Dynamics of Eutrophication and Its Linkage to Water Hyacinth on Lake Tana, Upper Blue Nile, Ethiopia: Understanding Land-Lake Interaction and Process

Dersseh, Minychl G.; Ateka, Aron; Zimale, Fasikaw A.; Worqlul, Abeyou W.; Moges, Mamaru A.; Dagnew, Dessalegn C.; Tilahun, Seifu A.; Melesse, Assefa M.

doi:10.1007/978-3-030-43690-2_15

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Using this figure as a benchmark, the TP concentration in Lake Tana may promote the growth of algae, which may be the reason for the lake's highest trophic level (Tibebe et al, 2019). Additionally, the polymictic structure of the lake and its shallow depth, which results in a reduced Secchi depth, are morphological characteristics that may contribute to highly eutrophic conditions; this is shown in Lake Tana (Dersseh et al, 2019;Kebedew et al, 2020). According to Carlson's trophic state classification criteria, Lake Dendi and Lake Wonchi are oligotrophic since they have the lowest TP and Chl-a contents and the highest Secchi depth (Degefu et al, 2014).…”

Section: Limnological Features Of Ethiopian Highland Lakesmentioning

confidence: 99%

Atelomix in Ethiopian Highland Lakes: their role in phytoplankton dynamics and ecological features

Wagaw,

Wosnie,

Enawgaw

2023

Fish Aquat Sci

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The objectives of this review were to synthesize the community structure of phytoplankton and the role of atelomix in the phytoplankton dynamics in Ethiopian highland lakes. Changes in a lake's physical structure, light dynamics, and availability of nutrients are closely associated with phytoplankton ecology, and phytoplankton assemblages provide insight into phytoplankton responses to these environmental changes. Based on the available information, a total of 173 species of phytoplankton are grouped under seven classes, Chlorophyceae (80 taxa), Bacillariophyceae (55 taxa), Cyanophyceae (24 taxa), Dinophyceae (6 taxa), Eugleonophyceae (6 taxa), Xanthophyceae (1 taxon), and Cryptophyceae (1 taxon) were recorded in five different tropical Ethiopian highland lakes. Chlorophyceae and Bacillariophyceae dominated in terms of species composition. Partial atelomixis, seasonality, and low nutrient concentrations seem to be the main drivers in structuring phytoplankton composition and abundances in Ethiopian highland lakes, characterized by a high diversity of atelomix-dependent benthic diatoms and desmids. Thus, this review will help understand the role of atelomix and nutrient availability in the phytoplankton composition and biomass of tropical highland lakes of Ethiopia.

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Section: Limnological Features Of Ethiopian Highland Lakesmentioning

confidence: 99%

Atelomix in Ethiopian Highland Lakes: their role in phytoplankton dynamics and ecological features

Wagaw,

Wosnie,

Enawgaw

2023

Fish Aquat Sci

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“…WH is comprised of 85–91% water and 1–26% ash, 11–50% carbon, and 0.3–3% nitrogen. In addition, Table 1 indicated that the spatitemporal variation of growth conditions (climate and water composition) could affect the WH content ( Dersseh et al, 2019 ; Dersseh et al, 2020 ). The composition of this plant favors its conversion into biofertilizer and bioenergy (biogas, biohydrogen, and bioethanol) and this was the aim of various experiences worldwide.…”

Section: Advanced Bioprocesses For Water Hyacinth Valorizationmentioning

confidence: 99%

Identifying Advanced Biotechnologies to Generate Biofertilizers and Biofuels From the World’s Worst Aquatic Weed

Ezzariai

Hafidi

Bakrim

et al. 2021

Front. Bioeng. Biotechnol.

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Water hyacinth (Eichhornia crassipes L.) was introduced as an invasive plant in freshwater bodies more particularly in Asia and Africa. This invasive plant grows rapidly and then occupies a huge layer of freshwater bodies. Hence, challenges are facing many countries for implementing suitable approaches for the valorization of the world’s worst aquatic weed, and water hyacinth (WH). A critical and up-to-date review article has been conducted for more than 1 year, based on more than 100 scientific journal articles, case studies, and other scientific reports. Worldwide distribution of WH and the associated social, economic, and environmental impacts were described. In addition, an extensive evaluation of the most widely used and innovative valorization biotechnologies, leading to the production of biofertilizer and bioenergy from WH, and was dressed. Furthermore, an integrated search was used in order to examine the related advantages and drawbacks of each bioprocess, and future perspectives stated. Aerobic and anaerobic processes have their specific basic parameters, ensuring their standard performances. Composting was mostly used even at a large scale, for producing biofertilizers from WH. Nevertheless, this review explored some critical points to better optimize the conditions (presence of pollutants, inoculation, and duration) of composting. WH has a high potential for biofuel production, especially by implementing several pretreatment approaches. This review highlighted the combined pretreatment (physical-chemical-biological) as a promising approach to increase biofuel production. WH valorization must be in large quantities to tackle its fast proliferation and to ensure the generation of bio-based products with significant revenue. So, a road map for future researches and applications based on an advanced statistical study was conducted. Several recommendations were explored in terms of the choice of co-substrates, initial basic parameters, and pretreatment conditions and all crucial conditions for the production of biofuels from WH. These recommendations will be of a great interest to generate biofertilizers and bioenergy from WH, especially within the framework of a circular economy.

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Framing water–energy–food–ecosystem (WEFE) nexus interactions in the Tana-Beles Sub-basin of Ethiopia

Abera,

Getaneh,

Balcha

et al. 2024

SNF

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The water–energy–food–ecosystems (WEFE) provide vital resources that are essential to human existence. Exploring synergies and trade-offs in these systems has been of interest in recent years to increase economic gain while sustaining the environment. The Tana-Beles Sub-basin of Ethiopia is challenged by population density, climate change, and ecosystem degradation that requires a WEFE Nexus thinking. To understand the current WEFE nexus interactions in the basin, a systematic review of 102 scientific research articles published from 1991 to 2021 was undertaken. Additionally, the systematic review is complemented by spatial data analysis to identify synergies and trade-offs among the WEFE nexus indicators. The analysis revealed the dominance of food–water–ecosystem interdependencies in WEFE nexus research for the Tana-Beles Sub-basin. This dominance is driven by extensive food production activities, which lead to substantial water abstraction and hydrological alterations to meet the intensive water demands of crop cultivation. Simultaneously, the energy-ecosystem interactions are critical due to excessive biomass utilization that exceeds the biomass production potential of the area. Furthermore, the available vegetation cover of the area is very limited to supplement the growing fuel wood demands, which is exerting extreme land degradation and threatening the ecosystem in the sub-basin. This study identifies gaps in WEFE understanding, highlights specific challenges and opportunities within the basin, and calls for coordinated stakeholder action for sustainable resource management through a Nexus approach.

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Dynamics of Eutrophication and Its Linkage to Water Hyacinth on Lake Tana, Upper Blue Nile, Ethiopia: Understanding Land-Lake Interaction and Process

Cited by 3 publications

References 20 publications

Atelomix in Ethiopian Highland Lakes: their role in phytoplankton dynamics and ecological features

Atelomix in Ethiopian Highland Lakes: their role in phytoplankton dynamics and ecological features

Identifying Advanced Biotechnologies to Generate Biofertilizers and Biofuels From the World’s Worst Aquatic Weed

Framing water–energy–food–ecosystem (WEFE) nexus interactions in the Tana-Beles Sub-basin of Ethiopia

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