Introduction Flashcards
what is an ecosystem
biological community plus all of the abiotic factors influencing that community
what are the 3 biotic components of an ecosystem
primary producers (autotrophs)
consumers (heterotrophs)
decomposers (heterotrophs)
define and describe autotrophs
manufacture organic (carbon) requirements from inorganic sources
- photosynth
exception to autotrophs
not all plants are auto
ex. corpse plan parasitizes other plants
describe and define heterotrophs
obtain organic requirements from other organisms + the environment
primary (herbivores), 2ndary, teritiary consumers
- decomposers
chemosysthesis?
use chemical energy to synthesize organic compounds `
abiotic components of the ecosystem? (4)
- substrate/matrix (soil, PM)
- solar or other energy source
- chemicals/compounds/minerals (contained in soil, air, water)
- climate
define photosynthesis
conversion of light energy into chemical energy
respiration
the release of carbon
translocation define
nutrients, water, and carbs moved in a plant
decomposition?
breaking down OM
other 3 components
trophic level relationships
biogeochemical cycling
energy flow
peruvian anchovy model ex?
l Nino warmed water and lowered fish productivity. El Nino occurs when movement of air
heats up the water in direction EàW (inward) (usually WàE) therefore pooling nutrients by the
shore blocking upwelling thus causing a decreases in nutrients thus a decrease in anchovies.
Natural upwellings are why primary producers do so well thus driven by a bottom-up approach
describe upwelling
OM die àsink àupwelling àfertilizer for photosynthesizes
define ecosystem ecology. what does it focus on?
study of the interactions between organisms and their environment as an
integrated system. Addresses interactions that link biotic systems with
abiotic systems. Focuses on the flow of energy and materials (C, N, H2O,
pesticides) within an ecosystem
