Question

1. creating ____________ ____________ by moving ships between areas
2. ______________: removing fish faster than they can replenish

freshwater systems

• used for ____________ and ____________ (cannot use salt water)
• provide ______________ through dams
• moderate ______________
• support ____________ and ____________
• ______________ systems: standing water (lakes, ponds, wetlands)
• ______________ systems: flowing water (rivers, streams, brooks)

lake zones

1. ______________ zone: near banks, high biodiversity, where frogs and turtles live
2. ______________ zone: still gets sunlight, photosynthesis occurs, larger fish
3. ______________ zone: deeper water, too dark for photosynthesis, low oxygen
4. ______________ zone: bottom area with decomposers and detritus feeders

lake nutrient levels
oligotrophic lakes

• ______________ nutrient levels
• ______________ clear water
• example: blue waters (crystal clear)

eutrophic lakes

• ______________ nutrient levels
• more ______________ (cloudy)
• more things growing in them

cultural eutrophication

• caused by ______________ adding nutrients
• main nutrients involved: ____________ and ____________
• process:

1. fertilizer runs into water
2. ______________ grows rapidly
3. blocks ______________
4. when algae dies, **______________ consumes it
5. ______________ levels decrease
6. aquatic life suffers

Explanation:

This is a fill - in - the - blank exercise related to freshwater systems, lake zones, and eutrophication concepts in environmental science. For example, over - fishing is the removal of fish faster than they can replenish. Freshwater systems are used for drinking and irrigation. Lentic systems are standing water bodies and lotic are flowing water bodies. Lake zones include littoral, limnetic, profundal and benthic. Oligotrophic lakes have low nutrient levels and clear water, while eutrophic lakes have high nutrient levels and are more turbid. Cultural eutrophication is caused by human activities adding nutrients like nitrogen and phosphorus, leading to algal blooms, oxygen depletion and harm to aquatic life.

Answer:

1. (No clear context to fill this one precisely from the given info, could be something like 'ecological connections' if related to ship - movement effects on ecosystems)
2. Over - fishing

Freshwater Systems:

• Drinking; Irrigation
• Hydroelectric power
• Water flow
• Aquatic life; Wetland habitats
• Lentic
• Lotic

Lake Zones:

1. Littoral
2. Limnetic
3. Profundal
4. Benthic

Lake Nutrient Levels:
Oligotrophic Lakes:

• Low
• Very

Eutrophic Lakes:

• High
• Turbidity

Cultural Eutrophication:

• Human activities
• Nitrogen; Phosphorus
• Algae
• Sunlight
• Bacteria
• Dissolved oxygen