definitions
Means of production
ecosystems
food webs
miscellaneous
100
all the interconnected feeding relationships in an ecosystem
What is a food web
100
producer is to autotroph as consumer is to __________
What is heterotroph
100
organisms within an ecosystem are ________ factors in that ecosystem
What is biotic
100
when an ecologist maps a food web of an aquatic ecosystem, he/she is using which ecological method?
What is modeling
100
the ultimate source of energy for most ecosystems
What is sunlight
200
the lowest level of environmental complexity that includes both living and nonliving factors
What is ecosystem
200
most primary producers use _______ to make __________
What is light energy; carbohydrates (food)
200
Which of the following are not examples of abiotic factors: water, seeds, soil, sand.
What are seeds.
200
food webs only include __________ factors
What is biotic
200
ecological method that involves using a control group
What is experimentation
300
animals that get energy by eating the carcasses of other animals that have been killed by predators or have died of natural causes
What are scavengers
300
producers release _________ into the atmosphere during photosynthesis
What is oxygen
300
in a four level energy pyramid, if the first level contains 3000 calories, the third level will contain _____________ calories
What is 30
300
organisms on the second trophic level of the food web, who only eat primary producers, are referred to as ________ _______ (2 words)
What is primary consumers
300
the difference between how energy and nutrients flow
What is energy flows one way; nutrients flow in a cycle
400
organisms that break down organic matter and return it to the environment
What are decomposers
400
Algae grows excessively if exposed to large amounts of nitrogen because nitrogen is a _______________
What is limiting nutrient.
400
open oceans generally have less producer biomass because of a limited amount of....
What is nutrients.
400
A lizard who preys on insects would be referred to as a ________ and a _________ because he cannot make his own food.
What is carnivore; consumer or heterotroph
400
precipitation that is not taken up by living organisms and does not evaporate can seep into the soil to become _________
What is groundwater.
500
the total amount of living tissue within a given trophic level
What is biomass
500
Unlike photosynthesis, chemosynthesis uses chemical energy and does not release _____________
What is oxygen
500
What are the 3 levels of organization smaller than an ecosystem?
What is individual (species), population, community.
500
food webs often don't include _______ which recycle _______ in order for primary producers to grow
What is decomposers; nutrients
500
chemsynthetic producers use the energy stored in this chemical to make carbohydrates
What is sulfide or hydrogen sulfide
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