Answer :
The indicator species are differ from keystone species as Keystone species are people who have a disproportionately huge impact on their environments.
They assist hold biodiversity, and there aren't anyt any different species withinside the environment which could serve their equal function. Without them, their environment might alternate dramatically or ought to even quit to exist.
A keystone species is an organism that facilitates outline a whole surroundings. Keystone species keep biodiversity; their elimination can substantially regulate the dynamics inside the community. While keystone species are important to maintaining their surroundings, they'll or won't be uniquely prone to environmental change—a key function of indicator species.
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Keystone species have a disproportionate impact on ecosystem structure and functioning relative to their abundance, while indicator species signal the health or condition of an ecosystem but don't necessarily have a major impact on it.
Keystone species play critical roles in maintaining the structure and health of their ecosystems, and their removal can have drastic consequences. For example, the intertidal sea star, Pisaster ochraceus, is a keystone species because its predation on mussels prevents the overpopulation of this prey, which otherwise would decrease algae and reduce biodiversity. Conversely, indicator species are those whose presence, absence, or abundance reflects a specific environmental condition or can signify ecosystem health, but they do not necessarily have such a significant impact on ecosystem structure and functioning as keystone species do.
