A5051058570- Marine and coastal ecosystems
- Aquatic Ecosystems and Phytoplankton Dynamics
- Microbial Community Ecology and Physiology
- Marine Toxins and Detection Methods
- Underwater Acoustics Research
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Digital Holography and Microscopy
- Marine and coastal plant biology
- Coastal wetland ecosystem dynamics
- Diatoms and Algae Research
- Marine and environmental studies
- Freshwater macroinvertebrate diversity and ecology
- Microfluidic and Bio-sensing Technologies
- Fluid Dynamics Simulations and Interactions
- Marine Invertebrate Physiology and Ecology
- Aquatic Invertebrate Ecology and Behavior
- Protist diversity and phylogeny
- Biocrusts and Microbial Ecology
- Underwater Vehicles and Communication Systems
- Nicotinic Acetylcholine Receptors Study
- Oil Spill Detection and Mitigation
- Coastal and Marine Management
- Fisheries and Aquaculture Studies
- Aquatic Ecosystems and Biodiversity
Harbor Branch Oceanographic Institute
2016-2024
Florida Atlantic University
2016-2024
University of Rhode Island
2009-2016
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 473:29-51 (2013) - DOI: https://doi.org/10.3354/meps10049 Characterization of biophysical interactions in water column using situ digital holography Siddharth Talapatra1, Jiarong Hong1, Malcolm McFarland3, Aditya R. Nayak1, Cao Zhang1, Joseph Katz1,*, James Sullivan2, Michael Twardowski2, Jan Rines3, Percy...
There is a growing use of remote sensing observations for detecting and quantifying freshwater cyanobacteria populations, yet the inherent optical properties these communities in natural settings, fundamental to bio-optical algorithms, are not well known. Towards bridging this knowledge gap, we measured full complement western Lake Erie during blooms summers 2013 2014. Our measurements focus attention on uniqueness blooms, which have consequences modeling. We found basin our field work were...
Abstract In situ measurements were undertaken to characterize particle fields in undisturbed oceanic environments. Simultaneous, co‐located depth profiles of and flow characteristics recorded using a submersible holographic imaging system an acoustic Doppler velocimeter, under different conditions varying concentration loads, typical those found coastal oceans lakes. Nearly one million particles with major axis lengths ranging from ∼14 μm 11.6 mm, representing diverse shapes, sizes, aspect...
Abstract In situ digital inline holography is a technique which can be used to acquire high‐resolution imagery of plankton and examine their spatial temporal distributions within the water column in nonintrusive manner. However, for effective expert identification an organism from holographic imagery, it necessary apply computationally expensive numerical reconstruction algorithm. This lengthy process inhibits real‐time monitoring distributions. Deep learning methods, such as convolutional...
The link between suspended particle fields, dynamics and bulk optical properties in natural waters is poorly known because adequate technology lacking to fully characterize critical parameters interactions, especially for ephemeral bubbles aggregates. This paper highlights the capabilities of digital holography provide non-intrusive, high-resolution 3-D imaging particles their environment. As part a NOPP project (HOLOCAM) commercialize an in-situ holographic microscope (DHM), field data with...
Macroalgal blooms occur worldwide and have the potential to cause severe ecological economic damage. Narragansett Bay, RI is a eutrophic system that experiences summer macroalgal composed mostly of Ulva compressa rigida, which biphasic life cycles with separate haploid diploid phases. In this study, we used flow cytometry assess ploidy levels U. rigida populations from five sites in RI, USA, relative contribution both phases bloom formation. Both gametophytes sporophytes were present for...
Observing multiple size classes of organisms, along with oceanographic properties and water mass origins, can improve our understanding the drivers aggregations, yet acquiring these measurements remains a fundamental challenge in biological oceanography. By deploying sampling systems, from conventional bottle net to situ imaging acoustics, we describe spatial patterns different marine organisms (several microns ∼10 cm) relation local regional (m km) physical conditions on Delaware...
The Indian River Lagoon (IRL) is a large and complex barrier island estuary on Florida's East coast. system also one of the nation's most biologically diverse, major spawning nursery ground for numerous species fish shellfish, home to significant populations dolphins manatees. Ocean observing systems can play an integral role in evaluating effects both natural (e.g. climate change) anthropogenic impacts nutrient pollution) such system. In this paper we present integrated multidisciplinary...
Through \textit{in situ} holographic imaging of undisturbed water, diatom colonies with high aspect ratios have been found to exhibit preferential horizontal orientation within biomass subsurface layers. We analyzed video determine the abundance, size, and over several vertical profiles from surface $\sim$25 m depth. A geometric optics model based on these measurements was then used estimate light absorption by phytoplankton throughout water column. Results show a substantial increase in...
The Indian River Lagoon (IRL) spans approximately one-third of the east coast Florida and, in recent years, has faced frequent harmful algal blooms (HABs). Blooms potentially toxic diatom, Pseudo-nitzschia, occur throughout lagoon and were reported primarily from northern IRL. goal this study was to identify species Pseudo-nitzschia characterize their bloom dynamics southern IRL system where monitoring been less frequent. Surface water samples collected five locations between October 2018...
Digital holography provides a unique perspective towards studying aquatic particles/organisms. The ability to sample particles in undisturbed conditions, coupled with the generate 3-D spatial distributions is currently unmatched by any other technique. To leverage these advantages, field experiments goal of characterizing particle properties situ, were conducted using submersible holographic imaging system. Diverse environments sampled over 3 separate deployments between 2014 and 2017. areas...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 531:43-61 (2015) - DOI: https://doi.org/10.3354/meps11325 Impact of phytoplankton size and physiology on particulate optical properties determined with scanning flow cytometry Malcolm N. McFarland*, Jan Rines, James Sullivan, Percy Donaghay University Rhode Island, Graduate School Oceanography, 215 South...
The St. Lucie River Estuary (SLE) in southeast Florida has a very large watershed comprised of several natural rivers and network artificial canals used for water supply flood control. One the largest most critical these is C-44, which connects Lake Okeechobee to South Fork SLE one primary means by excess drained from lake. Major discharges lake at start 2016 summer wet season resulted severe harmful algal blooms recent history, causing millions dollars economic losses area. Despite similar...