Regulation of life history in the brackish ...
Type de document :
Compte-rendu et recension critique d'ouvrage
DOI :
Titre :
Regulation of life history in the brackish cladoceran Daphniopsis australis (Sergeev & Willams) by temperature and salinity
Auteur(s) :
Ismail, H. N. [Auteur]
Qin, J. G. [Auteur]
Seuront, Laurent [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Qin, J. G. [Auteur]
Seuront, Laurent [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Titre de la revue :
Journal of Plankton Research
Pagination :
763-777
Éditeur :
Oxford University Press (OUP)
Date de publication :
2011
ISSN :
0142-7873
Discipline(s) HAL :
Planète et Univers [physics]/Sciences de la Terre/Océanographie
Résumé en anglais : [en]
Temperature and salinity variations affect aquatic biodiversity by altering the life history of poikilotherms and regulating their population dynamics. This study aimed to reveal the response of the brackish cladoceran, ...
Lire la suite >Temperature and salinity variations affect aquatic biodiversity by altering the life history of poikilotherms and regulating their population dynamics. This study aimed to reveal the response of the brackish cladoceran, Daphniopsis australis exposed to three temperatures (16, 20 and 25°C) cross-classified with three salinities (17, 22 and 27). Our results show a significant interactive effect of temperature and salinity on most life history variables. The individual parameters including longevity, total egg clutch, egg development time, offspring production and total moulting were negatively related to the elevations of temperature and salinity. High salinity dampened the positive relationship between age at first reproduction and increasing temperatures. Population parameters including age-specific survivorship, age-specific fecundity, net reproductive rate and generation time were negatively affected by the increasing temperature and salinity. The intrinsic growth rate showed a unimodal distribution with peak population growth occurred at 20°C and 22 salinity, indicating the optimal condition for population growth. The poor performance of growth, reproduction and development occurred at 25°C and 27 salinity. Considering the dual effects of thermal and saline fluctuation, the life history of D. australis is more greatly impacted by temperature rather than salinity, which can contribute to the explanation of seasonal dynamics of brackish water cladocera in salt lakes.Lire moins >
Lire la suite >Temperature and salinity variations affect aquatic biodiversity by altering the life history of poikilotherms and regulating their population dynamics. This study aimed to reveal the response of the brackish cladoceran, Daphniopsis australis exposed to three temperatures (16, 20 and 25°C) cross-classified with three salinities (17, 22 and 27). Our results show a significant interactive effect of temperature and salinity on most life history variables. The individual parameters including longevity, total egg clutch, egg development time, offspring production and total moulting were negatively related to the elevations of temperature and salinity. High salinity dampened the positive relationship between age at first reproduction and increasing temperatures. Population parameters including age-specific survivorship, age-specific fecundity, net reproductive rate and generation time were negatively affected by the increasing temperature and salinity. The intrinsic growth rate showed a unimodal distribution with peak population growth occurred at 20°C and 22 salinity, indicating the optimal condition for population growth. The poor performance of growth, reproduction and development occurred at 25°C and 27 salinity. Considering the dual effects of thermal and saline fluctuation, the life history of D. australis is more greatly impacted by temperature rather than salinity, which can contribute to the explanation of seasonal dynamics of brackish water cladocera in salt lakes.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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