The Mangroves of Ambanja and Ambaro Bays, Northwest Madagascar: Historical Dynamics, Current Status and Deforestation Mitigation Strategy

Jones, Trevor; Ratsimba, Harifidy Rakoto; Carro, Aude; Ravaoarinorotsihoarana, Lalao; Glass, Leah; Teoh, Marianne; Benson, Lisa; Cripps, Garth; Giri, Chandra; Zafindrasilivonona, Bienvenue; Raherindray, Raymond; Andriamahenina, Zo; Andriamahefazafy, Mialy

doi:10.1007/978-3-319-25370-1_5

Cited by 10 publications

(17 citation statements)

References 31 publications

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“…The remote sensing analysis indicated an overall net loss of 3.18% between 2002 and 2014. This is comparable to losses reported in Mahajamba Bay [27], but substantially lower than those estimated in the Ambaro-Ambanja Bays in northwest Madagascar [24,25]. However, because the net loss figures only account for total deforestation-mangrove classes transitioning to non-vegetated classes-these figures alone do not accurately reflect the extent of mangrove exploitation within the bay.…”

Section: Discussioncontrasting

confidence: 50%

“…Although soil carbon stocks were comparable, total carbon stocks were also lower than values estimated by other mangrove carbon inventories carried out in East Africa in recent years [25,26] (Figure 10). The difference in total stocks is mostly due to lower vegetation carbon values owing to the comparably smaller stature of mangroves in Helodrano Fagnemotse, which is most likely due to the climatic differences between the study areas.…”

Section: Discussionmentioning

confidence: 52%

“…In addition, despite extensive national legislation Figure 10. Ecosystem carbon densities up to a soil depth of 1 m reported for carbon inventories in the Dominican Republic [62], Palau, Micronesia [63], the Zamezi Delta, Mozambique [26], Ambaro-Ambanja Bay, Madagascar [25] and Helodrano Fagnemotse from this study. Grey shading indicates studies in the Western Indian Ocean.…”

Section: Discussionmentioning

confidence: 53%

“…Species specific allometric equations were chosen based on the region in which they were developed. The parameters used to derive them and have previously been reported, along with wood density values, by Jones et al [25,27]. Belowground biomass was estimated using the standard equation by Komiyama et al [36].…”

Section: Tree Biomassmentioning

confidence: 99%

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Mangrove Carbon Stocks and Ecosystem Cover Dynamics in Southwest Madagascar and the Implications for Local Management

Benson

Glass

Jones

et al. 2017

Forests

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Abstract:Of the numerous ecosystem services mangroves provide, carbon storage is gaining particular attention for its potential role in climate change mitigation strategies. Madagascar contains 2% of the world's mangroves, over 20% of which is estimated to have been deforested through charcoal production, timber extraction and agricultural development. This study presents a carbon stock assessment of the mangroves in Helodrano Fagnemotse in southwest Madagascar alongside an analysis of mangrove land-cover change from 2002 to 2014. Similar to other mangrove ecosystems in East Africa, higher stature, closed-canopy mangroves in southwest Madagascar were estimated to contain 454.92 (±26.58) Mg·C·ha −1 . Although the mangrove extent in this area is relatively small (1500 ha), these mangroves are of critical importance to local communities and anthropogenic pressures on coastal resources in the area are increasing. This was evident in both field observations and remote sensing analysis, which indicated an overall net loss of 3.18% between 2002 and 2014. Further dynamics analysis highlighted widespread transitions of dense, higher stature mangroves to more sparse mangrove areas indicating extensive degradation. Harnessing the value that the carbon stored within these mangroves holds on the voluntary carbon market could generate revenue to support and incentivise locally-led sustainable mangrove management, improve livelihoods and alleviate anthropogenic pressures.

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Section: Discussioncontrasting

confidence: 50%

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 53%

Section: Tree Biomassmentioning

confidence: 99%

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Mangrove Carbon Stocks and Ecosystem Cover Dynamics in Southwest Madagascar and the Implications for Local Management

Benson

Glass

Jones

et al. 2017

Forests

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“…As presented in Jones et al [61,62], and representing the first total carbon stock estimates for a mangrove ecosystem in Madagascar, total carbon stock estimates in AAB varied from 126. 42 (Figure 11).…”

Section: Application Of Mapping Resultsmentioning

confidence: 99%

Madagascar’s Mangroves: Quantifying Nation-Wide and Ecosystem Specific Dynamics, and Detailed Contemporary Mapping of Distinct Ecosystems

et al. 2016

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Mangrove ecosystems help mitigate climate change, are highly biodiverse, and provide critical goods and services to coastal communities. Despite their importance, anthropogenic activities are rapidly degrading and deforesting mangroves world-wide. Madagascar contains 2% of the world's mangroves, many of which have undergone or are starting to exhibit signs of widespread degradation and deforestation. Remotely sensed data can be used to quantify mangrove loss and characterize remaining distributions, providing detailed, accurate, timely and updateable information. We use USGS maps produced from Landsat data to calculate nation-wide dynamics for Madagascar's mangroves from 1990 to 2010, and examine change more closely by partitioning the national distribution in to primary (i.e., >1000 ha) ecosystems; with focus on four Areas of Interest (AOIs): Ambaro-Ambanja Bays (AAB), Mahajamba Bay (MHJ), Tsiribihina Manombolo Delta (TMD) and Bay des Assassins (BdA). Results indicate a nation-wide net-loss of 21% (i.e., 57,359 ha) from 1990 to 2010, with dynamics varying considerably among primary mangrove ecosystems. Given the limitations of national-level maps for certain localized applications (e.g., carbon stock inventories), building on two previous studies for AAB and MHJ, we employ Landsat data to produce detailed, contemporary mangrove maps for TMD and BdA. These contemporary, AOI-specific maps provide improved detail and accuracy over the USGS national-level maps, and are being applied to conservation and restoration initiatives through the Blue Ventures' Blue Forests programme and WWF Madagascar West Indian Ocean Programme Office's work in the region.

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Losses of Soil Organic Carbon with Deforestation in Mangroves of Madagascar

Arias‐Ortiz

Masqué

Glass³

et al. 2020

Ecosystems

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The Mangroves of Ambanja and Ambaro Bays, Northwest Madagascar: Historical Dynamics, Current Status and Deforestation Mitigation Strategy

Cited by 10 publications

References 31 publications

Mangrove Carbon Stocks and Ecosystem Cover Dynamics in Southwest Madagascar and the Implications for Local Management

Mangrove Carbon Stocks and Ecosystem Cover Dynamics in Southwest Madagascar and the Implications for Local Management

Madagascar’s Mangroves: Quantifying Nation-Wide and Ecosystem Specific Dynamics, and Detailed Contemporary Mapping of Distinct Ecosystems

Losses of Soil Organic Carbon with Deforestation in Mangroves of Madagascar

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