Storm-Generated Sediment Distribution Along the Northwest Florida Inner Continental Shelf

Vaughan, W. C.; Briggs, Kevin B.; Kim, Jin-Wook; Bianchi, Thomas S.; Smith, Richard

doi:10.1109/joe.2009.2014660

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…In addition to the above-mentioned mechanisms by which TCs may affect DO, hurricane-induced resuspension may also increase DO consumption. Hurricanes have the necessary spatial scale and intensity to control continental shelf sediment dynamics, for example in the Gulf of Mexico 3 , 17 – 19 , the North American Atlantic coast 20 , and other parts of the world such as the high mountainous islands of the western Pacific 7 , 21 . The strong shear stress generated by hurricane-induced currents at the bottom boundary of the shallow continental shelf can resuspend sediments from as deep as the 100 m isobath 19 , 20 and over spatial scales of kilometers 19 .…”

Section: Introductionmentioning

confidence: 99%

Contribution of hurricane-induced sediment resuspension to coastal oxygen dynamics

Bianucci

Balaguru

Smith

et al. 2018

Sci Rep

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Hurricanes passing over the ocean can mix the water column down to great depths and resuspend massive volumes of sediments on the continental shelves. Consequently, organic carbon and reduced inorganic compounds associated with these sediments can be resuspended from anaerobic portions of the seabed and re-exposed to dissolved oxygen (DO) in the water column. This process can drive DO consumption as sediments become oxidized. Previous studies have investigated the effect of hurricanes on DO in different coastal regions of the world, highlighting the alleviation of hypoxic conditions by extreme winds, which drive vertical mixing and re-aeration of the water column. However, the effect of hurricane-induced resuspended sediments on DO has been neglected. Here, using a diverse suite of datasets for the northern Gulf of Mexico, we find that in the few days after a hurricane passage, decomposition of resuspended shelf sediments consumes up to a fifth of the DO added to the bottom of the water column during vertical mixing. Despite uncertainty in this value, we highlight the potential significance of this mechanism for DO dynamics. Overall, sediment resuspension likely occurs over all continental shelves affected by tropical cyclones, potentially impacting global cycles of marine DO and carbon.

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Section: Introductionmentioning

confidence: 99%

Contribution of hurricane-induced sediment resuspension to coastal oxygen dynamics

Bianucci

Balaguru

Smith

et al. 2018

Sci Rep

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“…Hebert et al (2003b) found the mean divergence for COX-1 in echinoderms was 10.9%, which suggests that if L. clathrata and L. lawrencei are separate species per cent divergence within this gene would be expected to exceed 10%. Sand tends to be finer in estuaries, and coarser, as well as mixed with shell fragments, offshore (Swift et al , 1991; McManus, 1998; Vaughan et al , 2009; Williams et al , 2012). Salinity can be highly variable and lower in estuaries compared with offshore areas (Boyer et al , 2005; Telesh & Khlebovich, 2010).…”

Section: Introductionmentioning

confidence: 99%

Sediment preference, salinity tolerance and COX-1 genetic differences in two purportive species ofLuidia(Echinodermata: Asteroidea)

2014

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Specimens collected in or near Pensacola Bay, Florida matching the descriptions of Luidia lawrencei and Luidia clathrata (the congener from which L. lawrencei was recently split) were compared to determine whether their recent taxonomic separation is supported by differences in sediment preference, salinity tolerance and COX-1 mtDNA sequences. Luidia clathrata has a preference for smaller grain sizes, while no statistically significant preference was found for Luidia lawrencei, and no significant difference was found between the species. Luidia clathrata is more tolerant of lower salinity based on the righting response than Luidia lawrencei, especially at salinities lower than 25 g kg−1. The COX-1 comparison returned over 99% homology among individuals of the two species. While sediment preference and salinity tolerance results indicate differences in response to habitat dissimilarities, the COX-1 genetic result is strong evidence against the recently proposed separation of the species. In light of the COX-1 result, we interpret the sediment and salinity results as long-term acclimation responses.

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Feedback between ridge and swale bathymetry and barrier island storm response and transgression

Houser

2012

Geomorphology

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Storm-Generated Sediment Distribution Along the Northwest Florida Inner Continental Shelf

Cited by 10 publications

References 32 publications

Contribution of hurricane-induced sediment resuspension to coastal oxygen dynamics

Contribution of hurricane-induced sediment resuspension to coastal oxygen dynamics

Sediment preference, salinity tolerance and COX-1 genetic differences in two purportive species ofLuidia(Echinodermata: Asteroidea)

Feedback between ridge and swale bathymetry and barrier island storm response and transgression

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