All Flashcards
What drives eutrophication?
Excess nutrients, primarily nitrogen and phosphorus.
Why are point sources easier to manage than non-point sources?
Point sources are specific and identifiable, allowing for targeted regulation.
How does eutrophication lead to biodiversity loss?
Dead zones, shading of aquatic plants, and ecosystem cascades.
Explain the role of decomposition in eutrophication.
Decomposition of algae consumes oxygen, leading to hypoxia.
Why is it important to understand trophic states?
Helps assess the health and nutrient levels of aquatic ecosystems.
Why is eutrophication considered a high-value topic?
Connects water pollution, agriculture, human impacts, and ecosystem health.
What is the relationship between algal blooms and sunlight?
Algal blooms block sunlight, preventing it from reaching other aquatic plants.
How does eutrophication affect water chemistry?
Changes pH, temperature, and can lead to ocean acidification.
What is the role of bacteria in eutrophication?
Bacteria decompose dead algae, consuming oxygen and contributing to hypoxia.
How do humans contribute to eutrophication?
Through agriculture, industrial activity, and population growth, releasing excess nutrients.
What are the primary nutrients driving eutrophication?
Nitrogen and phosphorus.
Explain the role of decomposition in eutrophication.
Decomposition of algae consumes oxygen, leading to hypoxia.
Why are non-point sources of pollution difficult to manage?
They are diffuse and widespread, making them hard to trace and control.
How do algal blooms affect sunlight penetration?
They block sunlight, reducing photosynthesis in other aquatic plants.
What is the relationship between eutrophication and biodiversity loss?
Eutrophication leads to dead zones and habitat loss, reducing biodiversity.
How does eutrophication affect water chemistry?
It can change pH, temperature, and increase CO2, leading to ocean acidification.
Describe the characteristics of a eutrophic body of water.
High nutrients, abundant algae and plants, potentially harmful algal blooms.
Describe the characteristics of an oligotrophic body of water.
Low nutrients, clear water, low aquatic life.
What is the role of bivalve mollusks in preventing eutrophication?
They filter water, removing excess nutrients and algae.
How does fertilizer use contribute to eutrophication?
Excess fertilizer runs off into waterways, providing nutrients for algal blooms.
What are the steps of eutrophication?
Nutrient overload -> Algal bloom -> Oxygen depletion -> Hypoxia/Dead zones.