Review for Tuesday Test

Definition of ecological services: Benefits provided by ecosystems to humans, categorized into various types.
  - Regulating Services: Processes that regulate environmental conditions (e.g., climate regulation, flood control).
  - Provisionary Services: Resources provided by ecosystems (e.g., food, fresh water).
  - Cultural Services: Non-material benefits such as recreation, education, and spiritual enrichment.
Assessment of Examples: Understand which examples correspond to each type of service for possible examination questions.

Various terms to understand:
  - Species Richness: The number of different species in a specific area.
  - Biodiversity: The variability of life forms within a given ecosystem or habitat.
  - Species Evenness: The relative abundance of different species in a given area.
Analysis of Graphs: Be prepared to interpret graphs that illustrate biodiversity metrics and define the terms based on visuals.

Example Question: "Which of the following is not an ecological service?"
Highlight the common mistake of identifying farmers making money as an ecological service.

Definition of Sinks: Areas where a substance accumulates or is stored within an ecosystem.
  - Sulfur Sink: Typically associated with coal; found in the geosphere.
  - Phosphate Sink: Exists within the geosphere, similar to sulfur.
  - Nitrogen Sink: Predominantly located in the atmosphere (78% nitrogen content).
  - Carbon Sink: Exists in oceans (carbon dioxide dissolution leads to calcium carbonate formation) and forests (glucose storage in plants).
  - Notable Carbon Sinks: Rainforests, coastal waters, and coral reefs due to high rates of primary production.

Carbon Cycle Problems:
- Excess CO2 emissions lead to global warming, caused mainly by burning fossil fuels and deforestation.
- Consequences include ocean acidification (CO2 reacts with water to form carbonic acid).
Sulfur Cycle Problems:
- Acid deposition driven by sulfur runoff from coal mining, leading to acid drainage.
Nitrogen Cycle Problems:
- Related to air pollution caused by excess nitrogen oxides (NOx) and lead to global warming, acid deposition, and eutrophication.
Water Cycle Issues:
- Inefficient use leading to aquifer depletion, and addressing irrigation systems as primary causes of water scarcity.

Understanding Aquifers:
  - Definition: Underground layers of water-bearing rock.
  - Well: A structure for tapping into an aquifer.
  - Artesian Well: A specific type of well where water naturally flows under pressure.
  - Zone of Saturation: Area where all available voids are filled with water; includes the water table, which is the upper surface of this zone.
Important Concepts:
- Over-extraction can lead to problems such as sinkholes, water intrusion, and depletion of the water table.

Testing for several parameters:
  - pH Levels: A pH lower than 5.6 indicates acid rain; typical water pH is between 7-8.
  - Nitrates and Phosphates: Common indicators of water quality, where excess nitrates can lead to eutrophication.
  - Dissolved Oxygen: Crucial for aquatic life; temperatures and organic waste can reduce levels.
  - Turbidity: Dependence on sediment concentration; high turbidity can impede photosynthesis and reduce water clarity.

Types of Lakes by Nutrients:
  - Oligotrophic Lakes: Clear water, low nutrient levels.
  - Mesotrophic Lakes: Moderate nutrient levels, typically murkier water.
  - Eutrophic Lakes: High nutrient levels, often green or algal blooms.
  - Hyper Eutrophic: Result of cultural eutrophication (human-made nutrient surplus).

Benthic Zone: The ocean floor where various ecological activities take place.
Significant ecological areas:
- Coral Reefs: Known for high biodiversity.
- Estuaries and Coastal Zones: Important for various life forms.
Ocean Layers:
- Euphotic Zone: Area where light penetrates, allowing photosynthesis.
- Aphotic Zone: Area devoid of light.

First Law of Thermodynamics: Energy is neither created nor destroyed, only transformed.
Energy Flow: Generally flows from the sun to producers (plants) and then through the food web.
- Primary Producers: Convert sunlight into usable energy through photosynthesis; the energy they produce is known as gross productivity.
- Net Productivity: The energy remaining after plants use some for their own metabolism.
Energy Transfer Efficiency: Only 10% of energy is passed to the next trophic level; 90% of energy is lost as heat during transitions.

Definition of Relationships in Ecosystems: How various species interact and influence one another's populations.
Species Diversity: Consists of three levels - species richness, species evenness, and functional diversity.
Gene Diversity: Genetic variation within species that can affect ecological resilience and adaptability.
Be prepared to describe environments exhibiting different types of diversity and function.

This study guide encompasses significant themes related to ecological systems, biodiversity, aquatic environments, and energy transfer processes. Familiarity with definitions and the ability to connect concepts to real-world applications will be key in preparing for the upcoming test.