Impacts of harvesting intensity on tree taxonomic diversity, structural diversity, population structure, and stability in a West African mangrove forest

Zanvo, Mahutin Serge; Salako, Kolawolé Valère; Gnanglè, Césaire Paul; Mensah, Sylvanus; Assogbadjo, Achille Ephrem; Kakaï, Romain Glèlè

doi:10.1007/s11273-021-09793-w

Cited by 17 publications

(14 citation statements)

References 33 publications

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“…Mangroves' woods are harvested in the study mainly for domestic uses. This concurs with the ndings of previous works carried out in the reserve (Gnansounou et al, 2021, Adanguidi et al, 2020, Zanvo et al, 2021. The growing interest on mangroves' woods for domestic uses in the study sites may be due to the demographic growth currently prevailing in the reserve (Teka et al, 2018).…”

Section: Discussionsupporting

confidence: 91%

“…(Adanguidi et al, 2021). Apart from the wood collection, Acadja system also contribute signi cantly to mangrove degradation in the sub region (Zanvo et al, 2021). The technique which originated from Benin, consists of the use of mangrove branches and leaves in a demarcated area of the water body (12-16 m 2 ) to arti cially mimic sh habitats and capture them (Adite et al, 2013).…”

Section: Co-management Framework In the Mtbrmentioning

confidence: 99%

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Is the Co-management Approach Effective for Mangrove Conservation in West Africa?

Gnansounou¹,

Sagoe

Mattah

et al. 2021

Preprint

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The conservation management literature has recently documented the increasing use of co-management approach to effectively conserve natural resources. Although most research qualify the co-management as highly effective, some authors also reported a number of uncertainties associated with the use of this conservation approach. Using the Mono Transboundary Biosphere Reserve (MTBR) as a case study, this work assessed the effectiveness of the co-management towards mangroves conservation in West Africa. Data were collected in two protected sites of the reserve (one in Togo and the other in Benin). Exploratory sequential mixed method via in-depth interviews (n=17), focus group discussions (n=14), household survey (n=274) and expert-based survey (n=10) were carried out, and subjected to the InVEST-based Habitat Risk Assessment (HRA) model, chi-square test and simple probability of likelihood. Results indicated that under the current co-management regimes, the anthropogenic stressors recorded in the reserve put the entire surface area of mangroves in Benin (100%) under low risk. Contrarily, 42% of the mangrove cover are under low risk and 58% under medium risk in Togo. Local perception also portrayed a large reduction of mangrove degradation in the study sites following the adoption of the co-management approach in the two countries. This study suggests that the implementation of the co-management approach has lowered anthropogenic stressors to mangroves in the reserve. However, there are some peculiar challenges (e.g., financial support provision, regular community engagement), which need to be thoroughly researched and addressed for a more effective conservation of mangroves in the MTBR.

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Section: Discussionsupporting

confidence: 91%

Section: Co-management Framework In the Mtbrmentioning

confidence: 99%

Is the Co-management Approach Effective for Mangrove Conservation in West Africa?

Gnansounou¹,

Sagoe

Mattah

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Another major issue that needs to be addressed is related to alternative sources of wood harvested from mangroves due to the challenges of reconciling conservation and human daily needs in wood in the region. As long as sustainable alternatives are not offered to local communities, it would be difficult to eradicate the illegal harvesting of mangroves, which is a major factor of their decline in Benin (Zanvo et al, 2021). Plantations of fast-growing species as a source of firewood such as Acacia auriculiformis, which is wide spread in other regions of the country, might offer interesting alternatives.…”

Section: Implications For Conservation Of Mangrovesmentioning

confidence: 99%

Mapping spatio-temporal changes in mangroves cover and projection in 2050 of their future state in Benin

et al. 2022

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Mangroves are precious ecosystems that provide vital socio-economic, environmental and cultural benefits to humanity. However, they are declining alarmingly due to human activities and natural hazards. Assessment of their spatio-temporal dynamics is essential to monitor these ecosystems and guide their management to ensure sustainability. We assessed the spatio-temporal dynamics of mangroves and predicted their future trends using remote sensing techniques and Markovian chain analysis. Landsat images TM/ETM+ (for 1988, 2001 and 2019) were obtained, processed, classified and analyzed using remote sensing techniques and GIS. The changes observed during these periods (1988–2001, 2001-2019 and 1988–2019) were used to predict future trends up to 2050, using Markovian chain analysis. The results showed that the mangrove area studied, which occupied 5205.24 ha in 1988, declined by 62.07% between 1988 and 2001 but increased by 18.84% from 2001 to 2019. This increase is attributed to strengthened mangrove restoration efforts. The mangroves had mainly been converted into grassland (52.35% in 1988-2001 and 7.31% in 2001-2019) and other vegetation types (17.57% in 1988-2001 and 27.05% in 2001-2019). Their decline was most severe in the municipalities of Abomey-Calavi and Ouidah, which therefore require greater conservation efforts. Our projection based on Markovian chain analysis suggests that these mangroves will continue to decline, but slowly. This study provides essential information to guide future mangrove conservation action in the study area.

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“…The climate is of equatorial type with two rainy (from April to July, and from October to November) and two dry seasons (from August to September, and from December to March). The mean annual rainfall is 1200 mm (Zanvo et al, 2021). The main ethnic groups are Fon, Xwla, Pédah, Mina, Adja, Wémè, Yorouba (Teka et al 2019).…”

Section: Study Areamentioning

confidence: 99%

Ethnobotanical study of the coconut palm in the Coastal Zone of Benin

Daa-Kpode¹,

Djèdatin²,

Aide³

et al. 2021

Int. J. Biodivers. Conserv.

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The coconut palm (Cocos nucifera L.), also known as "tree of life", is widely distributed across the Coastal Zone in Benin, where its cultivation is most important. Using participatory research appraisal tools and techniques, a survey was conducted in this zone to assess the diversity of coconut ecotypes, associated endogenous knowledge and their utilization. Nineteen villages randomly selected, and comprising seven ethnic groups were surveyed. Ten different vernacular names were recorded across the study sites. The local diversity is very low. In particular, the number of ecotypes varied from 1 to 5. Moreover, recorded ecotypes were grouped in three categories including the tall ecotype known as endogenous ecotype, dwarf ecotypes known as introduced ecotypes and medium-sized ecotypes resulting from the crossing between the first two. The most important preference criteria used by producers were productivity (43%) followed by sweet taste (33%) and quantity of water (33%). Apart from being used for food, the species is also used for construction, traditional medicine, and traditional ceremonies. This study provides important information on the genetic resources of coconut palm while highlighting the socio-economic importance of the species in the Coastal Zone of Benin.

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Impacts of harvesting intensity on tree taxonomic diversity, structural diversity, population structure, and stability in a West African mangrove forest

Cited by 17 publications

References 33 publications

Is the Co-management Approach Effective for Mangrove Conservation in West Africa?

Is the Co-management Approach Effective for Mangrove Conservation in West Africa?

Mapping spatio-temporal changes in mangroves cover and projection in 2050 of their future state in Benin

Ethnobotanical study of the coconut palm in the Coastal Zone of Benin

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