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27 Cards in this Set

  • Front
  • Back
How has urban development affected the Great Lakes?
toxic pollution, animals being killed, many spills that cause destruction
what is ecology?
the study of how organisms interact with one another.
what is an ecosystem?
all of the interacting parts of a biological community and it's physical environment within a given area.
what is a producer?
an organism capable of making their own food from water, light and air. (tree)
what is the difference between a herbivore, carnivore and omnivore?
herbivore: eats 90% fresh plants
carnivore: eats 90% fresh meat
omnivore: eats a mixture of fresh meat and plants
What is the difference between abiotic and biotic factors?
abiotic factors are part of the environment that was never living and biotic factors are part that is or was living.
What is biodiversity?
Biodiversity is the existence of a wide variety of plant and animal species in their natural environments, which is the aim of conservationists concerned about the indiscriminate destruction of rainforests and other habitats
Niche
everything an organism does to stay alive and reproduce
What is the difference between a food web and a food chain?
A food chain is a single strand of different energy transfers while a food web shows the whole ecosystem (eg. a forest)
What is a decomposer?
an animal that feeds on detritus. (waste from plants and animals, including dead animals)
What are the different Trophic levels?
primary producers, herbivores, carnivores, omnivores, decomposers
What is an ecotone?
An ecotone is an area between two ecosystems
What is Bioacculmulation?
refers to the amount of substances accumulated in a speices body, these include pesticides and other chemicals
Bioamplification
the increase in concentration of a substance that occurs in a food chain as consequence of: persistance (can't be broken down by environmental process), low rate of internal degradation and low rate of excretion of the substance.
Why does bioamplification occur?
consumers ingest toxic prey, then the concentration of the pesticide increases the higher up the food chain/ trophic levels
What is an example of bioamplification?
the DDT outbreak
Definition of population
all the members of a species living in one area.
Definition of a habitat
where an organism lives in it's environment.
What is a pesticide?
Chemicals designed and used to kill "pests". These chemicals are hard to get rid of and cycle through the ecosystems.
What are examples of pesticides?
insectiscides- insects
herbicides- weeds
fungicides- moulds and mildew
bactericides- bacteria
Why do we use pesticides?
protects crops from insects, weeds and moulds. prevents disease eg. west nile virus and malaria. cosmetic reasons eg. lawns and golf courses
What is Photosynthesis?
the process carried out by plants and aglae to use the energy of sunlight to convert carbon dioxide and water into sugar and oxygen.
What is the formula for Photosynthesis?
carbon dioxide + water
yeilds
sugar and oxygen
C6H12O6 + H20
yeilds
C6H12O6 + O2
What is cellular respiration?
most living things use oxygen to break down sugar as a source of engergy
What is the formula for cellular respiration?
sugar + oxygen
yeilds
carbon dioxide + water
C6H1202 + 02
yeilds
CO2 +H20
Name an exotic species
flowering rush
How did flowering rush affect the ecosystem?
eats and kills all plants around it. takes over the environment so that nothing else can live around it.