Term
| An event that damages biological communities is known as a ___. |
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Definition
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Term
| Succession is ___. Primary succession occurs after ___. Secondary succession occurs when a ___ is destroyed but the ___. |
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Definition
patterns of change in community composition in response to disturbances
all life has been removed
community has been removed
the soil remains |
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Term
| There are three models of succession. In facilitation ___. In inhibition ___. In tolerance ___. |
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Definition
early vegetation accomodates later vegetation
early species deny access to new species
early species do not benefit or hinder new species |
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Term
| Hardwoods (ex. ___) tend to climax in a community over softwoods (ex. ___) after about 100 years. This is consistent with the tend for ___-strategists to dominate over ___-strategists over time. |
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Definition
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Term
| ___ tested the Intermediate Disturbance Hypothesis by Huston and Connell and found that ___ sized rocks had the greatest diversity. |
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Definition
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Term
| Lodgepole ___ are adapated to periodic ___. They return nutrients to the soil and open the pine cones. |
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Definition
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Term
| An ecosystem consists of all of the ___ in a community and their ___ environment. |
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Definition
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Term
| Enrgy ___ through an ecosystem and chemical nutrients ___ within the ecosystem. |
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Definition
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Term
| The ultimate source of energy for most ecosystems is radiant energy from ___. |
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Definition
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Term
| In a food chain, the arrows represent the flow of ___ from the ___ to the ___. |
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Definition
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Term
| Non-living organic material is known as ___. Decomposers and herbivores feed off them. |
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Definition
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Term
| In the producer food chain, the immediate energy source is the primary producers (ex. ___). In detrital food chains, the immediate energy source is decomposing ___. The ultimate energy source in both is ___. |
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Definition
plants
organic matter
the sun |
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Term
| Colinvaux attempted to explain why large animals are so rare. This is because only about ___% of energy is passed up each tropic level. This causes there to usually be ___ to ___ trophic levels in total. |
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Definition
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Term
| When organisms retain energy, about ___% goes towards maintenance activities, ___% is excreted and ___% goes towards growth and reproduction. |
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Definition
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Term
| The first law of thermodynamics says that energy is ___. The second says that when energy is ___, part of it cannot be passed on. The law of conservation of mass says that matter is ___. |
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Definition
neither created or destroyed
transformed
neither created or destroyed |
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Term
| An ecosystem comprised of ___ (four things) is linked through the flow of ___. |
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Definition
primary producers, consumers, decomposers and the abiotic environment
energy |
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Term
| Allelopathy is seen in the inhibition model of succession and is when ___. |
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Definition
| plant roots inhibit other plants from growing |
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Term
| The inhibition model of succession creates a ___ distribution. |
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Definition
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Term
| Energy is in a/an ___ (open/closed) system. Nutrients are in a/an ___ (open/closed) system. |
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Definition
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