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EXECUTIVE
SUMMARY
Wetlands commonly called morass represent
less than two percent of Jamaica's total surface area, and occur for the
most part in the coastal zone. These areas are among the most biologically
productive ecosystems, and play a great part in ensuring coastal stability.
Coastal wetlands that support mangrove growth are particularly important
as marine nurseries and as sources for the harvesting of shellfish.
In addition to the national significance,
government has a wider responsibility to conserve wetlands (especially
those which are waterfowl habitats) as a signatory to the Ramsar Convention
on Wetlands of International Importance.
Government has adopted the mangrove and coastal
wetlands protection policy and regulation in order to promote the management
of coastal wetlands to ensure that the many benefits they provide are sustained.
The policy sets the following five goals
in support of the overall aim of sustainable use of wetlands:
(iv) Maintain the functions and values
of Jamaica's wetland resources;
(v) Integration of wetland functions in planning
and development of other resource sectors such as agriculture, forestry,
fisheries, ecotourism, and waste management;
In pursuing the goals of the mangrove and coastal
wetlands protection policy, government will be guided by the following
established principles:
(a) Wetlands are an important part of Jamaica's
coastal resources and their preservation is a key component of coastal
area management.
(b) Wetlands protection can only be achieved
by the combined and coordinated effort of individuals, organisations, and
communities having an interest in these areas.
(c) Improved public awareness of the vital
functions of wetlands is necessary to ensure conservation of wetlands.
Twenty five specific policy statements are made
on how the goals will be achieved, and general information on Jamaica's
wetlands as well as recommended regulatory provisions are annexed.
Specifically the policy seeks to:
* Provide protection against dredging,
filling, and other development;
* Designate wetlands as protected areas;
* Protect wetlands from pollution particularly
industrial effluent sewage, and sediment;
* Ensure that all developments planned for
wetlands are subject to an Environmental Impact Assessment (EIA);
* Ensure that traditional uses of wetlands
are maintained;
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OVERVIEW
Wetlands, commonly called morass are among
the most biologically productive of all Caribbean ecosystems. Low lying
coastal wetlands that support mangrove growth are particularly important
as marine nurseries and as sources for the harvesting of shellfish.
The term "Wetlands" refers to a site where
plants and animals have become adapted to temporary permanent flooding
by saline brackish or fresh water. This document focusses on coastal wetlands
and includes permanently or temporary flooded lands with sedge or grass
morass, swamp forest or mangroves.
Wetlands represent less than two percent
of Jamaica's total surface area, and occur for the most part in the coastal
zone.
Awareness of the role played by wetlands
in contributing to coastal resource productivity is relatively new, and
formerly these areas were regarded as a source of disease, particularly
malaria, and a menace to public health. Wetlands destruction was also hastened
by draining in an attempt to create agricultural lands particularly for
the planting of rice and other moisture-tolerant crops. Extensive marshlands
in Jamaica, and elsewhere in the Caribbean, were also drained for crop
cultivation including sugar cane.
More recently, the filling of wetlands, particularly
coastal wetlands, has resulted from expanding tourism development, as well
as from urban growth extending outward from congested central areas.
Marine terminals and warehouses, freeport
sites for industry, and residential subdivisions have replaced coastal
wetlands, particularly in estuarine locations. The greatest destruction
has occurred in the larger estuaries now used for harbor facilities such
as along Hunt's Bay and the Kingston waterfront.
Several attempts to convert wetlands to farmlands
have been unsuccesful, and housing developments on drained wetlands are
regarded as highly vulnerable to the effects of natural disasters.
The net result has been a major depletion
of Jamaica's wetlands, and the degradation of other wetlands near urban
areas. The management of these areas must be undertaken with urgency in
order to ensure that we will continue to benefit from their many uses.
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1.
FUNCTION AND USES OF WETLANDS
Despite representing less than two percent
of Jamaica's total surface area, wetlands perform invaluable ecological
functions in their natural state. The role of coastal wetland ecosystems
in maintaining shoreline stability and preserving biodiversity is well
established. In addition these areas provide direct socio economic benefits,
through human exploitation.
1.1
NATURAL FUNCTIONS OF WETLANDS
(i) Shoreline Protection
Coastal wetlands protect the shoreline from
erosion by acting as a buffer against wave action as in the case of coastal
mangroves.
(ii) Flood Protection
Wetlands reduce the effect of floods on
coastal areas by acting as a sponge and slowing down flood waters as in
the case of coastal marshlands. In the absence of wetlands the full force
of flood waters would cause erosion of river banks, and also kill coral
reefs.
(iii) Sediment Trap
Sediment produced by erosion from upland
areas settles out when the water flow slows upon entering wetlands. This
helps in preventing silting up of rivers, thus preventing flooding of adjoining
areas. As a sediment trap, wetlands also protect marine resources such
as coral reefs and sea grass beds from being smothered by silt brought
down by rivers and streams.
(iv) Wildlife Habitat And Nursery Area
Jamaicas coastal wetlands support a rich
indigenous flora, and fauna, with several of the species being endemic.
These include, Grias cauliflora, the only native representative of the
Brazil nut family Lecythidaceae, the swamp palm (Roystonea princeps),
the thatch palm (Sabal jamaicensis), and the naseberry
bullet (Manilkara sideroxylon).
Wetlands support various species of birds,
crabs, fish, shrimps, and the American crocodile. The Black River Morass
for example has been described as the best area in Jamaica for all water
birds, and is known to be the only area where the flamingo still nests
occasionally. Commercially important species using the wetland as a breeding
and nursery area include snapper, snook, tarpon, jack, and several species
of fresh and brackish water shrimps.
(v) Land Building
Mangrove wetlands are regarded as land builders.
Because of their submerged root system, mangroves retard water movement
and trap suspended materials and the remains of organisms associated with
the mangroves. The accumulation of this organic material contributes to
raise the soil level. Continued accumulation of soil, particularly by sea-fringing
mangrove stands, builds the shoreline seaward.
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1.2
HUMAN EXPLOITATION OF WETLANDS
(i) Timber cutting
Wetland areas provide wood for the making
of charcoal, fish pots, and to a lesser extent, racks for oyster farming.
(ii) Fishing/Shrimping
As a habitat for many species of fish and
shellfish wetlands are important to Jamaicas fishing industry. The sustainability
of Jamaica's fishery is directly dependant upon the habitat provided by
wetlands and other coastal systems such as coral reefs. The Black River
Lower Morass has traditionally supported an important local shrimp industry.
(iii) Recreation/Tourism
If properly managed, mangrove wetlands can
be important in generating ecotourism. Wetlands offer recreational opportunities
such as sight-seeing, boating, swimming, and sport fishing. Boat excursions
into wetlands is gaining increasing popularity as a tourist attraction.
(iv) Scientific/Educational
Mangrove and coastal wetlands can serve
as a living laboratory providing opportunity for education and research
concerning the ecological, and possibly medicinal value of various species
of plants and animals.
(v) Agriculture/Building
Fringe wetland areas may be used successfuly
for the cultivation of certain crops eg. sugar-cane, and vegetables. It
is possible to do some construction in wetlands provided that it does not
result in restriction of water flows.
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2.0
ISSUES AFFECTING WETLANDS
The major issues affecting wetlands
generally result from a lack of recognition of the wide range of benefits
-- ecological, economic and scientific -- which they provide. This has
led to the conversiion of large tracts of coastal wetlands, particularly
mangrove communities with no attempt to replace these resources at other
sites.
The following are among the major issues
affecting wetlands:
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(i) Pollution
Pollutants directly affecting wetlands include
garbage, sewage, industrial waste (mainly from sugar factories), and oil
spills. In addition wetlands are subject to the indirect effects of:
- Contamination by substances that are
transported by run-off of storm waters in urban areas;
- Non-point source pollution by agro-chemicals,
nutrients, and other materials used in agriculture that are released to
streams and rivers and eventually into wetland areas;
- Large scale pumping from coastal aquifers
which affects the water balance inducing saltwater intrusion;
Mangroves tend to trap and concentrate pollutants.
The extent to which various types of pollutants, other than oil and sediments,
contribute to mangrove destruction is uncertain. However, it is known that
in mangrove-fringed estuaries, pollutants, and/or temperature and salinity
changes, tends to upset the delicate balance of microscopic life, drastically
altering the entire coastal ecosystem.
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(ii) Land reclamation (Draining
and filling)
Formerly, swamps were regarded mainly as
a source of disease, particularly malaria, and a menace to public health.
In an era when malaria posed a major threat, such a policy was clearly
in the public interest.
More recently, the spiralling cost of land,
and the ever increasing demand for dwelling space, has led to the building
of extensive communities on cheaper "dumped up" land as one means of providing
affordable housing.
Wetlands destruction has also been causd
by draining of land for argiculture. Extensive tracts of wetlands in Jamaica,
have been drained for the planting of rice and other moisture-tolerant
crops, as well as for the cultivation of sugar cane.
Wetlands destruction has been shown to result
in loss of fishery resources eg. in the Hunts Bay/Kingston Harbour system.
Wetlands destruction is also known to result in the loss of unique species
such as the phosphorescent algae, the source of Falmouth's once famous
"Glistening Waters".
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(iii) Reduced flood control
The draining of wetlands by widening and
deepening of wetland rivers has reduced the value of these areas in slowing
the run-off of flood waters. This has resulted in the increase of peak
fresh water flows to coastal areas contributing to the die-off of coral
reefs.
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(iv) Fires
Wetlands are destroyed by fires some of
which are spontaneous, while some are deliberately set by humans.
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(v) Disruption of wildlife habitat
The operation of recreational (guided) tours
in wetlands like those being carried out in the Black River lower morass,
can have a disruptive effect on local wildlife if not properly controlled;
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3.0
GOVERNMENTS ROLE/RESPONSIBILITY AND RESPONSE
The conservation of wetlands can only be achieved
by the combined effort of individuals, communities, and government. Nevertheless
government must play a leading role in the proper management of these areas.
An understanding of the functions and uses of wetlands, as well as the
issues affecting wetlands is necessary in order to ensure the suastainable
use of these resources.
Government also has a wider responsibility
to conserve wetlands (especially those which are waterfowl habitats) as
a signatory to the Ramsar Convention on Wetlands of International Importance.
To fulfill these responsibilities with respect
to wetlands conservation, government has stated broad aims, to be achieved
by accomplishing certain specific goals. Also presented are the key principles
guiding the development of the specific policy strategies.
The mangrove and coastal wetlands protection
draft policy and regulation complements other coastal zone management initiatives
concerning coral reefs, mariculture, pipelines and conduits, marinas, and
protected areas.
The policy supports the Draft "Green Paper"
Proposals for a System of Protected Areas which identifies coastal habitats
and wetlands as among those resources and areas requiring protection. In
addition the policy supports the objectives of the National Environment
Policy which include providing for the protection and conservation of plants
and animal species, particularly endemic species.
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