Ex-situ and in-situ conservation Flashcards
What is conservation
Maintaining and protecting a living and changing environment
what is insitu conservation
process of conserving species in their natural habitat by limiting the impact of human development and maintaing the habitats natural features
What are the 2 forms conservation takes place
Legilsation Wildlife reserves (including marine conservation zones)
Laws can be passed to try to stop the :
1) Stop hurting of animals
2) Stop clearing natural habitats for things like agriculture
3) Stop the illegal trade of endangered species
What are examples of insitu conservation:
protected habitats i.e national parks
What are examples of ex-situ conservation
Zoos and seed banks
What are the conflicts with humans for insitu conservation
The need for indigenous people may conflict with the conservation efforts (food, econmic devleoplment )
Protected animals (increasing population sizes) may start to impact on neaby farmland
What are the advantages of in situ conservation
Protects more than one species
More likely to survive in the wild (little human contact)
Can protect the whole population
What are the disadvantges of in situ conservation
Hard to enforce bans on hunters/ pachers
No protection from climate change
What are the disadvantage of ex- situ conservation
Can be expensive to set uop
Can only care for small numbers
less successful at reintroduction
Breeding can be less successful in captivity
What are the advantges of ex situ conservation
Requires little space and eliminates predators and poaches
What are the problems with captive breeding and reintroduction 1/3
not enough space or sufficient resources in zoos and parks for all the endangered species
animals that have been bred in captivity may have great problems in adjusting ti unsupported life in the wild
What is the role of seed banks
place where seeds are stored to preserve genetic diversity for the future.
What is it better to store seeds than adult plants
seeds are produced in excess
Take up little space and can store a large number
Cheaper to transport
Great genetic diversity
What role do national parks play in conservation
protect and conserve native speices
examples of national parks
Serengeti national park (Tazania)
Everglades (USA)
What is ex-situ conservation
conservation living organisms outside their natural habitat
How do Zoos help?
They have captive breeding programmes
Zoos also help to conserve gene pools
once event is over the species can be reintroduced into suitable habitats
Why do seed collections contain samples from a range of populations and areas?
To maximise gentic diversity
What are the reasons for keeping zoos
Education about about endarged species
Save endarged species
Protect from poachers
breeding programmes
Reasons agasint zoos
Certain species favoured
captive breeding programs may not successfully release animals back into the wild
animals suffer stress, boredom, confinement, change behaviour / habitat differs
how do seed banks select seeds for storage?
from different plants to provide genetic diversity
it also x rayed to check for viable embryos
What conditions do seeds need to be kept in?
Dry and cold
To prevent enzyme activity
To prevent germination of seeds
How does captive breeding ensure getnic diviersty
It will increase population
Stud book kept of breeding programmes
Zoos select breding partners
Inter zoo exchange for breeding to prevent inbreeding
Problems with captive breeding
small population
Small gene population\
Low gentic diversity
inbreeding
Why might a zoo create a captive breeding breeding
Population of organism falling
Breeding programme will increase numbers
Enable reintroduction
Why is reservation better than the CB
Less discromfort for animals
More likley to breed in a natural environment
Natural interspecifc relationships to exist
No problems when reintroduced back into the wild
