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Article: The impact of agricultural runoff on stream benthos in Hong Kong, China

TitleThe impact of agricultural runoff on stream benthos in Hong Kong, China
Authors
KeywordsAgricultural runoff
Benthic macroinvertebrates
China
Hong Kong
Organotoxins
Sensitive taxa
Stream
Issue Date2002
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres
Citation
Water Research, 2002, v. 36 n. 12, p. 3103-3109 How to Cite?
AbstractWe investigated three small streams in the New Territories of Hong Kong, China. In each stream, we compared the benthic macroinvertebrate fauna of one site immediately upstream of an area of agricultural land (market gardening) with a second site immediately downstream. Each pair of sites was <300m apart. Samples were taken at the end of the dry season (March 2000) and again (April 2000) just after heavy rainfall had caused runoff from the fields. The total number of taxa at the downstream sites was the same as that in the upstream sites in March. In April, the total taxon richness was lower at the downstream localities although this difference was statistically significant in only one stream. The acute toxic effect of runoff became clearer when focusing on the group of sensitive benthic fauna. The grouping was done by ranking the relatively physiological tolerance to organotoxins following the relevant literature (Bull. Environ. Contam. Toxicol. 67 (2001) 360). All streams showed a significant downstream decrease in the number of sensitive taxa in April, while in two of three streams the number of relatively tolerant taxa increased. Ordination (by n-MDS) confirmed this pattern. It revealed a marked temporal trend in all streams resulting from a decrease of sensitive taxa downstream that was not apparent at the upstream sites. The size of the observed effects varied among streams, and may have reflected differences in the composition of the agricultural runoff. © 2002 Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73407
ISSN
2015 Impact Factor: 5.991
2015 SCImago Journal Rankings: 2.772
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorNeumann, Men_HK
dc.contributor.authorDudgeon, Den_HK
dc.date.accessioned2010-09-06T06:50:59Z-
dc.date.available2010-09-06T06:50:59Z-
dc.date.issued2002en_HK
dc.identifier.citationWater Research, 2002, v. 36 n. 12, p. 3103-3109en_HK
dc.identifier.issn0043-1354en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73407-
dc.description.abstractWe investigated three small streams in the New Territories of Hong Kong, China. In each stream, we compared the benthic macroinvertebrate fauna of one site immediately upstream of an area of agricultural land (market gardening) with a second site immediately downstream. Each pair of sites was <300m apart. Samples were taken at the end of the dry season (March 2000) and again (April 2000) just after heavy rainfall had caused runoff from the fields. The total number of taxa at the downstream sites was the same as that in the upstream sites in March. In April, the total taxon richness was lower at the downstream localities although this difference was statistically significant in only one stream. The acute toxic effect of runoff became clearer when focusing on the group of sensitive benthic fauna. The grouping was done by ranking the relatively physiological tolerance to organotoxins following the relevant literature (Bull. Environ. Contam. Toxicol. 67 (2001) 360). All streams showed a significant downstream decrease in the number of sensitive taxa in April, while in two of three streams the number of relatively tolerant taxa increased. Ordination (by n-MDS) confirmed this pattern. It revealed a marked temporal trend in all streams resulting from a decrease of sensitive taxa downstream that was not apparent at the upstream sites. The size of the observed effects varied among streams, and may have reflected differences in the composition of the agricultural runoff. © 2002 Elsevier Science Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watresen_HK
dc.relation.ispartofWater Researchen_HK
dc.subjectAgricultural runoffen_HK
dc.subjectBenthic macroinvertebratesen_HK
dc.subjectChinaen_HK
dc.subjectHong Kongen_HK
dc.subjectOrganotoxinsen_HK
dc.subjectSensitive taxaen_HK
dc.subjectStreamen_HK
dc.titleThe impact of agricultural runoff on stream benthos in Hong Kong, Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0043-1354&volume=36&spage=3103&epage=3109&date=2002&atitle=The+impact+of+agricultural+runoff+on+stream+benthos+in+Hong+Kong,+Chinaen_HK
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0043-1354(01)00540-1en_HK
dc.identifier.pmid12171409-
dc.identifier.scopuseid_2-s2.0-0036088597en_HK
dc.identifier.hkuros67607en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036088597&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume36en_HK
dc.identifier.issue12en_HK
dc.identifier.spage3103en_HK
dc.identifier.epage3109en_HK
dc.identifier.isiWOS:000177109900021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridNeumann, M=35121897100en_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK

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