article: Benthic diatoms as indicators of stream sediment concentration in Hong Kong

TitleBenthic diatoms as indicators of stream sediment concentration in Hong Kong
Authors
KeywordsA new diatom index
Motile and attached diatoms
Suspended solids
Issue Date2005
PublisherWiley - V C H Verlag GmbH & Co KGaA.
Citation
International Review Of Hydrobiology, 2005, v. 90 n. 4, p. 412-421 How to Cite?
AbstractDiatoms are photosynthetic unicellular, eukaryotic, microorganisms (algae) that are distinguished by their silicified (SiO2-nH2O) cell walls. They have often been employed to assess salinity, pH, and nutrient conditions. Our data suggest that, they may also be used to assess suspended solid levels in streams. The ratio of motile to attached benthic diatoms from five different stream sites in Hong Kong was correlated with the level of suspended solids for each of these sites. Sites with high concentrations of suspended solids had a high percentage of motile diatoms on their rocks while sites with low concentrations of suspended solids had a high percentage of attached (non-motile) diatoms on their rocks. When water carried by a stream has a high concentration of suspended solids, benthic diatoms in the stream are often covered in a layer of silt. Those diatoms that are motile are able to get on top of this silt layer while attached diatoms cannot. If the silt layer is not washed away, the attached diatoms perish and the percentage of motile diatoms increases. Thus, streams with high concentrations of suspended solids display a higher proportion of motile diatoms than do clear water streams with low concentrations of suspended solids. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.
Persistent Identifierhttp://hdl.handle.net/10722/86319
ISSN
2015 Impact Factor: 1.459
2015 SCImago Journal Rankings: 0.697
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDickman, MDen_HK
dc.contributor.authorPeart, MRen_HK
dc.contributor.authorYim, WWSen_HK
dc.date.accessioned2010-09-06T09:15:24Z-
dc.date.available2010-09-06T09:15:24Z-
dc.date.issued2005en_HK
dc.identifier.citationInternational Review Of Hydrobiology, 2005, v. 90 n. 4, p. 412-421en_HK
dc.identifier.issn1434-2944en_HK
dc.identifier.urihttp://hdl.handle.net/10722/86319-
dc.description.abstractDiatoms are photosynthetic unicellular, eukaryotic, microorganisms (algae) that are distinguished by their silicified (SiO2-nH2O) cell walls. They have often been employed to assess salinity, pH, and nutrient conditions. Our data suggest that, they may also be used to assess suspended solid levels in streams. The ratio of motile to attached benthic diatoms from five different stream sites in Hong Kong was correlated with the level of suspended solids for each of these sites. Sites with high concentrations of suspended solids had a high percentage of motile diatoms on their rocks while sites with low concentrations of suspended solids had a high percentage of attached (non-motile) diatoms on their rocks. When water carried by a stream has a high concentration of suspended solids, benthic diatoms in the stream are often covered in a layer of silt. Those diatoms that are motile are able to get on top of this silt layer while attached diatoms cannot. If the silt layer is not washed away, the attached diatoms perish and the percentage of motile diatoms increases. Thus, streams with high concentrations of suspended solids display a higher proportion of motile diatoms than do clear water streams with low concentrations of suspended solids. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA.en_HK
dc.relation.ispartofInternational Review of Hydrobiologyen_HK
dc.subjectA new diatom indexen_HK
dc.subjectMotile and attached diatomsen_HK
dc.subjectSuspended solidsen_HK
dc.titleBenthic diatoms as indicators of stream sediment concentration in Hong Kongen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1434-2944&volume=90&issue=4&spage=412&epage=421&date=2005&atitle=Benthic+diatoms+as+indicators+of+stream+sediment+concentration+in+Hong+Kongen_HK
dc.identifier.emailPeart, MR:mrpeart@hkucc.hku.hken_HK
dc.identifier.authorityPeart, MR=rp00612en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/iroh.200410806en_HK
dc.identifier.scopuseid_2-s2.0-23944522264en_HK
dc.identifier.hkuros106275en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-23944522264&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume90en_HK
dc.identifier.issue4en_HK
dc.identifier.spage412en_HK
dc.identifier.epage421en_HK
dc.identifier.isiWOS:000231563100006-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridDickman, MD=7005833020en_HK
dc.identifier.scopusauthoridPeart, MR=7003362850en_HK
dc.identifier.scopusauthoridWyss, WSY=6602448210en_HK

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