Ch 37 Communities & Ecosystems.pptx - Communities...

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Communities & Ecosystems Ch. 37
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Outline Community Interactions Energy Flow/Food Web Succession & Species Diversity
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Community Population – a group of individuals of one species Community – groups of different species interacting together Ex: all living things in an intertidal zone Fig. 37.11, pg. 751
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Community Structure Ecological niche – the role of a species in its environment Includes interactions with other organisms & with non-living environment Fig. 37.11, pg. 751
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Community Interaction Interspecific interactions Relationships between different species within the community pg. 744
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Competition (-/-) Competition When different species use the same resource Ex: light, food, water Fig. 37.3, pg. 745
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Mutualism (+/+) Both are benefitted by the relationship Ex: plants & pollinators, lichen (fungi + algae), coral & dinoflagellates Symbiosis : a physically close association between 2 or more species Fig. 37.4, pg. 745
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Predation (+/-) Predation – when one living organism feeds on & kills another Predator eats prey Fig. 36.6, pg. 733
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Prey Defenses Camouflage – blends with environment Mechanical defense - sharp quills, hard shells Chemical defense – poison or bad taste Warning coloration – bright colors signal poison Fig. 37.5, pg. 746 Fig. 35.9, pg. 712
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Herbivory (+/-) Herbivory – animal feeds on plant Coevolution – two organisms adapted to each other Fig. 37.6, pg. 747
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