Hurricane latent heat energy from annual Amazon deforestation runoff
February 2023
This study analyzed latent heat flux from Amazon deforestation runoff above the Central/North American Boundary currents from 1988-2015. The purpose is to propose Atlantic hurricane intensification from the heat flux via condensation. The author divided those currents into ten areas of evaporation considering water budget data and regional and water-vapor-transport. A spreadsheet program consisting of two...
Caspian Sea: Environmental controls and trophic webs interactions
August 2021
Gelatinous zooplankton (GZ) populations are sensitive to climate change such as environmental perturbations, and spatial changes in their abundance and biomass may be associated with degraded environmental and biota conditions. Big data time series of GZ abundances and biomass were used to analyze the annual population dynamics of gelatinous zooplankton as well as mesozooplankton in the southern Caspian Sea, Iran from...
Heavy metal concentration and public health risk in consuming Sardinella maderensis (Sardine), Sarotherodon melanotheron (Tilapia), and Liza falicipinis (Mullet) harvested from Bonny River, Nigeria
March 2020
Contamination of the river by oil spill had put the health of the people who consume fish at risk. Five fish samples each of Liza falicipinis (Mullet), Sarotherodon melanotheron (Tilapia) and Sardinella maderensis (Sardine) (n=15) were collected monthly from the Bonny Estuary from February to July 2018. The samples were oven dried at 100°C and analyzed using Atomic Absorption Spectrophotometer (Model pm ver 2.02...
Influence of climatic factors on Sargassum arrivals to the coasts of the Dominican Republic
October 2019
Since 2011, the coasts of North America, Mexico, and the Caribbean have experienced an unusual increase in the arrival of Sargassum. A large amount of Sargassum has caused significant economic losses in the tourism sector of the Dominican Republic as well as the entire Caribbean region. The present article discusses the possible factors contributing toward this unusual increase. Large Sargassum masses are...
Detection and spatio-temporal variation of marine heatwaves in the Gulf of Guinea, Nigeria
October 2019
Time series analyses spanning 30 years (1988 - 2017) on spatial and temporal variations in sea surface temperatures reveal the occurrence of marine heatwaves (MHWs) within the Nigerian segment of the Gulf of Guinea. For specific focus, three locations were also chosen along Nigeria’s coastal zone, namely Lagos lagoon (western region), the Niger Delta (Forcados/Central region) and outer Cross River estuary (eastern...
Spatial variability in autumnal equatorial upwelling intensity within the Gulf of Guinea as inferred from in situ measurements
March 2019
In attempt to study the spatial differences in autumnal equatorial upwelling intensity relative to bio-productivity in the eastern equatorial Atlantic, oceanographic in situ data along regions 10°W, 0°E, 2.5°E and 6°E, collected in the Gulf of Guinea during autumn cruise carried out in September 2007 were analyzed. The surface mean values for temperature along 10°W, 0°E, 2.5°E and 6°E are...
Evidence for enhanced chlorophyll-a levels in the Bay of Bengal during early north-east monsoon
February 2018
To understand the chlorophyll-a distribution in the neritic waters of the northern Indian Ocean, which comprises the Arabian Sea on the west and the Bay of Bengal on the east, seawater samples were collected during early north-east monsoon season (November, 2008). The column integrated chlorophyll-a over the Arabian Sea and the North Bay of Bengal exhibit high concentrations. However, the southernmost station (0806)...
Spatial distribution and diversity of phytoplankton community in Eastern Obolo River Estuary, Niger Delta
January 2018
This paper reported a two season study of diversity, spatial distribution, species composition of phytoplankton and physico-chemical characteristics of the Eastern Obolo River Estuary between June and November 2015 and December and May, 2016. Water conductivity (≥675) showed direct relationship with phytoplankton abundance, turbidity showed strong correlation with species density as well. Species were more evenly...
Growth and exploitation parameters of Ilisha africana, by-catch of the experimental fishing for the study on selectivity of gill nets for Ethmalosa fimbriata, in the Saloum estuary and Joal (Senegal)
May 2017
Growth and exploitation parameters Ilisha africana were determined from the size frequency for the first time in Senegal. The size distribution showed average sizes equal to 19.26 ± 1.70 and 19.75 ± 2.03 cm, respectively in the estuary and at the sea. The values of allometric rates of the length-weight relationship were, respectively equal to 2.88 and 2.93 in the estuary and at the sea indicating a...
Embryonic development of anemone fishes in captivity
March 2017
Broodstock development, spawning, fertilization, embryonic development, fecundity, “hatching rate and deformation rates” of five species (Amphiprion ocellaris, A. percula, A. melanopus, A. clarkii and A. nigripes) of anemone fish were studied in captive condition. The egg diameter, parental care, fecundity rate, fertilization rate, hatching rate, deformation rates and size of eggs were quantified. In...
Recruitment pattern and catch per unit effort of the Black Tiger Shrimp (Penaeus monodon) in Andoni River System, Niger Delta Region of Nigeria
December 2016
The investigation of recruitment pattern and catch per unit effort of the black tiger shrimp (Penaeus monodon) was conducted from March 2012 to February 2013 in Andoni River System, Niger Delta region of Nigeria. Total weight and length of sampled P. monodon, number of fishers, fishing duration and temperature were sampled monthly. Total weight of P. monodon landed, number of fishers and fishing duration was used to...
Baseline physico-chemical and bathymetry assessment of Mahin Lake, Southwestern, Nigeria
November 2016
Assessment of baseline physico-chemical parameters and bathymetry mapping of Mahin Lake has been carried out for effective and sustainable utilization, management, conservation, and exploitation of its resources. pH, temperature, dissolved oxygen, electrical conductivity, resistivity, total dissolved solid (TDS), salinity, and surface pressure were determined in situ; while concentrations of calcium, magnesium, sodium,...
Estimation of extremes in the southern Arabian Gulf
October 2016
Extreme all-direction wave conditions and joint probabilities of high waves and high water levels are derived at selected locations in the southern Arabian Gulf. The wave conditions are obtained using the spectral wave model SWAN with wind and offshore wave information procured from ocean weather, supplemented with local water level records. Wave transformations from offshore to nearshore and waves generated by local...
Effect of hydroclimatic conditions on phytoplankton community at Epe Lagoon tributary, Southwest Nigeria
September 2016
The effect of hydroclimatic conditions on phytoplankton was investigated in Ejirin, part of Epe lagoon, south-western Nigeria from December, 2012 to May, 2013. The data obtained for hydroclimatic features responded to rainfall pattern during the study period. The water remained acidic throughout the sampling period as pH value was ≤ 6.6 and salinity value ≤ 0.01%. The micronutrients varied throughout the sampling...
On the Nutrient distribution and phytoplankton biomass in the Gulf of Guinea equatorial band as inferred from In-situ measurements
July 2016
Oceanographic in situ data collected in the Gulf of Guinea during six cruises carried out between 2005 and 2007 were analysed to study the influence of equatorial upwelling on the productivity of the region. At 10°W, observations during boreal summer and autumn cruises captured seasonal upwelling influences. In response to the shoaling pycnocline in June 2005, higher concentrations of nitrate and chlorophyll...
Microalgae richness and assemblage of man-made solar saltpans of Thoothukudi, TamilNadu
July 2015
Solar saltpans are ponds of brine sun evaporated to crystallize salt (Halite). Once provide ambient ecology for several halophilic microalgae. Enumeration of microorganisms in Thoothukudi solar saltpans revealed the presence of 30 genera of microalgae belonging to the divisions of Cyanophyta, Bacillariophyta and Chlorophyta. Chlorophyta species is the dominant group of solar salterns of Thoothukudi. Key...
Measurement of heavy metals accumulation in ctendia of Anadara ehrenbergi (Dunker, 1868) using energy-dispersive x-ray fluorescence (EDXRF)
January 2015
Specimens were collected from three estuarine localities of the Arabian Gulf (Saudi Arabia) namely northern Khobar, southern Khobar and Ad-Dammam estuarine beaches during January and August 2013 and June 2014. Three collections in the form of twenty specimens were samples in each month from each locality. Immediately these samples were dissected and ctendia were isolated and frozen at -20°C. Using energy dispersive...
On the influence of interseasonal sea surface temperature on surface water pCO2 at 49.0°N/16.5°W and 56.5°N/52.6°W in the North Atlantic Ocean
November 2014
The sea surface temperature (SST) and partial pressure of carbon dioxide (pCO2) derived from hourly in situ measurements at Northwest (56.5°N, 52.6°W) and Northeast (49.0°N, 16.5°W) subpolar sites of the Atlantic Ocean from 2003 – 2005 were employed to investigate the seasonal pCO2–SST relationship. The results indicate weak to moderately strong significant negative relationships (r = -0.04...
Seasonal variation of enrichment and contamination of heavy metals in the surface water of Qua Iboe River Estuary and adjoining creeks, South-South Nigeria
September 2014
Seasonal variation of the distribution pattern, enrichment and contamination of some heavy metals (Cd, Cr, Fe, Pb, Zn, Ni and Cu) in surface water of Qua Iboe river estuary and adjoining creeks were investigated using physicochemical parameters. The results of wet season mean concentrations (mg/l) were: Cd (0.09 ± 0.02), Cr (0.05 ± 0.02), Cu (0.05 ± 0.01), Fe (10.68 ± 1.91), Pb (0.06 ±...
Geochemical and textural characterization of minerals in Thondi coastal sediments along the southeast coast of India
August 2014
The physicochemical characterization of seven marine sediment samples was investigated and collected from different zones along with Thondi coastal sediments along the southeast coast of India. The study found that variation in physical parameters and mud contents were due to differences in sediment source. Results of Station 3 revealed the calculated average values as follows: Bulk density (BD) (1.3 g/cm3), particle...
Analysis of energy efficiency operational indicator of bulk carrier operational data using grey relation method
July 2014
According to the International Maritime Organization's regulations, there are factors that affect the energy efficiency of ship, cargo capacity and voyage distance. This document analyzes the information gathered from the detailed trials of the Energy Efficiency Operational Indicator of Taiwan’s bulk carrier and uses it to investigate the influence of various characteristics of voyage on the indicator value....
Heavy metals in seawater, sediments and marine organisms in the Gulf of Chabahar, Oman Sea
June 2014
Levels of the heavy metals Copper (Cu), Zinc (Zn), Lead (Pb), Cadmium (Cd), Chromium (Cr), Nickel (Ni), Iron (Fe) and Manganese (Mn) were determined in coastal water, sediments and soft tissues of the Saccostrea cucullata, from the intertidal zone at five stations in the Gulf of Chabahar on the Iranian coasts along the Oman Sea. The concentrations of heavy metals in seawater ranged between 3.37 to 5.74, 18.01 to 22.62,...
Laboratory assessment of the effects of Nigerian crude oil and industrial detergent on Tympanotonus fuscatus (Gastropoda: Potamididae) in the Cross River Estuary, South-South Nigeria
May 2014
Periwinkle, Tympanotonus fuscatus, was collected from the Cross River Estuary, allowed to acclimate to laboratory conditions for 7 days and exposed to Nigerian crude oil and detergent (Klin) at different concentration intervals of 50, 100, 150, 200, 250 and 20, 40, 60, 80, 100 ml/L of water, respectively for a period of 96 h. A total of 176 mortalities were observed for detergent out of 250 individuals during the entire...
Impact of climatic change on steric sea level in the Mediterranean Sea
January 2014
The steric sea level through four layers in the Mediterranean Sea is estimated during the period of 1970 to 2005 by using hydrographic data from national world data center. Meteorological parameters are the principle factors that control the warming in the upper layer in the Mediterranean Sea. The annual sea level trends shows rising with calculated values which varies according to the different regions in the...
Modelling the dynamics of the Tanzanian coastal waters
January 2014
A numerical modeling study was carried out using the Regional Ocean Modeling System (ROMS) for the Tanzanian coast to investigate the seasonal dynamics of water circulation, temperature and salinity. The model results indicated the presence of an eddy on the surface that develops during the Northeast (NE) monsoon and which has not been documented previously. The study also revealed that, the core of the East African...
Morphodynamics and features of littoral cell circulation observed from sequential aerial photographs and Davies drifter along a section of the strand coast East of the Niger Delta, Nigeria
January 2013
Sequential aerial photographs taken along a section of the Strand coast (longitude 07°35’00” and latitude 8°30’ 20”E) East of the Niger Delta Nigeria were anaylsed to understand tidal inundation and resulting morphodynamic features as well as the littoral cell circulation patterns. Records from a Davis drifter deployed in the Qua Iboe River that traveled parallel to the...
Benthic biodiversity in the Pichavaram mangroves, Southeast Coast of India
January 2013
An attempt was made to study the benthic biodiversity in Pichavaram mangrove ecosystem, Southeast coast of India. Monthly (duplicate) sampling was done in 3 stations, (Station I - fresh water zone, Station II - core mangrove zone and Station III - marine zone) for a period of one year from January 2008 to December 2008. As many as 22 species of benthic macro fauna were recorded in the study area (16 species of...
Impact of environment variables on pelagic fish landings: Special emphasis on Indian oil sardine off Tiruchendur coast, Gulf of Mannar
December 2012
Results of the present study reported the correlation of various environmental variables such as dissolved oxygen (DO), chlorophyll ‘a’, primary productivity (PP), salinity, sea surface temperature (SST) and meteorological parameters such as air temperature (AT), air pressure (AP), relative humidity (RH), wind pattern, sunshine hours (SSH) and rainfall (RF) during January, 2008 to December, 2010 with that of...
Radiological and mineralogical investigation of accretion and erosion coastal sediments in Nile Delta Region, Egypt
December 2012
The Nile Delta coast is a dynamic sedimentary environment experiencing erosion, transport and re-deposition of sand along the coast. The aim of this study was to investigate the effectiveness of using an integrated approach of natural radioactivity of coastal sediments, heavy mineral distribution and grain size information to differentiate between the eroding and accreting areas of the Nile Delta coast. Also, it is to...
The impact of flow regime on the sedimentation pattern of Calabar River, South-East Nigeria
February 2012
The sedimentation pattern of the lower reaches of Calabar River, on the south east coast of Nigeria was investigated with a view to evolving criteria for recognition of their ancient counterparts. Using grain size statistical parameters, the sediment-sediment relationships and flow structure of the river were examined from twenty-five georeferenced bottom samples. Results show that the tidal channel is uniformly...
Valuing environmental impacts of coastal development projects: A choice experiment application in Spain
February 2012
This paper presents the results of an empirical application aimed at estimating the economic value of the potential environmental impacts to mount Jaizkibel (Spain) resulting from the construction of a new seaport over its hillside. A choice experiment technique is applied for anex-ante natural resource damage assessment in monetary terms. The results revealed that, depending on the extent of the environmental...
Seasonal and spatial variations of dissolved carbon and nitrogen in the Santos estuarine system, Southeastern Brazil
January 2012
We investigated the concentrations of nutrients carbon and nitrogen in Santos Estuarine System (SES). The SES is located in the region of Baixada Santista (Santos, Brazil) and is ecologically and economically important due to biological diversity, high levels of metal pollution and sewage, and the presence of the port considered the largest and most productive in Latin America. For the preparation of the nutrient flow...
Insights on the environmental risk of metallic accumulation in sediments of Santos Harbor, Santos Estuarine System, Southeastern Brazil
November 2011
The present study aims to evaluate the Santos harbor environmental health, the most important port of the South American, where anthropic activities are associated to metallic contamination (Al, Cr, Fe, Co, Ni, Cu, Zn, Cd and Pb). Enrichment factor, geo-accumulation index and geochemistry mobility were applied. The results showed increases in the levels of the metals with indicative of moderately to extremely pollution...
First record of Stylochelius striatus (Mollusca: Gastropoda: Anaspidea: Aplysiidae) from the Andaman Sea, India
November 2011
The paper reports the first time record of Stylochelius striatus (Mollusca: Aplysiidae), identified at Carbyn’s Cove tide pool (South Andaman), Andaman and Nicobar Islands, India. The habitat for this species is Padina algae covered tide pools. Key words: Mollusca, Nudibranch, Stylochelius striatus, new record, Andaman Sea, India
Temporal and spatial variations of heavy metals (Cu, Pb and Ni) concentration in the sediment from intertidal zone along the Iranian coasts of the Oman Sea
September 2011
In order to determine distribution and seasonal patterns of heavy metals concentration in the intertidal sediment of the north Oman sea, samples of sediment were collected from five different station in August 2007 and February 2008. The samples were oven dried and acid digested. Heavy metals content of acid digested samples were analyzed by atomic absorption spectrophotometery method. Results showed that mean Cu, Pb...
Water circulation modeling study upon the construction of al-Dannat development at the Halfmoon Bay, Saudi Arabian Gulf
September 2011
The present study aims to understand the flow field near the coast of Halfmoon Bay located in the Arabian Gulf arising due to creation of an artificial island by al-Dannat. The study was performed using the state-of-art hydrodynamic model, Princeton ocean model (POM), applied for a detailed analysis of flow conditions, temperature and salinity distributions after the creation of this artificial island. These...
Scenario generation using geographical information system (GIS) based hydrological modelling for a multijurisdictional Indian River basin
July 2011
Lack of information about the futuristic scenarios of possible water allocations acts as a deterrent in resolving the conflicts pertaining to transboundary watercourses. It is increasingly being felt that technology, in the form of simulation modelling, has a very significant role to play in this context. For water resources engineering problem solving, geographical information system (GIS) offers a cognitive spatial...
The effect of vitamin E and highly unsaturated fatty acid on growth, survival and haematocrit of goldfish (Carassius auratus gibellio)
July 2011
This study was conducted to examine the effects of different content of vitamin E and highly unsaturated fatty acid on growth and survival in goldfish. Goldfish with initial weight 0.69±0.12 g were fed with diets having different levels of vitamin E and highly unsaturated fatty acid (E100 + HUFA, E50 + HUFA, -E + HUFA, -E - HUFA) for 10 weeks. At the end of period, the final weight, specific growth rate, feed...
Numerical simulation of seasonal variations in circulations of the Bay of Bengal
June 2011
The seasonal variations in circulation at different layers of the Bay of Bengal (BOB) basin have been studied using multilayered regional ocean modeling system (ROMS). The model is simulated with climatological comprehensive ocean-atmospheric data set (COADS) wind and thermal forcing until annual cycle is reached. The northward flowing western boundary current (WBC) during spring and southward flowing east India coastal...
Notes on three new records of scleractinian corals from Andaman Islands
June 2011
Andaman group of islands being a part of India (megadiverse country) shows a great deal of ecological diversity both in terrestrial and marine ecosystems. Coral Reefs are the building blocks of marine ecological niche for the sustainable existence of marine biodiversity and advocates the other associated faunal communities for their betterment, as well as their way of life towards the future generation. Three...
Isolation and identification of Streptomyces ST1 and ST2 strains from Tsunami affected soils: Morphological and biochemical studies
April 2011
Tsunamis are one of the natural disasters that are a series of long oceanic waves. A large volume of water gets displaced from the ocean because of undersea earthquakes or land slides or volcanic eruptions or extra terrestrial collisions. Our current research focuses on screening and characterization of microbes in water, soil and other extraneous material from the Tsunami affected areas along...
Study on Mg2+ removal from ammonium dihydrogen phosphate solution by a novel emulsification extraction process
April 2011
The emulsification extraction process (EEP) is a novel method for separating solutes from aqueous solution, and for its high extraction ratio, the EEP presents huge potential for extraction from dilute solution. In this paper, the EEP is successfully generated with mixing solutions containing aqueous and organic phases at high speed. The extraction of Mg2+ from ammonium dihydrogen phosphate (NH4H2PO4) solution is...
Impacts of surface wave-induced Coriolis-Stokes forcing on the upper ocean circulation
April 2011
Using the Hybrid Coordinate Ocean Model (HYCOM), six experiments configured for three different domains: Global Ocean, South China Sea (SCS) and Western North Atlantic Ocean (WNA), are designed to investigate the effects of wave-induced Coriolis-Stokes forcing (CSF) on ocean surface phenomena including circulation, temperature and mixing processes. CSF calculated using wave parameters simulated by the WaveWatch III...
Hydrogeophysical parameter estimation for aquifer characterisation in hard rock environments: A case study from Jangaon sub-watershed, India
March 2011
This study was carried out to determine a theoretical relationship between geo-electrical data and hydraulic parameters by modifying the theories previously developed in laboratories and up-scaling the processes of pore network structures into field scale parameters. A linear relationship between transmissivity and formation factor has been developed and consequently tested on data from a typically hard rock...
Hydrogeochemistry of groundwater in Port Harcourt City, Southern Nigeria
March 2011
Rapid deterioration of groundwater quality in Port Harcourt, Southern Nigeria; due to unregulated exploitation resulting from increasing growth in the oil and gas production activities has become a major concern. The predisposition of groundwater to pollution and the realization of its serious health and economic consequences demand knowledge of the ambient groundwater quality and of the processes leading to...
Seasonal variability of heat content and isothermal layer in the Bay of Bengal
March 2011
Heat content and isothermal layer variations in the Bay of Bengal have been investigated in this study using 52 years (1950 to 2001) global ocean monthly analysis datasets based on the simple ocean data assimilation (SODA) package. The annual cycle of heat content estimated from surface to fixed depths (67.5, 125 and 500 m) and isothermal layers (26, 20 and 10°C) show seasonal variations for the entire...
Trace metals concentration in Fregata magnificens: A case study of Coroa Grande Mangrove in Sepetiba Bay, Rio de Janeiro, Brazil
February 2011
Concentrations of trace metals, cadmium (Cd), zinc (Zn), copper (Cu), lead (Pb), chromium (Cr), and nickel (Ni) were determined in Magnificent Frigatebird (Fregata magnificens) harvested in Sepetiba Bay, Rio de Janeiro, Brazil. Mean concentration levels in liver and kidney (µg.g-1 dry weight) were 8.04 and 5.57 (Cd); 66.44 and 54.64 (Zn); 45.29 and 46.89 (Cu); 44.67 and...
Spatial pattern of vertical zonation of rocky shore organisms and the influence of ocean exposure at the Islas CÃes (NW Spain)
February 2011
A sampling was conducted around the intertidal coast of the Islas Cíes, (NW Spain) with the goal of determining the variation of the shore landspace, based on vertical zonation profiles of sessile organisms in relationship with the Atlantic Ocean influence. The Western Coast is heavy wave beaten and the Eastern Coast is sheltered. Many species coexist in a limited intertidal space of the sheltered than...
Macrobenthos of shelf zone off Dhamara estuary, Bay of Bengal
February 2011
The present study is an attempt to know the status of the macrobenthos at the shelf region off Dhamara Estuary. A total of 1870 individulas per square meter of macrobenthic organisms were encountered during the study period. Population density and species diversity was found to be higher as depth increased. Polychaeta emerged as dominate macrobenthic group. Among dominant benthic...
Removal of Fe(II), Cu(II), Zn(II), and Pb(II) ions from aqueous solutions by duckweed
January 2011
Duckweed was used to study the adsorption of Fe(II), Cu(II), Zn(II), and Pb(II) ions from aqueous solutions. The experimental conditions which includes; pH, contact time, initial concentration, and loading weight on the removal process were investigated. Bach adsorption was studied at 30°C. The efficiency of adsorption depends on pH value, it increases with the increase of pH value from (2-8 ) in range...
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