Ecosystems Chapter 20 Flashcards
(25 cards)
What is largest ecosystem?
biosphere
Define biotic
living (all organisms; plants, animals)
Define abiotic
non-living (sunlight, wind, soil type)
Natural disturbance examples are?
fires,floods,avalanches,rockslides
Human caused disturbances examples?
pollution
acid rain
deforestation
overfishing
oil
What’s is equilibrium?
a dynamic state of an ecosystem in which, biodiversity remains somewhat constant
What is resistance?
ability of an ecosystem to remain at equilibrium in spite of disturbances
What is resilience?
the speed at which an ecosystem recovers equilibrium after being disturbed
What are the 4 trophies levels
producers (plants)
primary consumers (herbivores)
secondary consumer (carnivores)
tertiary consumers (carnivores that eat secondary consumers)
Where does lowest trophic level get energy from?
sun
What do omnivores eat? Examples?
plants and animals (ex. racoons,bears, humans)
The environment is the sum of __________________________?
How much energy flows to the next tropic level? What is the energy lost as?
10%
energy is lost as heat
The final link in the food chain is the _______________. What do they do?
Concentration of some toxic substances as you go up the trophic levels is called
what?
toxic substances will increase as you go up the trophic levels.
The elements needed for living organisms are recycled between living organisms and
their non-living environment. These cycle are?
Biogeochemical Cycles
Why is it cooler in winter in the North?
Sun angle indirect in winter in North
Why is it warmer in summer in the North?
Sun angle more direct in summer in North
Is biome wet or dry?
both wet and dry
Is the biome cold or hot?
both
Aquatic /Marine environments represent what amount of the earth’s biosphere?
Represent the largest portion of earth’s biosphere
Which term describes the process whereby toxic substances increase as you go up trophic levels?
a. Biogeoification
b. Biomagnification
c. Bioentropy
d. Heterotrophy
b. Biomagnification
The majority of the water on Earth is found as:
a. Ice
b. Water vapor
c. Freshwater
d. Saltwater
d. Saltwater
Humans are:
a. Omnivores
b. Herbivores
c. Carnivores
d. None of these
a. Omnivores
