1-144 of 144
Produce clones of T-killer cells if they meet a pathogen again
T-memory cells
Free living nitrogen- fixing bacteria in soil
Antibacterial
,Preserve the environment
Ensure resources are available for future generations
Allow humans to live comfortably
Enable less developed countries to develop through exploiting natural resources
Create more balance between countries
Aims of sustainability
A few individuals form a new colony, isolated from the original, reducing the gene pool
Founder effect
Kenya
National reserve
Actively managed
Savannah
Mara river
Fertile regions close to river
Annual zebra and wildebeest migrations
In the past the region was dominated by the acacia bush. However this is a habitat for the
tsetse fly that is a vector for disease so lots of acacia has been cleared.
, Masai Mara ecosystem
Some biomass is indigestible (cellulose and lignin)
Some energy is lost as heat or via excretion
Why is not all energy transferred from one tropic level to the next?
In anaerobic conditions
Bacteria use nitrates as energy for respiration and convert them baby into nitrogen
Denitrification
Maintenance of biodiversity through human action or management
Conservation
, Before whaling trade the islands were hardly visited
After this whalers distrusted the ecosystem by allowing domestic animals to run loose,
chopping down forests for fires and removing thousands of giant tortoises whose meat
would sustain the whalers on their voyages.
Galapagos National Park has been established
Introduction of park rangers
Limiting human access
Controlling migration to/from islands
Strict controls over movements of introduced animals like pigs
Galápagos Islands- control of human activities
decomposers
Digest externally by secreting enzymes
Saprotrophs
Animals- endothermic animals rely on thick layers of blubber for insulation
Antarctica ecosystem
Produce clones of T-killer cells if they meet a pathogen again
T-memory cells
Free living nitrogen- fixing bacteria in soil
Antibacterial
,Preserve the environment
Ensure resources are available for future generations
Allow humans to live comfortably
Enable less developed countries to develop through exploiting natural resources
Create more balance between countries
Aims of sustainability
A few individuals form a new colony, isolated from the original, reducing the gene pool
Founder effect
Kenya
National reserve
Actively managed
Savannah
Mara river
Fertile regions close to river
Annual zebra and wildebeest migrations
In the past the region was dominated by the acacia bush. However this is a habitat for the
tsetse fly that is a vector for disease so lots of acacia has been cleared.
, Masai Mara ecosystem
Some biomass is indigestible (cellulose and lignin)
Some energy is lost as heat or via excretion
Why is not all energy transferred from one tropic level to the next?
In anaerobic conditions
Bacteria use nitrates as energy for respiration and convert them baby into nitrogen
Denitrification
Maintenance of biodiversity through human action or management
Conservation
, Before whaling trade the islands were hardly visited
After this whalers distrusted the ecosystem by allowing domestic animals to run loose,
chopping down forests for fires and removing thousands of giant tortoises whose meat
would sustain the whalers on their voyages.
Galapagos National Park has been established
Introduction of park rangers
Limiting human access
Controlling migration to/from islands
Strict controls over movements of introduced animals like pigs
Galápagos Islands- control of human activities
decomposers
Digest externally by secreting enzymes
Saprotrophs
Animals- endothermic animals rely on thick layers of blubber for insulation
Antarctica ecosystem
