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Research Article
Development of a Macroinvertebrate Multimetric Index for the Evaluation of the Ecological Quality of Lake Nokoué
Houéyi Bénédicta Priscilia Capo-Chichi*
,
Delphine Adandedjan,
Thierry Matinkpon Agblonon Houelome,
Philippe Adédjobi Laleye,
Antoine Chikou,
Christophe Kaki,
Hyppolite Agadjihouede
Issue:
Volume 12, Issue 5, October 2024
Pages:
98-110
Received:
2 April 2024
Accepted:
27 May 2024
Published:
20 September 2024
Abstract: Nowadays, new tools for assessing the biotic integrity of aquatic environments are used. In Benin, the Macroinvertebrate MultiMetric Lake Index (M3LI) was designed to reveal the current state of Lake Nokoué. The inventory was carried out in eight seasonal data collection campaigns from 2019 to 2021 using an Eckman type grab and a trouble net. The composition, diversity and different metrics were calculated. Thirty-nine metrics grouped into five categories were defined and subjected to selection using a PCA in order to identify the relevant metrics for calculating the index. In the lake, 83 taxa divided into 25 orders and 54 families representing 32,770 specimens were determined. Insects, Molluscs, Crustaceans and Annelids constituted the essential macrofauna which was numerically dominated by Gastropods, Crustaceans, Bivalves and Insects. Of the 5 food functional groups obtained, crushers and collector-gatherers were dominant. Ten metrics relevant and well explained by environmental variables were used to calculate M3LI. The M3LI calculated varied from 6.44 at the station near Dantokpa to 3.38 at the Cotonou channel station with fluctuating water quality between poor quality and good quality. These results clearly explain the responses of the living communities of the lake faced with the various stresses due to daily marine intrusion, the role of receptacle of different continental waters and the various anthropogenic activities plunging the environment into a hypereutrophic state. It is therefore urgent to take measures to restoration of this environment to allow living species to regain their balance of life. This index is also a departure for the establishment of a biomonitoring program for the restoration of the lake.
Abstract: Nowadays, new tools for assessing the biotic integrity of aquatic environments are used. In Benin, the Macroinvertebrate MultiMetric Lake Index (M3LI) was designed to reveal the current state of Lake Nokoué. The inventory was carried out in eight seasonal data collection campaigns from 2019 to 2021 using an Eckman type grab and a trouble net. The c...
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Research Article
Trace Metal Elements (TMEs) in Groundwater Around the Former Industrial Gold Mine of Poura in Burkina Faso – West Africa
Issue:
Volume 12, Issue 5, October 2024
Pages:
111-124
Received:
10 September 2024
Accepted:
27 September 2024
Published:
29 October 2024
Abstract: The objective of this study is to assess the quality of groundwater around the first industrial mine in Burkina Faso, whose activities have been closed since 1999. The diagnosis of pollution by trace metal elements of groundwater around the old Poura gold mine was carried out through the determination of the contents of Trace Metal Elements (TME) at MP-AES and the measurements of the physicochemical parameters in situ on 38 samples of borehole water. These data made it possible to calculate the pollution risk index, to establish correlations between the different physicochemical parameters on the one hand and with the trace metal elements on the other hand, from the Pearson matrix and to carry out a multivariate statistical analysis, in particular that in principal components (PCA), with a view to determining the origin of the polluting elements. The results obtained made it possible to identify four samples of groundwater with an acidic pH (GWF18 (6.44), GWF19 (6.39), GWF23 (6.1) and GWP01 (5.99)) and 34 samples of groundwater whose Cd, Al, Fe, As, Pb, or Hg contents are higher than the standards in force in Burkina Faso. The Pollution risk Index (PI) indicates that 35 groundwater samples are slightly polluted and 3 groundwater samples are very heavily polluted (GWP01 (PI = 456%), GWF06 (PI = 132.5%), GWF03 (PI = 105.1%)). The Pearson correlation matrix and the principal component analysis (PCA) show that the origin and mobilization of the trace metal elements involved (Al, As, Cd, Cr, Fe, Hg and Pb) are linked to natural mineralization and anthropogenic activities such as mining and agricultural activities, favored by the infiltration of water into the subsoil through geological structures such as fractures and faults.
Abstract: The objective of this study is to assess the quality of groundwater around the first industrial mine in Burkina Faso, whose activities have been closed since 1999. The diagnosis of pollution by trace metal elements of groundwater around the old Poura gold mine was carried out through the determination of the contents of Trace Metal Elements (TME) a...
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Research Article
An Assessment of the Response of Land Surface Temperature to Land Use/Land Cover Change for Sustainable City
Emmanuel Oluwafemi Olofin*
Issue:
Volume 12, Issue 5, October 2024
Pages:
125-132
Received:
22 August 2024
Accepted:
13 September 2024
Published:
31 October 2024
Abstract: The influx of people from the rural settlements to urban settlements has brought about the conversion of natural surfaces to artificial impervious surfaces. These urban features directly influence the Land Surface Temperature (LST) in the Cities. In order to analyze the changes in Land Use/Land Cover (LU/LC) and its effect on LST in Abeokuta, Ogun State, Nigeria, from 1988 to 2018, this study used Geographic Information System (GIS) and Remote Sensing. In this study, Abeokuta Landsat satellite data from 1988, 1999, 2013, and 2018 were used. A Land Use/Land Cover Changes (LU/LC) analysis was conducted using ERDAS Imaging 9.2 to ascertain the areas covered by each land use type from 1988 to 2018. Landsat images were used to obtain the city's LST values from 1988 to 2018. The research findings indicate that between 1988 and 2018, built-up land use type increased while vegetative land use declined within the research area. Furthermore, the study shows that in response to changes in land use and land cover, the amount of LST increased in Abeokuta along with the increase in built-up land use. Therefore, the study suggests creation of green belts within the city in order to mitigate the impact of impervious artificial surfaces on LST. This will make the cities comfortable for its dwellers and will ensure the sustainability of the of the urban areas.
Abstract: The influx of people from the rural settlements to urban settlements has brought about the conversion of natural surfaces to artificial impervious surfaces. These urban features directly influence the Land Surface Temperature (LST) in the Cities. In order to analyze the changes in Land Use/Land Cover (LU/LC) and its effect on LST in Abeokuta, Ogun ...
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Review Article
Climate Change Impacts and Adaptation Measures for Household Food Security Status: A Review in Geospatial Technology Perspective
Terefe Hundessa*,
Bahailu Getu
Issue:
Volume 12, Issue 5, October 2024
Pages:
133-140
Received:
18 September 2024
Accepted:
8 October 2024
Published:
31 October 2024
Abstract: This paper explores the implications of climate change, vulnerability, adaptation, and their effects on food security, emphasizing challenges like global warming and shifts in climate patterns threatening agricultural productivity. The primary objective of this study is to evaluate climate change impacts on natural resources, communities, sustainable agriculture, and food security, and community livelihood status emphasizing the significance of GIS and remote sensing technologies for understanding and addressing climate change effects. Utilizing a systematic literature review methodology, the study synthesizes findings from various sources to identify effective adaptation strategies. The study discusses various adaptation strategies, including the adoption of climate-resilient crops and sustainable agricultural practices, while considering the importance of community engagement and local knowledge in developing effective interventions. The role of geospatial technology in solving the problem of climate change is highly considered in this review. Additionally, the review delves into the stage of remote sensing in assessing climate change impacts on agriculture and human populations, highlighting the crucial role of remote sensing and GIS in sustainable natural resource conservation and climate change mitigation efforts. The review calls for policymakers, researchers, and practitioners to prioritize climate change adaptation to enhance the resilience of food systems and secure a sustainable future for communities facing the challenges of climate change.
Abstract: This paper explores the implications of climate change, vulnerability, adaptation, and their effects on food security, emphasizing challenges like global warming and shifts in climate patterns threatening agricultural productivity. The primary objective of this study is to evaluate climate change impacts on natural resources, communities, sustainab...
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