ECOSYSTEMS AND BIODIVERSITY Flashcards
WHAT IS A HABITAT
THE PLACE WHERE AN ORGANISM LIVES
WHAT IS A POPULATION
ALL THE ORGANISMS OF ONE SPECIES IN A HABITAT
WHAT IS A COMMUNITY
ALL THE DIFFERENT SPECIES IN A HABITAT
WHAT IS AN ECOSYSTEM
ALL THE ORGANISMS LIVING IN A PARTICULAR AREA AND ALL THE NON-LIVING CONDITIONS
BIODIVERSITY IS ALL ABOUT THE (…)
VARIETY OF LIFE IN AN AREA
FANCY DEFINITION OF BIODIVERSITY
BIODIVERSITY IS THE VARIETY OF DIFFERENT SPECIES OF ORGANISMS ON EARTH, OR WITHIN AN ECOSYSTEM
WHAT IS HIGH BIODIVERSITY AND WHY IS IT IMPORTANT
IT MAKES SURE THAT ECOSYSTEMS ARE STABLE BECAUSE DIFFERENT SPECIES DEPEND ON EACH OTHER FOR THINGS LIKE SHELTER AND FOOD, AND DIFFERENT SPECIES CAN ALSO HELP TO MAINTAIN THE RIGHT PHYSICAL ENVIRONMENT FOR EACH OTHER
ENVIRONMENTAL CHANGES AFFECT (…)
COMMUNITIES IN DIFFERENT WAYS
WHAT DOES ABIOTIC MEAN
NON-LIVING
WHAT DOES BIOTIC MEANS
LIVING
THE ENVIRONMENT IN WHICH PLANTS AND ANIMALS LIVE CHANGES ALL THE TIME, THIS CHANGES ARE CUAUSED BY (…)
ABIOTIC (NON-LIVING) AND BIOTIC (LIVING) FACTORS AND AFFECT COMMUNITIES IN DIFFERENT WAYS
WHAT ARE THE DIFFERENT THINGS THAT CAN HAPPEN WHEN ENVIRONMENTAL CHANGES AFFECT COMMUNITIES
FOR SOME SPECIES POPULATION SIZE MAY INCREASE, FOR OTHERS IT MAY DECREASE, OR THE DISTRIBUTION OF POPULATIONS MAY CHANGE
WHAT ARE THE ABIOTIC FACTORS THAT AFFECT COMMUNITIES
1) ENVIRONMENTAL CONDITIONS- EG: THE DISTRIBUTION OF BIRD SPECIES IN GERMANY APPEARS TO BE CHANGING BECAUSE OF A RISE IN AVERAGE TEMPERATURE (LIGHT INTENSITY, MOISTURE LEVEL AND SOIL PH) ALSO AFFECT THE ABUNDANCE AND DISTRIBUTION OF ORGANISMS
2) TOXIC CHEMICALS- EG CHEMICAL PESTICIDES OR FERTILISERS, PESTICIDES CAN BUILD UP IN FOOD CHAINS THROUGH BIOACCUMULATIONSO ORGANISMS AT THE TOP OF THE CHAIN RECEIVE A TOXIC DOSE
WHAT ARE BIOTIC FACTORS THAT AFFECT COMMUNITIES
1) AVAILABILITY OF FOOD- EG: IN A BUMPER YEAR FOR BERRIES, THE POPULATION OF BLACKBIRDS MIGHT INCREASE BECAUSE THERE WILL BE ENOUGH FOOD FOR ALL OF THEM SO THEY ARE MORE LIKE TO REPRODUCE AND SURVIVE.
2) NUMBER OF PREDATORS- EG: IF THE NUMBER OF LIONS (PREDATOR) DECREASES THEN THE NUMBER OF GAZELLES (PREY) MIGHT INCREASE BECAUSE FEWER OF THEM WILL BE EATEN BY LIONS
3) COMPETITION- ORGANISMS COMPETE WITH OTHER SPECIES FOR THE SAME RESOURCES, EG: PLANTS NEED THINGS LIKE LIGHT, SPACE, WATER AND MINERALS FROM THE SOIL AND ANIMALS COMPETE FOR THINGS LIKE TERRITORY, SHELTER, FOOD, WATER AND MATES