A5031388639- Marine and coastal ecosystems
- Marine and fisheries research
- Marine animal studies overview
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Fish Ecology and Management Studies
- Arctic and Antarctic ice dynamics
- Species Distribution and Climate Change
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Avian ecology and behavior
- Coastal and Marine Management
- bioluminescence and chemiluminescence research
- Genomics and Phylogenetic Studies
- Polar Research and Ecology
- Ichthyology and Marine Biology
- Advanced Chemical Sensor Technologies
- Environmental Monitoring and Data Management
- Underwater Acoustics Research
- Water Quality Monitoring and Analysis
- Protist diversity and phylogeny
- Underwater Vehicles and Communication Systems
- Marine and coastal plant biology
- Marine Toxins and Detection Methods
University of Delaware
2016-2025
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2024
Balfour Beatty (United Kingdom)
2009-2011
College of Marin
2008-2011
Rutgers, The State University of New Jersey
2004-2008
California Polytechnic State University
2004
Eukaryotic genome size varies over five orders of magnitude; however, the distribution is strongly skewed toward small values. Genome highly correlated to a number phenotypic traits, suggesting that relative lack large genomes in eukaryotes due selective removal. Using phylogenetic contrasts, we show rate evolution proportional size, with fastest rates occurring largest genomes. This trend evident across 20 major eukaryotic clades analyzed, indicating long time scales, change dominant and...
The spatial and temporal dynamics of ocean biomes their provincial subdivisions are affected by the Earth's climate system, but effect change on distribution variability provinces is largely unknown. A time‐series analysis from multiple satellite platforms shows that lowest productivity have been growing over last decade growth rates these increase as they get larger, decrease smaller. most oligotrophic grow reducing size slightly less provinces. As a consequence, while ocean's extreme...
Biogeographic provinces are categories used for comparing and contrasting biogeochemical processes biodiversity between ocean regions. Provinces provide a framework reasonable extrapolation of point or transect data to broader areas. However, their use is limited due the non‐automatic, subjective nature province classification. Furthermore, it unknown how boundaries respond seasonal climate forcing. These issues make related hypotheses difficult test with static provinces. To solve this...
Abstract For terrestrial and marine benthic ecologists, landscape ecology provides a framework to address issues of complexity, patchiness, scale—providing theory context for ecosystem based management in changing climate. Marine pelagic ecosystems are likewise response warming, chemistry, resource exploitation. However, unlike spatial landscapes that migrate slowly with time, seascapes embedded turbulent, advective ocean. Adaptations from must consider the nature scale biophysical...
Abstract While ecologists have long recognized the influence of spatial resolution on species distribution models (SDMs), they given relatively little attention to temporal resolution. Considering resolutions is critical in modelling highly mobile marine animals, as interact with dynamic oceanographic processes that vary at time‐scales from seconds decades. We guide selecting best match ecological questions and ecosystems, managers applying these models. group environmental variables used...
Understanding and predicting the responses of wide‐ranging marine predators such as cetaceans, seabirds, sharks, turtles, pinnipeds large migratory fish to dynamic oceanographic conditions requires habitat‐based models that can sufficiently capture their environmental preferences. Marine ecosystems are inherently dynamic, animal–environment interactions known occur over multiple, nested spatial temporal scales. The resolution averaging data layers therefore key considerations in modelling...
Abstract Mixed‐layer depth (MLD) has been widely linked to phytoplankton dynamics in Antarctica's coastal regions; however, inconsistent definitions have made intercomparisons among region‐specific studies difficult. Using a data set with over 20,000 water column profiles corresponding 32 Slocum glider deployments three Antarctic regions (Ross Sea, Amundsen and West Peninsula), we evaluated the relationship between MLD vertical distribution. Comparisons of these estimates an applied...
Abstract A seven-year oceanographic time series in NW Mediterranean surface waters was combined with pyrosequencing of ribosomal RNA (16S rRNA) and gene copies rDNA) to examine the environmental controls on SAR11 ecotype dynamics potential activity. diversity exhibited pronounced seasonal cycles remarkably similar total bacterial diversity. The timing maxima across narrow broad phylogenetic clades strongly associated deep winter mixing. Diversity minima were periods stratification that low...
Abstract Bathymetric depressions (canyons) exist along the West Antarctic Peninsula shelf and have been linked with increased phytoplankton biomass sustained penguin colonies. However, physical mechanisms driving this enhanced are not well understood. Using a Slocum glider data set over 25,000 water column profiles, we evaluate relationship between mixed layer depth (MLD, estimated using of maximum buoyancy frequency) vertical distribution. We use deployments in Palmer Deep region to examine...
Abstract The contribution of climate change to shifts in a species’ geographic distribution is critical and often unresolved ecological question. Climate Antarctica asymmetric, with cooling parts the continent warming along West Antarctic Peninsula (WAP). Adélie penguin ( Pygoscelis adeliae ) circumpolar meso-predator exposed full range undergoing dramatic population coincident change. We used true presence-absence data on breeding colonies estimate past future changes habitat suitability...
Abstract Climate-driven sympatry may lead to competition for food resources between species. Rapid warming in the West Antarctic Peninsula (WAP) is coincident with increasing gentoo penguin and decreasing Adélie populations, suggesting that exacerbate decline. On fine scales, we tested foraging these species during chick-rearing period by comparing their behaviors distribution of prey, krill. We detected krill aggregations within horizontal vertical ranges penguins found selected habitats...
Forecasts of marine environmental and ecosystem conditions are now possible at a range time scales, from nowcasts to forecasts over seasonal longer frames. Delivery these products offers resource managers users relevant insight into patterns future support decisions stakeholders face associated with objectives. The pace progress in forecast development is so rapid that the scientific community may not be considering fully impacts on their incentives. information, particularly about...
Abstract The combination of animal-borne telemetry and oceanographic sensor technologies creates an opportunity for marine animals to serve as ocean observing platforms (OOPs), carrying tags that record in situ data they naturally move. In this study, we create a blueprint shark OOP species selection, quantifying comparing the potential transmit collected data, environmental ranges various candidates are expected encounter, features may be resolve. Metrics satellite transmission probability,...
Abstract The coastal region of the Western Antarctic Peninsula is considered a biological hotspot with high levels phytoplankton productivity and krill biomass. Recent in situ observations particle modeling studies Palmer Canyon, deep bathymetric feature region, demonstrated presence recirculating eddy that traps particles, retaining distinct layer over summer season. We applied metagenomic sequencing Imaging Flow Cytobot (IFCB) analysis to characterize microbial community layer. sampled...
As part of the 2001 Hyper Spectral Coupled Ocean Dynamics Experiment, sea surface temperature and ocean color satellite imagery were collected for continental shelf Mid‐Atlantic Bight. These images used to develop a water mass analysis classification scheme that objectively describes locations masses their boundary locations. This technique combines multivariate cluster with newly developed genetic expression algorithm determine number types in region on basis measurements. Then, through...
A correlation between genome size and cell volume has been observed across diverse assemblages of eukaryotes. We examined this relationship in diatoms (Bacillariophyceae), a phylum which is critical ecological biogeochemical importance. In addition to testing whether there predictive extant species, we tested evolutionary divergences were correlated with (using independent contrasts). estimated total DNA content for 16 diatom species using flow cytometer volumes dimensions scaling equations....
[1] During spring and summer time, coastal upwelling influences circulation ecosystem dynamics of the Monterey Bay, California, which is recognized as a National Marine Sanctuary. Observations physical, bio-optical properties (including bioluminescence) together with results from dynamical biochemical bioluminescence models are used to interpret development event during August 2003 in California. model show phytoplankton bloom southern portion Bay. Model an increase nutrients bay, where...
Extensive AUVs surveys showed that during the development of upwelling, bioluminescent dinoflagellates from northern part Monterey Bay, California (called upwelling shadow area), were able to avoid advection by southward flowing currents along entrance while non‐bioluminescent phytoplankton advected currents. It is known vertical swimming deeper layers helps them losses due advection. In present paper, we investigate if modeling dinoflagellates' can explain observed ability development. The...
ABSTRACT Physical processes in the coastal Mid‐Atlantic create a complex and dynamic seascape. Understanding how fishes respond to this complexity has been major motivation establishing biotelemetry arrays. Most arrays maximize probability offish detection by positioning hydrophones near geophysical bottlenecks. The development of real‐time ocean observatory allows for synchronous mapping hydrographic structures important fishes. These observations provide context interpreting impact...
Complex social networks and behaviors are difficult to observe for free-living marine species, especially those that move great distances. Using implanted acoustic transceivers study the inter- intraspecific interactions of sand tiger sharks Carcharias taurus, we observed group behavior has historically been associated with higher order mammals. We found evidence strongly suggestive fission-fusion behavior, or changes in size composition tigers, related five behavioral modes (summering,...