Impacts of mangrove encroachment and mosquito impoundment management on coastal protection services

Doughty, Cheryl L.; Cavanaugh, Kyle C.; Hall, Carlton R.; Feller, Ilka C.; Chapman, Samantha K.

doi:10.1007/s10750-017-3225-0

Cited by 31 publications

(24 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We predict that chronic warming will act additively and perhaps synergistically with declining freeze events, which were previously shown to facilitate the poleward expansion of mangroves (Cavanaugh et al, ; Osland et al, ). In the short term, mangrove expansion and increased growth at KSC under warming conditions may provide more resistance to storms (Doughty et al, ), and surface elevation responses may enhance the sustainability of these ecotonal coastal wetlands as they face accelerating sea‐level rise in a warmer future.…”

Section: Discussionmentioning

confidence: 99%

“…As a result, mangroves are rapidly moving poleward, invading salt marsh habitat, and altering ecotonal wetland dynamics (Saintilan & Rogers, ). Displacement of salt marsh by mangroves is of growing concern and while the community and ecosystem impacts of this dramatic range shift are being assessed as a result of reduced freeze frequency (Doughty et al, ; Guo et al, ; Perry & Mendelssohn, ), few studies have examined how ongoing chronic warming will affect plant species interactions and ecosystem resilience of coastal wetlands. Our overall hypothesis was supported in that warming temperatures altered mangrove and salt marsh growth which affected surface elevation.…”

Section: Discussionmentioning

confidence: 99%

“…The reduction in the frequency of severe freeze events since a series of freeze events in 1982, 1983, 1985, and 1989 has resulted in significant shifts from salt marsh-to mangrove-dominated areas (Lonard & Judd, 1991;Osland et al, 2017;Provancha, Schmalzer, & Hall, 1986). At KSC, coastal wetlands and sand dunes help protect NASA's $5.6 billion of low-lying infrastructure against rising seas (Doughty et al, 2016;Doughty, Cavanaugh, Hall, Feller, & Chapman, 2017). Recently, Hurricane Matthew highlighted this area's vulnerability to storm surge, a threat that is compounded by ongoing sea-level rise and increased frequency of strong storms (Nicholls & Cazenave, 2010;Nicholls, Hoozemans, & Marchand, 1999).…”

Section: Study Site Descriptionmentioning

confidence: 99%

See 2 more Smart Citations

Warming accelerates mangrove expansion and surface elevation gain in a subtropical wetland

et al. 2018

Self Cite

View full text Add to dashboard Cite

Climatic warming can change how coastal wetland plants grow, thus altering their capacity to build land and keep pace with rising seas. As freeze events decline with climate change, mangroves expand their range to higher latitudes and displace salt marsh vegetation. Warmer air temperatures will likely alter above‐ and below‐ground plant dynamics as this dramatic coastal wetland biome shift proceeds, which in turn may result in changes in ecosystem function such as sediment building. We used a large scale in situ warming experiment in a subtropical wetland to increase both marsh and mangrove ecosystem air temperatures. We assessed how 2 years of continuous warming influenced above‐ and below‐ground plant growth and surface elevation relative to sea level. We found that chronic warming doubled plant height and accelerated the expansion of mangrove into salt marsh vegetation, as indicated by a sixfold greater increase in mangrove cover in warmed plots compared to ambient temperature plots and a corresponding loss in salt marsh cover. Surface elevation gain, a measure of soil‐building capacity, increased due to warming over a 2‐year period and these changes in surface elevation were driven by increased mangrove root production in warmed plots. Synthesis. Our findings suggest that, in some coastal wetlands, warming can facilitate plant community changes from marsh to mangrove, with corresponding increases in growth that help coastal wetlands to keep pace with sea‐level rise.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Study Site Descriptionmentioning

confidence: 99%

See 1 more Smart Citation

Warming accelerates mangrove expansion and surface elevation gain in a subtropical wetland

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Within different types of mangrove stands, vegetation structure affects the extent to which mangrove forests dampen waves (Bao 2011, Sánchez‐Núñez et al 2019). Mangroves and marsh plants differ dramatically in morphology, with mangroves being taller and stiffer, but having lower stem density than stands of salt marsh plants, and this in theory should affect storm protection services (Barbier et al 2013, Doughty et al 2017); however, it is uncertain whether shoreline protection services provided by these two groups of species in fact differ. Published empirical comparisons (Gedan et al 2011) have large, overlapping error bars, and are natural experiments, comparing different sites in different geographic contexts experiencing different types of wave and flow regimes; these differences obscure the effects of plant type.…”

Section: Introductionmentioning

confidence: 99%

Effects of mangrove cover on coastal erosion during a hurricane in Texas, USA

Pennings

Glazner

Hughes

et al. 2021

Ecology

View full text Add to dashboard Cite

We tested the hypothesis that mangroves provide better coastal protection than salt marsh vegetation using 10 1,008-m 2 plots in which we manipulated mangrove cover from 0 to 100%. Hurricane Harvey passed over the plots in 2017. Data from erosion stakes indicated up to 26 cm of vertical and 970 cm of horizontal erosion over 70 months in the plot with 0% mangrove cover, but relatively little erosion in other plots. The hurricane did not increase erosion, and erosion decreased after the hurricane passed. Data from drone images indicated 196 m 2 of erosion in the 0% mangrove plot, relatively little erosion in other plots, and little ongoing erosion after the hurricane. Transects through the plots indicated that the levee (near the front of the plot) and the bank (the front edge of the plot) retreated up to 9 m as a continuous function of decreasing mangrove cover. Soil strength was greater in areas vegetated with mangroves than in areas vegetated by marsh plants, or nonvegetated areas, and increased as a function of plot-level mangrove cover. Mangroves prevented erosion better than marsh plants did, but this service was nonlinear, with low mangrove cover providing most of the benefits.

show abstract

“…Coastal wetlands-defined here as salt marshes, mangroves, tidal freshwater wetlands, and tidal freshwater forests -have received some of this attention because they can act as a net-greenhouse gas sink (Howard et al 2017), and because restoration (Kroeger et al 2017) and conservation (DeLaune and White 2012) may reduce or mitigate emissions. Regulation and market mechanisms can incentivize wetland restoration to promote emission reduction (Pendleton et al 2012, Wylie et al 2016 and myriad co-benefits (Barbier et al 2011, Doughty et al 2017, Griscom et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty in United States coastal wetland greenhouse gas inventorying

Holmquist

Windham‐Myers

Bernal

et al. 2018

Environ. Res. Lett.

View full text Add to dashboard Cite

Coastal wetlands store carbon dioxide (CO 2 ) and emit CO 2 and methane (CH 4 ) making them an important part of greenhouse gas (GHG) inventorying. In the contiguous United States (CONUS), a coastal wetland inventory was recently calculated by combining maps of wetland type and change with soil, biomass, and CH 4 flux data from a literature review. We assess uncertainty in this developing carbon monitoring system to quantify confidence in the inventory process itself and to prioritize future research. We provide a value-added analysis by defining types and scales of uncertainty for assumptions, burial and emissions datasets, and wetland maps, simulating 10 000 iterations of a simplified version of the inventory, and performing a sensitivity analysis. Coastal wetlands were likely a source of net-CO 2 -equivalent (CO 2 e) emissions from 2006-2011. Although stable estuarine wetlands were likely a CO 2 e sink, this effect was counteracted by catastrophic soil losses in the Gulf Coast, and CH 4 emissions from tidal freshwater wetlands. The direction and magnitude of total CONUS CO 2 e flux were most sensitive to uncertainty in emissions and burial data, and assumptions about how to calculate the inventory. Critical data uncertainties included CH 4 emissions for stable freshwater wetlands and carbon burial rates for all coastal wetlands. Critical assumptions included the average depth of soil affected by erosion events, the method used to convert CH 4 fluxes to CO 2 e, and the fraction of carbon lost to the atmosphere following an erosion event. The inventory was relatively insensitive to mapping uncertainties. Future versions could be improved by collecting additional data, especially the depth affected by loss events, and by better mapping salinity and inundation gradients relevant to key GHG fluxes. Social Media Abstract: US coastal wetlands were a recent and uncertain source of greenhouse gasses because of CH 4 and erosion.

show abstract

Impacts of mangrove encroachment and mosquito impoundment management on coastal protection services

Cited by 31 publications

References 68 publications

Warming accelerates mangrove expansion and surface elevation gain in a subtropical wetland

Warming accelerates mangrove expansion and surface elevation gain in a subtropical wetland

Effects of mangrove cover on coastal erosion during a hurricane in Texas, USA

Uncertainty in United States coastal wetland greenhouse gas inventorying

Contact Info

Product

Resources

About