Toxic air is causing malnutrition in trees

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Mains Paper 3: Environment | Conservation, environmental pollution and degradation, environmental impact assessment

From UPSC perspective, the following things are important:

Prelims level: Mycorrhizal fungi

Mains level: The newscard discusses impacts of air pollution on Trees.


News

Trend in Europe is alarming

  1. Besides affecting human health, air pollution is also causing malnutrition in trees by harming a fungus that is important for providing mineral nutrients to tree roots, finds a new study.
  2. Mycorrhizal fungi are hosted by the trees in their roots to receive nutrients from the soil.
  3. These fungi provide essential nutrients like nitrogen, phosphorus and potassium from soil in exchange for carbon from the tree.
  4. This plant-fungal symbiotic relationship is crucial for the health of the tree.
  5. However, high levels of the nutrition elements like nitrogen and phosphorus in the mycorrhizae change them to act as pollutants rather than nutrients.

Impact of the malnutrition

  1. The signs of malnutrition can be seen in the form of discolored leaves and excessive falling of leaves.
  2. This leaves forests vulnerable to pests, disease and climate change.
  3. The researchers noted that ecosystem changes can negatively affect tree health.
Air Pollution
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