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Phosphorus availability mediates plasticity in life‐history traits and predator–prey interactions in Daphnia
Author(s) -
Jeyasingh Punidan D.,
Weider Lawrence J.
Publication year - 2005
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/j.1461-0248.2005.00803.x
Subject(s) - daphnia pulex , biology , kairomone , fecundity , phenotypic plasticity , predation , branchiopoda , daphnia , predator , ecology , cladocera , bosmina , phosphorus , life history theory , zoology , adaptation (eye) , clone (java method) , zooplankton , life history , population , gene , biochemistry , neuroscience , materials science , demography , sociology , metallurgy
We analysed growth plasticity of two Daphnia pulex clones under low‐phosphorus (LP) and high phosphorus (HP) conditions, in the presence of Chaoborus kairomones to examine how food quality (P‐availability) might impact life‐history responses and vulnerability to predation. Overall, clone 1 grew faster, and was larger at maturity. Under HP, both clones responded to kairomones by increasing growth, age and size at maturity, and decreasing fecundity. Under LP, both clones suffered reduced growth, and fecundity. However, the magnitude of response to kairomones depended on a clone by P‐availability interaction. Chaoborus presented a 1 : 1 clonal mixture under HP or LP, consumed more individuals under LP. Moreover, fewer clone 1 individuals were consumed. Studying the effects of P‐availability on life histories, and predator–prey interactions may help us understand the mechanisms generating and maintaining plasticity, as well as influencing genotypic diversity and microevolutionary processes in natural populations.