BIOB50H3 Lecture Notes - Lecture 8: Insecticide, Ruderal Species, Eosinophil
7 Oct 2015
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Life history in plants: plants are usually categorized by lifespan (& therefore reproduction), annuals: complete their lifespan within one growing season. Semelparous: biennials: complete their lifespan over two growing seasons, year 1: vegetative growth, year 2: reproduction, semelparous, may have vegetative reproduction too, perennials: live and reproduce over 3 or more years. Typically iteroparous: may require several seasons to reach maturity, may be woody, may have several modes of reproduction. Tradeoffs in plants: many traits are determined by competition, environmental stress, and disturbance, competition biotic competition for limited resources, stress any factor that reduces vegetative growth, disturbance any process that destroys plant biomass. Grim"s csr scheme: stress-tolerant plants like cactus, ruderal plants fasat growing and very short-lived. Observation: polluted ponds had more deformed frogs: hypothesis: polluted ponds have higher numbers of ribeiroa, hypothesis: pollution increases the frog"s susceptibility to ribeiroa.
