Drylands: Biodiversity Hotspots at Risk (37 chars)

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Create PowerPoint slides (Slides 7–12) about drylands, biodiversity, ecosystem services, and degradation. Include the following details: ### Slide 7: What are Drylands? - Definition: Arid to semi-arid regions with low, irregular precipitation (<500 mm/year) and high evapotranspiration, causing water scarcity. - Global coverage: ~41-42% of Earth's land surface (~62 million km²). - Population: 2-2.7 billion people (~38% of global population). - Key ecosystems: Grasslands, savannas, shrublands, deserts. - Visual: World map highlighting dryland regions in orange/brown. ### Slide 8: Importance of Drylands for Biodiversity - High endemism and diversity; 25% of global terrestrial biodiversity in <1% protected areas. - Grasslands & savannas support herbivores and pollinators. - Vulnerability to climate extremes. - Visual: Photo of endemic dryland species (e.g., acacia with birds). ### Slide 9: Ecosystem Services: Carbon Storage & Forage - Store ~30–40% of global soil carbon. - Provide forage for 50% of world’s livestock. - Other services: Water regulation, soil stabilization. - Visual: Infographic showing carbon cycle in dryland grasslands. ### Slide 10: High Vulnerability of Dryland Ecosystems - Threats: Overgrazing, land conversion, climate change. - Endemic species extinction risks. - Restoration benefits: 50% biodiversity recovery in 5–10 years. - Visual: Healthy vs. degraded savanna. ### Slide 11: Current State: Degradation Impacts - 10–20% of drylands degraded (~12 million km²). - Productivity losses (20–50%). - Human toll: Food insecurity, migration. - Visual: Before/after image of degradation. ### Slide 12: Under-Protected Areas & Restoration Needs - Only 15–20% protected. - Degradation trends: 0.5–1% annual loss. - Path forward: 30x30 conservation, restoration, re-seeding. - Visual: Map of protected vs. unprotected drylands. Use consistent visual style, large readable text, and relevant high-quality photos or icons.

Explores drylands (41% Earth's land, 2.7B people), hosting 25% global biodiversity in <1% protected areas. Covers ecosystem services (30-40% soil C, livestock forage), degradation (10-20% affected, 20

December 15, 20256 slides

Slide 1 of 6

Slide 1 - What are Drylands?

Drylands are regions characterized by less than 500 mm of annual rainfall and high evapotranspiration, encompassing grasslands, savannas, shrublands, and deserts. They cover 41-42% of Earth’s land (~62 million km²) and support 2-2.7 billion people (~38% of the global population).

What are Drylands?

Characterized by <500 mm annual rainfall and high evapotranspiration
Cover 41-42% of Earth’s land (~62 million km²)
Home to 2-2.7 billion people (~38% global population)
Include grasslands, savannas, shrublands, and deserts

Speaker Notes

Definition: Arid to semi-arid regions with low, irregular precipitation (<500 mm/year) and high evapotranspiration, causing water scarcity. Visual: World map highlighting dryland regions in orange/brown.

Slide 2 of 6

Slide 2 - Importance of Drylands for Biodiversity

Drylands host 25% of global terrestrial biodiversity and support herbivores and pollinators in grasslands and savannas. Yet, less than 1% are protected worldwide, leaving them vulnerable to climate extremes.

Importance of Drylands for Biodiversity

Hosts 25% of global terrestrial biodiversity
Less than 1% protected areas worldwide
Supports herbivores and pollinators in grasslands/savannas
Vulnerable to climate extremes

Speaker Notes

Visual: Photo of endemic dryland species (e.g., acacia with birds). High endemism/diversity: 25% global terrestrial biodiversity in <1% protected areas. Grasslands/savannas support herbivores, pollinators. Vulnerable to climate extremes.

Slide 2 - Importance of Drylands for Biodiversity

Slide 3 of 6

Slide 3 - Ecosystem Services: Carbon Storage & Forage

Drylands store 30-40% of global soil carbon. They also provide 50% of the world's livestock forage.

Ecosystem Services: Carbon Storage & Forage

30-40%: Global Soil Carbon

Stored in dryland soils

50%: World Livestock Forage

Provided by drylands

Slide 3 - Ecosystem Services: Carbon Storage & Forage

Slide 4 of 6

Slide 4 - High Vulnerability of Dryland Ecosystems

Dryland ecosystems face high vulnerability from threats like overgrazing, land conversion, climate change, habitat loss, and extreme weather, endangering endemic species with extinction risks. Targeted restoration offers benefits, achieving 50% biodiversity recovery in 5-10 years while enhancing ecosystem resilience and services.

High Vulnerability of Dryland Ecosystems

Threats	Restoration Benefits
Overgrazing, land conversion, and climate change drive degradation. Endemic species face high extinction risks due to habitat loss and extreme weather.	Targeted restoration yields 50% biodiversity recovery in 5-10 years, enhancing ecosystem resilience and services.

Slide 5 of 6

Slide 5 - Current State: Degradation Impacts

Currently, 10–20% of drylands (~12M km²) are degraded, causing 20–50% productivity losses. This results in human impacts like food insecurity and migration.

Current State: Degradation Impacts

10–20% drylands degraded (~12M km²)
Productivity losses: 20–50%
Human impacts: food insecurity, migration

Slide 6 of 6

Slide 6 - Under-Protected Areas & Restoration Needs

Drylands are only 15-20% protected and face 0.5-1% annual land degradation. The path forward includes the 30x30 conservation initiative and restoration via re-seeding and habitat recovery.

Under-Protected Areas & Restoration Needs

Drylands: Only 15-20% protected
Degradation: 0.5-1% annual land loss
Path forward: 30x30 conservation initiative
Restoration: Re-seeding and habitat recovery

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