Book contents
- The Living Planet
- The Living Planet
- Copyright page
- Contents
- Contributors
- Preface
- Acknowledgements
- One Introduction and the Evolution of Life on Earth
- Two Flowering Plants
- Three Bryophytes and Pteridophytes: Spore-Bearing Land Plants
- Four Terrestrial Mammals
- Five Marine Mammals: Exploited for Millennia, But Still Holding On
- Six How Birds Reveal the Scale of the Biodiversity Crisis
- Seven Reptiles
- Eight Amphibians
- Nine Freshwater Fishes: Threatened Species and Threatened Waters on a Global Scale
- Ten The Amazing Yet Threatened World of Marine Fishes
- Eleven Insects
- Twelve Marine Invertebrates
- Thirteen Non-Insect Terrestrial Arthropods
- Fourteen Terrestrial Invertebrates Other Than Arthropods and Molluscs
- Fifteen Non-Marine Molluscs
- Sixteen An Account of the Diversity and Conservation of Fungi and Their Close Relatives
- Seventeen Simple Life Forms
- Eighteen Assessing Species Conservation Status: The IUCN Red List and Green Status of Species
- Nineteen Problems with the World’s Ecosystems: The Future and Attempts to Mitigate Decline
- Twenty Conservation Methods and Successes
- Twenty One What Does the Future Hold for Our Planet and its Wildlife?
- Species Index
- Subject Index
- References
Twelve - Marine Invertebrates
Published online by Cambridge University Press: 13 April 2023
- The Living Planet
- The Living Planet
- Copyright page
- Contents
- Contributors
- Preface
- Acknowledgements
- One Introduction and the Evolution of Life on Earth
- Two Flowering Plants
- Three Bryophytes and Pteridophytes: Spore-Bearing Land Plants
- Four Terrestrial Mammals
- Five Marine Mammals: Exploited for Millennia, But Still Holding On
- Six How Birds Reveal the Scale of the Biodiversity Crisis
- Seven Reptiles
- Eight Amphibians
- Nine Freshwater Fishes: Threatened Species and Threatened Waters on a Global Scale
- Ten The Amazing Yet Threatened World of Marine Fishes
- Eleven Insects
- Twelve Marine Invertebrates
- Thirteen Non-Insect Terrestrial Arthropods
- Fourteen Terrestrial Invertebrates Other Than Arthropods and Molluscs
- Fifteen Non-Marine Molluscs
- Sixteen An Account of the Diversity and Conservation of Fungi and Their Close Relatives
- Seventeen Simple Life Forms
- Eighteen Assessing Species Conservation Status: The IUCN Red List and Green Status of Species
- Nineteen Problems with the World’s Ecosystems: The Future and Attempts to Mitigate Decline
- Twenty Conservation Methods and Successes
- Twenty One What Does the Future Hold for Our Planet and its Wildlife?
- Species Index
- Subject Index
- References
Summary
Marine invertebrates have the greatest abundance and biomass of animals in the Earth system. As a result, they exert a major influence on the structure and function of marine ecosystems through food-web interactions and as ecosystem engineers. Marine invertebrates are also important in terms of the ecosystem services they provide to humankind. In this chapter we review Red List assessments for marine invertebrates, summarise the levels of extinction threat within this group of animals and examine the drivers of decline in affected species. Our findings suggest that only a small fraction of marine invertebrate species have been assessed for extinction threat and even within ‘well’-assessed groups a large proportion of species are categorised as Data Deficient. We find that the proportion of species threatened with extinction can be extremely high (33% in reef-forming corals), with lower levels found for other, less comprehensively assessed groups. The main drivers of extinction risk include habitat loss or degradation through coastal development, pollution or other human activities, overexploitation of species for fisheries, or other purposes, and climate change. Approaches to improve the conservation of marine invertebrates are discussed.
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- The Living PlanetThe State of the World's Wildlife, pp. 249 - 269Publisher: Cambridge University PressPrint publication year: 2023
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