Chapter 2 ecology

Photosynthetic autotrophs remove what from the atmosphere

Nitrogen is a limiting factor because

Heterotroph that decomposes organic material and returns it to the soil, air or water.

Large group of ecosystems that share the same climate and have similar communities

Each step in a food chain or food web.

Total mass of living matter at each trophic level.

Which weakness does a food web have when applied to ecological problems

Shows a single path for energy flow through an ecosystem.

Which biogeochemical cycle affects humans

The biogeochemical cycle least dependent on biotic processes

Which is an organism's niche but not it's habitat

Biological community and all the nonliving factors that affect it

If there are 10,000 k/cal of energy at the producer level how much energy is lost at the 4th

Group of organisms of the same species that occupy the same area

Act of one organism feeding on another organism

Physical area in which an organism lives

Symbiotic relationship in which one organism benefits and the other is unaffected

Which allows the flow of energy through an ecosystem

Plant in plastic bag placed in sunlight for one hour. What happens to the oxygen level

Nitrogen and carbon are released back into the soil by

Where would you find autotrophs that use chemical compounds for energy

All the interacting populations of a different species that live in the same geographic area

Scientific study of all the interrelationships between organisms and their environment

Specie most represented in a food chain

Shows many connected food chains.

Organisms that make their own food.

Which process describes nitrogen fixation

Deep ocean vents, African wildlife, and glaciers are part of the

Symbiotic relationship in which one organism benefits and the other harmed

Any living factor in an organism's environment

What is the relationship between nitogen-fixing bacteria and host plants

Organism that cannot make its own food.