Multispectral mapping of the impact of shrimp farming pools on the mangrove ecosystem of the gulf of Guayaquil, Ecuador

This study aims to describe the profile of vegetation diversity in the mangrove ecosystem in Tamuku Village, Bone-Bone-Bone District, North Luwu Regency. This research is a qualitative research using survey methods. The data collection technique uses the Quadrant Line Transect Survey technique. The data analysis technique uses the thinking flow which is divided into three stages, namely describing phenomena, classifying them, and seeing how the concepts that emerge are related to each other. The results of this study are the profile of mangrove vegetation in Tamuku Village, which is still found 16 varieties of true mangrove vegetation and 7 varieties of mangrove vegetation joined in the coastal area of Tamuku Village, Bone-Bone District, North Luwu Regency, South Sulawesi. The condition of mangrove vegetation in Tamuku Village is currently very worrying due to human activities that cause damage such as the project of normalization of flow, opening of new farms, disposal of garbage, water pollution due to chemicals, and exploitation of mangrove forests for living needs. The impact is ecosystem damage and reduced vegetation area as a place to grow and develop mangroves.

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Coastal Mangrove Response to Marine Erosion: Evaluating the Impacts of Spatial Distribution and Vegetation Growth in Bangkok Bay from 1987 to 2017

Remote Sensing ◽

10.3390/rs12020220 ◽

2020 ◽

Vol 12 (2) ◽

pp. 220 ◽

Cited By ~ 2

Author(s):

Han Xiao ◽

Fenzhen Su ◽

Dongjie Fu ◽

Qi Wang ◽

Chong Huang

Keyword(s):

Spatial Distribution ◽

Vegetation Index ◽

Normalized Difference Vegetation Index ◽

Mangrove Ecosystem ◽

Early Growth ◽

Growth Stages ◽

Human Disturbances ◽

Vegetation Growth ◽

Two Parameters ◽

The Impact

Long time-series monitoring of mangroves to marine erosion in the Bay of Bangkok, using Landsat data from 1987 to 2017, shows responses including landward retreat and seaward extension. Quantitative assessment of these responses with respect to spatial distribution and vegetation growth shows differing relationships depending on mangrove growth stage. Using transects perpendicular to the shoreline, we calculated the cross-shore mangrove extent (width) to represent spatial distribution, and the normalized difference vegetation index (NDVI) was used to represent vegetation growth. Correlations were then compared between mangrove seaside changes and the two parameters—mangrove width and NDVI—at yearly and 10-year scales. Both spatial distribution and vegetation growth display positive impacts on mangrove ecosystem stability: At early growth stages, mangrove stability is positively related to spatial distribution, whereas at mature growth the impact of vegetation growth is greater. Thus, we conclude that at early growth stages, planting width and area are more critical for stability, whereas for mature mangroves, management activities should focus on sustaining vegetation health and density. This study provides new rapid insights into monitoring and managing mangroves, based on analyses of parameters from historical satellite-derived information, which succinctly capture the net effect of complex environmental and human disturbances.

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Mapeamento e identificação de vetores responsáveis pela supressão do manguezal na Zona Costeira do Baixo Sul da Bahia, Brasil (Mapping and identification of vectors responsible for mangrove suppression in the Southern Bahia Lowlands, Brazil)

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v12.7.p2503-2521 ◽

2020 ◽

Vol 12 (7) ◽

pp. 2503

Author(s):

Ana Paula Sena de Souza ◽

Ivonice Sena de Souza ◽

George Olavo ◽

Jocimara Souza Britto Lobão ◽

Rafael Vinícius de São José

Keyword(s):

Urban Areas ◽

Satellite Image ◽

Mangrove Ecosystem ◽

Shrimp Farming ◽

Mangrove Forests ◽

Coverage Area ◽

Southern Bahia ◽

Global Accuracy ◽

Landsat Satellite ◽

Accuracy Indices

O ecossistema manguezal representa 8% de toda a linha de costa do planeta ocupando uma área total de 181.077 km2. O Brasil é o segundo país em extensão de áreas de manguezal, ﬁcando atrás apenas da Indonésia. O objetivo do presente estudo foi mapear e identificar os principais vetores responsáveis pela supressão da cobertura das áreas de manguezal na região do Baixo Sul da Bahia, Brasil, a partir de imagens de satélite Landsat disponíveis para o período entre 1994 e 2017. Os mapeamentos foram realizados a partir de classificação supervisionada, utilizando o método Maxver. A acurácia da classificação obtida foi verificada através da verdade de campo, de índices de Exatidão Global, e dos coeficientes de concordância kappa e Tau. As classes que apresentaram maior área de cobertura no período analisado foram: vegetação ombrófila densa, agropecuária, solo exposto e manguezal. Foram identificados dois vetores principais responsáveis pela supressão dos bosques de mangue: a expansão desordenada das áreas urbanas (com destaque para o município de Valença) e o avanço da atividade de carcinicultura clandestina, devido a instalação de tanques de cultivo de camarão sem o devido processo de licenciamento ambiental (sobretudo no município de Nilo Peçanha). O uso das geotecnologias, em especial o Sensoriamento Remoto e os Sistemas de Informações Geográficas, foram ferramentas fundamentais na identificação destes vetores responsáveis pela supressão das áreas de manguezal na área de estudo região do Baixo Sul da Bahia. Mapping and identification of vectors responsible for mangrove suppression in the Southern Bahia Lowlands, BrazilA B S T R A C TThe mangrove ecosystem represents 8% of the entire coastline of the planet and occupies a total area of 181,077 km2. Brazil is the second largest country in terms of mangrove areas, second only to Indonesia. The aim of the present study was to map and identify the main vectors responsible for the suppression of mangrove cover in the Southern Lowlands of Bahia, Brazil, from Landsat satellite images available for the period 1994-2017. based on supervised classification using the Maxver method. The accuracy of the classification obtained was verified through field truth, Global Accuracy indices, and kappa and Tau agreement coefficients. The classes that presented larger coverage area in the analyzed period were: dense ombrophilous vegetation, agriculture, exposed soil and mangrove. Two main vectors responsible for the suppression of mangrove forests were identified: the disorderly expansion of urban areas (especially the municipality of Valença) and the advance of clandestine shrimp farming due to the installation of shrimp farms without due environmental licensing process (mainly in the municipality of Nilo Peçanha). The use of geotechnologies, especially Remote Sensing and Geographic Information Systems, were fundamental tools in the identification of these vectors responsible for the suppression of mangrove areas in the study area of the Southern Bahia Lowlands.Key-words: environmental impacts, satellite image, shrimp farming.

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Hydrodynamic model for investigating the impact of reclamation islands in Jakarta Bay to mangrove ecosystem in the area

10.1063/5.0016899 ◽

2020 ◽

Author(s):

Adecar Nugroho ◽

Ikha Magdalena

Keyword(s):

Hydrodynamic Model ◽

Mangrove Ecosystem ◽

The Impact

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INTEGRATED USE OF REMOTE SENSING, GIS AND GPS TECHNOLOGY FOR MONITORING THE ENVIRONMENTAL PROBLEM OF SHYAMNAGAR

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-1-w1-357-2017 ◽

2017 ◽

Vol XLII-1/W1 ◽

pp. 357-364 ◽

Cited By ~ 1

Author(s):

M. S. Akbar ◽

M. H. Sarker ◽

M. A. Sattar ◽

G. M. Sarwar ◽

S. M. M. Rahman ◽

...

Keyword(s):

Remote Sensing ◽

Land Use ◽

Land Cover ◽

Salt Water ◽

Shrimp Farming ◽

Salt Water Intrusion ◽

Agricultural Practice ◽

Agriculture Land ◽

The Impact ◽

Shrimp Cultivation

Cultivation of shrimp mostly in unplanned way has been considered as one of the major environmental disasters of Shamnagar. Villagers surrounding the rivers are mainly involved with fish (shrimp) cultivation. So, fertile agriculture land has been converted to shrimp cultivation. Conversion of agriculture land to other usage is a common but acute problem for land resources of the country like Bangladesh. Conventional methods for collecting this information are relatively costly and time consuming. Contrarily, Remote Sensing satellite observation with its unique capability to provide cost-effective support in compiling the latest information about the natural resource. Remote sensing, in conjunction with GIS, has been widely applied and been recognized as a powerful and effective tool in detecting land use and land cover changes. RapidEye, Landsat8 images were used to identify land use and land cover of the area during the period 2008 and 2015. Google images were used to identify the micro-level land use features of the same period. Multi-spectral classifications using unsupervised and supervised classification were done and results have been compared based on the field investigation. The study reveals that during the period 2008 to 2015 agricultural practice has been reduced from 35&thinsp;% to 21&thinsp;% and shrimp cultivation area increased from 38&thinsp;% to 50&thinsp;%. Due to the impact of high salinity and salt water intrusion caused by natural disaster, agricultural activities is reduced and farmers have been converted to other practices, as a result shrimp farming is gaining popularity in the area.

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Water quality impact from shrimp farming effluents in a tropical estuary

Water Science & Technology ◽

10.2166/wst.2020.559 ◽

2020 ◽

Author(s):

E. G. Bull ◽

C. de L. da N. Cunha ◽

A. C. Scudelari

Keyword(s):

Water Quality ◽

Organic Matter ◽

Shrimp Farming ◽

Anthropogenic Source ◽

Tropical Estuary ◽

Quality Model ◽

Management Techniques ◽

The Impact ◽

Shrimp Farms ◽

Water Quality Impact

Abstract Shrimp farms cause environmental impacts in coastal ecosystems, compromising water quality by discharging effluents rich in nutrients and organic matter. The impacts of shrimp farming are often investigated by the unit effect of a farm. In this study, a harvest time series generator is used to analyze the impact of the synergistic effect of several shrimp farm harvests in a tropical estuary. Two other scenarios with harvests concentrated during spring and neap tides were also analyzed, showing waste management techniques that can reduce the impact of shrimp aquaculture on coastal areas. A hydrodynamic circulation and water quality model were implemented to evaluate the dispersion of pollutants using different discharge combinations. The harvesting scenarios were compared to a scenario without the activity. Results indicate that shrimp farming is not the main anthropogenic source of pollution in the estuary studied. There were no significant differences in the average and maximum variations in nutrient and organic matter concentrations between the different management techniques.

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Challenges in Controlling Vibriosis in Shrimp Farms

10.5772/intechopen.97018 ◽

2021 ◽

Author(s):

Hethesh Chellapandian ◽

Jeyachandran Sivakamavalli ◽

A. Vijay Anand ◽

Balamuralikrishnan Balasubramanian

Keyword(s):

Environmental Factors ◽

Penaeid Shrimp ◽

Vital Role ◽

Shrimp Farming ◽

Green Water ◽

Shrimp Culture ◽

Promising Alternative ◽

Bacterial Diseases ◽

Live Feeds ◽

The Impact

Recently the shrimp farming has blooming as a crucial counterpart in the aquaculture industry which contribute the remarkable role in sea food production as well economy of the country. However, this could be fluctuated every year through several circumstances such as unfavorable (Poor water and soil quality) environmental factors. The environmental factors includes disease causing bacterial pathogens in the soil and water which causes the bacterial diseases in the aquatic animals, like this hectic problems are prevented through bioaugmentation strategies. The pond environment plays a vital role in determining the healthy culture system, but there is high risk for manipulation by bacterial community which takes care of waste generated in the system through in situ bioremediation. Due to the impact of rapidly growing bacterial diseases of shrimps throughout the world, numerous studies have been carried out to find immunostimulants, immunomodulators and biotic component that can be used against vibrio causing pathogens, and can also be used as an alternative for antibiotics. Recent research focus towards the marine resources such as microalgae, seaweed, live feeds (like artemia, copepods, rotifers), bacteriophage, and probiotics have been found to have higher potential in reducing vibriosis. Eco-based shrimp farming includes green water technology, phage therapy bio-floc technology (BFT) and integrated multi-trophic aquaculture (IMTA), these methods hold a promising alternative to antibiotics in the near future. Bacterial diseases caused by vibrios have been reported in penaeid shrimp culture systems implicating at least 14 species and they are Vibrio harveyi, V. splendidus, V. parahaemolyticus, V. alginolyticus, V. anguillarum, V. vulnificuslogei etc.

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Bringing back the Chakaria Sundarbans mangrove forest of South-east Bangladesh through sustainable management approach

Asian Journal of Forestry ◽

10.13057/asianjfor/r040204 ◽

2020 ◽

Vol 4 (2) ◽

Author(s):

Shourav Dutta ◽

MOHAMMED KAMAL HOSSAIN

Keyword(s):

Sustainable Management ◽

Mangrove Forest ◽

Mangrove Ecosystem ◽

Shrimp Farming ◽

Management Approach ◽

Conservation Practices ◽

Extensive Literature ◽

Severe Damage ◽

Forest Diversity ◽

Sundarbans Mangrove

Abstract. Dutta S, Hossain MK. 2020. Bringing back the Chakaria Sundarbans mangrove forest of South-east Bangladesh through sustainable management approach. Asian J For 4: 65-75. The oldest mangrove forest of Indian sub-continent namely Chakaria Sundarbans (CS) is currently in a critical situation. Destructive anthropogenic and natural impacts coupled with shrimp farming and excessive grazing has caused severe damage to this oldest mangrove ecosystem. A study was carried out based on the extensive literature survey and tried to explore the overall situation and conservation practices for CS of Bangladesh. This paper analyzed, reviewed, and identified the impacts of natural and man-made effects on CS mangroves. Finally, we recommended the sustainable management approach (SMA) including policy and participation of the local people for bringing back this potential natural mangrove forest resource of CS along with rich forest diversity.

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Species Diversity and Carbon Stock Assessments in Mangrove dan Buffer Zone Conservation Areas, West Papua, Indonesia

10.31219/osf.io/bkg4m ◽

2021 ◽

Author(s):

Daril Andrean Davinsa ◽

Waskito Aji Suryo Putro ◽

Dyah Putri Utami

Keyword(s):

Global Warming ◽

Carbon Stock ◽

Buffer Zone ◽

Mangrove Ecosystem ◽

Carbon Trading ◽

Conservation Areas ◽

Conservation Area ◽

Mangrove Area ◽

Stock Assessments ◽

The Impact

Global warming is the foremost natural issue nowadays. the number of community or companies that are beginning to not consider natural standards is accelerating global warming. PT Pertamina Refinery Unit VII Kasim with a mangrove conservation area and buffer zone has a role in reducing the impact of global warming. This can be a potential for carbon stock and absorption in conservation areas. Carbon research can also be linked to world carbon trading, as a form of commitment from a country that does not have forests. This study aims to determine the results of carbon stock and absorption in the mangrove area and buffer zone. This research was conducted in July 2021 in the company's conservation area. The diversity of species mangrove with 5 results and 13 species in bufferzone areas. The carbon results obtained, that the two conservation areas have great potential in absorbing and storing carbon. The result of carbon stock in the mangrove area is 32.93 tons/ha and in the buffer zone area is 588.86 tons/ha. While the carbon absorption in the mangrove ecosystem is 8.97 tons/ha and in the buffer zone area is 160.45 tons/ha. In carbon trading, the Pertamina RU VII Program has the potential to contribute to the country as much as (1.6 billion).

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The Impact of a Fishing Harbour under Construction on the Distribution and Zonation of the Flora and the Molluscan Fauna of a Tropical Mangrove Ecosystem

Water Science & Technology ◽

10.2166/wst.1984.0074 ◽

1984 ◽

Vol 16 (3-4) ◽

pp. 425-431

Author(s):

A V S Rambabu ◽

B V Prasad ◽

D Lakshmana Reddy ◽

P N Rao ◽

M Balaparameswara Rao

Keyword(s):

South India ◽

Distribution Density ◽

Mangrove Ecosystem ◽

Coastal Engineering ◽

Engineering Project ◽

River Confluence ◽

Molluscan Fauna ◽

Under Construction ◽

The Impact ◽

Estuarine Region

The region concerned is Nizampatnam (15° 54ꞌN; 80° 43ꞌE), a major fishing village in the Krishna estuarine region, located at about 35 km south of Krishna River confluence in South India. This region is traversed by a number of canals (some are from river Krishna) and drains which open into the Bay of Bengal, and is characterized by the presence of swampy ground with dense to scattered mangroves. The coastal engineering project now under construction (for the last 3 years) at this region, is a Pishing Harbour. The present paper deals with the changes in the distribution, density and zonation of the flora and the molluscan fauna before and during the construction of this engineering project.

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