Post on 03-Jun-2018
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Reforestationis the natural or intentional restocking of
existing forestsand woodlandsthat have been depleted, usually
through deforestation.
Reforestation can be used to improve the quality of human life
by soaking uppollutionand dust from the air, rebuild
natural habitatsand ecosystems, mitigate global warmingsince
forests facilitatebiosequestrationof atmospheric carbon dioxide,
and harvest for resources, particularly timber.
http://en.wikipedia.org/wiki/Foresthttp://en.wikipedia.org/wiki/Woodlandhttp://en.wikipedia.org/wiki/Deforestationhttp://en.wikipedia.org/wiki/Pollutionhttp://en.wikipedia.org/wiki/Habitathttp://en.wikipedia.org/wiki/Ecosystemhttp://en.wikipedia.org/wiki/Global_warminghttp://en.wikipedia.org/wiki/Biosequestrationhttp://en.wikipedia.org/wiki/Carbon_dioxidehttp://en.wikipedia.org/wiki/Timberhttp://en.wikipedia.org/wiki/Timberhttp://en.wikipedia.org/wiki/Carbon_dioxidehttp://en.wikipedia.org/wiki/Biosequestrationhttp://en.wikipedia.org/wiki/Global_warminghttp://en.wikipedia.org/wiki/Ecosystemhttp://en.wikipedia.org/wiki/Habitathttp://en.wikipedia.org/wiki/Pollutionhttp://en.wikipedia.org/wiki/Deforestationhttp://en.wikipedia.org/wiki/Woodlandhttp://en.wikipedia.org/wiki/Forest8/12/2019 Presentation1ss Reforestation
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The term reforestationis similar to afforestation, the process of
restoring and recreating areas of woodlands or forests that may
have existed long ago but were deforested or otherwiseremoved at some point in the past.
Sometimes the term re-afforestationis used to distinguish
between the original forest cover and the later re-growth of
forest to an area. Special tools, e.g. tree planting bar, are used
to make planting of trees easier and faster
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Management
Reforestation of large areas can be done through the use of
measuring rope (for accurate plant spacing) and ribbed, (or wheeled
augers for planting the larger trees) for making the hole in which
aseedlingor plant can be inserted.
Indigenous soil inoculants (e.g., Zaccaria bi color) can optionally be
used to increase survival rates in hardy environments.
A debatable issue in managed reforestation is whether or not the
succeeding forest will have the samebiodiversityas the original
forest.
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If the forest is replaced with only one species of tree and all
other vegetation is prevented from growing back,
a monocultureforest similar to agricultural crops would be the
result.
most reforestation involves the planting of different feedlots of
seedlings taken from the area often of multiple species.
Another important factor is the natural regeneration of a wide
variety of plant and animal species that can occur on a clear
cut.
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In some areas the suppression of forest fires for
hundreds of years has resulted in large single aged and
single species forest stands.
The logging of small clear cuts and or prescribed
burning, actually increases the biodiversity in these
areas by creating a greater variety of tree stand ages
and species.
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Harvesting
Reforestation need not be only used for recovery of accidentally destroyed
forests.
In some countries, such as Finland,the forests are managedby the wood
products andpulp and paper industry.
In such an arrangement, like other crops, trees are replanted wherever they
are cut.
In such circumstances, the industry can cut the trees in a way to allow
easier reforestation.
The wood products industry systematically replaces many of the trees it
cuts, employing large numbers of summer workers fortree plantingwork.
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Reforestation, if several native species are used, can provide other
benefits in addition to financial returns, including restoration of the
soil, rejuvenation of local flora and fauna, and the capturing and
sequestering of 38 tonsof carbon dioxideper hectareper year.
A major tree-planting program in a place like this would enhance
the local climate and reduce the demands of burning large amounts
of fossil fuels for cooling in the summer.
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For climate change mitigation
Forests are an important part of the global carbon cyclebecause trees and plants
absorb carbon dioxide throughphotosynthesis.
By removing this greenhouse gasfrom the air, forests function as
terrestrial carbon sinks, meaning they store large amounts of carbon. At any time, forests account for as much as double the amount of carbon in the
atmosphere.
Even as more anthropogenic carbon is produced, forests remove around three
billion tons of anthropogenic carbon every year.
This amounts to about 30% of all carbon dioxide emissions from fossil fuels.
Therefore, an increase in the overall forest cover around the world would tend
to mitigate global warming.
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Incentives
Some incentives for reforestation can be as simple as a financial
compensation.
Streck and Scholz (2006) explain how a group of scientists from various
institutions have developed a compensated reduction of deforestation
approach which would reward developing countries that disrupt any further
act of deforestation.
Countries that participate and take the option to reduce their emissions from
deforestation during a committed period of time would receive financial
compensation for the carbon dioxide emissions that they avoided.
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Criticisms
Reforestation competes with other land uses such as food
production, livestock grazing, and living space for further economic
growth.
There is also the risk that through a forest fire or insect outbreak
much of the stored carbon in a reforested area could make its way
back to the atmosphere. Reduced harvesting rates and fire
suppression have caused an increase in the forest biomass in thewestern United States over the past century.
This causes an increase of about a factor of four in the frequency of
fires due to longer and hotter dry seasons.