Sediment Characteristics of the Andoni Flats, Niger Delta, Nigeria

Ansa, EJ; Francis, Amiye

doi:10.4314/jasem.v11i3.55071

Cited by 13 publications

(12 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high concentrations of Fe in the sediments could be due to the geological mineral compositions of Edo North, aggravated by the action of agents of nature such as precipitation and weathering as influenced by hydrogeochemistry. In addition, iron has been reported to occur at high concentrations in Nigerian soil/sediment [25]. The range of mean concentrations in this study (206.32-472.57 mg•kg -1 ) was higher than that in some existing works [4] for Ekpan Creek in Warri [2] and for Benin River, both in the Niger Delta of Nigeria.…”

Section: Spatial and Temporal Variabilitycontrasting

confidence: 65%

Physico-Chemical Trends in the Sediments of Agbede Wetlands, Nigeria

Dirisu

Olomukoro

Ezenwa

2017

Materials and Geoenvironment

View full text Add to dashboard Cite

This study assessed the physico-chemical status of sediments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86-80.53%) > silt (9.75-30.34%) > clay (7.83-13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentrations of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level.

show abstract

Section: Spatial and Temporal Variabilitycontrasting

confidence: 65%

Physico-Chemical Trends in the Sediments of Agbede Wetlands, Nigeria

Dirisu

Olomukoro

Ezenwa

2017

Materials and Geoenvironment

View full text Add to dashboard Cite

show abstract

“…Though, the crab naturally inhabits bottoms of shallow sub-tidal waters (Chindah et al , 2000), the juveniles and sub-adults can be marooned in shallow depressions in mudflats, which remained water-filled when the tide recedes. Tide pools may also contain shrimps (Eltringham, 1971) and fish fry (Ansa, 2004). Callinectes amnicola trapped in inhospitable tide pools (i.e.…”

Section: Discussionmentioning

confidence: 99%

Epifauna diversity and ecology on intertidal flats in the tropical Niger Delta, with remarks on the gastropod speciesHaminoea orbignyana

Zabbey

Malaquias

2011

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

Here we report novel data on the ecology and diversity of West African estuarine biological communities, with emphasis on the opisthobranch gastropod, Haminoea orbignyana. Macrofaunal samples were obtained from five intertidal flats within Bodo Creek in the lower Niger Delta during two years (May 2006-April 2008 to investigate diversity and community assemblages of epimacrofauna. A total of 601 individuals belonging to 18 species were recorded, with density varying between 4 ind.m 22 and 660 ind.m 22 . Gastropods (predominantly Pachymelania aurita and H. orbignyana) accounted for 92.3% of the community abundance, followed by malacostraca crustaceans (7.7%). Diversity varied (P , 0.05) between locations, with the mangrove swamp station having higher richness, diversity and evenness values than the open intertidal flat locations. The species H. orbignyana was only found on downstream sampling sites reaching a maximum density of 52 ind.m 22 . The species seems to recruit during November/December and likely attains a maximum life span of about 18 months.

show abstract

“…Asarama estuary is one of the most important navigable waterways in the far reaches within Andoni land and it connects several communities therein. Besides, it is exposed to both the natural factors and human exploitation activities daily (Ansa and Francis, 2007).…”

Section: Introductionmentioning

confidence: 99%

Plankton Diversity and Community Structure of Asarama Estuary in the Niger Delta in Relation to Physico-Chemistry

Dirisu¹

2019

Appl. Ecol. Env. Res.

View full text Add to dashboard Cite

Biodiversity of Asarama estuary at Andoni flat in the Niger Delta was surveyed in the wet and dry seasons of 2016/17; in order to ascertain the diversity, composition and community structure of plankton. Qualitative plankton samples, were collected from different sources including surface water and analysed in the laboratory. The results for the analyses for water chemistry showed optimal to near high values for the parameters, which were within the normal range of normality in tropical brackish waters. Biodiversity analyses revealed eight divisions of phytoplankton in the given order; (bacillariphyta constituting 84% > cyanophyta 8% > chlorophyta 6%, > euglenophyta 1%, ≥ dinophyta 1%, > ochrophyta < 1%, ≥ charophyta < 1%, ≥ oligohymenophorea < 1%) and three groups of zooplankton which were cyclopoida (composed of 98% of the species), harpaticoida and rotifera (which had 1% of the constituent species each). Species diversity and composition were low for zooplankton and very high for phytoplankton. Meanwhile, unregulated boat traffic and illegal pollution with crude oil products pose major challenges to the biotic communities. Nutrient enrichment may perhaps become an issue in the near future if no monitoring efforts backed with legislature are imposed on the maricultural practices of bivalves at the upstream.

show abstract

Sediment Characteristics of the Andoni Flats, Niger Delta, Nigeria

Cited by 13 publications

References 5 publications

Physico-Chemical Trends in the Sediments of Agbede Wetlands, Nigeria

Physico-Chemical Trends in the Sediments of Agbede Wetlands, Nigeria

Epifauna diversity and ecology on intertidal flats in the tropical Niger Delta, with remarks on the gastropod speciesHaminoea orbignyana

Plankton Diversity and Community Structure of Asarama Estuary in the Niger Delta in Relation to Physico-Chemistry

Contact Info

Product

Resources

About