BIOLOGY 1M03 Lecture : 1MO3_Chapter 50.docx
11 Jun 2013
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In ecology, researchers work at four main levels: organisms, populations, communities, and ecosystems. Organismal ecologists explore the morphological, physiological, and behavioural adaptations that allow individuals organisms to live successfully in a particular area: behavioural ecology, reproductive ecology of plants and animals. Eco physiology= physiological ecology of plants and animals. A population is a group of individuals of the same time species that lives in the same area at the same time. Population ecologists focus on how the numbers of individuals in a population change over time. Life history trade-offs between survivorship and reproduction: age structure of populations, modeling of competition, predation, and host-pathogen interactions, modeling of fisheries and other natural harvest. A biological community consists of the species that interact with one another within a particular area. At this level, ecologists also analyze how groups of species respond to natural disturbances such as fire and flood.
