notes ecology - -ecology: study of interactions of...

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-ecology: study of interactions of organisms -population: individuals of one species in one area, interbreeding and interacting -community: consist of all organisms in one area -ecosys: all organisms in area + abiotic factors -abiotic: rock, soil, temp, water, -biosphere: global ecosys *properties of pop 1. Size (N): total num of individuals 2. Density: num of individuals per unit area 3. Dispersion: pattern of spacing individuals (1) clumped • most common • Fish (2) Uniform • plants w/ toxins (3) Random • no attraction/repulsion • Trees *Survivorship curves -show size and composition 1. Type 1 • high in old age • great parenting • humans 2. Type 2 • constant death rate • reptile, rodent, hydra 3. Type 3 • high death of young • death rate declines as older • fish, invertebrates (eggs) • external fertilization, no parenting
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*Age structure diagrams -relative num of individuals at each age *Population growth
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notes ecology - -ecology: study of interactions of...

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