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Lucas, Richard; Ellison, JC; Mitchell, A. R.; Donnelly, Brian; Finlayson, C. Max; Milne, A.K.

doi:10.1023/a:1016547214434

Cited by 57 publications

(7 citation statements)

References 22 publications

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“…Spatial analysis can identify and quantify mangrove retreat at the seaward edge, recruitment inland [78,79,80] or stability of mangrove distributions. Vulnerability is shown by change in mangrove area over time, caused by both human impacts and influences such as sea level rise.…”

Section: Discussionmentioning

confidence: 99%

Vulnerability to Climate Change of Mangroves: Assessment from Cameroon, Central Africa

Ellison

Zouh

2012

Biology

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Intertidal mangrove ecosystems are sensitive to climate change impacts, particularly to associated relative sea level rise. Human stressors and low tidal range add to vulnerability, both characteristics of the Doula Estuary, Cameroon. To investigate vulnerability, spatial techniques were combined with ground surveys to map distributions of mangrove zones, and compare with historical spatial records to quantify change over the last few decades. Low technology techniques were used to establish the tidal range and relative elevation of the mapped mangrove area. Stratigraphic coring and palaeobiological reconstruction were used to show the longer term biological history of mangroves and net sedimentation rate, and oral history surveys of local communities were used to provide evidence of recent change and identify possible causes. Results showed that the seaward edge of mangroves had over two thirds of the shoreline experienced dieback at up to 3 m per year over the last three decades, and an offshore mangrove island had suffered 89% loss. Results also showed low net sedimentation rates under seaward edge mangroves, and restricted intertidal elevation habitats of all mangroves, and Avicennia and Laguncularia in particular. To reduce vulnerability, adaptation planning can be improved by reducing the non-climate stressors on the mangrove area, particularly those resulting from human impacts. Other priorities for adaptation planning in mangrove areas that are located in such low tidal range regions are to plan inland migration areas and strategic protected areas for mangroves, and to undertake management activities that enhance accretion within the mangroves.

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Section: Discussionmentioning

confidence: 99%

Vulnerability to Climate Change of Mangroves: Assessment from Cameroon, Central Africa

Ellison

Zouh

2012

Biology

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“…Even when the extent of mangrove forest remains constant, its structure and biomass may change. For this reason, estimates of canopy cover, height and AGB of mangroves obtained primarily from stereo imagery (Lucas et al 2002;Mitchell et al 2007), lidar and/or InSAR are required. Validation of change also needs to be achievable, particularly if undertaken at a global level.…”

Section: Validationmentioning

confidence: 99%

Contribution of L-band SAR to systematic global mangrove monitoring

Lucas

Rebelo

Fatoyinbo

et al. 2014

Mar. Freshwater Res.

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cited By 8Information on the status of and changes in mangroves is required for national and international policy development, implementation and evaluation. To support these requirements, a component of the Japan Aerospace Exploration Agency?s (JAXA) Kyoto and Carbon (K&C) initiative has been to design and develop capability for a Global Mangrove Watch (GMW) that routinely monitors and reports on local to global changes in the extent of mangroves, primarily on the basis of observations by Japanese L-band synthetic aperture radar (SAR). The GMW aims are as follows: (1) to map progression of change within or from existing (e.g. Landsat-derived) global baselines of the extent of mangroves by comparing advanced land-observing satellite 2 (ALOS-2) phased array L-band SAR 2 (PALSAR-2) data from 2014 with that acquired by the Japanese earth resources satellite (JERS-1) SAR (1992?1998) and ALOS PALSAR (2006?2011); (2) to quantify changes in the structure and associated losses and gains of carbon on the basis of canopy height and above-ground biomass (AGB) estimated from the shuttle radar topographic mission (SRTM; acquired 2000), the ice, cloud and land-elevation satellite (ICESAT) geoscience laser altimeter system (GLAS; 2003?2010) and L-band backscatter data; (3) to determine likely losses and gains of tree species diversity through reference to International Union for the Conservation of Nature (IUCN) global thematic layers on the distribution of mangrove species; and (4) to validate maps of changes in the extent of mangroves, primarily through comparison with dense time-series of Landsat sensor data and to use these same data to describe the causes and consequences of change. The paper outlines and justifies the techniques being implemented and the role that the GMW might play in supporting national and international policies that relate specifically to the long-term conservation of mangrove ecosystems and the services they provide to society.Peer reviewe

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“…Spatially explicit analyses of boundary changes of mangroves over time is a powerful tool that can help allocate limited resources through planning and implementation of conservation measures to vulnerable areas where mangroves are particularly threatened by natural and human-induced hazards [23,70,71]. The calculated LRR values of changes in boundaries varied among and within regions and revealed that some borders of the mangroves progressed toward the sea (sedimentation), while others regressed (erosion) and led to boundary contractions and loss of mangroves at the seaedge.…”

Section: -Resultsmentioning

confidence: 99%

Monitoring Long-term Mangrove Shoreline Changes along the Northern Coasts of the Persian Gulf and the Oman Sea

Mafi-Gholami

Baharlouii

2019

Emerg Sci J

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Generally, investigating changes in mangrove shorelines is an important step to evaluate whether mangrove ecosystems are expanding or contracting. In this study, the rates of change of mangrove boundaries were investigated along the coasts of the Persian Gulf and the Oman Sea, over a 30-year period. Seaward edges of mangrove forests were extracted from Landsat images of the years 1986, 2000 and 2016 and the Digital Shoreline Analysis System (DSAS) Software was used to implement the Linear Regression Rate (LRR) method to quantify the rates of boundary changes. On average, areas that experienced boundary expansion progressed by 2.55 m yr -1 and those that experienced contraction regressed by -0.38 m yr -1 . The maximum rate of expansion was 25.91 m yr -1 and the maximum rate of contraction was -22.45 m yr -1 . Mangroves located on the coasts of the Persian Gulf exhibited differential rates of progression and regression at their borders, with expansion rates increasing in an eastward direction toward the coasts of the Oman Sea. However, on the eastern coasts of the Oman Sea, mangroves are characterized by contraction and erosion. 1-IntroductionAmong the natural sub-systems located along the world's shorelines, mangrove forests straddle both marine and terrestrial ecosystems and provide a diverse range of goods and services such as the provision of wood and marine products, prevention of damage caused by storms, provision of flood control, protection of coastlines, and control of coastal erosion, waste assimilation, recreation, and transportation required by coastal communities [1][2][3][4][5]. For thousands of years, these forests have played a major role in the economies of human societies, sustaining people's livelihoods [6,7]. Despite the importance of these ecosystem services for meeting human needs, degradation and loss of these unique coastal habitats around the world have been intensified over the past three decades, so that more than 50% of the world's mangrove forests have already been destroyed and the trend is still continuing [8]. Loss of a wide range of goods and services provided by this ecosystem as well as enhanced risk to mangrove-dependent human communities are the direct results of the destruction and loss of mangrove ecosystems [9][10][11][12]. This calls for the development of effective planning and management strategies to conserve and restore mangrove ecosystems, which has become elevated to one of the main objectives for decision makers and managers of natural resources responsible for sustaining mangrove ecosystems. One way to achieve these goals is to first assess whether, and if so, how mangrove shorelines have changed over time. Such a dynamic change of coastal areas would be a powerful indicator for the degree of vulnerability and responsiveness of mangroves to stresses induced by climate change [13][14][15].Mangroves on the coast of the Persian Gulf and the Oman Sea are one of the most important remaining mangrove habitats in the Middle East and cover an area of approximately 427 km 2 a...

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Untitled

Cited by 57 publications

References 22 publications

Vulnerability to Climate Change of Mangroves: Assessment from Cameroon, Central Africa

Vulnerability to Climate Change of Mangroves: Assessment from Cameroon, Central Africa

Contribution of L-band SAR to systematic global mangrove monitoring

Monitoring Long-term Mangrove Shoreline Changes along the Northern Coasts of the Persian Gulf and the Oman Sea

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