Test 5 Material

Study of relationships between organisms and their environments that determine distribution and abundance

Behavioral Physiological/Chemical Evolutionary Conservation Theoretical

An organization level

Biosphere - Biome- Ecosystem- Community- Population- Individual

Organisms the use photosynthesis

Feeding levels Producers are the largest amount Primary consumers are herbivores

~90%

Dry weight of an organism/organic matter at a trophic level.

Can follow the flow of energy in an ecosystem by looking at the interrelationship of the organisms

Removing predators Pesticides effecting water Biomagnification

When one organism captures/kills and eats another

+- When one organism lives off another for nourishment Parasites benefits, host is harmed Often associated with disease

+0 When one organisms benefits from another but has no measurable affect on it

++ When organisms live in close association with each other and both benefit Happens only because both individuals benefit

Total range of conditions in which an organism survives and replaces itself, it’s role in the community

Full potential niche of a species

Portion of the fundamental niche that is actually filled Due to abiotic conditions, competition, or other species interactions

Top down approach Top Consumer has a positive relationship with producer Example Wolves in Yellow Stone

Physical interaction Ex: Wolves fighting to see who gets more food

Competing for same resources, no direct contact Ex: Owl and Hawks both hunting mice

Between same species

Between different species

Two organisms will be in competition with each other when they occupy the same niche at the same time in the same place

Niche partitioning or Extirpation