LIFE SCIENCE

Detailed explanation-1: -Keystone species are those which have an extremely high impact on a particular ecosystem relative to its population. Keystone species are also critical for the overall structure and function of an ecosystem, and influence which other types of plants and animals make up that ecosystem.

Detailed explanation-2: -In a marine ecosystem, or any type of ecosystem, a keystone species is an organism that helps hold the system together. Without its keystone species, ecosystems would look very different. Some ecosystems might not be able to adapt to environmental changes if their keystone species disappeared.

Detailed explanation-3: -A keystone species is a plant, animal, fungi, or even bacteria that has a disproportionately large impact on their ecosystem. They play an important role in their natural environments as their impact on other species can reshape entire ecosystems.

Detailed explanation-4: -Keystone species are defined as strongly interacting species that have a large impact on their ecosystems relative to their abundance, while ecosystem engineers are species that, with their growth, are able to change the feature of the habitat where they live, such as hard corals.