Flashcards in Chapter 4- Ecology And Ecosystems- Communities And Eco-systems Deck (42)
Environment in which species lives in
Group of organisms of the same species who live in the same area at the same time
Group of populations living and interacting in the same area
Community and its abiotic environment
Study of relationships between living organisms and between organisms and their environment
Define an autotroph
Organism that synthesis it's organic molecules from simple inorganic substances (e.g CO2 and nitrates)
What are autotrophs?
Define a heterotroph
Obtains organic molecules from other organisms
What are heterotrophs?
They are consumers
Define a consumer
Organism which ingests other organic matter that is living or recently killed
Organisms that ingests non-living organic matter
Organisms that lives in or eats non living organic matter, secreting digestive enzymes into it and absorbing the products of digestion
What do food chains show?
Food chains show linear feeding relationships between species
What do you arrows represent in food chains?
Arrows represent transfer of energy as one organism is eaten by another
What is the first organism in a food chain sequence and what is it followed by?
The first organism in the sequence is the producer followed by consumer
Draw three food chains including land pond and ocean
Do it Martha
What do food web show?
Food web show how food chains are linked together into more complex fitting relationships within a community
In food webs what can hold more than one trophic level
more than one producer and consumer occupy Multiple trophic positions
Define trophic level
Trophic level refers to the position it occupies in a food chain
What is trophic level one
What is trophic level two
What is trophic level three
What is trophic level four
Construct a food web containing up to 10 organisms
Fucking do it
Why is light useful for almost all communities
All green plants some bacteria= photo trophic they use light as a source of energy for synthesising organic molecules
What is light at the initial source for?
Almost all communities
How does energy enter most communities
Energy enters most communities as light its absorbed by autotrophs e.g. plants And converted into chemical and converted into energy by photosynthesis
After energy enters most communities as light how does energy then get past the primary consumer?
Energy then gets passed to the primary consumer herbivore when They eat the plant and then get past the successive consumers carnivores as they eaten in turn
How much energy is passed from one trophic level to another and where does the rest go?
Only about 10% of energy is passed from one trophic level to another the rest is lost