What need to find and eat food? Heterotrophs - Consumers Carnivore Herbivore Omnivore Decomposers Scavengers
Carnivore, Herbivore, Omnivore Eats only meat Eats only plants Eats meat and plants What do each of these consumers eat?
DECOMPOSERS (Mushrooms, Worms, Bacteria) What digests and absorbs nutrients from breaking down dead and decaying organisms?
Scavengers Vultures & Hyenas We really need to thank the lions for killing our meal!
THE SUN!!!! What provides almost all the energy in ecosystems?
What is this structure called? Energy Pyramid Name and describe each trophic level. See labels How much energy is transferred from lower level to next? 10% Carnivores (eat Herbivores) & Omnivores Carnivores & Omnivores
Food Chain Linear Loss of one organism disrupts the chain
Food Web Arrows show the transfer of energy from one organism to another. Arrow points to mouth that does the eating. One loss of organism does not disrupt the entire web. A ______ ____ is an ecological model of the relationships of complex interactions among organisms in a community.
Biotic factor means… Living factors that affect the environment or a population. Examples: disease, predators, prey Abiotic factor means… Non-living factors that affect the environment or a population. Examples: wind, hurricane, tornado, flood
A factor caused by human actions such as pollution, all trees cut down, global warming, making a park, or over hunting that affect the environment or a population.
__Competition______ is the term used for organisms fighting for the same resources (food, shelter, mates) in an area.
Niche is your habitat plus your role in it (a relationship) Mother/Child or Predator/Prey
SYMBIOSIS is the term for organisms depending on each other
Mutualism is when both organisms help each other (+/+) Ex: Bee & Flower Lichen (algae/fungus) Shark & Remora Fish
Commensalism is when one organism gets helped and the other not affected (harmed or helped) (+/0) Ex: Bird nest/Tree Barnacle/Whale
Parasitism is when one benefits (parasite) and one is harmed (host) but not necessarily killed (+/-) Ex: Tick (parasite)/Dog(host) Mistletoe(parasite)/Deciduous Tree(host)
What is Predator/Prey Predator (lynx that kills and eats) vs. Prey (rabbit that gets killed) (+/-) “Predation”
Primary Succession: is when the area did not have any growth, begins with rocks/lava and slowly began with small plants, and eventually became a forest.
Secondary Succession is when there was a forest and a fire or other disaster killed most but not all plants and then it re- grows into a forest again.
A B C D Which type of vegetation represents a climax community? Largest Mature Trees
Be able to: Explain what carrying capacity is Determine the carrying capacity of population Explain what factors (biotic, abiotic, human) cause increases and decreases in a population When population graph is … ↗ Births > Deaths (resources are plenty, predators decreased, etc.) ↘ Births < Deaths (resources are low; predators increasing, etc.) → Level: Births = Deaths (resources are right for number of organisms) Dotted line is the carrying capacity (amount of organisms the area can support)