Publications
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Filter Total Items: 919
A 3,000‐year lag between the geological and ecological shutdown of Florida's coral reefs
The global‐scale degradation of coral reefs has reached a critical threshold wherein further declines threaten both ecological functionality and the persistence of reef structure. Geological records can provide valuable insights into the long‐term controls on reef development that may be key to solving the modern coral‐reef crisis. Our analyses of new and existing coral‐reef cores from throughout
Authors
Lauren Toth, Ilsa B. Kuffner, Anastasios Stathakopoulos, Eugene A. Shinn
Nearshore single-beam bathymetry data collected in 2015, Dauphin Island, Alabama
Dauphin Island, Alabama, is a barrier island located in the northern Gulf of Mexico that supports local residences, tourism, commercial infrastructure, and historic Fort Gaines. During the past decade, Dauphin Island was affected by several major hurricanes—Hurricanes Ivan (2004), Katrina (2005), and Isaac (2012)—and storms, along with sea-level rise, continue to present a threat to island stabili
Authors
Nancy T. DeWitt, Chelsea A. Stalk, James G. Flocks, Julie Bernier, Kyle W. Kelso, Jake J. Fredericks, Thomas M. Tuten
Field observations of alongshore runup variability under dissipative conditions in presence of a shoreline sandwave
Video measurements of runup were collected at low tide along several profiles covering an alongshore distance of 500 m. The morphology displayed a complex shape with a shoreline sandwave in the lower beach face of about 250 m long mirrored in the inner sandbar. Wave conditions were stationary and moderate (offshore height of 2 m and peak period of nearly 13 s) but yet dissipative. Runup energy was
Authors
Nadia Senechal, Giovanni Coco, Nathaniel G. Plant, Karin R. Bryan, Jennifer Brown, Jamie MacMahan
Hydrodynamics and sediment mobility processes over a degraded senile coral reef
Coral reefs can influence hydrodynamics and morphodynamics by dissipating and refracting incident wave energy, modifying circulation patterns, and altering sediment transport pathways. In this study, the sediment and hydrodynamic response of a senile (dead) barrier reef (Crocker Reef, located in the upper portion of the Florida Reef Tract) to storms and quiescent conditions was evaluated using fie
Authors
Legna M. Torres-Garcia, P. Soupy Dalyander, Joseph W. Long, David G. Zawada, Kimberly K. Yates, Christopher Moore, Maitane Olabarrieta
Effects of proposed navigation channel improvements on sediment transport in Mobile Harbor, Alabama
A Delft3D model was developed to evaluate the potential effects of proposed navigationchannel deepening and widening in Mobile Harbor, Alabama. The model performance wasassessed through comparisons of modeled and observed data of water levels, velocities, and bedlevel changes; the model captured hydrodynamic and sediment transport patterns in the studyarea with skill. The validated model was used
Authors
Davina Passeri, Joseph W. Long, Robert L. Jenkins, David M. Thompson
A Bayesian approach to predict sub-annual beach change and recovery
The upper beach, between the astronomical high tide and the dune-toe, supports habitat and recreation along many beaches, making predictions of upper beach change valuable to coastal managers and the public. We developed and tested a Bayesian network (BN) to predict the cross-shore position of an upper beach elevation contour (ZlD) following 1 month to 1-year intervals at Fire Island, New York. We
Authors
Kathleen Wilson, Erika Lentz, Jennifer L. Miselis, Ilgar Safak, Owen T. Brenner
Spatial and temporal variability of pCO2, carbon fluxes and saturation state on the West Florida Shelf
The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 pCO2 values from over 96 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon with the atmosphere. Overall, the shelf acts as a weak source of CO2 at 0.32 ± 1.5 mol m-2 yr-1. Subregions, however, r
Authors
L. Robbins, K. Daley, L. Barbero, R. Wanninkhof, R.L. Heathcote, H. Zong, John T. Lisle, W.-J. Cai, C. Smith
Comparison of microbiomes of cold-water corals Primnoa pacifica and Primnoa resedaeformis, with possible link between microbiome composition and host genotype
Cold-water corals provide critical habitats for a multitude of marine species, but are understudied relative to tropical corals. Primnoa pacifica is a cold-water coral prevalent throughout Alaskan waters, while another species in the genus, Primnoa resedaeformis, is widely distributed in the Atlantic Ocean. This study examined the V4-V5 region of the 16S rRNA gene after amplifying and pyrosequenci
Authors
Dawn B. Goldsmith, Christina A. Kellogg, Cheryl L. Morrison, Michael A. Gray, Robert P. Stone, Rhian G. Waller, Sandra D. Brooke, Steve W. Ross
Airborne bacteria in Earth’s lower stratosphere resemble taxa detected in the troposphere: results from a new NASA aircraft bioaerosol collector (ABC)
Airborne microorganisms in the upper troposphere and lower stratosphere remain elusive due to a lack of reliable sample collection systems. To address this problem, we designed, installed, and flight-validated a novel Aircraft Bioaerosol Collector (ABC) for NASA's C-20A that can make collections for microbiological research investigations up to altitudes of 13.7 km. Herein we report results from t
Authors
David J. Smith, Jayamary D. Ravichandar, Sunit Jain, Dale W. Griffin, Hongbin Yu, Qian Tan, James Thissen, Terry Lusby, Patrick Nicoll, Sarah Shedler, P. Martinez, Alejandro Osorio, Jason Lechniak, Samuel Choi, Kayleen Sabino, Kathryn Iverson, Luisa Chan, Crystal Jaing, John McGrath
Dynamic modeling of barrier island response to hurricane storm surge under future sea level rise
Sea level rise (SLR) has the potential to exacerbate the impacts of extreme storm events on the coastal landscape. This study examines the coupled interactions of SLR on storm-driven hydrodynamics and barrier island morphology. A numerical model is used to simulate the hydrodynamic and morphodynamic impacts of two Gulf of Mexico hurricanes under present-day and future sea levels. SLR increased sur
Authors
Davina Passeri, Matthew V. Bilskie, Nathaniel G. Plant, Joseph W. Long, Scott C. Hagen
Rapid, remote assessment of Hurricane Matthew impacts using four-dimensional structure-from-motion photogrammetry
Timely assessment of coastal landforms and structures after storms is important for evaluating storm impacts, aiding emergency response and restoration, and initializing and assessing morphological models. Four-dimensional multiview photogrammetry, also known as structure from motion (4D SfM), provides a method for generating three-dimensional reconstructions of landscapes at two times (before and
Authors
Christopher R. Sherwood, Jonathan Warrick, Andrew D. Hill, Andrew C. Ritchie, Brian D. Andrews, Nathaniel G. Plant
The foraminifera of Chincoteague Bay, Assateague Island, and the surrounding areas: A regional distribution study
Foraminiferal census data from Chincoteague Bay, Newport Bay, the salt marshes of Assateague Island, adjacent mainland salt marshes, and the inner-shelf, were assessed to determine the current assemblages in Chincoteague Bay, and how the different environments surrounding the bay, and the gradients within the bay, influence the microfossil distribution. Determining the current background distribut
Authors
Alisha M. Ellis, Jaimie E. Shaw, Lisa E. Osterman, Christopher G. Smith