Sponsored Research Archives - Page 35 of 37 - NCCOS - National Centers for Coastal Ocean Science

Estimates of the Direct Effect of Seawater pH on the Survival Rate of Species Groups in the California Current Ecosystem

Ocean acidification (OA) has the potential to restructure ecosystems due to variation in species sensitivity to the projected changes in ocean carbon chemistry. Ecological models can be forced with scenarios of OA to help scientists, managers, and other stakeholders understand how ecosystems might change. We present a novel methodology for developing estimates of species sensitivity … Read more

Two new karlotoxins found in Karlodinium veneficum (strain GM2) from the East China Sea

The dinoflagellate Karlodinium veneficum is a harmful algal bloom species with a worldwide distribution. This small athecate dinoflagellate makes a family of polyketide toxins that are hemolytic, cytotoxic and ichthyotoxic. The first chemical structure for karlotoxins from East China Sea (ECS) is reported here. The two new karlotoxins, namely 4,5-dihydro-KmTx 2 (compound 1) and 4,5-dihydro-dechloro-KmTx … Read more

Diurnal fluctuations in CO2 and dissolved oxygen concentrations do not provide a refuge from hypoxia and acidification for early-life-stage bivalves

This study assessed the effects of constant and diurnally fluctuating acidification and hypoxia on the survival, growth, and development of larval stages of 3 bivalves indigenous to the east coast of North America: bay scallops Argopecten irradians, hard clams Mercenaria mercenaria, and eastern oysters Crassostrea virginica. Bivalves were exposed to ideal (pH = ~7.9, dissolved … Read more

Initial skill assessment of the California Harmful Algae Risk Mapping (C-HARM) system

Toxic algal events are an annual burden on aquaculture and coastal ecosystems of California. The threat of domoic acid (DA) toxicity to human and wildlife health is the dominant harmful algal bloom (HAB) concern for the region, leading to a strong focus on prediction and mitigation of these blooms and their toxic effects. This paper … Read more

Coastal wetland response to sea-level rise in a fluvial estuarine system

Coastal wetlands are likely to lose productivity under increasing rates of sea-level rise (SLR). This study assessed a fluvial estuarine salt marsh system using the Hydro-MEM model under four SLR scenarios. The Hydro-MEM model was developed to apply the dynamics of SLR as well as capture the effects associated with the rate of SLR in … Read more

The coral core microbiome identifies rare bacterial taxa as ubiquitous endosymbionts

Despite being one of the simplest metazoans, corals harbor some of the most highly diverse and abundant microbial communities. Differentiating core, symbiotic bacteria from this diverse host-associated consortium is essential for characterizing the functional contributions of bacteria but has not been possible yet. Here we characterize the coral core microbiome and demonstrate clear phylogenetic and … Read more

A Reduced Complexity, Hybrid Empirical-Mechanistic Model of Eutrophication and Hypoxia in Shallow Marine Ecosystems

Numerical simulation models have a long history as research tools for the study of coastal marine ecosystems, and are increasingly being used to inform management, particularly related to nutrient-fueled eutrophication. Demand for modeling assessments is rapidly increasing, and managers need generally applicable tools that can be rapidly applied with limited resources. Additionally, a variety of … Read more

Characterization of mesophotic coral/sponge habitats and fish assemblages in the regions of Pulley Ridge and Tortugas from ROV Dives during R/V Walton Smith Cruises of 2012 to 2015

This report summarizes the remotely operated vehicle (ROV) surveys during four cruises from 2012 to 2015 which characterizes the mesophotic coral reef ecosystems at Pulley Ridge and Tortugas. This research is part of a grant funded by the NOAA National Centers for Coastal Ocean Science award NA11NOS4780045: “Connectivity of the Pulley Ridge – South Florida … Read more

Characterization of the mesophotic benthic habitat and fish assemblages from ROV dives on Pulley Ridge during 2015 R/V Walton Smith cruise

This cruise was conducted at Pulley Ridge mesophotic reef in the Gulf of Mexico, from August 22 to September 4, 2015, in collaboration with the University of Miami, HBOI-CIOERT, NOAA Fisheries, and the University of North Carolina at Wilmington (UNCW) Undersea Vehicles Program. This is the fourth and final cruise of this grant. The University … Read more

Characterization of mesophotic coral/sponge ecosystem habitats in the region of the Tortugas Ecological Reserves from ROV Dives during 2013 and 2014 R/V Walton Smith cruises

This report resulted from our ROV surveys to characterize the mesophotic coral reef ecosystems at Pulley Ridge and Tortugas as part of a research grant funded by the National Oceanic and Atmospheric Administration (NOAA) Center for Sponsored Coastal Ocean Research under an award NA11NOS4780045 to the University of Miami (Project Title: “Connectivity of the Pulley … Read more