Post-spill state of the marsh: Remote estimation of the ecological impact of the Gulf of Mexico oil spill on Louisiana Salt Marshes

Mishra, Deepak R.; Cho, Hyun J.; Ghosh, Shuvankar; Fox, Amelia A. A.; Downs, Christopher C.; Merani, Paul B.T.; Kirui, Philemon; Jackson, Nick; Mishra, Sachidananda

doi:10.1016/j.rse.2011.11.007

Cited by 92 publications

(98 citation statements)

References 31 publications

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“…Therefore, we measured plant parameters only for reed and seepweed. Using 10 randomly selected reeds, we measured leaf chlorophyll concentration (SPAD-502, Konica Minolta Sensings Inc., Osaka, Japan) on the widest part of a fully expanded leaf (Mishra et al, 2012). The SPAD-502 measures chlorophyll concentrations in a range from -9.9 to 199.9 SPAD units, with an accuracy of ±1.0 SPAD units (Konica Minolta Sensing Inc., 2003).…”

Section: Plant Parametersmentioning

confidence: 99%

“…The monitoring of vegetation status under pollution is an important issue attracting attention from researchers, environmental regulators and legislators (Lin and Mendelssohn, 2012;Mishra et al, 2012). The monitoring of affected vegetation uses various methods such as sampling and chemical analysis of the soil, water, air and plants (Manzo et al, 2013;Nascimbene et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Environmental pollution affects plant physiology and growth such as biomass (Rosso et al, 2005;Splajt et al, 2003;Zhu et al, 2013) and chlorophyll content (Mishra et al, 2012;Newete et al, 2014). These parameters are closely related to the change in the canopy reflectance spectra (Rosso et al, 2005;Splajt et al, 2003;Zhu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Zhu

Chen

Wang

et al. 2014

Marine Pollution Bulletin

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a b s t r a c tTo investigate the mechanisms and potential for the remote sensing of phenanthrene-induced vegetation stress, we measured field canopy spectra, and associated plant and soil parameters in the field controlled experiment in the Yellow River Delta of China. Two widely distributed plant communities, separately dominated by reed (Phragmites australis) and glaucous seepweed (Suaeda salsa), were treated with different doses of phenanthrene. The canopy spectral changes of plant community resulted from the decreases of biomass and foliar projective coverage, while leaf photosynthetic pigment concentrations showed no significance difference among treatments. The spectral response to phenanthrene included a flattened red edge, with decreased first derivative of reflectance. The red edge slope and area consistently responded to phenanthrene, showing a strong relationship with aboveground biomass, coverage and canopy pigments density. These results suggest the potential of remote sensing and the importance of field validation to correctly interpret the causes of the spectral changes.

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Section: Plant Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Zhu

Chen

Wang

et al. 2014

Marine Pollution Bulletin

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“…However, Turpie [29] cautions that tidal flooding in the marsh can confound this method. Alternatively, many studies have used different indices and methods to track impact and recovery [30][31][32]. Hurricane impact on plant ecosystems has also been frequently mapped using remote sensing [33].…”

Section: Introductionmentioning

confidence: 99%

“…Hurricane impact on plant ecosystems has also been frequently mapped using remote sensing [33]. The Deepwater Horizon (DWH) oil spill in the Gulf of Mexico, the biggest coastal oil spill in U.S. history [34], severely impacted wetland vegetation, especially along the contaminated shoreline [13,31,32,[35][36][37]. Vegetation die-off and an increase in plant stress were observed in the intertidal marshes up to 43 m inland from the shore [30,31,38,39].…”

Section: Introductionmentioning

confidence: 99%

Marsh Loss Due to Cumulative Impacts of Hurricane Isaac and the Deepwater Horizon Oil Spill in Louisiana

et al. 2017

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Abstract:Coastal ecosystems are greatly endangered due to anthropogenic development and climate change. Multiple disturbances may erode the ability of a system to recover from stress if there is little time between disturbance events. We evaluated the ability of the saltmarshes in Barataria Bay, Louisiana, USA, to recover from two successive disturbances, the DeepWater Horizon oil spill in 2010 and Hurricane Isaac in 2012. We measured recovery using vegetation indices and land cover change metrics. We found that after the hurricane, land loss along oiled shorelines was 17.8%, while along oil-free shorelines, it was 13.6% within the first 7 m. At a distance of 7-14 m, land loss from oiled regions was 11.6%, but only 6.3% in oil-free regions. We found no differences in vulnerability to land loss between narrow and wide shorelines; however, vegetation in narrow sites was significantly more stressed, potentially leading to future land loss. Treated oiled regions also lost more land due to the hurricane than untreated regions. These results suggest that ecosystem recovery after the two disturbances is compromised, as the observed high rates of land loss may prevent salt marsh from establishing in the same areas where it existed prior to the oil spill.

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Habitat recovery and restoration in aquatic ecosystems: current progress and future challenges

Geist

Hawkins

2016

Aquatic Conservation

252

188

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ABSTRACT1. Aquatic ecosystems are degraded by a variety of pressures as a result of the growing human population. Global-scale impacts include homogenization of biological communities, removal of top predators and ecosystem engineers, chemical pollution by excess nutrients and contaminants as well as deteriorating structural diversity, connectivity and process dynamics. There is a pressing societal need to reverse the decline in biodiversity and replace lost ecosystem functioning and services in aquatic ecosystems by enabling natural recovery or by active restoration.2. Common concepts and approaches for conservation, recovery and restoration in freshwater and marine ecosystems, aided by recent advances in ecological theory, include decision criteria on priorities for conservation, harnessing natural recovery by cessation of impacts, restoring connectivity and meso-habitat diversity as well as the geomorphological structural template including hydrodynamic processes. Re-oligotrophication at catchment or regional sea-scale benefits from integrating freshwater and marine restoration. Species or assemblages that convey biogenic structure or act as ecosystem engineers and keystone species should be given priority. Top-down control can be reinstated in closed systems.3. Differences between freshwater and marine ecosystems include the greater spatial restriction of many species in fresh water, the importance of rooted vegetation and insects in freshwater, and the much greater dispersal and connectivity in marine systems. These differences dictate different approaches, with more scope for active restoration work in fresh water and harnessing natural recovery in marine systems.4. Restoration schemes need clearly defined target states. They should generally take a process-oriented and stepwise adaptive management approach judging success against reference or control sites. Societal and political expectations need to be managed and restoration schemes should not promise too much. Even minor rehabilitation of degraded ecosystems can put back some biodiversity and key services. Sometimes´Ersatz´-ecosystems are better than nothing and the best that can be achieved, especially in urban settings.

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Post-spill state of the marsh: Remote estimation of the ecological impact of the Gulf of Mexico oil spill on Louisiana Salt Marshes

Cited by 92 publications

References 31 publications

Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Marsh Loss Due to Cumulative Impacts of Hurricane Isaac and the Deepwater Horizon Oil Spill in Louisiana

Habitat recovery and restoration in aquatic ecosystems: current progress and future challenges

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