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Ecology Exam 5
Bio 1004 University of Central Missouri
| Question | Answer |
|---|---|
| Nutrient | a chemical element required for metabolism and growth. Ex: calcium, zinc, protein |
| Nutrient Cycling | movement of nutrients within an ecosystem |
| Nitrogen Fixation | nitrgen is converted into a useable form |
| Mineral | solid substanes with charcteristic chemical properties formed from geological processes |
| Rock | collectin of different minerals |
| Biomagnification | an increase in the concentration of a substance |
| Climate Change | a directional change in climate over a period of several decades |
| Conservation Biology | the scientific study f phenomena that affect the maintenance, loss, and restoratin of biodiversity |
| Overexploitation | so many individuals are removed that a populatin cannot sustain itself. EX: cod fish were over fished and their pop. crashed. EX2: over hunting of gray wolves |
| Sustainability | the capacity to use resources in a way that does not impair them or deminish them |
| Sustainable Development | meeting the needs of the present without compromising the ability of future generations to meet their own needs |
| What are the two abiotic sources in which nutrients are derived? | 1) Atmospheric gases or deposition 2) Minerals in ROCK |
| Is atmospheric gas a useable form for most organisms? | Some gases are NOT useable by most organisms. They must be FIXED |
| What are aerosols? | fine soil particles made up of solids, liquids, and gases |
| zin what ways are aerosols deposited into an ecosystem? | aerosols fall from the atmospher due to: 1) Precipitation (Wet Fall)Rain 2) Gravity (Dry Fall)Wind |
| What process releases nutrients from rock? | Weathering |
| How do nutrients leave the ecosystem? | 1) convesion of gas (nitrogen cycle) 2) water runoff (leaching) 3) wind |
| How are nutrients cycled through an ecosystem? | Nutrients pass through organisms and are released during decomposition. |
| Why is Detritus important? | It is an important source of nutrients. |
| Decomposition is important because it releases nutrients as what? | Simple soluble compounds. It is natures way of recycling |
| Does the rate of decomposition increase or decrease in warm temperatures/climates? | Increase. Decompostion is faster at warm temps |
| Does the rate f decompotion increase or decrease with intermediate soil temperatures? | Increase. Decmposition is faster with intermediate soil mistures |
| What zone(s) in the aquatic system have high nutrient demands? | Photic zone Littoral zone |
| What zones are nutrients typically lst to? | Benthic zone |
| How are nutrients in the lake replinished after being lost? | during overturn |
| What type of lake is nutrient poor, with low productivity, and no rooted plants/algea(rock bottom)? | Oligotrophic lakes |
| What type of lake is nutrient rich, with high productivity, and lots of rooted vegetation? | Eutrophic Lakes |
| In what two ways does nitrogen fixation occur? | High energy fixation Biological fixation |
| How many reservoirs are there for carbon and what are they? | 4: atmosphere, ocean, land surface, sedidments and rocks |
| What are the reservoirs for phosphorus? | rck, terrestrial soils, marine sediments |
| What are the reservoirs for sulfur? | rck, sediments, ocean, atmosphere |
| What two areas can absorb excess carbon? | Forest sinks and Oceans |
| Does extra carbon in the ocean increase carbonic acid? | Yes. It also increases diffusion and acidity |
| Which chemical compounds produce acid rain? How do these compounds enter an ecosystem? | Nitrogen oxides and sulfur dioxide. These componds enter the ecosystem through wet fall (rain, snow, fog) |
| How dose acid effect oceans? | Dissolves shells, lowers ability to synthesize(grow) shells |
| How does acid rain effect the environment? | Loss of biodiversity in aquatic systems, forest destruction, thinning of shells. |
Created by:
haley6
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