Rapid peat development beneath created, maturing mangrove forests: ecosystem changes across a 25‐yr chronosequence

Osland, Michael J.; Feher, Laura C.; Spivak, Amanda C.; Nestlerode, Janet A.; Almario, Alejandro E.; Cormier, Nicole; From, Andrew S.; Krauss, Ken W.; Russell, Marc; Álvarez, Federico; Dantin, Darrin D.; Harvey, James E.; Stagg, Camille L.

doi:10.1002/eap.2085

Cited by 49 publications

(29 citation statements)

References 81 publications

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“…While the differences in soil carbon stock between sites may be due to the diverse hydro-geomorphic settings 8 , 14 the mangrove root mass in the top 1-m were not disturbed by manual logging activities. Similar situation was found in Tampa Bay, Florida where peat formation from root mass has enhance carbon sequestration 15 . These findings reduce uncertainty around the effects of mangrove forest management on the long-term functional capacity of blue carbon storage and provide evidence that managed mangrove ecosystems may deliver nature-based climate solutions.…”

Section: Resultssupporting

confidence: 66%

Mangrove selective logging sustains biomass carbon recovery, soil carbon, and sediment

Murdiyarso

Sasmito

Sillanpää

et al. 2021

Sci Rep

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West Papua’s Bintuni Bay is Indonesia’s largest contiguous mangrove block, only second to the world’s largest mangrove in the Sundarbans, Bangladesh. As almost 40% of these mangroves are designated production forest, we assessed the effects of commercial logging on forest structure, biomass recovery, and soil carbon stocks and burial in five-year intervals, up to 25 years post-harvest. Through remote sensing and field surveys, we found that canopy structure and species diversity were gradually enhanced following biomass recovery. Carbon pools preserved in soil were supported by similar rates of carbon burial before and after logging. Our results show that mangrove forest management maintained between 70 and 75% of the total ecosystem carbon stocks, and 15–20% returned to the ecosystem after 15–25 years. This analysis suggests that mangroves managed through selective logging provide an opportunity for coastal nature-based climate solutions, while provisioning other ecosystem services, including wood and wood products.

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Section: Resultssupporting

confidence: 66%

Mangrove selective logging sustains biomass carbon recovery, soil carbon, and sediment

Murdiyarso

Sasmito

Sillanpää

et al. 2021

Sci Rep

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“…In addition to the risk that planted seedlings will be killed by extreme freezing temperatures, there is increasing evidence that salt marsh grasses (e.g., Spartina alterniflora ) are able to more effectively jump‐start coastal wetland restoration efforts compared to mangroves due to the more rapid growth, horizontal expansion and recruitment of marsh grasses compared to mangroves (specifically, A. germinans ; Yando, 2018; Yando, Osland, Jones, & Hester, 2019). Once established, planted salt marsh grasses can help trap mangrove propagules and facilitate the natural recruitment and growth of A. germinans seedlings (Donnelly, Walters, & coasts, 2014; Osland, Feher, Spivak, et al, 2020; Peterson & Bell, 2012). In physiologically challenging environments, herbaceous marsh plants have the potential to function as nurse plants that ameliorate stressful edaphic physicochemical conditions and accelerate mangrove forest development (McKee, Rooth, & Feller, 2007).…”

Section: Discussionmentioning

confidence: 99%

Frequency of extreme freeze events controls the distribution and structure of black mangroves (Avicennia germinans) near their northern range limit in coastal Louisiana

Osland

Day

Michot

2020

Diversity and Distributions

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Aim Climate change is expected to result in the tropicalization of coastal wetlands in the northern Gulf of Mexico, as warming winters allow tropical mangrove forests to expand their distribution poleward at the expense of temperate salt marshes. Data limitations near mangrove range limits have hindered understanding of the effects of winter temperature extremes on mangrove distribution and structure. Here, we investigated the influence of extreme freeze events on the abundance, height and coverage of black mangroves (Avicennia germinans) near their northern range limit in Louisiana. Location Coastal Louisiana, USA. Methods We quantified the relationships between the frequency of extreme freeze events and A. germinans abundance, height and coverage using: (a) mangrove observation points recorded via aerial surveys from a fixed‐wing aircraft; (b) 30 years of temperature data; and (c) mangrove mortality and leaf damage temperature thresholds. We used freeze frequency data and mangrove–climate relationships to evaluate and spatially depict the risk of A. germinans freeze damage across Louisiana. Results We identified strong negative relationships between the frequency of extreme freeze events and A. germinans abundance, height and coverage. Avicennia germinans is most abundant, tall and continuous along the south‐eastern outer coast of Louisiana, where the frequency of extreme freeze events is reduced (i.e., lower risk of mangrove freeze damage) by the buffering effects of comparatively warm Gulf of Mexico waters. Conversely, the risk of A. germinans freeze damage has historically been very high across Louisiana's Chenier Plain and within more inland wetlands in the Deltaic Plain. Main conclusions Our analyses advance understanding of how the frequency of extreme freeze events controls the distribution, height and coverage of A. germinans near its northern range limit. In addition to informing climate‐smart coastal restoration efforts, our findings can be used to better anticipate and prepare for the tropicalization of temperate wetlands due to climate change.

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“…It is not fully clear how mangroves will respond to restoration measures following aquaculture abandonment. Some studies have shown that there is a rapid increase in soil organic matter accumulation following mangrove restoration (Lunstrum and Chen, 2014;Osland et al, 2020) as well as aboveand below-ground biomass (Charles et al, 2020). However, this will depend on the hydrological regime, soil surface microclimate, inorganic and organic pollution levels, the relative spatiotemporal scales of mangrove vegetation change, sodicity, and sources of organic matter (whether recalcitrant or labile) (Suárez-Abelenda et al, 2013;Tran et al, 2015;Celis-Hernandez et al, 2020;Charles et al, 2020).…”

Section: Nutrient Dynamics and Eutrophicationmentioning

confidence: 99%

20-Years Cumulative Impact From Shrimp Farming on Mangroves of Northeast Brazil

Lacerda

Ward

Godoy

et al. 2021

Front. For. Glob. Change

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Brazilian mangroves cover about 11,100 km2 and provide a wide range of ecosystem services. Despite their importance, they are one of the most impacted ecosystems because of combined influences of climate change, pollution, and direct conversion and loss. A major driver of environmental impacts is shrimp farming and this is particularly acute in the semi-arid northeast of Brazil, where mangroves are constrained in a narrow band along ephemeral estuaries that are often impacted by multi-year droughts. Recent changes to Brazilian law, in particular the Forest Code, have weakened protection for mangroves and associated “apicum” (salt pan) ecosystems. In NE Brazil, most shrimp ponds are converted from mangrove-adjacent “apicuns” rather than the mangroves themselves with periodic hydrological connectivity through dammed channels, allowing the flushing of effluents. As a result, the main impacts on mangroves are typically indirect, because of pollution inputs from shrimp pond effluents and associated loss of ecosystem services including reductions in primary productivity, carbon storage capacity, resilience to other environmental stressors, their efficiency as estuarine filters, and biodiversity and abundance of subsistence use of marine species. Soil damage and infrastructure remaining after shrimp pond deactivation impairs mangrove recovery. This extends the duration of the damage and allows the occupation of degraded areas by other activities that can permanently impair ecosystem function. In this review, we address several aspects of the shrimp culture boom in NE Brazilian, their features and consequences, and the future of mangroves in the region considering climate change and rising poverty. Our conclusions on the practices and outcomes of shrimp farming in mangroves are likely to apply to areas with similar environmental settings, e.g., semiarid regions worldwide, and particularly in the Latin America and Caribbean region, and our findings can be taken into account to improve conservation and management of these forests at the least to a regional scale.

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Rapid peat development beneath created, maturing mangrove forests: ecosystem changes across a 25‐yr chronosequence

Cited by 49 publications

References 81 publications

Mangrove selective logging sustains biomass carbon recovery, soil carbon, and sediment

Mangrove selective logging sustains biomass carbon recovery, soil carbon, and sediment

Frequency of extreme freeze events controls the distribution and structure of black mangroves (Avicennia germinans) near their northern range limit in coastal Louisiana

20-Years Cumulative Impact From Shrimp Farming on Mangroves of Northeast Brazil

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