Pubblicazione scientifica

Effect of Clonal Selection on Daphnia Tolerance to Dark Experimental Conditions

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e cattura

RIASSUNTO

Recent studies have demonstrated substantial effects of environmental stress that vary among clones. Exposure to ultraviolet radiation (UV) is an important abiotic stressor that is highly variable in aquatic ecosystems due to diel and seasonal variations in incident sunlight as well as to differences in the UV transparency of water among water bodies, the depth distribution of organisms, and the ability of organisms to detect and respond to UV. In contrast to the convention that all UV is damaging, evidence is accumulating for the beneficial effects of exposure to low levels of UV radiation. Whereas UV has been frequently observed as the primary light-related stressor, herein we present evidence that dark conditions may be similarly “stressful” (reduction of overall fitness), and stress responses vary among clones of the freshwater crustacean Daphnia parvula. We have identified a significant relationship between survivorship and reduced fecundity of clones maintained in dark conditions, but no correlation between tolerance of the clones to dark and UV radiation. Low tolerance to dark conditions can have negative effects not only on accumulated stresses in organisms (e.g. the repair of UV-induced damage in organisms with photolyase), but potentially on the overall physiology and fitness of organisms. Our results support recent evidence of the beneficial effects of low-level UV exposure for some organisms.

DATA

Data di pubblicazione: 19/07/2016

AUTORI

CONNELLY SANDRA J
STOECKEL JAMES A
GITZEN ROBERT A
WILLIAMSON CRAIG E
GONZALEZ MARIA J

ENTE DI AFFERENZA

THOMAS H GOSNELL SCHOOL OF LIFE SCIENCES ROCHESTER INST TECH ROCHESTER NY 14623 USA
SCHOOL OF FISHERIES AQUACULTURE & AQUATIC SCIENCES COLLEGE OF AGRICULTURE AUBURN UNIV AUBURN AL 36849 USA
DEPT BIOLOGY MIAMI UNIV OXFORD OH 45056 USA
SCHOOL OF FORESTRY & WILDLIFE SCIENCES AUBURN UNIV AUBURN AL 36849 USA
FEDERAL UNIV RIO DE JANEIRO BRAZIL

RIVISTA

PLoS ONE, 11(7), e0159628

IMPACT FACTOR

2,870

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