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Filter Total Items: 912
Imprint of regional oceanography on foraminifera of eastern Pacific Coral Reefs
The marginal marine environments of the eastern tropical Pacific (ETP) serve as an ideal natural laboratory to study how oceanographic and climatic variability influence coral-reef ecosystems. Reefs along the Pacific coast of Panamá span a natural gradient of nutrients, pH, and temperature as a result of stronger seasonal upwelling in the Gulf of Panamá relative to the Gulf of Chiriquí. The ecosys
Authors
Angelica Maria Zamora-Duran, Richard B. Aronson, James J. Leichter, Jennifer A. Flannery, Julie N. Richey, Lauren Toth
Accurate bathymetric maps from underwater digital imagery without ground control
Structure-from-Motion (SfM) photogrammetry can be used with digital underwater photographs to generate high-resolution bathymetry and orthomosaics with millimeter-to-centimeter scale resolution at relatively low cost. Although these products are useful for assessing species diversity and health, they have additional utility for quantifying benthic community structure, such as coral growth and fine
Authors
Gerry Hatcher, Jonathan Warrick, Andrew C. Ritchie, Evan T. Dailey, David G. Zawada, Christine J. Kranenburg, Kimberly K. Yates
Sediments and the sea floor of the continental shelves and coastal waters of the United States—About the usSEABED integrated sea-floor-characterization database, built with the dbSEABED processing system
Since the second half of the 20th century, there has been an increase in scientific interest, research effort, and information gathered on the geologic sedimentary character of the continental margins of the United States. Data and information from thousands of sources have increased our scientific understanding of the character of the margin surface, but rarely have those data been combined and i
Authors
Brian J. Buczkowski, Jane A. Reid, Chris J. Jenkins
Using multiple environmental proxies and hydrodynamic modeling to investigate Late Holocene climate and coastal change within a large Gulf of Mexico estuarine system (Mobile Bay, Alabama, USA)
A high degree of uncertainty exists for understanding and predicting coastal estuarine response to changing climate, land-use, and sea-level conditions, leaving geologic records as a best-proxy for constraining potential outcomes. With the majority of the world's population focused in coastal regions, understanding how local systems respond to global, regional, and even local pressures is key in d
Authors
Christopher G. Smith, Miriam C. Jones, Lisa Osterman, Davina Passeri
7700-year persistence of an isolated, free-living coral assemblage in the Galápagos Islands: A model for coral refugia?
In an eastern-Pacific coral assemblage at Devil’s Crown, Galápagos Islands, Ecuador, two coral species, Psammocora stellata and Cycloseris (Diaseris) distorta, form dense populations of unattached colonies on sand and rubble substrata. In the Galápagos, living C. (D.) distorta is found only at this single site, whereas populations of P. stellata are found throughout the archipelago. Six cores dati
Authors
Joshua Feingold, Bernhard Reigl, Katie Hendrickson, Lauren Toth, Hai Cheng, R. Lawrence Edwards, Richard B. Aronson
Disturbances drive changes in coral community assemblages and coral calcification capacity
Anthropogenic environmental change has increased coral reef disturbance regimes in recent decades, altering the structure and function of many coral reefs globally. In this study, we used coral community survey data collected from 1996 to 2015 to evaluate coral calcification capacity (CCC) dynamics with respect to recorded pulse disturbances for 121 reef sites in the Main Hawaiian Islands and Mo'o
Authors
Travis A. Courtney, Brian B. Barnes, Iliana Chollett, Robin Elahi, Kevin Gross, James R. Guest, Ilsa B. Kuffner, Elizabeth A. Lenz, Hanna R Nelson, Caroline Rogers, Lauren Toth, Andreas J Andersson
Antibiotic resistance in marine microbial communities proximal to a Florida sewage outfall system
Water samples were collected at several wastewater treatment plants in southeast Florida, and water and sediment samples were collected along and around one outfall pipe, as well as along several transects extending both north and south of the respective outfall outlet. Two sets of samples were collected to address potential seasonal differences, including 38 in the wet season (June 2018) and 42 i
Authors
Dale W. Griffin, Kenneth Banks, Kurtis Gregg, Sarah Shedler, Brian Walker
Digging into the geologic record of environmentally driven changes in coral-reef development
This lesson uses data based on real-world geological archives to guide students toward understanding how climate and oceanography have impacted coral-reef growth over the last 5000 years. The objective of the lesson is for students to determine the relationship between environmental variability and coral-reef development over millennial timescales. In this activity, students will:
1. Characterize
Authors
Philip M. Gravinese, Richard B. Aronson, Lauren Toth
Development of a modeling framework for predicting decadal barrier island evolution
Predicting the decadal evolution of barrier island systems is important for coastal managers who propose restoration or preservation alternatives aimed at increasing the resiliency of the island and its associated habitats or communities. Existing numerical models for simulating morphologic changes typically include either long-term (for example, longshore transport under quiescent conditions) or
Authors
Rangley C. Mickey, Joseph W. Long, P. Soupy Dalyander, Robert L. Jenkins, David M. Thompson, Davina Passeri, Nathaniel G. Plant
Application of decadal modeling approach to forecast barrier island evolution, Dauphin Island, Alabama
Forecasting barrier island evolution provides coastal managers and stakeholders the ability to assess the resiliency of these important coastal environments that are home to both established communities and existing natural habitats. This study uses an established coupled model framework to assess how Dauphin Island, Alabama, responds to various storm and sea-level change scenarios, along with a s
Authors
Rangley C. Mickey, Elizabeth Godsey, P. Soupy Dalyander, Victor Gonzalez, Robert L. Jenkins, Joseph W. Long, David M. Thompson, Nathaniel G. Plant
Development of a process-based littoral sediment transport model for Dauphin Island, Alabama
Dauphin Island, Alabama, located in the Northern Gulf of Mexico just outside of Mobile Bay, is Alabama’s only barrier island and provides an array of historical, natural, and economic resources. The dynamic island shoreline of Dauphin Island evolved across time scales while constantly acted upon by waves and currents during both storms and calm periods. Reductions in the vulnerability and enhancem
Authors
Robert L. Jenkins, Joseph W. Long, P. Soupy Dalyander, David M. Thompson, Rangley C. Mickey
Blind testing of shoreline evolution models
Beaches around the world continuously adjust to daily and seasonal changes in wave and tide conditions, which are themselves changing over longer time-scales. Different approaches to predict multi-year shoreline evolution have been implemented; however, robust and reliable predictions of shoreline evolution are still problematic even in short-term scenarios (shorter than decadal). Here we show res
Authors
Jennifer Montaño, Giovanni Coco, Jose Antolinez, Tomas Beuzen, Karin Bryan, Laura Cagigal, Bruno Castelle, Mark Davidson, Evan B. Goldstein, Raimundo Ibaceta, Déborah Idier, Bonnie C. Ludka, Sina Masoud-Ansari, Fernando Mendez, A. Brad Murray, Nathaniel G. Plant, Katherine Ratlif, Arthur Robinet, Ana Rueda, Nadia Sénéchal, Joshua Simmons, Kristen Splinter, Scott Stephens, Ian Townend, Sean Vitousek, Kilian Vos