# Ecology / Webs of Dependence

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Category: Science
Slides: 14
Updated: 2026-05-15T22:19:44.313Z
Tags: catalog, science, ecology

## Summary

— A FIELD GUIDE, PLATE I — ECOLOGY Webs of Dependence Thirteen Plates · on Living Systems Plate II Levels of Organization from a single being to the living Earth organism A single living individual — one oak, one robin, one hyphal strand of fungus. population All members of one species inhabiting a defined place at a defined time. community All populations interacting in the same locality — predators, prey... Key sections include: ECOLOGY; Webs of Dependence; Levels of Organization from a single being to the living Earth; Major Biomes of the Earth climate paints the world in distinct hands; Energy & the Ten-Percent Rule each step up the pyramid loses ninety; Nutrient Cycles matter is borrowed, not consumed; Predator & Prey Lotka & Volterra: a dance in two voices; Niches & Competition Gause's principle of exclusion; Keystone Species remove the stone, the arch falls; Biodiversity Hotspots much, in very little.

## Slide Outline

1. ECOLOGY
2. Webs of Dependence
3. Levels of Organization from a single being to the living Earth
4. Major Biomes of the Earth climate paints the world in distinct hands
5. Energy & the Ten-Percent Rule each step up the pyramid loses ninety
6. Nutrient Cycles matter is borrowed, not consumed
7. Predator & Prey Lotka & Volterra: a dance in two voices
8. Niches & Competition Gause's principle of exclusion
9. Keystone Species remove the stone, the arch falls
10. Biodiversity Hotspots much, in very little
11. Trophic Cascades change at the top reaches the roots
12. The Anthropocene a sixth mass extinction
13. Conservation tools to keep the web from fraying
14. Further Reading & Viewing where to follow these threads onward

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