How Changes Occur In Ecosystems 9 Flashcards
What’s ecological succession?
Refers to changes in the biotic chatacteristics
Where would primary succession take place?
Bare rock
Stages of succession for primary?
Wind carries spores, weathering, pioneer species alter abiotic and biotic features, animals and plants appear
What is secondary succession?
Major disturbance in an area that already had soil
Similarities and differences between primary and secondary succession
Similarities: both create mature communities, plants and animals grow
Differences: grow at different times, different features at stage 1
What is a pioneer species?
They alter abiotic and biotic environment
What is a climax community and what is another name for it?
A finished succession to can be unchanged for years but changes can still apply
Another name:
Mature community
What is a natural selection?
Process where individuals with advantages are better to reproduce and pass traits
What’s an adaptive radiation?
Describes the type of natural selection where many are different than one
How does the 13 types of finches have a different beak?
Thrive in own niche and not compete
How would a species get extinct?
Invasive species and human activity
What’s an invasive species?
Non native species that negatively impact native species
What is another name for foreign species?
Introduced species, invasive species, non native species
What is a foreign species?
A species that is introduced to a new area accidentally
What can happen when a foreign species is introduced to an ecosystem?
They can take advantage over their new habitat and compete for resources
What is a native species?
The species who originally lived in that area
Why is scotch broom so difficult to control?
When removing the whole tree the seeds remain
What are benefits of controlled burning?
Tree planting, killing diseases
What are the negative impacts of agriculture?
Air pollution, less biodiversity, and (POP)
What are the effects of deforestation?
Never replanted, reduce biodiversity, crops vulnerable to diseases
What’s habitat loss?
Use of land resources from humans
What is habitat fragmentation?
Splitting habitats to smaller ones
What is resource exploitation?
Resource use, Humans depend on it for food and shelter
What is overexploitation?
Extractions of resources until gone
