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.