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15: Community and Ecosystem Ecology

Last updated

Jan 9, 2022
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- 14.3: Human Population Growth
- 15.1: Community Ecology- Species Interactions

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15.1: Community Ecology- Species Interactions
Populations rarely, if ever, live in isolation from populations of other species. In most cases, numerous species share a habitat. The interactions between these populations play a major role in regulating population growth and abundance. All populations occupying the same habitat form a community: populations inhabiting a specific area at the same time. The number of species occupying the same habitat and their relative abundance is known as species diversity.
15.2: Community Structure
15.3: Community Dynamics
15.4: Ecology of Ecosystems
An ecosystem is a community of living organisms and their interactions with their abiotic (non-living) environment. Ecosystems can be small, such as the tide pools found near the rocky shores of many oceans, or large, such as the Amazon Rainforest in Brazil.
15.5: Energy Flow Through Ecosystems
Energy is the ability to do work. Some overlapping examples are kinetic energy, heat energy, potential energy, and chemical energy. Energy flows through a food chain from producers to top-level consumers. Food webs display trophic relationships more accurately because many species are generalists and are eaten by several different species. The number of trophic levels in a community is limited by inefficient energy transfer.

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