Marine Biology Commons^™

Long-Term Observations Of Pteropod Phenology Along The Western Antarctic Peninsula, Patrica S. Thibodeau, Deborah K. Steinberg, Colleen E. Mcbride, John A. Conroy, Hugh W. Ducklow

VIMS Articles

Shifts in phenology – annually occurring life history events – have been observed among many marine organisms due to global warming. We examined if phenological changes in the pteropod (pelagic snail) Limacina helicina antarctica have occurred along the Western Antarctic Peninsula, one of the most intensely warming regions on Earth, which would have important implications for regional food web dynamics. Pteropod shell diameters were analyzed from samples collected in the Palmer Antarctica Long-Term Ecological Research (PAL LTER) program year-round sediment trap from 2004 to 2018. There was considerable interannual variability in the time of appearance of a new pteropod cohort, …

Characterizing The Diversity Of The Eukaryotic Microbiome In Marine Crustacean Zooplankton., Rose-Lynne Savage

Electronic Thesis and Dissertation Repository

Understanding zooplankton productivity is critical for modeling marine food web function, of which one poorly known factor is the influence of zooplankton symbionts. Zooplankton protist symbiont diversity is underestimated due to the limited surveys and techniques previously used. Using 18S V4 metabarcoding, I characterized the eukaryotic microbiomes associated with crustacean zooplankton from the northern Strait of Georgia, BC. Apostome ciliates were most abundant in all hosts except for cyclopoid copepods, which were dominated by Syndiniales. Most symbiont lineages were more abundant in one or two hosts, suggesting some degree of host preference. Microbiome data also provided information on diet, confirming …

Shadowed Image Particle Profiling Evaluation Recorder (Sipper) Plankton And Marine Snow Abundance And Distribution Data Collected Aboard Multiple Research Cruises In The Northeastern Gulf Of Mexico From 2010-05-12 To 2010-09-16, Kendra L. Daly, Andrew W. Remsen, Kurt Kramer

C-IMAGE data

This dataset contains the abundance and distribution of marine snow, phytoplankton, zooplankton, and larval fish, along with environmental parameters, collected aboard several research vessels (RV Weatherbird II, MV Specialty Diver, RV Gordon Gunter) in the northeastern Gulf of Mexico from 2010-05-12 to 2010-09-16. A high speed Dalsa Piranha-2 line-scan camera and a pseudo-collimated LED generated light sheet was used to image the shadows and outlines of resolvable particles that passed through a 100 cm2 field of view. The operational optical resolution of the system was ~65 um. The camera was towed at speeds between 2-3 knots in an oblique profile …

Correlation Between Ocean Acidification And Zooplankton In The South Pacific Gyre, Samuel Noonan, Rachel Scudder

DU Undergraduate Research Journal Archive

The South Pacific Gyre is a naturally occurring carbon sink, meaning that it absorbs atmospheric carbon dioxide by dissolving it into the moving surface water.The dissolution of CO2 level will dictate the water’s acidic levels a larger the concentration of dissolved CO2 is known to increase the salt water’s acidity. A great amount of the ocean’s biomass is composed of calcifying organisms,which produce tests or shells made from calcium carbonate CaCO3.The goal of our project is to determine if there is a correlation between the water acidity across various locations, as we sailed through the South Pacific gyre and the …

Cloud Shadows Drive Vertical Migrations Of Deep-Dwelling Marine Life, Melissa M. Omand, Deborah K. Steinberg, Karen Stamieszkin

VIMS Articles

Many zooplankton and fishes vertically migrate on a diel cycle to avoid predation, moving from their daytime residence in darker, deep waters to prey-rich surface waters to feed at dusk and returning to depth before dawn. Vertical migrations also occur in response to other processes that modify local light intensity, such as storms, eclipses, and full moons. We observed rapid, high-frequency migrations, spanning up to 60 m, of a diel vertically migrating acoustic
scattering layer with a daytime depth of 300 m in the subpolar Northeastern Pacific Ocean. The depth of the layer was significantly correlated, with an ∼5-min lag, …

Zoop Soup (And Poop!), Kristen Sharpe

Reports

Grades: 6-12 Subjects: Biology | Life Science | Environmental Science | Oceanography

Microscopic poops with a global impact!

Students learn about the ecological and global importance of zooplankton and their fecal pellets in the ocean carbon cycle. Students are guided through the scientific method while participating in an activity that simulates real sediment trap fecal pellet research. Students hypothesize where a sediment trap was set based on the "fecal pellets" contained in their sample, identify source species using a dichotomous key, count and weigh biomass of pellets, and graph and share results with classmates.