Modeling the remote and local connectivity of Antarctic krill populations along the western Antarctic Peninsula

Piñones, Andrea; Hofmann, Eileen E.; Daly, Kendra L.; Dinniman, Michael S.; Klinck, John M.

doi:10.3354/meps10256

Cited by 56 publications

(57 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This movement is likely to be driven by the ACC meandering as they are transported further off shelf (Young et al, 2015). Similar particle movements have been observed in Lagrangian tracking models used to estimate krill connectivity (Hofmann and Murphy, 2004;Piñones et al, 2013). Particle dispersal from the Weddell Sea sites is dictated by the cyclonic Weddell Sea gyre.…”

Section: The Use Of Particle Tracking Analysis To Understand Antarctimentioning

confidence: 65%

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

et al. 2017

View full text Add to dashboard Cite

Recent genetic investigations have uncovered a high proportion of cryptic species within Antarctic polychaetes. It is likely that these evolved in isolation during periods of glaciation, and it is possible that cryptic populations would have remained geographically restricted from one another occupying different regions of Antarctica. By analysing the distributions of nine morphospecies, (six of which contained potential cryptic species), we find evidence for widespread distributions within the West Antarctic. Around 60% of the cryptic species exhibited sympatric distributions, and at least one cryptic clade was found to be widespread. Additional DNA barcodes from GenBank and morphological records extended the observed range of three species studied here, and indicate potential circum-Antarctic traits. Particle tracking analyses were used to model theoretical dispersal ranges of pelagic larvae. Data from these models suggest that the observed species distributions inferred from genetic similarity could have been established and maintained through the regional oceanographic currents, including the Antarctic Circumpolar Current (ACC) and its coastal counter current. Improved understanding of the distribution of Antarctic fauna is essential for predicting the impacts of environmental change and determining management strategies for the region.

show abstract

Section: The Use Of Particle Tracking Analysis To Understand Antarctimentioning

confidence: 65%

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

et al. 2017

View full text Add to dashboard Cite

show abstract

“…One current paradigm regarding the origins or 'source' populations of krill in the WAP invokes the transportation of larvae 'upstream' from the Bellingshausen Sea in the southwest to the coastal shelves in the northeast via the Antarctic Circumpolar Current 35,36 . However, the occurrence of very small krill (r16 mm) present in Adélie penguin diets in our study area 12 ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula

Fraser²,

et al. 2014

View full text Add to dashboard Cite

“…These highly productive local ecosystems support nearby colonies of seabirds and pinnipeds. Likewise, submarine canyons are important for steering the advection of krill and other zooplankton onto the shelf (e.g., Dinniman and Klink, 2004;Ward et al, 2007;Piñones et al, 2011Piñones et al, , 2013b, where they become available to predators (Trivelpiece and Fraser, 1995;Schofield et al, 2013). In East Antarctica, odontocete whales take advantage of regions of high productivity associated with physical features (Thiele et al, 2000).…”

Section: Advection and The Location Of Seabird Colonies And Pinniped mentioning

confidence: 99%

“…Investigations of zooplankton transport in the Southern Ocean have focused primarily on Antarctic krill, given their importance as a key link in the Antarctic marine food web and as the focus of a commercial fishery (e.g., Hofmann et al, 1998;Murphy et al, 1998Murphy et al, , 2004aMurphy et al, , 2004bHofmann and Murphy, 2004;Fach and Klinck, 2006;Piñones et al, 2013aPiñones et al, , 2013b. Krill have a heterogeneous circumpolar distribution, with about 70% of the stock occurring between 0 and 90°W, including the open waters of the Antarctic Circumpolar Current in the Atlantic sector (Scotia Sea) and the western side of the Antarctic Peninsula (Atkinson et al, 2008).…”

Section: Impacts Of Advection On Zooplankton In the Antarcticmentioning

confidence: 99%

“…In the Antarctic, substantial spatial and temporal variability in transport occurs in the marginal seas, as well as at much larger, continent-wide spatial scales (Piñones et al, 2013b). An important transport of zooplankton to seabirds and marine mammals occurs in that portion of the Antarctic Circumpolar Current that carries krill from the Antarctic Peninsula and the Weddell Sea to South Georgia (Murphy et al, , 2007aTrathan et al, 2006Trathan et al, , 2007.…”

Section: Effects Of Advective Changes On Seabirds and Marine Mammalsmentioning

confidence: 99%

See 1 more Smart Citation

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

Hunt

Drinkwater

Arrigo

et al. 2016

Progress in Oceanography

View full text Add to dashboard Cite

a b s t r a c tWe compare and contrast the ecological impacts of atmospheric and oceanic circulation patterns on polar and sub-polar marine ecosystems. Circulation patterns differ strikingly between the north and south. Meridional circulation in the north provides connections between the sub-Arctic and Arctic despite the presence of encircling continental landmasses, whereas annular circulation patterns in the south tend to isolate Antarctic surface waters from those in the north. These differences influence fundamental aspects of the polar ecosystems from the amount, thickness and duration of sea ice, to the types of organisms, and the ecology of zooplankton, fish, seabirds and marine mammals. Meridional flows in both the North Pacific and the North Atlantic oceans transport heat, nutrients, and plankton northward into the Chukchi Sea, the Barents Sea, and the seas off the west coast of Greenland. In the North Atlantic, the advected heat warms the waters of the southern Barents Sea and, with advected nutrients and plankton, supports immense biomasses of fish, seabirds and marine mammals. On the Pacific side of the Arctic, cold waters flowing northward across the northern Bering and Chukchi seas during winter and spring limit the ability of boreal fish species to take advantage of high seasonal production there. Southward flow of cold Arctic waters into sub-Arctic regions of the North Atlantic occurs mainly through Fram Strait with less through the Barents Sea and the Canadian Archipelago. In the Pacific, the transport of Arctic waters and plankton southward through Bering Strait is minimal.In the Southern Ocean, the Antarctic Circumpolar Current and its associated fronts are barriers to the southward dispersal of plankton and pelagic fishes from sub-Antarctic waters, with the consequent evolution of Antarctic zooplankton and fish species largely occurring in isolation from those to the north. The Antarctic Circumpolar Current also disperses biota throughout the Southern Ocean, and as a result, the biota tends to be similar within a given broad latitudinal band. South of the Southern Boundary of the ACC, there is a large-scale divergence that brings nutrient-rich water to the surface. This divergence, along with more localized upwelling regions and deep vertical convection in winter, generates elevated nutrient levels throughout the Antarctic at the end of austral winter. However, such elevated nutrient levels do not support elevated phytoplankton productivity through the entire Southern Ocean, as iron concentrations are rapidly removed to limiting levels by spring blooms in deep waters. However, coastal http://dx

show abstract

Modeling the remote and local connectivity of Antarctic krill populations along the western Antarctic Peninsula

Cited by 56 publications

References 80 publications

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

Contact Info

Product

Resources

About