|
World
wide peatlands are being destroyed
everyday. This destruction creates several
threats to the environment.
One
threat to our global peatlands is by using
them for agricultural purposes. Amateur
gardeners account for approximately 70% of
the peat used in horticulture. To extract
peat from the bog the area is first
drained. This damages the delicate
ecosystem as an imbalance has been created
from the removal of a natural habitat.
This is done so the peat layers can be
dried by the sun so peat extracting
equipment can access the peatlands without
fear of sinking. A typical peat extractor
removes up to 22cm of peat a year, while a
peat bog increases in depth of only 1mm
per year. It will take 220 years for the
peat bog to renew itself, and the
ecosystem that once supported wildlife and
plant life is likely to never return (Roe,
2006).
Another
threat to the environment through peat
extraction is the amount of carbon
released. Current studies suggest carbon
dioxide is the leading cause of global
warming. Peat bogs act as a carbon sink,
and absorb 10-20 percent of the seven
gigatons of carbon produced by humans
annually. This absorption is attributed to
a peat bogs soggy makeup (
Chester
, 2000). In total, it is believed that
peatlands hold around one quarter to one
third of the total carbon in the world.
Naturally, peatlands release carbon very
slowly due to the slow decomposition. When
harvesting occurs, all the carbon held
within is released into the atmosphere. As
a result, thousands of years of carbon
held in peatlands, is released into the
atmosphere as carbon dioxide. |