Threats to Biological Diversity Flashcards Preview

Conservation Biology > Threats to Biological Diversity > Flashcards

Flashcards in Threats to Biological Diversity Deck (9)
Loading flashcards...
1

Habitat destruction (example)

Coral reefs
– Destructive fishing
– cyanide fishing
– segmentation
– eutrophication
– coral bleaching

2

Fragmentation example

E.g. Madagascar
More area exposed to edge effects
Population divided and less gene flow

3

Degradation

.

4

Global Climate Change

.

5

Overexploitation examples

Bushmeat
Cod stocks - fishing down the food web
Tropical timber – big trees older
Whaling

6

How Invasive species are introduced into new areas? (4)

1. Colonisation by people – E.g. Rabbits in Australia
2. Horticulture, agriculture and forestry
3. Accidental transportation - e.g. ship ballast
4. Biological control – e.g. cane toads

7

Disease - three examples

Western lowland gorillas - Central Africa
African wild dogs - Serengeti-Mara
Monks seals West Africa

8

How can human activities affect disease incidence in wild animals

Increased contact with possible diseases

9

How can contact with possible diseases be increased by human activities:

Alter host density
Alter parasite density
New transmission routes
By introducing reservoir hosts