#2 Conservation (amphibians)

IUCN

International Union for Conservation of Nature

IUCN Red List

A global system that assesses the conservation status of species

When was the IUCN Red List established?

1964

What is a major advantage of the IUCN Red List?

It provides a global benchmark using consistent criteria

How is the IUCN Red List widely used?

It informs policy decisions and helps with funding priorities

Does the IUCN Red List provide legal protection?

No, it does not directly trigger legal protection

Why must individual countries create their own endangered species lists?

Because legal protection is established at national or state levels

How can political boundaries affect conservation status?

A species may be globally secure but endangered in a specific region

What is an example of a species with differing conservation status?

Rana boylii, which varies by population

Why are many reptiles and amphibians (herps) underestimated in threat level?

IUCN criteria were originally developed for larger animals

What are the main threatened categories in the IUCN Red List?

• Vulnerable

• Endangered

• Critically Endangered

Data Deficient

There is not enough information to assess a species’ risk

When should a species be classified as Data Deficient?

When it is poorly known, such as species from remote areas or single populations

What issue arises when assigning categories to poorly known species?

They may be forced into inaccurate categories

Why are amphibians considered sensitive to environmental change?

They have permeable skin and depend on both aquatic and terrestrial habitats

Why are amphibians called “canaries in the coal mine”?

Because they are early indicators of ecosystem degradation

How does permeable skin affect amphibians?

It makes them vulnerable to pollutants and pathogens

biphasic life cycle

A life cycle involving both aquatic and terrestrial stages

Why is water quality important for amphibians?

They rely on clean water for survival and reproduction

How do narrow geographic ranges affect amphibians?

Small disturbances can quickly make them endangered

When did scientists first widely recognize amphibian declines?

Late 1980s to early 1990s

What major event highlighted amphibian declines globally?

1st World Congress of Herpetology (1989)

What did the 1990 National Research Council workshop conclude?

Amphibian declines were a global phenomenon

What limitation did early studies of amphibian declines have?

Most evidence was anecdotal

Global Amphibian Assessments (GAA) 1

The first global amphibian assessment (2001–2004) covering 5,753 species

What improvements occurred in GAA 2?

Better methods, more collaboration, and 8,011 species assessed

What challenges did GAA 2 face?

Difficulty applying criteria consistently, especially in biodiversity-rich regions like Brazil

What is planned for GAA 3?

Ongoing reassessment (2024–2029) with regular updates and faster inclusion of new species

How often will species be reassessed in future GAAs?

Every 5–10 years

What is the leading cause of amphibian declines?

Habitat loss and degradation

What are some major threats to amphibians included in Habitat loss and degradation?

• Agriculture

• Timber and plant harvesting

• Infrastructure development

• Pollution

What disease has significantly impacted amphibians worldwide?

Batrachochytrium dendrobatidis (Bd)

How does Bd affect amphibians?

It infects the skin, disrupting respiration and often causing cardiac arrest

What percentage of tested species were infected with Bd?

74%

What percentage experienced mortality from Bd?

35%

What human activities contribute to disease spread?

Illegal pet trade and species introductions

What percentage of reptiles are estimated to be threatened?

About 20%

What are major threats to reptiles like sea turtles?

• Bycatch in fishing gear

• habitat loss

• historical egg collection