Species and populations 1
the environment in which a species normally lives.
What is a habitat?
A group of populations living and interacting with each other in a common habitat.
What is a community?
Solar radiation
What is the source of energy in the ecosystem?
a collection of ecosystems sharing similar climatic.
What is a biome?
The maximum number of species that can be sustainably supported by a given environment.
What is carrying capacity?
A process with inputs, outputs and transformations of energy and matter. Carbon dioxide + water transformed into glucose + oxygen
What is photosynthesis?
Some energy is absorbed by inorganic matter or reflected back into the atmosphere.
Why isn't 100% of solar energy absorbed into the ecosystem?
Aquatic, forest, grassland, tundra, desert
the particular set of abiotic and biotic conditions and resources to which an organism or population responds.
What is Niche?
A relationship between two species where one is benefited and the other is harmed.
What is parasitism?
The position that an organism occupies in a food chain, or the position of a group of organisms in a community that occupy the same position in food chains.
What is a trophic level?
Chemical energy
What is solar energy converted into by producers?
Insolation, precipitation and temperature
Which main factors governs the distribution of biomes?
A graph showing logistic population growth where the population starts growing slowly, speeds up before stabilising around teh carrying capacity of the environment.
What is a S population curve?
Physical & chemical phenomena that cause a change in a population (e.g. predators, disease, competition for food & shelter)
What are density-dependent factors that limit a populations growth?
Typically plants or algae that produce their own food using photosynthesis.
What are autotrophs?
10%
Explain the distribution of precipitation and temperature and how they influence the structure and relative productivity of different biomes.
What is the tricellular model of atmospheric circulation?
Explain what limiting factors are and their significance in humans.
environmental conditions that restrict the growth and distribution of a population within an ecosystem. Humans are not really affected by them.
a technique used to estimate the distribution and abundance of organisms in an area by randomly placing quadrats in the area being studied.
What is the Random Quadrant Sampling
Energy is transformed or transferred in a system, it cannot be created or destroyed, so creates disorder (entropy).
What is the second law of thermodynamics?
gm-2 (grams per square metre
What is the unit of measure for biomass?
At the intersection between the Hadley cell and the Ferrel cell (30degrees N & S).
Where would you find hot deserts?