17-ch34-ecology

17-ch34-ecology - Chapter 34 The Biosphere Ecologists study...

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Chapter 34 The Biosphere
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Ecologists study how organisms interact with their environment ecology – study of interactions of organisms with 1) each other & 2) their physical environment ecosystem - natural unit consisting of all plants, animals and micro-organisms ( biotic factors) in an area functioning together with all of the non-living physical ( abiotic ) factors of the environment biotic components – organisms that are part of environment abiotic components biosphere – global ecosystem; entire portion of Earth inhabited by life; sum of all the planet's ecosystems biome – one of the world's major ecosystems, classified according to the predominant vegetation & characterized by adaptations of organisms to that particular environment habitat oikos = “home”
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Interactions occur at several different levels organismal population – dynamics of a population (within a species) community – all populations (of different species) inhabiting the same space at the same time
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solar energy – powers ecosystems important exception: hydrothermal vents at bottom of ocean water – essential to all life; organisms must maintain water balance (solute concentration relative to environment)
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This note was uploaded on 06/18/2011 for the course BIOL 1334 taught by Professor Staff during the Spring '08 term at UT Arlington.

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17-ch34-ecology - Chapter 34 The Biosphere Ecologists study...

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