ecosystems
Define habitat
the place within an ecosystem where an organism lives.
What is genetic depletion?
Loss of species containing potentially useful genes.
What is one cause for deforestation?
To Clear land for farming/roads/need for timber.
What is forests role in the water cycle ?
Transpiration
What is random sampling ?
What is a niche?
The role of species within the ecosystem
What is one thing wetlands are useful for?
Shoreline protection/maintenance of water quality/ flood control etc.
Name of impact of deforestation
Soil erosion or desertification.
What does transpiration cause in the near by area ?
Droughts.
What is a quadrat?
A frame of known area placed on a part of the site to be sampled.
The measure of how damp air is.
What is one reason for draining a wetland?
Agriculture/flood protection/discharge of pollutants etc.
What process do trees prevent from happening and how?
forests prevent soil erosion through protecting the ground from heavy rainfall.
How do forests affect rainfall?
By creating moisture in the atmosphere.
What is a quadrant used to sample?
Sedentary organisms e.g plants/ the number of organisms of the species counted.
Name 2 biotic factors in an ecosystem
Producers/primary consumers/secondary consumers etc.
Name 3 causes of habitat loss
The drainage of wetlands, intensive agricultural practices and deforestation.
How is habitat loss connected to deforestation?
Huge volumes of trees act as massive carbon stores thats also home for rare species.
What is ecotourism And what is on e benefit from it?
Responsible travel to a natural area that promotes conservation of the environment. This can be used to make money by the locals helping the local economy.
What is a transect?
A sampling method in which sampling devices are laid out along a line along a line already placed across an area.
Describe the process of photosynthesis
Plants trap light energy with the help of chlorophyll, this green pigment splits water into hydrogen and oxygen. The hydrogen is then added to Co2 to make glucose and the oxygen that isn’t used for respiration is given off to the atmosphere.
Name 2 examples of intensive agricultural practices
Wetland drainage, over-cultivation of soil.
Which 2 greenhouse gases are released as a side effect of deforestation?
CO2 and methane
What is a Carbon sink?
A vegetated area where the intake of CO2 from the atmosphere in photosynthesis exceeds it’s output from respiration so the net flow of carbon is from the atmosphere into the plants.
Name 2 possible examples of sustainable forestry
Selective logging/ agroforestry/alley cropping