Transcript Ecosystem Recycling - Mrs. Reid's Webpage
POP QUIZ From Last class:
Answer questions on a separate sheet of paper! Hand IN 1. Your house is an example of a(n) ___.
a. biotic factor b. habitat c. niche 2. Trees, mosses and shrubs are all examples of what type of factor?
a. abiotic b. biotic c. commensalism 3. The study of interactions between organisms and their environments is called ?
a. botany b. cytology c. ecology 4. If you work at McDonald’s, that is an example of your?
a. habitat b. niche c. community 5. A group of deer that live in a forest is an example of a?
a. biosphere b. community c. population
Ecosystem Recycling
HEADINGS VOCABULARY IMPORTANT INFO
ENERGY FLOWS THROUGH ECOSYSTEM
WATER—NITROGEN—CARBON—PHOSPHORUS
RECYCLED!!!
ARE THEY MOVE THRU A
BIOGEOCHEMICAL CYCLE
: ABIOTIC (non-living) PORTION OF ENVIRONMENT (ATMOSPHERE) LIVING THINGS THEN BACK AGAIN
Water Cycle
CELLS CONTAIN
70-90
% H20 VERY LITTLE OF EARTHS
AVAILABLE
H20 IS IN LIVING THINGS RIVERS / LAKES / STREAMS / OCEANS CONTAIN A BIG % ATMOSPHERE CONTAIN WATER =
WATER VAPOR GROUND WATER
= IN SOIL OR UNDERGROUND IN POROUS ROCK
WATER CYCLE
OF H20 B/T RESERVOIRS EVAPORATION = MOVEMENT TRANSPIRATION PRECIPITATION
Evaporation
ADDS H20
VAPOR
ATMOSPHERE TO
HEAT
CAUSES WATER TO EVAPORATE
90%
OF EVAPORATED WATER FROM
TERRESTRIAL
ECOSYSTEM PASSES THROUGH PLANTS IN A PROCESS CALLED…
Transpiration
PLANTS TAKE IN H20
THRU ROOTS
RELEASE WATER & TAKE IN
CO2
(CARBON DIOXIDE) ANIMALS DRINK/ EAT TO TAKE IN H20 ANIMALS RELEASE IT WHEN:
BREATHING SWEATING EXCRETION
Precipitation
WATER LEAVES ATMOSPHERE TEMP & AIR PRESSURE (
ABIOTIC FACTORS
) DETERMINE HOW MUCH WATER CAN BE HELD ONCE ATM. IS SATURATED W/VAPOR =
SNOW, RAIN, SLEET, HAIL OR FOG
Carbon Cycle
PHOTOSYNTHESIS + CELLULAR RESPIRATION PHOTOSYNTHESIS
AUTOTROPHS
= PLANTS & OTHER USE:
CO2 + H20 & SUNLIGHT
= CARBOHYDRATES
CELLULAR RESPIRATION
PROCESS IN WHICH AUTOTROPHS & HETEROTROPHS USE OXYGEN (O2) TO
BREAKDOWN CARBS .
CELLS MAKE DOWN
ORGANIC ATP
(ENERGY) BY BREAKING
COMPOUNDS
A COMPOUND THAT RESULTS FROM LIVING THINGS & CONTAINS
CARBON
HUMAN INFLUENCE ON THE CARBON CYCLE
IN THE PAST 150 YEARS CO2 IN THE ATMOSPHERE HAS
RISEN 30%
ALMOST ½ IN THE LAST 40 YEARS DUE TO HUMANS ACTIVITY BURNING
FOSSIL FUEL :
REMAINS OF ORGANISMS THAT HAVE BEEN TRANSFORMED BY
DECAY, HEAT, & PRESSURE
ENERGY RICH ORGANIC MOLECULES
BURNING RELEASES
ENERGY & CO2
BURNING VEGETATION RELEASES CO2 TROPICAL RAINFOREST DESTRUCTION WITH NO PLANTS CO2 IS NOT ABSORBED
Nitrogen Cycle
NITROGEN IS NEEDED TO MAKE PROTEINS &
NUCLEIC ACIDS:
ORGANIC MOLECULE,
DNA
OR
RNA
, THAT STORES & CARRIES IMPORTANT INFO FOR CELL FUNCTION N2 (NITROGEN GAS) MAKES UP
78%
OF THE
ATMOSPHERE
N2 IS HOWEVER LIMITED TO
AMMONIA
THINGS FOR MOST LIVING
NITROGEN FIXATION
CONVERSION OF N2 TO AMMONIA CERTAIN BACTERIA CAN CONVERT
NITROGEN FIXING BACTERIA NH3
= LIVE IN
SOIL
& IN SOME
ROOTS
Recycling Nitrogen
BODIES OF DEAD ORGANISMS CONTAIN “N” URINE & DUNG ALSO
DECOMPOSERS
WASTE OF ORGANISMS GIVE OFF NITROGEN AS AMMONIA = BREAK DOWN CORPSES &
AMMONIFICATION NITRIFICATION
= BACTERIA IN SOIL TAKE IN AMMONIA & OXIDIZE IT INTO NITR
ITES
, NO2 & NITR
ATES
, NO3 Back into the environment
DENITRIFICATION
RETURNING NITROGEN TO
ATMOSPHERE
PLANTS CAN ABSORB NITRATES & AMMONIA FROM SOIL ANIMALS CAN
NOT !
ANIMALS OBTAIN IT BY EATING OTHER ORGANISMS THEY
DIGEST
THE
PROTEINS
&
NUCLEIC ACIDS
SUMMARY
1. WHAT IS THE BIOGEOCHEMICAL CYCLE 2. WHERE DO NITROGEN-FIXING BACTERIA LIVE? WHAT CRUCIAL FUNCTION DO THEY PERFORM?
3. DESCRIBE THE ROLE OF DECOMPOSERS IN NITROGEN CYCLE?
4. HOW HAS BURNING FOSSIL FUELS AFFECTED CARBON CYCLE?
5. THROUGH WHAT PROCESS DOES MOST H20 VAPOR ENTER ATM.