Ecosystem Dynamics
Coral polyps provide calcium carbonate shelter to photosynthetic algae, while the algae supply sugars to the coral in this type of symbiotic relationship where both species benefit.
What is mutualism?
Water exits plant leaves and enters the atmosphere as water vapor through stomata via this process.
What is transpiration?
The degradation or depletion of an unowned, shared public resource due to individual self-interest is known as this environmental phenomenon.
What is the Tragedy of the Commons?
As water temperatures rise in aquatic biomes, the maximum concentration of this vital gas decreases, stressing marine life.
What is dissolved oxygen?
Planting large acreage with a single crop species year after year, a practice that reduces genetic diversity and increases pest susceptibility, is called this.
What is monocropping (or monoculture)?
Five species of warblers coexisting in different vertical layers of the exact same spruce tree canopy demonstrate this ecological mechanism.
What is spatial resource partioning?
This primary biological process removes carbon dioxide directly from the atmosphere and converts it into glucose.
This term refers to the layer of soil, rock, and vegetation stripped away during surface mining to reach an underlying mineral deposit.
What is overburden?
Asphalt, concrete, and rooftops in urban centers are examples of these surfaces that prevent groundwater infiltration and increase stormwater runoff.
What are impervious surfaces?
Among the "Three Rs" (Reduce, Reuse, Recycle), this option is the most sustainable because it eliminates raw material extraction, manufacturing, and shipping entirely.
What is reducing?
This shallow freshwater lake zone near the shore receives enough sunlight to support rooted emergent plants like cattails.
What is the littoral zone?
Low average annual temperatures, frozen permafrost soils, and extremely slow rates of organic matter decomposition characterize this terrestrial biome.
What is the tundra?
Acid mine drainage forms when rainwater seeping into abandoned mines reacts with this iron sulfide mineral to produce sulfuric acid.
Over-pumping fresh groundwater from coastal wells lowers table pressure and causes this type of aquifer contamination.
What is saltwater intrusion?
Sanitary landfills use drainage pipes at the bottom to collect this toxic, contaminated liquid runoff before it can reach groundwater aquifers.
What is leachate?
If primary producers in a forest store 100,000 J of chemical energy, this is the amount of energy available to tertiary consumers according to the 10% Rule.
What is 100 J?
Soil bacteria and rhizobacteria in legume root nodules convert atmospheric nitrogen gas (N2) into bioavailable forms like ammonia during this process.
What is nitrogen fixation?
Replacing biodiverse mature forests with these single-species, uniform-age commercial tree stands lowers overall ecosystem resilience.
What are tree plantations (or monoculture forests)?
Urban planners draw these geographical boundaries around cities to prevent suburban sprawl and mandate denser development.
What are urban growth boundaries?
Composting food scraps and yard waste prevents anaerobic decomposition in landfills, reducing the emission of this potent greenhouse gas.
What is methane?
To achieve Maximum Sustainable Yield (MSY), a population should be maintained at approximately this fraction of its carrying capacity (K).
What is at or below 1/2?
Phosphorus is frequently a limiting nutrient in ecosystems because its cycle notably lacks this phase.
What is an atmospheric (or gaseous) phase?
The Bureau of Land Management regulates livestock overgrazing on public western rangelands by issuing these and collecting usage fees.
What are grazing permits?
While an ecological footprint measures land area required to support resource consumption, this footprint specifically measures annual greenhouse gas emissions in CO2 equivalents.
What is a carbon footprint?
Synthetic fertilizer runoff triggers massive algal blooms whose eventual death and bacterial decay deplete dissolved oxygen, creating these hypoxic marine areas.
What are deadzones?