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Fundamentals of Ecology

by Eugene P. Odum · Eugene Odum

Odum's classic ecology textbook, which established the ecosystem as the organising unit of the field. It covers energy flow, biogeochemical cycles, limiting factors, population dynamics and community structure, giving readers a systems-level framework for analysing how ecosystems function and change.

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Introduction to Ecology

Learn ecology basics: populations, communities, ecosystems, and the environment. Free course by Khan Academy Team!

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Introduction to Biology: Ecology

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MarineBio

Nonprofit online reference on ocean life run since 1998, with species profiles and photographs, introductory articles on marine biology and ocean ecosystems, and material on conservation threats. Students gain a broad grounding in marine organisms, their habitats and the pressures facing them.

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