Competition in depleting resource environments shapes the thermal response of mosquito population fitness

摘要: O_LIA populations maximal growth rate (rm) depends on the survivorship, development, and reproduction of its individuals. In ectotherms, these (functional) traits respond predictably to temperature, which provides a basis for predicting how climatic warming could affect natural populations, including disease vectors diseases they transmit. C_LIO_LISuch predictions generally arise from mathematical models that incorporate temperature-dependence (thermal performance curves) measured under laboratory conditions. Therefore, accuracy relevance lab-measured trait thermal curves However, joint effect temperature resource availability--another key limiting environmental factor in nature--on is largely unknown. C_LIO_LIWe investigated larval competition ecologically-realistic depleting resources affects rm underlying life history vector Aedes aegypti. We show at food concentrations below certain threshold drastically depresses across entire range, causes it peak lower narrows breadth temperatures over positive (the niche breath). C_LIO_LIThis resource-dependence curve driven primarily by fact delays development increases juvenile mortality. This compounded reduced size maturity, turn decreases adult lifespan fecundity. C_LIO_LIThese results intensified environments can significantly modulating responses predictable way. has important implications forecasting effects climate change population dynamics field not just vectors, but holometabolous insects general. C_LI