ecology.org
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Ecology.org is a resource hub focused on ecology and ecosystems, offering articles and explainers on key ecological concepts and current research. It covers biodiversity, conservation, habitat science, ecosystem dynamics, and related topics.
More resources on Ecology & Ecosystems
esa.org
ESA.org is the official site of the Ecological Society of America, a nonprofit scientific society advancing ecology through research, education, and policy. It features news, educational resources, access to ESA journals and publications, student and educator guides, career resources, conferences, and policy information.
Introduction to Ecology
Learn ecology basics: populations, communities, ecosystems, and the environment. Free course by Khan Academy Team!
Fundamentals of Ecology
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.
The Sixth Extinction
Reported account of the current mass extinction, moving between field sites and the history of extinction science. Explains how ocean acidification, habitat fragmentation and species movement are driven by humans, and how biologists measure those losses.
Introduction to Biology: Ecology
Rice University's nine-module Coursera introduction to ecology: niches and competition, island biogeography, species interactions, population growth, and conservation. You come away able to explain how habitat loss, invasive species and climate change destabilize ecosystems.
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.