Mangrove Restoration Under Shifted Baselines and Future Uncertainty

Dahdouh‐Guebas, Farid; Cannicci, Stefano

doi:10.3389/fmars.2021.799543

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…According to Watts and Stenner (2012), we started extracting one factor for 6-8 participants (n = 23). We accepted factors that had two or more significant factor loadings at p < 0.01, and their eigenvalues were more than one, according to the Kaiser-Guttman criterion (Brown 1980;Watts & Stenner 2012). We then rotated factors using Varimax rotation (Hugé et al 2016) to maximize explained variance while retaining orthogonal axes.…”

Section: Stage 3: Analysismentioning

confidence: 99%

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Stakeholder perceptions on Community‐Based Ecological Mangrove Restoration (CBEMR): a case study in Thailand

Lhosupasirirat

Dahdouh‐Guebas

Hugé

et al. 2023

Restoration Ecology

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Mangroves are a unique ecosystem that provides various benefits to people. In Thailand, Mangrove Action Project (MAP) has introduced Community‐Based Ecological Mangrove Restoration (CBEMR), a novel technique to restore degraded mangroves. Unlike conventional tree planting, CBEMR does not require a planting phase. It emphasizes preproject assessments of mangrove ecology and hydrology to facilitate natural regeneration. Therefore, this study aims to (1) investigate the perception of stakeholders on the value of mangroves; (2) examine the understanding of stakeholders on conventional mangrove planting and CBEMR as mangrove restoration techniques; (3) understand the challenges and motivations of the CBEMR efforts in the Andaman Coast of Southern Thailand. We use Q Methodology, a semi‐quantitative method that requires participants to rank a set of statements to analyze their perceptions according to the research questions. As a result, we can identify three clusters of perceptions; D1 demands more CBEMR and less conventional planting. D2 believes mangrove planting is good, given suitable conditions. D3 thinks restoring mangroves brings benefits, but most conventional planting often fails. This study highlighted that all CBEMR stakeholders believe inadequate technical knowledge is the root cause of mismatch restoration practices. Mangrove planting should be done with suitable species, conditions, and areas. Conventional planting of mangroves without considering ecological factors and local engagement should be avoided as it fails to achieve sustainable outcomes. Enhancing knowledge of mangrove ecology and restoration techniques is therefore a sustainable route to the long‐term success of mangrove restoration in Thailand.

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Section: Stage 3: Analysismentioning

confidence: 99%

“…Mangroves are unique ecosystems, that can be found in intertidal zones (Dahdouh‐Guebas & Cannicci 2021). Most mangrove forests are distributed along the coastline in tropical and subtropical countries (FAO 2007).…”

Section: Introductionmentioning

confidence: 99%

Stakeholder perceptions on Community‐Based Ecological Mangrove Restoration (CBEMR): a case study in Thailand

Lhosupasirirat

Dahdouh‐Guebas

Hugé

et al. 2023

Restoration Ecology

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“…They also underpin many important ecosystem functions and services such as primary and secondary productivity, C sequestration (acting as a "blue carbon" storage system; Duarte, 2017), the provision of nursery areas for endangered and commercially important species, protection from coastal erosion (Duffy et al, 2019). However, these meadows/forests are facing dramatic decline worldwide, so effective restoration efforts are urgently needed to recover their associated key ecosystem functions and services (Paling et al, 2009;Tan et al, 2020;Cebrian et al, 2021;Dahdouh-Guebas and Cannicci, 2021;Dunic et al, 2021). We detail below the general characteristics of the microbiomes of these vegetated ecosystems and perspectives for their potential application to the restoration of such habitats.…”

Section: Restoration Of Vegetated Habitats: Seagrass Meadows Mangrove...mentioning

confidence: 99%

Microbiome-assisted restoration of degraded marine habitats: a new nature-based solution?

Corinaldesi,

Bianchelli,

Candela

et al. 2023

Front. Mar. Sci.

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Microorganisms interact with all biological components in a variety of ways. They contribute to increase the efficiency of marine food webs and facilitate the adaptation of multicellular organisms to climate change and other human-induced impacts. Increasing evidence suggests that microbiomes are essential for the health of marine species, for maintaining productive marine ecosystems, and thus for the sustainable functioning of the global biosphere. Marine microbiomes are typically species- or habitat-specific and are susceptible to environmental and human-driven changes. The microbiota of seagrasses, macroalgae, mangroves or tropical corals benefits their hosts by increasing their fitness, contributing to the removal of toxic compounds, conferring protection against pathogens, and/or supporting nutrient requirements. Alterations of the microbiomes might have negative consequences on species’ health, survival, and overall ecosystem functioning. Despite the key ecological role of microbiomes in all ecosystems, their potential for the restoration of degraded habitats is still largely unexplored. Here we present a literature survey of the existing information on the microbiota associated with habitat-forming species and suggest that the resilience/recovery of damaged marine habitats can depend largely on the changes in the microbiota. Nature-based solutions relying on microbiome analyses (also through omics approaches) enable health monitoring of transplanted organisms/metacommunities and potential identification/production of probiotics/bio-promoters to stabilize unhealthy conditions of transplants. In the context of international strategies concerning ecological restoration, the use of the scientific knowledge acquired on the marine microbiome deserves to be exploited to assist both traditional and innovative restoration approaches. The success of habitat restoration may depend on our ability to maintain, along with the restored species and habitats, a functional microbiota.

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“…As a result, most global and regional mangrove mapping efforts only date back to 2000, with a few extending into the 1990s (Bunting et al, 2022;Murillo-Sandoval et al, 2022;Hamilton and Stankwitz, 2012), which can influence conservation decision making and outcomes (Friess and Webb, 2014;Hamilton et al, 2018;Dahdouh-Guebas and Cannicci, 2021). One such study (Dahdouh-Guebas and Cannicci, 2021) made the distinction that a variety of rehabilitation and restoration targets on mangrove health assessments rely on the earliest available earth observation or past vegetation dataset to establish which areas can be sustainably rejuvenated and which are a restoration priority (Wang et al, 2019;Dahdouh-Guebas and Cannicci, 2021). Although mangrove remote sensing can be traced back to the 1970s (Kuenzer et al, 2011), they are few, the majority were completed without accuracy assessments, or were restricted to sub-regional spatial coverages (Lorenzo et al, 1979;Lewis and MacDonald, 1972;Everitt and Judd, 1989;Islam et al, 2019;Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…This study therefore chose to assess historical rates of mangrove change in the mainland of Southeast Asia where LMSS scenes were available and of sufficient quality. An older and effective mangrove extent baseline would supplement management activities with updated baselines when reporting on mangrove change dynamics (Kodikara et al, 2017;Chakraborty et al, 2019;Dahdouh-Guebas and Cannicci, 2021). Although the work of updating mangrove extent baselines will need additional studies to not run the risk of skewing future mangrove change projections…”

Section: Introductionmentioning

confidence: 99%

A regional map of mangrove extent for Myanmar, Thailand, and Cambodia shows losses of 44% by 1996

et al. 2023

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Southeast Asia is home to some of the planet’s most carbon-dense and biodiverse mangrove ecosystems. There is still much uncertainty with regards to the timing and magnitude of changes in mangrove cover over the past 50 years. While there are several regional to global maps of mangrove extent in Southeast Asia over the past two decades, data prior to the mid-1990s is limited due to the scarcity of Earth Observation (EO) data of sufficient quality and the historical limitations to publicly available EO. Due to this literature gap and research demand in Southeast Asia, we conducted a classification of mangrove extent using Landsat 1-2 MSS Tier 2 data from 1972 to 1977 for three Southeast Asian countries: Myanmar, Thailand, and Cambodia. Mangrove extent land cover maps were generated using a Random Forest machine learning algorithm that effectively mapped a total of 15,420.51 km2. Accuracy assessments indicated that the classification for the mangrove and non-mangrove class had a producer’s accuracy of 80% and 98% user’s accuracy of 90% and 96%, and an overall accuracy of 95%. We found a decline of 6,830 km2 between the 1970s and 2020, showing that 44% of the mangrove area in these countries has been lost in the past 48 years. Most of this loss occurred between the 1970s and 1996; rates of deforestation declined dramatically after 1996. This study also elaborated on the nature of mangrove change within the context of the social and political ecology of each case study country. We urge the remote sensing community to empathetically consider the local need of those who depend on mangrove resources when discussing mangrove loss drivers.

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Mangrove Restoration Under Shifted Baselines and Future Uncertainty

Cited by 9 publications

References 23 publications

Stakeholder perceptions on Community‐Based Ecological Mangrove Restoration (CBEMR): a case study in Thailand

Stakeholder perceptions on Community‐Based Ecological Mangrove Restoration (CBEMR): a case study in Thailand

Microbiome-assisted restoration of degraded marine habitats: a new nature-based solution?

A regional map of mangrove extent for Myanmar, Thailand, and Cambodia shows losses of 44% by 1996

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