What is a keystone species?

Name: Problem 36, Chapter 19: Plant Systematics
Uploaded: 2021-07-24T04:07:36-08:00
Duration: 1 min 18 s
Channel: Joanna Quigley
Description: What is a keystone species?

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Key Concepts

Keystone Species

A keystone species is an organism that has a disproportionately large impact on its environment relative to its abundance. Its role is critical in maintaining the overall structure, health, and diversity of an ecosystem, meaning that changes in its population can lead to significant shifts, affecting many other species and ecological processes.

Ecosystem Dynamics

Ecosystem dynamics are the complex interactions among organisms and between organisms and their physical environment that shape the overall structure and functioning of an ecosystem. Keystone species play a crucial role in these dynamics by regulating natural processes, influencing species interactions, and maintaining ecological balance.

Trophic Cascades

Trophic cascades refer to the chain reactions that occur when changes at one level of the food web, especially involving keystone species, trigger cascading effects that propagate through multiple trophic levels. The removal or decline of a keystone species can disrupt these cascades, leading to significant changes in population sizes and ecosystem stability.

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