Écologie et dynamique spatio-temporelle des mangroves au Togo

Folega, Fousséni; Andrianamenoso, Rakotondrasoa Miaratiana; Wala, Kpérkouma; Agbelessessi, Woegan Y.; Kanda, Manabu; Pereki, Hodabalo; Polo-Akpisso, Aniko; Batawila, Komlan; Akpagana, Koffi

doi:10.4000/vertigo.18791

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…4), the phosphorus contents of two market garden sites were higher than those of the markets, i. Phosphorus contents of I. batatas leaves in this study are in the range of results obtained by [23] on leaves of 40 sweet potato varieties (131.1 ± 3.3 -2639.8 ± 1.3 mg/100 g DW). Phosphorus contents in this study are higher than those obtained by [35] for Haematostaphis harteri (340mg/100 g) in Togo and by [36] for amaranth crop (86.19mg/100 g). However, these results are lower than those obtained by [37] for C. rubens (1409mg/100g) and C. crepidioides (1039.2mg/100g) and by [31], for African nightshade leaves (2229mg/100g), for Cleome gynandra (2223mg/100g) and for Corchorus olitorius (2262mg/100g).…”

Section: Phosphorus Contentcontrasting

confidence: 83%

Nutritional Study of Four Leafy Vegetables Produced and Sold in the Southern Zone of Brazzaville (Republic of Congo)

Breve,

Josiane,

Tsieri

2023

AFSJ

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Generally overlooked by consumers, many local leafy vegetables in the Republic of Congo are considered to be part of the rural way of life and “poor man's food”. In order to promote their consumption, this study was carried out to assess the nutrient composition of four leafy vegetables (Amaranthus hybridus L, Basella alba, Solanum nigrum L and Ipomea batatas L). The leafy vegetables were collected from two markets and two market garden sites. The pH and the contents in moisture, protein, ash, lipids and minerals (Ca, P, Fe and Mg) were determined using standard analytical methods (Association of Official Analytical Chemists). The results indicate that the four leafy vegetables have a pH of between 6 ± 0.03 and 7 ± 0.04, high moisture content (81.43 ± 0.20 to 94.89 ± 0.12 g/100g FW), high protein content (21.95 ± 0.05 to 32.59 ± 0.07 g/100g FW) and high ash content (13.32 ± 0.05 to 25.78 ± 0.03 g/100g FW). All the vegetables were low in lipids (between 2.73 ± 0.23 and 4.81 ± 0.20 g/100gDW). The investigations also show that the four vegetables studied have high levels of phosphorus (389.27 ± 3.23% to 875.22 ± 3.16 mg/100 g DM), iron (70.29 ± 0.15 to 180.06 ± 1.21 mg/100 g DM), calcium (106.78 ± 3.25 to 3404.57 ± 8.07 mg/100 g DM) and magnesium (679.20 ± 2.25 to 2331.25 ± 3.26 mg/100 g DM). In addition, the vegetables collected at the market garden site of the municipal garden had the best a best Ca/P ratio (2.56 to 4.59). These findings suggest that these leafy vegetables represent a genuine alternative source of protein and especially micronutrients (iron, phosphorus, calcium, magnesium) for human nutrition, health and food safety.

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Section: Phosphorus Contentcontrasting

confidence: 83%

Nutritional Study of Four Leafy Vegetables Produced and Sold in the Southern Zone of Brazzaville (Republic of Congo)

Breve,

Josiane,

Tsieri

2023

AFSJ

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“…Other provisioning services highly ranked in the reserve are timber collection and firewood collection. Even if mangrove cutting is officially banned in the two countries [12,34], the local population in the MTBR still collects firewood and timber from mangroves for diverse domestic and commercial uses. This illustrates a weak enforcement of the conservation measures put in place for mangroves protection in the reserve.…”

Section: Predominance Of Mangrove Es In the Mtbrmentioning

confidence: 99%

Mangrove Ecosystem Services, Associated Threats and Implications for Wellbeing in the Mono Transboundary Biosphere Reserve (Togo-Benin), West-Africa

et al. 2022

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Mangroves are important coastal ecosystems, which deliver diverse and crucial services to humans. This study explored the diversity of mangrove ecosystem services, their associated threats as well as their contribution to livelihoods and wellbeing of coastal communities in the Mono Transboundary Biosphere Reserve (MTBR) located between Benin and Togo. Data were collected using the exploratory sequential mixed method. The approach included field reconnaissance, focus group discussions (n = 14), in-depth interviews (n = 17), household survey (n = 274) and direct observations. A total of 21 services and 7 associated threats were recorded in the entire reserve. Provisioning services were the most important service for mangroves in the reserve followed by supporting services, regulating services and cultural services. Change in water salinity, mangrove overharvesting and illegal, unreported and unregulated fishing were the three major threats to mangrove ecosystem services in the reserve. Most of the respondents indicated that the current flow of provisioning services, regulating services and cultural services does not sustain their wellbeing and livelihoods. However, the perception varied significantly across respondents’ gender, ethnical groups, educational background and country. Our study showed some similarities between the two countries but also highlighted important differences which can assist the sustainable management of mangroves in the MTBR.

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“…The maximum likelihood algorithm was used for the classification of these images and to produce maps of class distributions. The maximum likelihood method is widely used [26,41,[47][48][49] because of its ability to classify pixels on a probabilistic basis by highlighting the standard margin of error between pixel values and those of different areas of interest [50]. Preclassification operations making radiometric and geometric corrections using ENVI software served to improve the quality of the images before processing.…”

Section: _01_t1mentioning

confidence: 99%

“…The need for service and fuel wood, agricultural land, and buildings is at the heart of the multifaceted pressures on forests and land cover change. Population growth appears to be the main factor in the degradation of mangroves [50,56]. On Manoka Island, the population in 1976 was 750 inhabitants but it was 1399 in 2005, while that of the city of Douala increased from 458,426 inhabitants to 1,907,479 inhabitants in the same period [62].…”

Section: Human Pressure Due To Population Growthmentioning

confidence: 99%

Land Cover and Land Use Changes between 1986 and 2018, and Preliminary Carbon Footprint Implications for Manoka Island (Littoral Region of Cameroon)

Tagne

Sonwa²,

Awono³

et al. 2022

Sustainability

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Land and resource use patterns in coastal areas play a key role in the resilience of ecosystems and populations to climate change. Knowing their spatiotemporal dynamics therefore constitutes a strategic tool to help decision-makers. Based on documentary research, geographic information system (GIS), image processing, and field work, this article maps land use on Manoka Island between 1986 and 2018 and identifies the drivers of change and avenues for intervention with a view to strengthening climate change mitigation. The results show a decrease of 4% in forest area on Manoka Island, representing an average of 112 ha of inland forest and 267 ha of mangrove converted between 1986 and 2018. This increases the degraded forest area by 268% (degraded mangrove and degraded inland forest) and exposes some camps to erosion and flooding. Reduction in forest area is mainly linked to the harvesting of fuelwood and the conversion of forests into farmland and residential areas. Settlements have increased in area from 15 ha in 1986 to 90.4 ha in 2018 to the detriment of natural spaces.

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Écologie et dynamique spatio-temporelle des mangroves au Togo

Cited by 8 publications

References 3 publications

Nutritional Study of Four Leafy Vegetables Produced and Sold in the Southern Zone of Brazzaville (Republic of Congo)

Nutritional Study of Four Leafy Vegetables Produced and Sold in the Southern Zone of Brazzaville (Republic of Congo)

Mangrove Ecosystem Services, Associated Threats and Implications for Wellbeing in the Mono Transboundary Biosphere Reserve (Togo-Benin), West-Africa

Land Cover and Land Use Changes between 1986 and 2018, and Preliminary Carbon Footprint Implications for Manoka Island (Littoral Region of Cameroon)

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