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Article: The life history, secondary production and microdistribution of Ephemera spp. (ephemeroptera: ephemeridae) in a tropical forest stream

TitleThe life history, secondary production and microdistribution of Ephemera spp. (ephemeroptera: ephemeridae) in a tropical forest stream
Authors
Issue Date1996
PublisherE Schweizerbart'sche Verlagsbuchhandlung. The Journal's web site is located at http://www.schweizerbart.de/j/archiv-hydrobiologie
Citation
Archiv Fur Hydrobiologie, 1996, v. 135 n. 4, p. 473-483 How to Cite?
AbstractThe ecology of ephemerid mayflies was investigated in Tai Po Kau Forest Stream (TPKFS), New Territories, Hong Kong, over a two-year period. Quantitative benthic samples of larvae were taken from different microhabitats within stream riffles on 45 occasions, and combined with light-trap captures of adults, were used as a basis for investigating life-history patterns and estimating secondary production. Two species, Ephemera (Ephemera) spilosa and E. (Aethephemera) pictipennis were collected, of which the former was more abundant (mean densities ± 95 % confidence limits = 11.06 ± 1.48 versus 0.48 ± 0.26 indiv. m-2). Larvae of E. (E.) spilosa were patchily distributed. Mean densities in microhabitats close to the stream banks, where sediments were relatively fine grained, were >50% greater than those in midstream; however, this difference was not statistically significant. Both ephemerids were univoltine in TPKFS, but emergence of adult E. (A.) pictipennis was highly synchronized (in April), while E. (E.) spilosa emerged later over a more extended period (mainly May-July). Annual production of E. (E.) spilosa (in terms of ash-free dry weight, AFDW) in the study reach was estimated at 24.26 mg AFDW m-2 using the size-frequency method; the dry-weight (DW) annual production estimate was 37.28 mg DW m-2. Densities of E. (A.) pictipennis were too low to allow reliable production estimates. Production: biomass ratios for E. (E.) spilosa were 3.79 (AFDW) and 3.67 (DW), and within the range of values reported for ephemerids elsewhere.
Persistent Identifierhttp://hdl.handle.net/10722/73404
ISSN
2008 Impact Factor: 1.293
References

 

DC FieldValueLanguage
dc.contributor.authorDudgeon, Den_HK
dc.date.accessioned2010-09-06T06:50:57Z-
dc.date.available2010-09-06T06:50:57Z-
dc.date.issued1996en_HK
dc.identifier.citationArchiv Fur Hydrobiologie, 1996, v. 135 n. 4, p. 473-483en_HK
dc.identifier.issn0003-9136en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73404-
dc.description.abstractThe ecology of ephemerid mayflies was investigated in Tai Po Kau Forest Stream (TPKFS), New Territories, Hong Kong, over a two-year period. Quantitative benthic samples of larvae were taken from different microhabitats within stream riffles on 45 occasions, and combined with light-trap captures of adults, were used as a basis for investigating life-history patterns and estimating secondary production. Two species, Ephemera (Ephemera) spilosa and E. (Aethephemera) pictipennis were collected, of which the former was more abundant (mean densities ± 95 % confidence limits = 11.06 ± 1.48 versus 0.48 ± 0.26 indiv. m-2). Larvae of E. (E.) spilosa were patchily distributed. Mean densities in microhabitats close to the stream banks, where sediments were relatively fine grained, were >50% greater than those in midstream; however, this difference was not statistically significant. Both ephemerids were univoltine in TPKFS, but emergence of adult E. (A.) pictipennis was highly synchronized (in April), while E. (E.) spilosa emerged later over a more extended period (mainly May-July). Annual production of E. (E.) spilosa (in terms of ash-free dry weight, AFDW) in the study reach was estimated at 24.26 mg AFDW m-2 using the size-frequency method; the dry-weight (DW) annual production estimate was 37.28 mg DW m-2. Densities of E. (A.) pictipennis were too low to allow reliable production estimates. Production: biomass ratios for E. (E.) spilosa were 3.79 (AFDW) and 3.67 (DW), and within the range of values reported for ephemerids elsewhere.en_HK
dc.languageengen_HK
dc.publisherE Schweizerbart'sche Verlagsbuchhandlung. The Journal's web site is located at http://www.schweizerbart.de/j/archiv-hydrobiologieen_HK
dc.relation.ispartofArchiv fur Hydrobiologieen_HK
dc.titleThe life history, secondary production and microdistribution of Ephemera spp. (ephemeroptera: ephemeridae) in a tropical forest streamen_HK
dc.typeArticleen_HK
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0030039322en_HK
dc.identifier.hkuros13764en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030039322&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume135en_HK
dc.identifier.issue4en_HK
dc.identifier.spage473en_HK
dc.identifier.epage483en_HK
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK

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