Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Regional Differences In Quality Of Krill And Fish As Prey Along The Western Antarctic Peninsula, Kate E. Ruck, Deborah K. Steinberg, Elizabeth A. Canuel
Regional Differences In Quality Of Krill And Fish As Prey Along The Western Antarctic Peninsula, Kate E. Ruck, Deborah K. Steinberg, Elizabeth A. Canuel
VIMS Articles
The warming trend in the northern part of the Western Antarctic Peninsula (WAP) has led to a decrease in perennial and summer sea ice, an increase in heat content over the shelf, and lower phytoplankton biomass, which could affect the prey quality of krill and fish that are utilized by apex predators. We compared prey quality metrics, including elemental (C, N) content; total, neutral, and polar lipid content; and energy densities of known penguin prey items including krill (Euphausia superba, Thysanoessa macrura, and E. crystallorophias) and fish (silverfish Pleuragramma antarcticum and the myctophid Electrona antarctica) …
Multiplatform, Multidisciplinary Investigations Of The Impacts Of Modified Circumpolar Deep Water In The Ross Sea, Antarctica, Walker O. Smith Jr., Kt Goetz, De Kaufman, By Queste, V Asper, Dp Costa, Ms Dinniman, Mam Friedrichs, Et Al
Multiplatform, Multidisciplinary Investigations Of The Impacts Of Modified Circumpolar Deep Water In The Ross Sea, Antarctica, Walker O. Smith Jr., Kt Goetz, De Kaufman, By Queste, V Asper, Dp Costa, Ms Dinniman, Mam Friedrichs, Et Al
VIMS Articles
In 2010-2011, three projects combined to characterize the temporal and spatial distributions of Modified circumpolar Deep Water (MCDW) in the Ross Sea using icebreaker-based sampling, gliders, instrumented seals, and hindcasts from a numerical circulation model. The fieldwork cearly identified MCDW throughout the Ross Sea, and the lata were used to determine its influence on potential heat.md nutrient inputs and biotic distributions. Furthermore, the numerical simulations confirm its apparent trajectory and location. Substantial small-scale variability in oceanographic and biological distributions suggests that such variability may play an important role in biogeochemical cycles. Data from the three projects provide a view of …
Phytoplankton Growth Rates In The Ross Sea, Antarctica, Anna F. Mosby, Walker O. Smith Jr.
Phytoplankton Growth Rates In The Ross Sea, Antarctica, Anna F. Mosby, Walker O. Smith Jr.
VIMS Articles
The Ross Sea is a highly productive region of the Southern Ocean, but phytoplankton growth rates there are poorly constrained. Variability in growth rates was investigated on a January−February 2012 cruise to the Ross Sea using 37 14C isotopic tracer incubations and 11 dilution experiments. We examined the effects of extended incubations on measured growth rates in 14C incubations, quantified phytoplankton growth and grazing mortality rates through dilution experiments, and analyzed the effects of irradiance on carbon:chlorophyll ratios in dilution experiments. Growth rates in 14C incubations ranged from 0.03 to 0.85 d−1. We found that chlorophyllbased phytoplankton growth rates in …
Long-Term Time-Series Study Of Salp Population Dynamics In The Sargasso Sea, Joshua P. Stone, Deborah K. Steinberg
Long-Term Time-Series Study Of Salp Population Dynamics In The Sargasso Sea, Joshua P. Stone, Deborah K. Steinberg
VIMS Articles
Salps are bloom-forming, pelagic tunicates with high grazing rates on phytoplankton, with the potential to greatly increase vertical particle flux through rapidly sinking fecal pellets. However, the frequency and causes of salp blooms are not well known. We quantified salps from day and night zooplankton net tows in the epipelagic zone of the North Atlantic subtropical gyre as part of the Bermuda Atlantic Time-series Study (BATS). Salp species and size were quantified in biweekly to monthly tows from April 1994 to November 2011. Twenty-one species of salps occurred at the BATS site over this time period, and the most common …