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blooms thus, leading to eutrophication. It harms aquatic ecosystems by fueling
excessive algae growth, which overshadows the water surface and deprives
other aquatic organisms of necessary sunlight. When the algae dies, the oxygen
consumed in the decomposition process can further deprive other aquatic
organisms of needed oxygen.

3. When
a tree is cut down its
roots die too. Plant roots
anchor nutrients such
as nitrogen and
phosphorous in the soil.
These nutrients are free
to move with runoff into
rivers and the ocean
once forests no longer
hold them in place.Thus
it causes a decrease in
organic nitrogen in an
area.

4. Human activities such as deforestation and development have
largely changed the dynamics of nitrogen in forests. Sewage overflows and
livestock farming also add nitrogen to aquatic and terrestrial ecosystem.