After intensive logging, most of the trees along a stream have been removed. which of the following water quality changes would most likely occur downstream after logging?
Question: After intensive logging, most of the trees along a stream have been removed. which of the following water quality changes would most likely occur downstream after logging?
After intensive logging, the removal of trees along a stream can have significant impacts on water quality downstream. Let's explore the likely changes:
1. Increased Sedimentation:
- Logging disturbs the soil, leading to erosion.
- Soil particles are washed into the stream, causing increased turbidity (cloudiness).
- Sedimentation can harm aquatic organisms by clogging their gills and disrupting habitats¹.
2. Nutrient Imbalance:
- Nutrient runoff occurs when soil nutrients (such as nitrogen and phosphorus) are carried into the stream.
- Excessive nutrients can lead to algal blooms, depleting oxygen levels and harming aquatic life.
- The nitrogen-to-phosphorus ratio may change, affecting nutrient availability for plants and algae².
3. Temperature Changes:
- Without tree cover, direct sunlight reaches the water surface, causing temperature fluctuations.
- Warmer water can stress cold-water species and alter ecosystem dynamics¹.
4. Loss of Riparian Vegetation:
- Trees and other vegetation along stream banks (riparian zones) stabilize soil, filter pollutants, and provide shade.
- Their removal reduces these benefits, impacting water quality and aquatic habitats¹.
In summary, logging disrupts the delicate balance in stream ecosystems, leading to increased sediment, altered nutrient levels, temperature changes, and loss of riparian vegetation. Best management practices are crucial to mitigate these negative effects and protect downstream water quality.
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