10 public questions tagged with this topic.
Robert Costanza and colleagues estimated the value of ecosystem services to be about US $33 trillion per year, nearly twice the global gross national product at that time.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Alien Invasion Co-extinction Mass Extinction - Evil Quartet
Ecosystem services include pollination, soil formation, nutrient cycling, climate regulation, and water purification.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Alien Invasion Co-extinction Mass Extinction - Evil Quartet
Biodiversity loss adversely affects ecosystem services such as pollination, nutrient cycling, climate regulation, and water purification.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Species-Area Relationship
Ecosystem services include pollination, nutrient cycling, climate regulation, soil formation, and many other benefits essential for human well-being.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Patterns of Biodiversity - Latitudinal Gradients
Biodiversity provides ecosystem services such as pollination, nutrient cycling, nutrient storage, climate regulation, flood control, and soil formation.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Patterns of Biodiversity - Latitudinal Gradients
Biodiversity provides essential ecosystem services such as pollination, nutrient cycling, soil formation, climate regulation, and purification of air and water.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Patterns of Biodiversity - Latitudinal Gradients
Ecosystem services include nutrient cycling, water purification, pollination, soil formation, and climate regulation, all of which are essential for life.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Mutualism benefits both species, such as pollinators receiving nectar while aiding plant reproduction.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Ecosystem services are most reliably sustained when multiple species make substantial contributions rather than when function is concentrated in one dominant species. Even contribution raises functional evenness: different taxa participate in production, decomposition, pollination, nutrient retention, or trophic regulation, reducing dependence on a single vulnerable contributor. It can also strengthen the “insurance effect,” because species respond differently to drought, disease, or disturbance; decline of one contributor may be offset by another. This does not mean every species performs an identical role or contributes exactly the same amount. Complementarity among distinct functional traits may be more important than numerical equality, and some keystone species have disproportionate effects. Functional redundancy can buffer loss, but redundancy alone does not guarantee maximum service if redundant species all respond similarly to stress. Communities composed entirely of predators or mutualists are trophically unrealistic and omit processes needed for complete ecosystem functioning. Among the alternatives, even contribution best captures broad participation and low dominance. The general principle is that service delivery depends on abundance distribution, functional identity, and complementarity together, so evenness supports stability without implying that species are ecologically interchangeable.
Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation
Ecosystem services are benefits that functioning ecosystems supply to people, often without direct market transactions. Provisioning services include food, fibre, freshwater, and genetic resources; regulating services include pollination, climate regulation, flood moderation, and water purification. Nutrient cycling and soil formation support production, while landscapes also provide cultural and recreational value. Genetic modification and artificial intelligence are technologies, whereas industrial pollution is an ecological cost. Energy is lost as metabolic heat at every trophic transfer, while elements such as nitrogen and phosphorus are recycled through organisms and the physical environment. Mechanistic interpretation connects individual physiology and species interactions to population change, community composition, and ecosystem-level fluxes. Reliable inference requires the complete experimental design, definitions, units, and statistical evidence; missing labels cannot be reconstructed from an answer key alone. Net primary production equals gross primary production minus plant respiration and represents biomass or energy made available for growth and consumers. Rates must be compared on the same area, biomass, leaf-area, and time basis because changing the denominator can reverse an apparent ecosystem ranking.
Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology
