A5031484423- Environmental DNA in Biodiversity Studies
- Identification and Quantification in Food
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Protist diversity and phylogeny
- Fish Ecology and Management Studies
- Marine Invertebrate Physiology and Ecology
- Marine and coastal plant biology
- Marine and coastal ecosystems
- Genetic diversity and population structure
- Aquatic Invertebrate Ecology and Behavior
- Ichthyology and Marine Biology
- Parasite Biology and Host Interactions
- Marine animal studies overview
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Ocean Acidification Effects and Responses
- Methane Hydrates and Related Phenomena
- Water Quality Monitoring Technologies
- Environmental Toxicology and Ecotoxicology
- Ecology and biodiversity studies
University of Alaska Fairbanks
2013-2025
University of Connecticut
2016-2018
State University of New York at Oswego
2010-2011
Cornell University
2010
Abstract Characterization of species diversity zooplankton is key to understanding, assessing, and predicting the function future pelagic ecosystems throughout global ocean. The marine assemblage, including only metazoans, highly diverse taxonomically complex, with an estimated ~28,000 41 major taxonomic groups. This review provides a comprehensive summary DNA sequences for barcode region mitochondrial cytochrome oxidase I (COI) identified specimens. foundation this MetaZooGene Barcode Atlas...
We analyzed the seasonal and interannual variability of planktonic communities in a densely sampled region northeastern Chukchi Sea as part multidisciplinary ecosystem study from 2008 to 2010. Observations chlorophyll-a, inorganic macronutrients, zooplankton (using both 150-μm 505-μm mesh nets) were made within two 900-NM 2 grids (Klondike Burger) at high spatial resolution three times each 2009, with third grid (Statoil) twice Sea-ice conditions prior sampling varied notably during study:...
Abstract Biodiversity of zooplankton is central to the functioning ocean ecosystems, yet morphological taxonomic analysis requires teams experts and detailed examination many samples. Metabarcoding (DNA sequencing short amplified regions one or a few genes from environmental samples) powerful tool for composition diversity natural communities. The 18S rRNA V9 hypervariable region was sequenced 26 samples collected Gulf Maine, Georges Bank, Mid-Atlantic Bight during ecosystem monitoring...
We conducted an interdisciplinary ecological study in and near 3 nearby proposed exploratory oil gas prospects the offshore northeastern Chukchi Sea during open-water seasons of 2008–2010. This region exhibits a classical pelagic–benthic dichotomy food-web structure function. The Klondike area borders eastern edge Central Channel functions as pelagic-dominated ecosystem, whereas Burger lies south Hanna Shoal benthic-dominated ecosystem. Statoil area, which is located north northwest Burger,...
The genus Pseudocalanus (Copepoda, Calanoida) is among the most numerically dominant copepods in eastern North Pacific and Pacific-Arctic waters. We compared population connectivity phylogeography based on DNA sequence variation for a portion of mitochondrial cytochrome oxidase I gene four species with differing biogeographical ranges within these ocean regions. Genetic analyses were linked to characterization biological physical environmental variables each sampled region. Haplotype...
Marine zooplankton are rapid-responders and useful indicators of environmental variability climate change impacts on pelagic ecosystems time scales ranging from seasons to years decades. The systematic complexity taxonomic diversity the assemblage has presented significant challenges for routine morphological (microscopic) identification species in samples collected during ecosystem monitoring fisheries management surveys. Metabarcoding using mitochondrial Cytochrome Oxidase I (COI) gene...
Gelatinous zooplankton ("jellies") have been hypothesized to be the missing link in balancing current carbon budget mismatch "biological pump." During and just after jellyfish bloom events, large amounts of are produced exported from euphotic zone via "jelly falls" dead carcasses excreted mucous. Due patchy nature these processes, addition optical survey tools, a biochemical marker-type approach is needed provide data integrated over time. Environmental DNA has found persist sediments for...
DNA barcoding is a method of identifying individual organisms using short fragments matched to database reference sequences. For metazoan plankton, high proportion species that reside in the deep ocean still lack reliable sequences for genetic markers and systematics. We report on substantial taxonomic efforts across major zooplankton groups collected from surface waters rarely sampled abyssopelagic zone (0 – 4300 m) Gulf Alaska, North Pacific Ocean. Over 1000 specimens were identified,...
Observations of the marine carbonate system were made in 2010 northeastern Chukchi Sea to constrain seasonal progression mineral saturation states (Ω) throughout water column and determine air–sea flux carbon dioxide (CO2). As sea ice retreats from Shelf, primary production consumes dissolved inorganic (DIC) euphotic zone causing pH increase. Throughout summer early autumn months 2010, for calcite aragonite ranged 2.5 4.0 1.5 2.5, respectively, well about horizon 1.0. Much organic matter...
Introduction Botrynema, a genus of medusozoans in the trachyline family Halicreatidae, currently contains two species: B. brucei and ellinorae , distinguished by presence or absence, respectively, an apical knob as diagnostic character. However, no study has corroborated if these taxonomic diagnoses have biological evolutionary basis. Therefore, this we attempted to address question “do nominal species Botrynema represent independent phylogenetic lineages, phenotypic variants single species?...
DNA metabarcoding and morphological taxonomic (microscopic) analysis of the gut contents was used to examine diet diversity seven species fishes collected from mesopelagic depths (200-1000 m) in NW Atlantic Ocean Slope Water during Summer 2018 2019. Metabarcoding two gene regions: V9 hypervariable region nuclear 18S rRNA mitochondrial cytochrome oxidase I (COI). sequences were classified into 14 invertebrate prey groups, excluding fish due predator swamping. Ecological network evaluate...
Copepods of the genus Pseudocalanus are important members zooplankton communities in temperate and polar shelf regions, but few studies have focused on their species-specific biology due to very subtle morphological differences between species. We assess distribution, population structure production four co-occurring species across Chukchi Sea during 2004, 2009 2012. Our approach used a combination microscopic identification polymerase chain reaction discriminate Currently, arctic P. acuspes...
We performed a molecular microbial ecological analysis in the northeastern Chukchi Sea order to characterize bacterial community structure and genetic potential for biogeochemical cycling oil biodegradation region targeted gas exploration (Burger lease area). Samples were collected from surface, middle (20 m), bottom (2–3 m above seafloor) of water column during open-water season August September 2012 at 17 different locations. determined with 16S rRNA genes sequencing detected functional...
The dramatic warming of the Arctic Ocean will impact pelagic ecosystems in complex ways, including shifting patterns species distribution and abundance, altering migration pathways population connectivity. Phylum Chaetognatha (arrow worms) are abundant zooplankton assemblage highly effective predators, with key roles food webs. They useful indicator for impacts climate change on marine ecosystems. This study examined genetic diversity, structure connectivity chaetognath, Eukrohnia hamata,...
Abstract The euphausiid genus Stylocheiron includes species with biogeographical distributions spanning multiple ocean basins. Despite their circumglobal distributions, the show low levels of genetic diversity and little or no evidence population structure based on mitochondrial cytochrome oxidase I (COI) barcode region, exception a possible cryptic within affine. elongatum showed < 1% variation COI region among populations in different basins, but analysis samples collected from...
Abstract The first record of the parasite Alebion carchariae in waters Ascension Island collected from Galapagos sharks, Carcharhinus galapagensis (Carcharhinidae), is described. No previous this exists for Island, nor have sharks previously been listed as a host. Specimens A. were identified using morphological techniques and DNA barcoding cytochrome c oxidase I subunit (COI) gene. This study provides COI barcodes species brief review known hosts. We recommend further research to understand...