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
Three - Bryophytes and Pteridophytes: Spore-Bearing Land Plants
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
Spore-bearing land plants are much fewer in number than flowering plants, with around 20,000 bryophytes and 12,000 pteridophytes, but they have a much longer history, with the first recognisable land plant fossil dating from the Silurian. Bryophytes and pteridophytes are not a significant food source for man, nor do they provide essential commodities like timber or cloth, but they have a significant role in maintaining healthy ecosystems and storing carbon, and bryophytes deliver key ecological functions in arctic, boreal and peatland ecosystems. The major threats to bryophytes and pteridophytes are habitat loss and climate change, followed by overexploitation. Global conservation assessments are available for just 1.5 percent of bryophyte species and 5.7 percent of pteridophytes. However, progress towards an accessible worldwide flora is growing through international collaboration and coordination, and molecular studies are increasing understanding of relationships between species, genera and families.
- Type
- Chapter
- Information
- The Living PlanetThe State of the World's Wildlife, pp. 37 - 64Publisher: Cambridge University PressPrint publication year: 2023
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