Effects of fragmented mangroves on macrozoobenthos: a case study of mangrove clearance for powerline right-of-way at Oproama Creek, Niger Delta, Nigeria

Zabbey, Nenibarini; Ekpenyong, IG; Nwipie, GN; Davies, I. C; Sam, Kabari

doi:10.2989/16085914.2020.1832437

Cited by 11 publications

(8 citation statements)

References 71 publications

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“…The study was carried out along two creeks which are joint tributaries of Sombreroraro Estuary in the Asari-Toru Local Government Area of Rivers State (Figure 1) which is one of the 21 estuaries in the Niger Delta geomorphic unit of Nigeria's extensive (approximately 853 km) coastline (Zabbey et al, 2021). Located Southeast of the Niger Delta between longitude N04 0 48' 14.0" and latitude E006 0 50' 16.…”

Section: Study Areamentioning

confidence: 99%

Impact of Artisanal Crude Oil Refining Effluents on Interstitial Water at a Mangrove Wetland, Asari-Toru Axis of Sombreiro River, Rivers State.

Chris

OGEHENETEKEVWE

2023

International Journal of Environment and Geoinformatics

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A comparative study on the water quality of the interstitial water of two creeks in Rivers State was conducted. Temperature, pH, Conductivity, Dissolved oxygen, biochemical oxygen demand, Salinity, and Total dissolved solid were checked with an in-situ hand-held multi-meter (The EZODO Multi-meter). Dissolved oxygen (DO) was measured with a Milwaukee Dissolved oxygen meter while Biochemical Oxygen Demand (BOD) was determined by the 5-day BOD test (APHA, 2005). The temperature ranged between 28.3 to 29.3℃ in the Opro-ama creek and 26.0 -26.8℃ in Buguma creek. The pH value ranged from 6.2 to 6.8 in Opro-ama creek while that of Sa-ama creek was between 6.8 and 6.99. Salinity ranges from 9.1 to 9.5 (ppt) in the Opro-ama creek while Sa-ama creek recorded a range between 11.2 to 12.0 (ppt). The dissolved oxygen was between 1.5 and 2.3 (µS/cm) in Okpoka creek meanwhile Sa-ama creek varied between 4.6 and 4.10 (µS/cm). The biochemical oxygen demand values were between 1.4 to 2.3 (µS/cm) in Opro-ama creek while that of Sa-ama was between 1.9 to 2.4 (µS/cm). The conductivity values for the Opro-ama creek were between 10.3 and 10.6 while Sa-ama creek recorded a value of 12.5 to12.6 (µS/cm). there were significant variations (P

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Section: Study Areamentioning

confidence: 99%

Impact of Artisanal Crude Oil Refining Effluents on Interstitial Water at a Mangrove Wetland, Asari-Toru Axis of Sombreiro River, Rivers State.

Chris

OGEHENETEKEVWE

2023

International Journal of Environment and Geoinformatics

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“…The study was carried out at three (3) different stations {Abala-ama (Station 1), Opuro-ama (Station 2), and Sa-ama (Station 3)} across the Opuro-ama creek which is located in Asari-Toru Local Government Area of Rivers State (Figure 1). The Creek is a tributary of the Sombreiro Estuary, one of the 21 estuaries in the Niger Delta geomorphic unit o f Nigeria's extensive (approximately 853 km) coastline 12 . Located southeast of the Niger Delta between longitude N04 0 48' 14.0" and latitude E006 0 50' 16, the Opuro-ama Creek system consists of the main channel and associated feeder creeks linking Abala-ama, Sa-ama, Te-ama community, and other riparian communities.…”

Section: Study Areamentioning

confidence: 99%

Minerals and Trace Elements Content of Selected Shellfish from Opuro-ama Waterfront: An Impacted Tidal Creek in Rivers State, Nigeria

Chris¹,

Nkeeh²,

Oghenetekevwe³

2022

IJAES

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In this study, the content of essential minerals, copper (Cu), iron (Fe), manganese (Mn), calcium (Ca), and sodium (Na) in the edible parts of Tympanotonus fuscatus, Thais coronata, Crassostrea gasar, Cardisoma guanhumi and Callinectes amnicola from Opuro-ama creeks, River’s state were analyzed using Atomic Absorption Spectrophotometer and descriptive statistical analyses of variance were done using SPSS and significant means were separated using the Duncan multiple range test at 0.05. High Cu content was found in the T. coronata (9.66mg/g) while the lowest was observed in C. amnicola (0.54mg/g). Fe was higher in C. gasar (37.8mg/g) and the lowest in T. fuscatus (6.78mg/g). The concentration of Manganese was highest in C. guanhumi (144.8mg/g) and least T. fuscatus in (15.9mg/g). C. guanhumi recorded the highest (225.1mg/g) Ca content while the least was observed in T. fuscatus (55.8mg/g). T. coronata recorded the highest (2.11mg/g) Na content while the least was found in T. fuscatus (0.22mg/g). Ca was the highest mineral observed in all five shellfish, and the least was Sodium (Ca >Mn.>Fe>Cu>Na). The Physico-chemical parameters such as Temperature (°C), pH, Salinity (ppt), DO (Mgl-1), BOD (Mgl-1) and Conductivity (µS/ cm) observed during the study were all within the acceptable limits of the World Health Organization (WHO), Department of Petroleum Resources (DPR) and Federal Environmental Protection Agency (FEPA). The five shellfish species from the Opuro-ama creeks were shown to be good sources of nutrients at various levels, therefore might be a useful alternative for other materials for animal feed formulation

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“…Path/Row Rainfall (mm/year) Species No. of Scenes Niger Delta 189/57 3000-4500 [14,33] Rhizophora racemosa, R. mangle, R. harrisonii [34,35] 163…”

Section: Study Sitementioning

confidence: 99%

“…It contains Africa's largest contiguous mangrove forest [12] and the third largest mangrove forest globally [48]. The dominant mangrove species in the area are Rhizophora racemosa, R. mangle, and R. harrisonii with Avicennia germinans and Laguncularia racemosa also present [34,35]. The Niger Delta is also Africa's largest river delta and is home to around 20% of Nigeria's population [48].…”

Section: Niger Delta Nigeriamentioning

confidence: 99%

Evaluation of the Continuous Monitoring of Land Disturbance Algorithm for Large-Scale Mangrove Classification

et al. 2021

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Mangrove forests are of high biological, economic, and ecological importance globally. Growing within the intertidal zone, they are particularly vulnerable to the effects of climate change in addition to being threatened on local scales by over-exploitation and aquaculture expansion. Long-term monitoring of global mangrove populations is therefore highly important to understanding the impact of these threats. However, data availability from satellites is often limited due to cloud cover. This problem can be mitigated using a season-trend modelling approach such as Continuous Monitoring of Land Disturbance (COLD). COLD operates by using every available observation on a pixel-wise basis, removing the need for whole cloud free images. The approach can be used to better classify land cover by taking into account the underlying seasonal variability, and can also be used to extrapolate between data points to obtain more accurate long term trends. To demonstrate the utility of COLD for global mangrove monitoring, we applied it to five study sites chosen to represent a range of mangrove species, forest types, and quantities of available data. The COLD classifier was trained on the Global Mangrove Watch 2010 dataset and applied to 30 years of Landsat data for each site. By increasing the period between model updates, COLD was successfully applied to all five sites (2253 scenes) in less than four days. The method achieved an overall accuracy of 92% with a User’s accuracy of 77% and a Dice score of 0.84 for the mangrove class. The lowest User’s accuracy was for North Kalimantan (49.9%) due to confusion with mangrove palms. However, the method performed extremely well for the Niger Delta from the 2000s onwards (93.6%) despite the absence of any Landsat 5 data. Observation of trends in mangrove extent over time suggests that the method was able to accurately capture changes in extent caused by the 2014/15 mangrove die-back event in the Gulf of Carpentaria and highlighted a net loss of mangroves in the Matang Forest Reserve over the last two decades, despite ongoing management. COLD is therefore a promising methodology for global, long-term monitoring of mangrove extent and trends.

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Effects of fragmented mangroves on macrozoobenthos: a case study of mangrove clearance for powerline right-of-way at Oproama Creek, Niger Delta, Nigeria

Cited by 11 publications

References 71 publications

Impact of Artisanal Crude Oil Refining Effluents on Interstitial Water at a Mangrove Wetland, Asari-Toru Axis of Sombreiro River, Rivers State.

Impact of Artisanal Crude Oil Refining Effluents on Interstitial Water at a Mangrove Wetland, Asari-Toru Axis of Sombreiro River, Rivers State.

Minerals and Trace Elements Content of Selected Shellfish from Opuro-ama Waterfront: An Impacted Tidal Creek in Rivers State, Nigeria

Evaluation of the Continuous Monitoring of Land Disturbance Algorithm for Large-Scale Mangrove Classification

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