BIO120H1 Lecture Notes - Lecture 23: Morphine, Selective Breeding, Nicotine

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Spencer Barrett

Document Summary

Direct and indirect interactions embedded in food webs; trophic cascades. Insect-plant relationships often specialized, vertebrate-plant relationships less so. Involve the energy transferred from organisms eating other organisms. Primary producers plants: green, photosynthesizing plants, their food is sunlight, so they"re able to transduce solar energy into carbon compounds, they"re the base of terrestrial and most oceanic food chains. Secondary consumers carnivores who eat herbivores: carnivores consume the primary consumers. Tertiary consumers carnivores who eat secondary consumers. Detritivores eat dead organic matter at various stages of decomposition: reduce the structures to smaller and smaller oxidized molecules. Trophic connections among species can be analyzed as interaction webs with network properties like connectance : properties of connectedness from the internet are also being applied to connections of food webs. More important, trophic relations can determine community structure in ways that can be investigated by removal experiments. Looking at interactions between plants that grow in old-field successional communities and the insects that eat them.