Degrading Mangroves And Declining Pakistan Shrimp Industry Environmental Sciences Essay

This paper aims to depict the grounds of worsening runt industry in Pakistan and its extent peculiarly in association of degrading Rhizophora mangles woods in the old old ages. The Rhizophora mangles woods are the baby’s rooms for the runts and happened to be the beginning of gaining immense gross in fishing and runt industry. The debasement of Rhizophora mangles due to assorted grounds is taking to destructing the runt industry doing heavy losingss. Therefore, the paper will throw visible radiation on those multiple grounds along with the ensuing losingss in the runt industry and seek to develop some tendencies between the two parametric quantities. The information on one-year runt production and the rate of debasement of Rhizophora mangles will assist to develop those tendencies.


Mangroves are evergreen wood between land and sea.

We Will Write a Custom Essay Specifically
For You For Only $13.90/page!

order now

Mangroves of Pakistan are the largest woods of waterless clime in the universe. Mangroves are of import coastal resources, which are critical to our socioeconomic development by utilizing as fuel wood, fresh fish, building of houses and due to its economic value by exporting in the universe market. The alone ecosystem of Rhizophora mangle woods acts as natural shield and protects from hurricanes, utmost cyclones, tsunamis and big ocean. Deep rooting of the woods prevents from eroding. Due to alone home ground of brackish, saline, and boggy H2O, really rare species can digest.

Most of import is shrimp that use the muddy underside as their places. These woods play a really encouraging function as they protect shrimp by supplying nutrient, shelter, and engendering land. Shrimp are our chief piscaries export.Shrimp is a immense seafood industry in Pakistan, gaining more than 50 % of foreign exchange with shrimp export. There are two chief angling countries along the coastline, which is 1,050 kilometer long, and 40-50 kilometer broad, consisting state of Sindh and Baluchistan. Though, it constitutes of merely about 10 % of the fish production, is of much significance due to their value and demand in universe market.

The export of runt to different states is of worth over 1661 million rupees. Most of the runt is exported to the Japan, USA, UK, Singapore, and France. The demand for the runt in the foreign market is increasing but in Pakistan, its production is in a rapid diminution.

Shrimp industry has been worsening in a last decennary due to debasement of the Rhizophora mangle woods, which are the natural ecosystem for the runt.There are many factors responsible for the deforestation of Rhizophora mangles. Degradation of Rhizophora mangles has been increased with the industrial revolution. Significant increased marine H2O pollution from industries every bit good as over harvest home of Rhizophora mangles by autochthonal communities for wood and fresh fish and graze by farm animal are major causes of this loss. Another major factor is decrease in fresh H2O flows into the woods R has been due to set down usage alterations, industrial agribusiness, power coevals and increase in population. This decrease of fresh water has resulted in salt of the saltwater, which is damaging to mangrove growing and causes the depletion of shrimp resources in this procedure.

Shrimp industry is the anchor of the marine piscaries industries in Pakistan. Shrimp in the major fish trade good traded in value footings, accounting for approximately 19 % of the entire value of internationally traded piscary merchandises. ( Beginning: FAO ) Shrimp industry is besides of import with a domestic value 70 million US $ . Mangroves are the home ground of shrimp piscaries. Most of the commercial and revenue-producing runt trading operates on the Rhizophora mangle ecosystems. However, the debasement of the Rhizophora mangle has straight reduced the catchment country for shrimp production.

Sing the importance of Mangroves in the Pakistani economic system, it is imperative that immediate stairss are taken to halt the changeless impairment. By analyzing the root cause of the issue and its effects on the Shrimp Industry, likely solution can be determined that may impede the on-going devastation of one most of import economic and natural assets of Pakistan.

Literature reappraisal

A survey conducted by Amjad, A. Shah. , Kasawani, I. , and Kamaruzaman, J provides an overview of debasement of Rhizophora mangle woods at Indus delta in Pakistan. Mangroves are of import for their alone ecosystem. Indus delta Rhizophora mangles are the 7th largest country of the waterless clime of the universe.

It is dominated by rich biodiversity peculiarly Avicennia marina covers about 90 per centum of the Rhizophora mangle woods. Out of eight Rhizophora mangle species in the past merely four species have left. Mangrove forests support immense industry of piscaries and runt of deserving 4 billion rupees yearly. Over the class of 50 old ages, Indus delta Rhizophora mangles have been worsening quantitatively and qualitatively. The causes of debasement were found to be the decrease of fresh water due the recreation for agribusiness intents, commixture of industrial pollutants and overuse of woods by autochthonal community for fuel wood and fresh fish aggregation.Dr. Pamela Stedman-Edwards wrote a review paper on the survey conducted by a squad composed of economic expert, environmental expert, hydrologist, and sociologist. The survey investigates the root causes of biodiversity loss in the Rhizophora mangle ecosystem by comparing the Rhizophora mangle screen over a period of eight old ages utilizing Landsat images for two of the undertaking sites, Indus Delta and Sonmiani in Baluchistan.

A important decrease in the river H2O supply, overharvesting of Rhizophora mangles by the local communities, deposit, and coastal eroding are by and large considered to be the immediate causes of this loss. Survey shows that due to decrease of fresh H2O, over the last 50 old ages the salt of the saltwater has increased to 50 ppt, which is damaging to mangrove growing. At present, out of eight species merely three species of Rhizophora mangles exist in the Delta. Strong industrialisation sector in Karachi resulted an increased supply of untreated industrial wastewater and present a changeless menace to biodiversity. The rate of debasement of Rhizophora mangle woods in the Indus Delta has been estimated at 6 per centum between 1980 and 1995. At nowadays, merely 15 per centum of Rhizophora mangles here are considered healthy. ( Thompson and Tirmizi, 1995 )IUCN was carried out an extended survey on the present position of Rhizophora mangles, supplying the mention of the bing surveies on Rhizophora mangle woods. The survey country comprises the Rhizophora mangle forests widening from Jiwani to Sir brook on the Indo-Pakistan boundary line.

Study investigates environmentally sensitive Rhizophora mangle ecosystems are under heavy force per unit area due to the high rates of population growing. The coastal communities every bit good as the piscaries of the seashore are dependent on this ecosystem. Mangrove woods have considerable significance ecological and economic value due to their function in piscaries export. The critical flow of fresh H2O into the Rhizophora mangle ecosystem is to a great extent polluted by a assortment of industrial wastewaters, sewerage, and solid waste and nutrient-enriched irrigation H2O. IUCN-Pakistan have estimated that the Rhizophora mangle wood screen has decreased by 10 to 15 % in the last about twenty old ages because of decrease in fresh water flow.

( 1985 ) . Clearing of Rhizophora mangle countries for industrial and agricultural intents every bit good as for urban enlargement worsened the status. Avicennia marina occupies about 99.9 % of the entire forest country ( Qureshi, 1991, 1995 ) . Fisheries section and M/s Lipton Ltd.

initiated shrimp agriculture, which was a complete failure because the debauched environment of Rhizophora mangles did non back up shrimp production. Livestock graze, lopping, eroding and ecotourism are the other major factors of debasement.In one of the paper published by STREAM diaries, Ruzia Sultana wrote about the runt industry in Pakistan. The writer stated that runt is a major gross bring forthing industry of the Pakistan and has a critical function in the state ‘s economic system. The one-year runt gimmick from 1971-2003 ranged from 16,050 to 34,920 metric dozenss. The average gimmick for the past three decennaries was 25,541 ( ± 4,090 SD ) metric dozenss. The major gimmick country of the runt is southern seashore of Karachi seashore and Baluchistan seashore. There are different types of runt piscaries, classified based on colourss and their sizes.

The writer analyzed the diminution of runt by doing a comparing of continuance from 1971 to 2003. The causes of diminution mentioned by the writer were debasement and overuse of natural ecosystem, which are considered as the baby’s room of runt. This state of affairs is taking to nutrient shorten besides due to hapless direction and other land developmental activities.Amjad, A. Shah with his co-worker worked on the Rhizophora mangle preservation through the engagement of the community. The writer described about the alone waterless clime of the Indus Delta mangroves that are economically and ecologically important.

More than 95 percent local community of Sonmiani Bay is dependent on Rhizophora mangles for their support in fishing sector, fuel wood, fresh fish and farm animal graze. Shrimping is the major industry of Pakistan at Karachi. The chief gimmick of runt is located at Sonmiani Bay. However, the Rhizophora mangles, the back uping ecosystem of life has been degrading for last few decennaries. The immediate factors are population force per unit area for fuel wood and fresh fish aggregation, recreation of fresh H2O from Indus River for other intents of agribusiness and power coevals, industrial pollutants. The debasement of Rhizophora mangle ecosystem has exposed to severe environmental and societal emphasis in the signifier of loss of home ground and biodiversity, diminution in fish productiveness and societal jobs for coastal communities.The Government of Pakistan ( Environment and Urban Affairs Division ) prepared this paper in coaction with IUCN – The World Conservation Union ; Dr.

Nasim Akhter the writer mentioned the piscary industry of Pakistan that has a important function in economic system. The writer stated that runt is backbone of the fish industry gaining 80 per centum of the foreign exchange. However, the cut downing Rhizophora mangle screen is the major factor in diminution of the shrimp production as Rhizophora mangles provide the home ground to many piscaries and runt. The major causes to the Rhizophora mangles debasement are urban enlargement, fuel wood extraction and commixture of chemicals from industries that has besides posed menaces to the future runt industry.


Indus Delta Rhizophora mangles are economically and ecologically important ecosystem holding the largest alone waterless clime in the universe, busying 600,000 hour angle of the seashore of the Pakistan. Mangroves are the genteelness land and baby’s room for runt. Shrimp piscaries are the major gross bring forthing industry of the Pakistan.

Eighty per centum of the grosss of the state come from the runt industry.Degradation of Rhizophora mangles over the 50 old ages has reached up to an alarming phase, there were merely 86-90,000 hectares left out of 600,000 hour angle. An estimation determined show the mangrove country of Pakistan seashore as 345,000 hour angle in 1980 ( FAO, 2005 ) which declined by 54 % to 159,000 hour angle in 2005. A deep analysis shows that the major causes of qualitative and quantitative loss of Rhizophora mangle screen in Pakistan are recreation of flow of fresh H2O from Indus River, overuse by the local communities for fuel wood and fresh fish aggregation, industrial pollutants.The lone beginning of fresh H2O supply for Indus delta is Indus River.

The decrease of floe of fresh H2O is the major factor of debasement of Rhizophora mangles. The fresh H2O available to the delta is 150 MAF that has been reduced to the lone 35 MAF.The MAF of Indus into the deltaThe decrease of fresh H2O has created the job of increased salt, which is damaging for the growing of the Rhizophora mangle woods and resulted in diminution some sort of runt piscaries.This decrease is due to recreation of H2O for agricultural intents and power coevals.

Expansion of the agricultural land is due to the population force per unit area. Urbanization is another procedure for turning metropolis of Karachi. More land renewal is being under procedure for other developmental constructions. Dam and barrages building on the Indus is to carry through the economic and developmental activities. Damning has increased the burden of deposits by the unequal distribution of H2O in to the delta particularly during inundations. Silt discharge is estimated to be 100 million dozenss per twelvemonth. This has inflicted heavy losingss on the ecology and biodiversity of the Indus Delta Rhizophora mangles.

The policy-making establishments have the precedences of gross production alternatively of natural resources preservation. Harmonizing to The Water Accord 1991 fresh water will flux into the sea in order to keep the ecological balance of the Rhizophora mangle woods. However, this act is non met in fact is lower.Pollution is another proximate beginning of debasement of Indus Delta Rhizophora mangles. Karachi is hub of industries. Land clearance for industries and other substructures resulted diminution of Rhizophora mangle screen more quickly.

These developments have increased the urbanisation procedure taking to the hebdomad urban planning. Untreated industrial every bit good as domestic wastewaters and run off from agribusiness are the major causes of pollution. Industrial wastewater can be included lead, quicksilver and other heavy stuffs. Run off fertilisers and pesticides causes eutrophication resulted high runt piscaries mortality. Oil pollution in Karachi seaport is the most baleful for the Rhizophora mangle as oil prevents the entree of O to the roots doing the decease of workss by asphyxiation.

Harmonizing to an estimation 20.000 dozenss of the oil finds manner to the Rhizophora mangle doing the devastation runt genteelness land. The building of the LBOD was proved to be a catastrophe to the Rhizophora mangle forest debasement due to the technically incorrect design. Alternatively of drain, effluents into the sea it turned towards the Rhizophora mangle ecosystem resulted in heavy loss.

Another major factor of debasement of Rhizophora mangle wood is overexploitation by the local communities. Most of the communities around the Rhizophora mangle wood are hapless, so forced to utilize the natural resources. Natural resources of this ecosystem are harvested by the local communities for a assortment of intents such as for wood fuel, fodder aggregation. More than 95 per centum of the community has the lone beginning of support is angling.

Shrimp industry is the anchor of the marine piscaries industries in Pakistan. Shrimp in the major fish trade good traded in value footings, accounting for approximately 19 % of the entire value of internationally traded piscary merchandises. ( Beginning: FAO ) Shrimp industry is besides of import with a domestic value 70 million US $ . Mangroves are the home ground of shrimp piscaries. Most of the commercial and revenue-producing runt trading operates on the Rhizophora mangle ecosystems.

However, the debasement of the Rhizophora mangle has straight reduced the catchment country for shrimp production.Fig. 2 Value US $ / KG. Pakistan shrimp exports 1990- 2003Presented informations suggests that runt gimmick is far less for its production due to overuse as discussed earlier different causes of debasement.

Shrimp industry of Pakistan is under heavy menace of acute debasement of Rhizophora mangles as runt ‘s baby’s room. Human population of 900,000 shacking Indus Delta is hapless community. More than 135,000 people depend on the Rhizophora mangle resource on the fishing as their chief beginning of support.

Most of the community is hapless so they use the natural resources because they have no other surrogate.Mangroves are of import ecosystem ecologically and economically. They protect eroding at the coastline, cut down the strength of cyclones, back up the rich biodiversity and service as baby’s rooms for fish and runt.

Therefore, it is necessary to protect the Indus Delta for equilibrating the natural ecosystem services, for the support of the population depend upon the Rhizophora mangles and important part to the national economic system by increasing the runt trading.Some Measures should be taken to halt saltwater invasion into the river and the deltaMinimum measure of river flow downstream Kotri must be ensured.The stakeholders and the little fishermen want that the conditions that prevailed before the building of the dikes and bombardments be revived.Mangroves need to be managed and conserved so concerned bureaus, authorities sections and NGO ‘s are taking stairss in this respect, like new Rhizophora mangle baby’s rooms near Karachi. They should form consciousness plans for local communities on the significance of Rhizophora mangles for support and by carrying them to take an active portion in conserving the Rhizophora mangles.

Decision doing establishments should explicate holistic policies that can guarantee preservation of Rhizophora mangles and its biodiversity and sustainable direction should be assured for sustainable support and environment. The 1991 Water Accord should be efficaciously implemented. For the control of the industrial and domestic pollution intervention workss should be installed before let go ofing into the destructing natural ecosystem of Rhizophora mangles.

Procedure of irregular rapid urbanisation should be curtailed and must be considered by the metropolis planning bureaus.


I'm Ruth!

Would you like to get a custom essay? How about receiving a customized one?

Check it out