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001-es BibID:	BIBFORM032057
Első szerző:	Korponai János (biológus)
Cím:	Cladocera response to Late Glacial to Early Holocene climate change in a South Carpathian mountain lake / János Korponai, Enikő Katalin Magyari, Krisztina Buczkó, Sanda Iepure, Tadeusz Namiotko, Dániel Czakó, Csilla Kövér and Mihály Braun
Dátum:	2011
ISSN:	0018-8158
Megjegyzések:	This study explores changes in cladocerancomposition in a high mountain lake of the Retezat(Lake Brazi), the South Carpathian Mountains ofRomania, during the Late Glacial-Early Holocene(14,500-11,600 cal. yr. BP) transition using a paleolimnologicalapproach. The lake had a species poorcladoceran community throughout this period. Daphnialongispina, Chydorus sphaericus and Alona affiniswere the most common, showing marked fluctuations in their relative abundances through time. Distinctfaunal response to warming at the Younger Dryas(YD)/Preboreal transition was recorded by increasingfossil densities and distinct community compositionchange: Alona affinis became dominant while numbersof Chydorus sphaericus dramatically decreased.In the Early Holocene, the productivity of Lake Braziseem to have increased as reflected by higher numbersof Cladocera due to appearance of new species (Alonarectangula, A. quadrangularis and A. guttata) whichare common in productive waters. Significant negative correlation was found between average dorsal length of daphnid ephippia and the NGRIP d18O isotopevalues. Given the absence of fish predation, changes inDaphnia ephippia size were taken to indicate climaticchange: larger ephippium size inferred cold conditionsduring the Late Glacial, while smaller size reflectedclimate warming during the Early Holocene. Weconclude that Cladocera fossils are good indicators ofclimatic change that happened during the transitionfrom the Late Glacial to the Holocene. We found thatclimatic conditions can be tracked either by sizedistribution of Daphnia ephippia (larger ephippiumsize under colder climate) and/or by communitychange of cladocerans.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban Cladocera remains Chydorids Climate change Mountain lake Romania
Megjelenés:	Hydrobiologia. - 676 : 1 (2011), p. 223-235. -
További szerzők:	Magyari Enikő (1973-) (biológus) Buczkó Krisztina (1962-) (biológus) Iepure, Sanda Namiotko, Tadeusz Czakó Dániel Kövér Csilla Braun Mihály (1966-) (vegyész, analitikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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