Term
| Biogeochemical cycles are fluxes of ___ and ___ between ___ and ___ components. |
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Definition
water
nutrients
non-living
living |
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Term
| Abiotic reservoirs are ___. |
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Definition
| chemical stockpiles outside of living organisms |
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Term
| There are four major cycles: ___ (four cycles). |
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Definition
water
nitrogen
carbon
phosphorous |
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Term
| The greatest exchange of water takes place at ___. |
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Definition
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Term
| The nitrogen cycle has two abiotic reservoirs: ___ (two reservoirs). |
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Definition
the atmopshere (comprising about 80% of it)
soil |
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Term
| The phosphorous cycle is the only one to ___. P returns to the soil via ___. A significant reservoir of P are the ___. P is unavailable to phytoplankton unti ___ and is considered a ___. |
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Definition
not have a gaseous state
decomposers
oceans
upwellings
limiting factor |
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Term
| Eutrophication is when excess ___ cause excess ___ and death of ___ due to lack of ___. It is closely linked to ___. The excess nutrients come from things like fertilizers, pesiticides, etc. |
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Definition
aqueous nutrient levels
plant growth
animals
oxygen
anoxia/hypoxia |
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Term
| Excess CO2 is fueling global warming. Temperature increases are not distributed evenly, but on average are expected to rise between ___ by the end of this century. |
|
Definition
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Term
| Generally, CO2 concentration rises during the ___ and fall during the ___. |
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Definition
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Term
| As temperatures and CO2 output increase, the area of wet forest is expected to ___. |
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Definition
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Term
| Biodiversity has three levels: ___. |
|
Definition
ecosystem diversity
genetic diversity
species diversity
*Remember: egs -> "eggs" |
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Term
| Evolutionary biologist E.O. Wilson predicts that ___. |
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Definition
| Earth is undergoing a sixth mass extinction, because about 30,000 species per year are going extinct |
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Term
| There are about ___ named species. Extirpation occurs when ___. Extinction occurs when ___. |
|
Definition
1.8M
a single population of a species is lost
an entire species is lost |
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Term
| ___ is the greatest threat to biodiversity; ___ is the second greatest threat; ____ is the third greatest threat. |
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Definition
habitat loss
introduction of invasive species (ex. purple loosestrife in NA, brown tree snake in guam, fungus on American chestnut)
overexploitation |
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Term
| ___ reserves are undistrubed wildlands surrounded by buffer zones of compatible economic development. |
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Definition
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Term
| ___ is travel to natural areas for tourism and recreation. |
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Definition
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Term
| Ex-situ conservation are ___. |
|
Definition
| captive breeding programs |
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Term
| "Fixing" is when organic material is turned ___ (ex. molecular nitrogen -> ammonia). |
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Definition
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