COASTAL ZONE/AREA PROFILE OF
HABITAT AND ECOSYSTEM APPROACH
1. THEORETICAL BACKGROUND OF WETLANDS, LAGOONS AND BEACHES
a. Wetland Biological and Ecological Functions
Wetlands are among the most productive ecosystems in the world, comparable to rain forests and coral reefs. An immense variety of species of microbes, plants, insects, amphibians, reptiles, birds, fish, and mammals can be part of a wetland ecosystem. Physical and chemical features such as climate, landscape shape (topology), geology, and the movement and abundance of water help to determine the plants and animals that inhabit each wetland. The complex, dynamic relationships among the organisms inhabiting the wetland environment are referred to as food webs.
Wetlands provide great volumes of food that attract many animal species. These animals use wetlands for part of or all of their life-cycle. Dead plant leaves and stems break down in the water to form small particles of organic material called "detritus." This enriched material feeds many small aquatic insects, shellfish, and small fish that are food for larger predatory fish, reptiles, amphibians, birds, and mammals.
The biological, chemical, and physical operations and attributes of a wetland are known as wetland functions. Some typical wetland functions include: wildlife habitat and food chain support, surface water retention or detention, groundwater recharge, and nutrient transformation. Distinct from these intrinsic natural functions are human uses of and interaction with wetlands. Society's utilization and appraisal of wetland resources is referred to as wetland values, which include: support for commercially valuable fish and wildlife, flood control, supply of drinking water, enhancement of water quality, and recreational opportunities.
A watershed is a geographic area in which water, sediments, and dissolved materials drain from higher elevations to a common low-lying outlet, basin, or point on a larger stream, lake, underlying aquifer, or estuary. Wetlands play an integral role in the ecology and hydrology of the watershed. The combination of shallow water, high levels of nutrients, and high primary productivity is ideal for the growth of organisms that form the base of the food web and feed many species of fish, amphibians, shellfish, and insects. Many species of birds and mammals rely on wetlands for food, water, and shelter, especially during migration and breeding. Wetlands' microbes, plants, and wildlife are part of global cycles for water, nitrogen, and sulfur. Furthermore, scientists are beginning to realize that atmospheric maintenance may be an additional wetlands function. Wetlands store carbon within their plant communities and soil instead of releasing it to the atmosphere as carbon dioxide. Thus wetlands help to moderate global climate conditions.
Water Quality
Wetlands have important filtering capabilities for intercepting surface water runoff from higher dry land before the runoff reaches open water. As the runoff water passes through, the wetlands retain excess nutrients and some pollutants, and reduce sediment that would clog waterways and affect fish and amphibian egg development. In addition to improving water quality through filtering, some wetlands maintain stream flow during dry periods, and many replenish groundwater.
Flood Protection
Wetlands function as natural sponges that trap and slowly release surface water, rain, snowmelt, groundwater, and flood waters. Trees, root mats, and other wetland vegetation also slow the speed of flood waters and distributes them more slowly over the floodplain. This combined water storage and braking action lowers downstream flood heights and reduces erosion. Wetlands within and downstream of urban areas are particularly valuable, counteracting the greatly increased rate and volume of surface water runoff from pavement and buildings. The holding capacity of wetlands helps control floods. Preserving and restoring wetlands can often provide the level of flood control otherwise provided by expensive dredge operations and levees.
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. Wetlands at the margins of lakes, rivers, bays, and the ocean protect shorelines and stream banks against erosion. Wetland plants hold the soil in place with their roots, absorb the energy of waves, and slow the flow of stream or river currents along the shore.
Fish and Wildlife Habitat
More than one-third of the population mainly in the
(http://www.mass.gov/czm/waecofun.htm)
b. General Ecology of Lagoons
High nutrient concentrations are often present in Lagoons as a result of both riverine nutrient inputs and effective nutrient recycling between the sediments and the water column. Lagoons are, therefore, often highly productive aquatic environments. A comparison of productivity land biomass estimates for lagoons around the world (Barnes, 1980) clearly indicates that Lagoons are characterized by exceptionally high productivity and biomass, compared to other aquatic ecosystems.
The following features provide lagoons with their distinctive characteristics.
· the high degree of shelter from tidal and current action;
· the relatively stable salinity gradients;
· the soft mud and/or sand substrates;
· the well-mixed nature of the water column through wind action;
· extreme shallowness;
· organic richness;
· rapidity with which they change (over geological time scales);
In climates with seasonal rainfall, and where major inputs of freshwater exist a pronounced seasonal variation in salinity and/or water level. In comparison with estuaries, contributions of phytoplankton and submerged macrophytes in lagoons are more important in production processes. Most of the production is consumed within the system, and there is less export of nutrients and organic material due to the closed nature of lagoons and of the unimportance of tidal fluxes. Carbon sources include phytoplankton, ;benthic and epiphytic algae and detritus derived from macrophytes. The latter detrital source is especially important as a source of carbon. The pond weed, Potamogeton ppectinatus decays very rapidly within the lagoon environment. Studies by Howard-Williams and Davies (1979, cited by Barnes 1980) suggest that under environmental conditions of 15-260 C temperature and 5-11 ppt salinity, most nutrient release from Potamogeton occurred during its first week of decay, and decay processes very largely complete within 128 days. Within lagoons, detrital enrichment via bacterial heterotrophs is the dominant trophic pathway supplying energy to biological consumers.
Most of the consumers are thought to acquire detritus, benthic algae and epiphytes in an indiscriminate fashion via deposit feed and/or browsing. Among vertebrates within lagoons (both birds and fish) most species are opportunistic omnivores or carnivores.
In summary, lagoons are extremely productive environments due largely to high nutrient inputs from surrounding land drainages, as well as efficient nutrient re-cycling. This high productivity supports lagoon fisheries for both fish and shell fish. Lagoons are ephemeral environments (on geological time scales) evolving rapidly into other types of semi-aquatic, habitats (marshes, swamps). Simultaneous with this succession is a gradual shift from high salinity conditions to freshwater. Human activities within lagoon watersheds often serve to increase the succession rate of lagoons towards their ultimate terrestrial end-state.
o the high degree of shelter from tidal and current action;
o the relatively stable salinity gradients;
o the soft mud and/or sand substrates;
o the well-mixed nature of the water column through wind action;
o extreme shallowness;
o organic richness;
o rapidity with which they change (over geological time scales);
o in climates with seasonal rainfall, and where major inputs of freshwater exist a pronounced seasonal variation in salinity and/or water level.
In comparison with estuaries, contributions of phytoplankton and submerged macrophytes in lagoons are more important in production processes. Most of the production is consumed within the system, and there is less export of nutrients and organic material due to the closed nature of lagoons and of the unimportance of tidal fluxes. Carbon sources include phytoplankton, benthic and epiphytic algae and detritus derived from macrophytes. The latter detrital source is especially important as a source of carbon. The pond weed, Potamogeton ppectinatus decays very rapidly within the lagoon environment. Studies by Howard-Williams and Davies (1979, cited by Barnes 1980) suggest that under environmental conditions of 15-260 C temperature and 5-11 ppt salinity, most nutrient release from Potamogeton occurred during its first week of decay, and decay processes very largely complete within 128 days. Within lagoons, detrital enrichment via bacterial heterotrophs is the dominant trophic pathway supplying energy to biological consumers.
Socio-economic Characteristics, Issues and Community Dependence on the
The complex mix of resources in and around the Lakes, lagoons, water, fish, land, forests and fauna, have an interrelated effect on community life. It is difficult to precisely arrive at a geographical area, and consequently, at the communities which should be included in a resource management plan for the lakes and lagoons. More specifically, farm land, mostly paddy fields, is spread all around the Lakes/lagoons and irrigation water with pesticides like Thimet and Ecalux and fertilizers drain straight into the Lakes/lagoons. Three distinct communities can be identified as having crucial linkages to the Lakes and lagoons and its resource management:
a. the fishermen (traditional and non-traditional),
b. the farmers who live around the lake/lagoons, and
c. those who depend on the forest resources in the Lake/lagoon catchment area for both their livelihood and to meet their fuel/timber requirements.
c. Beaches Ecology and Habitat
Beach is a geological landform along the shoreline of a body of water. It usually consists of loose particles which are often composed of rock, such as sand, gravel, shingle, pebbles, or cobble. The particles of which the beach is composed can sometimes instead have biological origins, such as shell fragments or coralline algae fragments.
Beaches often occur along coastal areas, where wave or current action deposits and reworks sediments.
Although the seashore is most commonly associated with the word "beach", beaches are not only found by the ocean: beaches also occur at the margin of the land along lakes and rivers where sediments are reworked or deposited.
· small systems in which the rock material moves onshore, offshore, or alongshore by the forces of waves and currents; or
· geological units of considerable size.
A beach habitat is an unstable environment which exposes plants and animals to changeable and potentially harsh conditions. Some small animals burrow into the sand and feed on material deposited by the waves. Crabs, insects and shorebirds feed on these beach dwellers. The endangered Piping Plover and some tern species rely on beaches for nesting. Sea turtles also lay their eggs on ocean beaches. Seagrasses and other beach plants grow on undisturbed areas of the beach and dunes.
Ocean beaches are habitats with organisms adapted to salt spray, tidal overwash, and shifting sands. Some of these organisms are found only on beaches. Examples of these beach organisms in the southeast US include plants like sea oats, sea rocket, beach elder, beach morning glory aka Ipomoea pes-caprae, and beach peanut, and animals such as mole crabs aka Hippoidea, coquina clams aka Donax, ghost crabs, and white beach tiger beetles.
Socio-economic Characteristics, Issues and Community Dependence on Beaches in in the
Main resources
The principal stocks exploited in the
Small pelagic (surface- and mid-water-dwelling) fishes as a group comprise predominantly roundscads (Decapterus spp., Carangidae), anchovies (Stolephorus spp., Engraulidae), sardines (Sardinella spp., Clupeidae) and mackerels (Rastrelliger spp., Scombridae). Also included in this group are the round herrings (Clupeidae), flying fishes (Exocoetidae) and halfbeaks (Hemiramphidae).
The small pelagic fisheries comprise an important segment of the country’s fisheries industry. Small pelagics are considered the main source of inexpensive animal protein for lower-income groups in the
The large pelagic fishes consist of tunas and tuna-like species, such as billfish, swordfish and marlin. The tuna fisheries became the largest and most valuable fisheries in the
Fishermen communities and dependence in the Philippines
Municipal fisherfolk are considered the “poorest among the poor”. In 2000, households whose heads were fishers had a significantly higher poverty incidence than households in general. Their daily income was roughly the retail value of 2 kg of fish. Low incomes can be attributed to declining fish catch, estimated to be about 2 kg per day, down from the 20 kg per day that was the average catch during the 1970s.
Households of fishers and those in the fishing industry also had heads with relatively lower education levels compared with households in general. Fishers’ households had lower access rates to basic necessities like safe water, sanitary toilets and electricity than other households, and were more likely to live in makeshift houses or were squatting. Also, the average size of households of fishers and of those in the fishing industry was greater than the national average (
According to the 2002 Census of Fisheries, there were 1.8 million municipal and commercial fishing operators. This was a three-fold increase from the 584 000 fishing operators recorded in 1980. Municipal fishing dominated the fishing industry in terms of numbers of operators. In 2002, 1.78 million operators (99.6%) were engaged in municipal fishing compared with only 7 800 in commercial fishing operations.
The vast majority of municipal fishing operations (1.752 million or 98.4%) were individual operations. At 1.7 million, male operators accounted for 94.5% of the municipal fishing operators, with a median age of 41 years.
In 2002, out of 7 200 commercial fishing operations, 7 190 were operated by individuals, and almost all (98.6%) were males, with a median age of 39 years.
Women have a role in fisheries and helping in the livelihood of the family (Siason, 2004). Their roles include: (1) fish marketing or vending, (2) fish processing, (3) fry gathering, (4) gear preparation, (5) fishing, (6) net mending, and (7) fishing boat ownership and operation.
Economic Role of Fisheries in the National Economy
In 2003, the fisheries sector had a total value of US$ 1 832 million, accounting for 2.2% of GDP. The
However, globally in the last 20 years, the
Demand
Fish demand is robust in the
- Domestic human consumption is by far the largest single use (2 335 474 t in 2003). The most important species consumed are roundscad, Indian sardines, frigate tuna, big-eyed scad, fimbriated sardines and anchovies, which originate from marine waters and are augmented by imports and milkfish and tilapia from aquaculture and inland fisheries.
- Fish exports are the second largest use of supply (155 129 t in 2003). The main exported products are tuna, which originate from commercial and municipal marine fisheries, and shrimp from aquaculture.
- The smallest portion of demand (332 268 in 2003) is for non-food uses. This consists mainly of imported fishmeal for animal feeds, and snails caught in inland waters for duck feed.
The supply divides as about 83% for human consumption and 17% for exports and non-food uses.
2. STRUCTURE/COMPOSITION/LOCATION
A. Geography
B. Topography
The terrain is generally sloping from shorelines, gradually becoming hilly and mountainous towards the center of the peninsula. There are some flat lands, most of which are narrow strips along the east coast. The urban center is generally flat with getle slope to the interior, having recorded elevation of 1,346 meters.
The mountains towards the center elevates as high as 1,028 meters but not less than 500 meters above sea level. These are formed due to subsequent upliftment by tectonic stresses that produce high relief landscape. Their slope range from steep to severely dissected mountain ranges. Erosion and landsliding are the main processes taking place in the area.
C. Climate
The highest rainfall occurs on the month of June with 273.4 mm while the lowest rainfall falls on the month of March with 11.9 mm. The average annual rainfall is 96.4 millimeters.
D. Ethnic Groups
The city's population consists predominantly of Chavacano speaking Zamboanguenos who comprises 44.7%. Hence, Chavacano is considered the mother tongue. The Visayans/Cebuanos rank next with 20.79%, followed by Tausogs, 14.94%; Samals, 6.53%; Tagalogs, 3.80%; Ilongos, 2.17%; Yakans, 2.10% and other groups, 5.20%.
E. Resources
Agriculture. TTWith the geographic location and climate condition of the city, agricultural production is generally favorable. Crops production such as coconut, banana, mango among others continuous to increase, 5% in 2003 and 7% in 2004. Rice and corn productions showed an opposite trends. Although rice production declined 12% in 2002-2003, it slightly increased by 4% last year. Corn production on the other hand, had increased by 5% in 2002-2003 and decreased last year by 4%. The devastating effect of El Niño and La Niña for the past years and conversion of agricultural lands to other uses mainly contributed to its production performance. Nevertheless, the city government, in order to increase its major crops in the city, tries to provide support services like farm-to-market roads, post harvest facilities, farm machinery and equipment and even research and development support.
Livestock & Poultry. TTLivestock and poultry production which is composed of hog, chicken, cattle, carabao, ducks and goat, showed an irregular trend, an increase of 10% in 2002-2003 and a negative rate of 6.4% last year. Various programs and strategies were implemented and more are lined up by the Department of Agriculture, City Agriculturist Office and other government and non-government organizations.
Fishing. TTFishing production is getting more productive despite of numerous intrigues. It is composed mainly of municipal and commercial fishing and it continued to grow by 7% in 2002-2003 and 2% in 2003-2004. Production for aquaculture and seaweeds farming had an erratic movement. In 2002-2003, both productions decreased, 29% for seaweed farming and 28% for aquaculture. Fortunately, last year both seaweed farming and aquaculture posted an increased of 28% and 27% respectively. This is a good sign for those involve in fishing, it only shows the increasing demand of the produce.
F. Economy
There had been an increase of exporters for the past years dealing mostly with marine products and agricultural products.
Although the city’s export performance had increased in 2002 and 2003, sadly it dropped by 25% last year. In the city, there are six (6) major industries, there are processed aqua-marine products, processed food, coconut-based poducts, gifts, toys & housewares, furnitures & wood products and fruits. Many political, social and economic factors had contributed to this poor performance like low demand and price of products in the worl market.
The top five main agri-fishery-industrial products experted for 2004 are octopus, canned tuna, assorted frozen marine products, dried seaweeds and coconut oil. Countries like
3. STATUS OF USES/EXPLOITATION
Fisheries Production
Global Production
This database contains the volume of aquatic species caught by country or area, by species items, by FAO major fishing areas, and year, for all commercial, industrial, recreational and subsistence purposes. The harvest from mariculture, aquaculture and other kinds of fish farming is also included.
|
This database contains the annual volume of aquatic species caught by country or area, species items and FAO major fishing areas for all commercial, industrial, recreational and subsistence purposes.
|
This database contains statistics on production volume and value price per kilogram by species, country or area, fishing area and culture aquatic environment.
4. PROBLEM MANAGEMENT ISSUES AND RELATED CONCERNS
Management applied to the main fisheries
In the
- open access;
- overfishing and excessive fishing pressure;
- lack of management;
- inappropriate exploitation patterns;
- post-harvest losses;
- small- and large-scale fisheries conflicts;
- habitat degradation;
- lack of research and information; and
- inadequacy of technical and human resource capabilities, particularly among managers and the agencies concerned in analysing fisheries
In February 1998, the Philippine Fisheries Code (Republic Act 8550) was signed into law. The Code consolidates all laws pertaining to the fisheries sector and repeals or modifies previous statutes that are inconsistent with it. It declares as a state policy that achieving food security is the main consideration in the development, management, and conservation of fisheries and aquatic resources. Its provisions reflect a strong adherence to long-term sustainability, fully recognizing its multiple dimensions and complex elements in the fisheries context through several prohibitive and regulatory measures seeking to balance protection with reasonable and responsible use (Ingles, 2004b).
Earlier, in 1991, the Local Government Code (LGC) devolved authority over the management of municipal waters to Local Government Units (LGUs) within the parameters set by national fisheries legislation and policies.
The establishment of Fisheries and Aquatic Resources Management Councils (FARMCs) at the national, provincial and municipal levels has established a legal commitment by the government to involve stakeholders in the development and management of the fisheries industry.
The Government of the Philippines’ most significant policy shift in the past decade has been the introduction of joint management mechanisms of the fisheries sector, involving both the central government and the municipalities, and the government and the fishers (through the FARMCs). The Philippine Community-Based Coastal Resource Management (CB-CRM) programme has been very successful at awareness building, with notable pockets of success in implementation. The
Silvestre and Pauly (2004) outlined seven main categories of management intervention that the authors believed to be appropriate, given the status of coastal fisheries in the developing countries of
1) Limited entry and effort reduction.
2) Gear, area and temporal restrictions.
3) Improvement of marketing and post-harvest facilities.
4) Enhancement of awareness and participation of stakeholders.
5) Reduction of environmental impacts.
6) Institutional strengthening and upgrading.
7) Enhancement of research and information.
Some of the fisheries management measures in the
Limited entry and effort reduction
Licensing in the
Gear, area and temporal restrictions
Measures influencing composition of catches in terms of species and size, and to a certain extent the sex and maturity stage, include: (1) technological controls or limitations, e.g. gear restrictions, including mesh regulations, hook size control and trawl bans; (2) spatial restrictions, e.g. marine sanctuaries and area closures; and (3) temporal restrictions, e.g. seasonal closures.
Table 4. Examples of regulatory instruments influencing selectivity of fishing operations in the
Food Security
Bernacsek (1996), writing on the role of fisheries in food security in the
“There are clear indications that fisheries quantity production is approaching real limits to further growth. Government of the
Constraints
In their 2004 paper, Luna et al. identified the following issues confronting Philippine marine fisheries today:
- depleted fishery resources;
- degraded coastal environment and critical fisheries habitats;
- low catches and incomes, and dissipated resource rents;
- physical losses and reduced value of catches due to improper post-harvest practices and inefficient marketing;
- inequitable distribution of benefits from resource use;
- intersectoral and intrasectoral conflicts;
- poverty among small-scale fishers; and
- inadequate systems and structures for fisheries management.
Open access is one of the main interconnections among all the issues identified.
5. MANAGEMENT INTERVENED FOR THE ECOSYSTEM
Development Prospects and Strategies
Luna et al. (2004) recommended six critical actions to reverse the decline in Philippine marine fisheries:
- reduction and rationalization of fishing effort;
- protection, rehabilitation and enhancement of coastal habitats;
- improved utilization of harvests;
- enhanced local stewardship and management of resources;
- supplemental and alternative livelihoods for fishers; and
- capacity building and institutional strengthening.
On the proposed re-structuring of the aquaculture subsector into an efficient and sustainable agribusiness, Bernacsek (1996) recommended that the Government of the
Research
The Philippine Fisheries Code of 1998 provides for the creation of a National Fisheries Research and Development Institute (NFRDI), to serve as the primary research arm of BFAR. The major project of the interim NFRDI is the National Stock Assessment Project, which has been designed to institutionalize stock assessment so that continuous and reliable time series data will be available for the development of sound fisheries management strategies.
State universities, such as the University of the
For aquaculture, the presence of the Southeast Asian Fisheries Development Center Aquaculture Department (SEAFDEC AQD) in the
SEAFDEC AQD has the following ongoing programmes: (1) Broodstock and Seed Quality Improvement; (2) Sustainable Aquaculture Technologies; (3) Collaborative R&D Programme with Philippine’s DA-BFAR; (4) SEAFDEC-JIRCAS Collaborative Programme; (5) Promotion of Mangrove-Friendly Aquaculture in Southeast Asia; (6) Fish Diseases Diagnostic Methodologies for Aquaculture; (7) Aquaculture for Rural Development; and (8) Supply of Good Quality Seed.
Fisheries R&D is being coordinated (and funded to some extent) by the Philippine Council for Aquatic and Marine Research and Development Council under the Department of Science and Technology and the Bureau of Agricultural Research under the Department of Agriculture.
The other state universities engaged in aquaculture R&D include the Central Luzon State University (CLSU) and Mindanao State University (MSU).
BFAR has several aquaculture centres and stations throughout the country, which provide aquaculture extension services.
Some private companies (e.g. feed companies) also engage in aquaculture research and extension.
The Philippine fisheries industry is currently preparing a Comprehensive National Fisheries Industry Development Plan (CNFIDP), and among the issues that have been raised are the inadequate programmes of R&D and Extension, and lack of commercial impact. The causes include: (1) limited government funding; (2) limited investment by the private sector; (3) lack of awareness of commercial realities among too many researchers and extension workers; and (4) the blinkered focus of many researchers – too focused on basic research and too publication-oriented. This situation results in: (1) poor adoption of new technologies by industry; (2) loss of competitiveness with other animal farming industries and in the export market; and (3) wastage of valuable R&D and Extension resources. The proposed solution includes: (1) focusing government programmes of R&D and Extension towards immediate needs of the aquaculture sector; and (2) increasing R&D and Extension investments from the private sector.
Education
There are several state universities and colleges engaged in fisheries education in the country. However, only a few (e.g. CLSU, UPV and MSU) have been recognized to have significantly contributed to fisheries education and R&D in the country.
All educational institutions in fisheries are supported by the state. There are more than 40 state colleges and schools of fisheries under the aegis of the Commission on Higher Education (CHED), with seven under the Technical Education and Skills Development Authority (TESDA) (Juliano, 2004).
Foreign Aid
Foreign assistance in the form of loans and grants shifted more to conservation and resource management after the late 1980s.
An ongoing major fisheries project, Fisheries Improved for Sustainable Harvest (FISH) Project, builds upon the foundation and lessons learned from the USAID-funded Coastal Resource Management Project (CRMP) and other projects to achieve the next crucial benchmark in managing fisheries and coastal resources in the
The FISH Project is a seven-year (2003–2010) technical assistance project funded by USAID and implemented in partnership with BFAR, other national government agencies, LGUs and non-governmental (NGO) and other assisting organizations. The FISH Project activities focus on four target implementation areas:
FISH is expected to result in a 10% increase in fish stocks by 2010 in the four target implementation areas. To achieve this, national and local activities will be implemented to build capacity, improve the national policy framework and develop an informed constituency for fisheries management.
The Philippine fisheries sector continues to need external assistance, particularly for capacity building.
No comments:
Post a Comment