Unit 1 - Species fluctulation - (Week 7) Flashcards
(14 cards)
What is habitat fragmentation
When a habitat is broken up into smalled fragments
What can habitat fragmentation result in?
Can lower species, genetic and ecosytem diversity
What is a keystone species?
A species on which other species in an ecosystem largely depends.
Rewilding: Erosion control - What does it do?
Prevents the movement of soil or rick, vegetation. E.g trees may be plated to stabalise soil
Rewilding: Reforestation - What does it do?
Planting trees in areas where others have been cut down to create habitats and increased biodiversity
Rewilding: Reintroduction of species - What does it do?
Nationally extict keystone species (wolves) could be reintroduced to reduce deer numbers and help habitat regeneration
Rewilding: Habitat Corridors - What does it do?
Areas of natural habitat which link fragments allowing species to feed, mate and recolonise habitats after local extinctions
Rewilding: Removing Invasive Species - What does it do?
Removed to prevent them outcompeting and elimanating native species
What are the enviromental impacts of an Invasive non-native species (INNS)
They can disrupt habitats and ecosystems, preying on or out-compete native species, spread disease and interfere with genetic integrity
What is overexpolitation?
When resources are harvested (consumed) at a rate greater than they can be replayed.
What is point pollution
When the source is discharged from a single location e.g pipe
What is diffuse pollution?
No specific point of discharge - a result of activities spread across large areas
What is a plagioclimax Community
An alternative climax community which occurs when human influance has prevented progression to the natural climax community
