What is a keystone species?
Correct answer: A. A species that makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival.
- A. A species that makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival.
- B. A common species that has plenty of biomass, yet has a fairly low impact on the community's organization.
- C. A rare species that has minimal impact on the biomass and on other species in the community.
- D. A dominant species that constitutes a large proportion of the biomass and which affects many other species.
Explanation
Keystone species are those species that have a significant and disproportionately large influence on the community structure and characteristics. It has often a considerably low abundance and biomass as compared to dominant species. Removal of such species causes serious disruption in the structure and function of a community.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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