Term
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Definition
| A group of individuals of the same species living within a specified area. |
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Term
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Definition
| The number of individuals per unit of area or volume in the habitat. |
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Term
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Definition
| Forced by the occurrence of resources, ‘_______’ is the most common dispersion pattern in nature. |
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Term
| Births, Deaths, Immigration, Emigration |
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Definition
| Factors determining population size. |
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Term
| ZPG (Zero Population Growth) |
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Definition
| When births and deaths are equal, there is _______. |
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Term
| Intrinsic Rate of Increase (r) |
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Definition
| The difference between the birth rate and death rate. |
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Term
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Definition
| _______ is determined by resource availability and organismal tolerance of habitat conditions. |
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Term
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Definition
| A flood that eliminates a population of rabbits would be a _______ event. |
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Term
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Definition
| Food supply would be regarded as a _______ control on a population. |
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Term
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Definition
| The proximate and primary cause of human deaths worldwide is _______. |
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Term
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Definition
| _______ can be caused by increasing K, new habitats, removing limiting factors, or better medicines. |
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Term
| Later, humans adopted grasses as the basis for agriculture and the construction of human civilizations. |
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Definition
| Later, humans adopted grasses as the basis for agriculture and the construction of human civilizations. |
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Term
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Definition
| If human population growth actually fell to ZPG level, it would take _______ years for population growth to stop. |
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Term
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Definition
| A rapidly growing population shows an _______ that is a pyramid with a very broad base. |
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Term
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Definition
| Cycling of nutrients and flow of energy between community and the environment. |
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Term
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Definition
| Without _______ most nutrients would stop cycling and wastes would accumulate. |
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Term
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Definition
| Primary producers depend only on the available energy from _______ sources, not other trophic levels. |
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Term
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Definition
| Most of the energy within an ecosystem is ultimately lost through heat from _______. |
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Term
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Definition
| Accumulation of toxic materials as nutrients move through a food chain is _______. |
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Term
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Definition
| Equal to the energy stored in plant tissue minus energy used in cell respiration. |
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Term
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Definition
| _______ does not cycle through an ecosystem. |
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Term
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Definition
| _______ is stored in living biomass, fossil fuels, rocks, or shells of animals. |
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Term
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Definition
| In the atmosphere, _______ is currently increasing and acts as a greenhouse gas. |
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Term
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Definition
| The main source of increasing greenhouse gases in the atmosphere is _______. |
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Term
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Definition
| Crop rotation involving legumes can be used to replace or maintain soil _______. |
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Term
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Definition
| _______ organisms include all those except primary producers. |
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Term
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Definition
| All of the major _______ except P have an atmospheric phase in their biogeochemical cycling. |
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