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Interactive effects of water pH and hardness levels on the growth and reproduction of Heterocypris incongruens (Crustacea: Ostracoda)
Ist Teil von
Hydrobiologia, 2015-07, Vol.753 (1), p.97-109
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2015
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
pH and water hardness are considered to be important factors for population dynamics in crustaceans. In this study, the effects of pH (6, 7, 8, and 9) and water hardness (40 mg CaCO
3
/l and 160 mg CaCO
3
/l) on the growth and reproductive response of the freshwater ostracod
Heterocypris incongruens
Ramdohr were investigated.
Heterocypris incongruens
exposed to a pH level of 6 or 7 had a slower growth rate and shorter carapace length than those exposed to high pH levels. The reproductive output of
H. incongruens
was higher under hard water conditions. However, there were no significant differences in the effects of pH and water hardness on the egg hatching rate. Consequently, higher pH levels and water hardness resulted in increased population growth rates. Collectively, the results indicate that variations in pH levels and water hardness lead to changes in the life history characteristics of
H. incongruens
. These characteristics provide a mechanistic explanation for habitats in which
H. incongruens
can persist.