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Ecology 2

Name: __________________________
Date: ___________________________

Horizontales
____ is often the pioneer organism in an area. It is a symbolic relationship between a fungus and a photosynthetic organism.
All of the living populations that are found and interact within an ecosystem.
Ecological ____ is a predictable series of changes that occur in an area.
Organisms that break down and recycle organic material from decaying or dead organisms, example - bacteria and fungi (mushrooms).
Complex interconnections that show the feeding relationships of organisms within an ecosystem. The more connections, the more stable the ecosystem.
A model that shows the flow of energy in an ecosystem from producers to consumers. As energy flows up this model, it decreases being lost as heat.
____ plankton. Photosynthetic algae found near the surface of the ocean.
Atmospheric gases that absorb (trap) heat energy, increasing the temperature of the atmosphere.
A group of ecosystems that share similar climates and typical organisms.
____ succession happens after a disturbance such as a forest fire.
Scientific study of interactions among organism and between their environment.
Organisms that feed exclusively on other animals, example - fox.
The most biodiverse and stable stage of ecological succession is the ___ community.
Organism that obtains energy by eating both plants and animals.
Verticales
Type of plants that nitrogen-fixing bacteria on their roots. (such as peas and peanuts).
The realized role that an organism fills within an ecosystem. It defines where it fits within a food web or energy pyramid.
Process in which chemical energy is used to produce carbohydrates. Used by bacteria and organisms in harsh environments such as deep-sea volcanic vents or in hot springs.
Another name for an autotroph.
All living organisms that encompass the Earth.
Organisms that must take in preformed nutrients (organic compounds). These consumers may ingest, absorb, or engulf their nutrients.
All living organisms of one species that live and interact within an ecosystem.
Organisms, known as producers, that synthesize their own food source (glucose) by using the process of photosynthesis.
An organism that feeds exclusively on plant material, example - a deer.
Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten.
Each step in the food chain or food web is called the _____ level.