WETLAND

By : Lee Chi Leung

Law Chung Yin

Kan Lai Man

Ngai Chung Mang

What are wetlands?

Wetlands are areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season.

Content

Role and importance of wetland The threat on wetland from human

activities Work done on the wetland conservation The importance of legislation and

education in wetland conservation

Maintenance of biodiversity

Wetlands are among the most productive ecosystems in the world, comparable to rain forests and coral reefs.

Wetlands play an integral role in the ecology of the watershed.

Wetland Function - Migration

Wetlands provide valuable stop-over sites for migratory birds. Wetlands are also necessary habitats for all waterfowl.

Ecotourism

Many wetlands are prime locations for tourism; some of the finest are protected as National Parks, World Heritage Sites, Ramsar sites, or Biosphere Reserves. Many wetland sites generate considerable income locally and nationally.

Environmental Education

Wetlands offer ideal locations for involving the general public and schoolchildren in hands-on learning experiences, in an essentially recreational atmosphere, to raise awareness of environmental issues.

Others

Flood Protection Shoreline Erosion Water Quality and Hydrology Wetland Function Natural Products for Our Economy Recreation and Aesthetics

Flood Control Wetlands act as protective natural Spon

ges by capturing, storing and slowly releasing water over a long period of time, thereby reducing the impact of floods.

Shoreline Erosion

The ability of wetlands to control erosion is so valuable that some states are restoring wetlands in coastal areas to buffer the storm surges from hurricanes and tropical storms.

Water Quality and Hydrology Wetlands have important filtering

capabilities for intercepting surface- water runoff from higher dry land before the runoff reaches open water.

Wetland Function - Habitat

Wetlands provide habitat for upland mammals such as deer and raccoons.

Wetland Function -Habitat

Wetlands provide habitat for wetland dependent species such as the salamander.

Natural Products for Our Economy ----Food Wetlands produce food that is beneficial

to humans. Examples are rice and cranberries

Natural Products for Our Economy ----Commercial Animal Populations

Wetlands provide humans with commercial animal populations.

Natural Products for Our Economy ----Fuel Peatlands are still used as production ar

eas.

Natural Products for Our Economy ----Timber/Fiber Production Wetlands are used as timber/fiber

production areas.

Recreation and Aesthetics

Wetlands are used as recreation sites all over the world.

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Economic development Urbanization Urbanization is a major cause of

impairment of wetlands. Urbanization has resulted in direct loss of wetland acreage as well as degradation of wetlands.

Construction activities are a major source of suspended sediments that enter wetlands through urban runoff.

Public facilities--Roads and bridges Roads and bridges Roads and bridges are frequently

constructed across wetlands since wetlands have low land value.

Roads can disrupt habitat continuity, driving out more sensitive, interior species and providing habitat for hardier opportunistic edge and non-native species.

Effluent from factory in Pearl Delta Reduction of wetland acreage Alteration of wetland hydrology due to

industrial water intake and discharge Water temperature increases Point and no point source pollutant inputs pH changes as a result of charges Atmospheric deposition.

Water pollution from factories

Most petroleum hydrocarbon inputs into coastal wetlands are from coastal oil industry activities

Oil can alter reproduction, growth, and behavior of wetland organisms

Oil can result in mortality Plants suffocate when oil blocks their

stomata

Atmospheric Deposition due to factories Chemical wastes and other organics

and in organics are released into the atmosphere by industrial

These compounds enter wetlands by winds from inland regions upstream of the Pearl Delta

The compounds adversely affect aquatic organisms and the terrestrial organisms that feed on them.

Disturbance of tourists

The tourists would make noisy during their visiting of wetland. This would fright away the birds in wetland.

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WWF (World Wide Fund) For Mai Po What Have they Done? wetland: Ramsar Sites in Mai Po are pr

otected by article 3 of convection. wetland conservation considerations

within government’s national land-use planning. They are required to formulate and implement this planning so as to promote

WWF (World Wide Fund) for Mai Po governments are urged to develop National

Wetland Policies in consultation with the local people.

Governments should also set up a National Wetland Committee to coordinate decisions on wetland use. Under the 'wise use' concept, human activity can be allowed in a Ramsar site, e.g. for fish farming, low intensity recreation etc., as long as the use is sustainable.

WWF (World Wide Fund) for Long Valley WWF Hong Kong raised the objection

against the KCRC's Spur Line Scheme in December 1999. WWF Hong Kong and the Hong Kong Bird Watching Society have jointly submitted a rezoning request to the Town Planning Board for rezoning Long Valley to "Conservation Area" in June 2000.

WWF (World Wide Fund) for Long Valley They also raised our strong objections

to the Director of Environmental Protection against the Spur Line EIA report in July 2000. To ensure our biodiversity would not be compromised by development, WWF Hong Kong will remain vigilant in the protection of Long Valley in its entirety

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The importance of legislation Clean Water Act – Wetlands are defined as “waters

of the United States” All dredging and filling of wetlands requires a Section 404 permit.

Swampbuster – Provision within the Farm Bill denying subsidies to farmers who drain and fill wetlands for agriculture.

Endangered Species Act – All agencies and citizens are entitled to enforce protection of wetlands that offer unique habitat for endangered species.

No Net Loss – Presidential Mandate calling for no net loss of wetlands.

Clean Water Action Plan – Calls for a net gain of 1,000,000 acres of wetlands per year beginning in 2000

The importance of education

Education can help enhancing students' understanding and awareness of our natural environment, emphasizing the importance of conservation for both wildlife and mankind.