Bio 10.3 Human effects on ecosystems
- Created by: therossmoss
- Created on: 04-11-16 14:19
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- Human Effects on Ecosystems
- Climate change
- Increase in number/ frequency of extreme weather events all over the world
- Greenhouse effect
- GHG maintain temperature at Earth's surface
- Absorb radiation and reradiate it back
- Evidence
- Temperature proxies
- Ice core
- Tree rings
- Corals
- Peat bog data
- Using several proxies give scientists data reference points which determine the accuracy of estimations of age
- Temperature proxies
- Impacts
- Change in rainfall patterns
- Risk of flooding
- increase in insect-borne diseases
- Seasonal cycles change affecting life cycles
- Loss of biodiversity
- Causes
- Eating of animals & plants
- Habitat destruction
- Pollution of seas/oceans
- Introduction of new species + diseases by people
- CITES (Convention on International Trade in Endangered species of Wild Fauna + Flora)
- Successes
- Banned ivory trade in 1989
- 5 protected species of sharks&rays
- 7 turtle species brought back from brink of extinction
- Limitations
- Strong commercial interests can override scientific evidence
- Not all countries have signed up
- Deals exclusively with trade agreements
- No legal obligation
- Successes
- Causes
- Burden of proof
- Research
- Publication of findings
- Peer review
- Techniques tried out
- Methodology questioned
- Evaluation of data & conclusions
- Precision & accuracy questioned
- Publication in scientific journal
- Precision & accuracy questioned
- Precision & accuracy questioned
- Publication in scientific journal
- Evaluation of data & conclusions
- Methodology questioned
- Scientific conferences
- Methodology questioned
- Evaluation of data & conclusions
- Evaluation of data & conclusions
- Methodology questioned
- Techniques tried out
- Peer review
- Publication of findings
- Research
- Depletion of resources
- Farming
- Natural cycles broken
- Monocultures absorb large quantities of particular minerals
- Artificial fertilisers
- Don't support structure of soil
- Soil biodiversity lost
- Fishing
- Harvesting of fish & aquatic organisms
- Provides food & employment
- Causes of decline
- Large global fishing fleets
- Open-ocean factory ships
- Damaging fishing techniques
- Nets with small net sizes
- fishing during breeding seasons
- Conservation
- Controllng mesh size
- Banning fishing during breeding season
- Strict quotas on fishing fleets
- Encouraging use of less damaging methods
- Harvesting of fish & aquatic organisms
- Farming
- Climate change
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