Download 1/ Biodiversity and factors affecting it. a/ Human factors

1/ Biodiversity and factors affecting it.
a/ Human factors
- Intensive farming (incl. monoculture and GMs)
Special area of focus:
- Why is intensive farming needed? - p189
- What is monoculture (pros/cons)? - p189-190
- Leaching of fertilisers in water ways - p191
- Bioaccumulation – p193
- Biological control – p197-198
- Use of GMs – p190-191
- Air pollution
Special area of focus: Lichens as indicator organisms – p144-194
- Organic pollution of water ways:
Special area of focus: Indicator species to monitor pollution – p196
- Habitat loss due to
- Deforestation p145
- Desertification p145-146
- Overfishing
- Invasive non-native species
b/ Abiotic factors (i.e. non-living influences on an ecosystem) p173
- Temperature (air/soil/water)
- How to measure it
- Impact of water temperature on the distribution of fish in aquatic ecosystems
p148-149
- Light intensity
- How to measure it
- Impact of light intensity on the distribution of plants in ecosystems- p174
- pH (air/soil/water)
- How to measure it
- Impact of water pH on the distribution of fish in aquatic ecosystems- p148-149
- Moisture levels (soil/air)
- How to measure it
- Impact of air/soil moisture on the distribution of organisms.
c/ Biotic factors (i.e. living influences on an ecosystem). P166-170
In order to study biotic factors, plants and animals living in an ecosystem must be sampled
using techniques such as pitfall traps, quadrats etc…. They must then be identified
(Using and constructing paired-statement keys p171- 172) and their abundance determined.
- Incidence of disease - Competition: intra-specific/inter-specific p162-163
- Predation: Special areas of focus: - predator/prey relationship- p147
- Grazing (special area of focus- impact of grazing on the distribution of plant species - p147)
2/ The distribution of life
- Area of focus: Building a food webs / Pyramids – 158-159
- Niches (p154-155) and Biomes (p149-151)
3/ Energy and nutrients in an ecosystem:
a/ Energy flow in food chain p157
b/ Nitrogen cycle (p160-161)
4/ Adaptation, selection and the evolution of species. P176-188
1/ Biodiversity and factors affecting it.
a/ Human factors
- Intensive farming (incl. monoculture and GMs)
Special area of focus:
- Why is intensive farming needed? - p189
- What is monoculture (pros/cons)? - p189-190
- Leaching of fertilisers in water ways - p191
- Bioaccumulation – p193
- Biological control – p197-198
- Use of GMs – p190-191
- Air pollution
Special area of focus: Lichens as indicator organisms – p144-194
- Organic pollution of water ways:
Special area of focus: Indicator species to monitor pollution – p196
- Habitat loss due to
- Deforestation p145
- Desertification p145-146
- Overfishing
- Invasive non-native species
b/ Abiotic factors (i.e. non-living influences on an ecosystem) p173
- Temperature (air/soil/water)
- How to measure it
- Impact of water temperature on the distribution of fish in aquatic ecosystems
p148- 149
- Light intensity
- How to measure it
- Impact of light intensity on the distribution of plants in ecosystems- p174
- pH (air/soil/water)
- How to measure it
- Impact of water pH on the distribution of fish in aquatic ecosystems- p148-149
- Moisture levels (soil/air)
- How to measure it
- Impact of air/soil moisture on the distribution of organisms.
c/ Biotic factors (i.e. living influences on an ecosystem). P166-170
In order to study biotic factors, plants and animals living in an ecosystem must be sampled
using techniques such as pitfall traps, quadrats etc…. They must then be identified
(Using and constructing paired-statement keys p171- 172) and their abundance determined.
- Incidence of disease - Competition: intra-specific/inter-specific p162-163
- Predation: Special areas of focus: - predator/prey relationship- p147
- Grazing (special area of focus- impact of grazing on the distribution of plant species - p147)
2/ The distribution of life
- Area of focus: Building a food webs / Pyramids – 158-159
- Niches (p154-155) and Biomes (p149-151)
3/ Energy and nutrients in an ecosystem:
a/ Energy flow in food chain p157
b/ Nitrogen cycle (p160-161)
4/ Adaptation, selection and the evolution of species. P176-188