Life Hung by a Thread: Endurance of Antarctic Fauna in Glacial Periods

Thatje, Sven; Hillenbrand, Claus‐Dieter; Mackensen, Andreas; Larter, Robert D

doi:10.1890/07-0498.1

Cited by 143 publications

(182 citation statements)

References 79 publications

Supporting

Mentioning

170

Contrasting

Unclassified

Order By: Relevance

“…Open water polynyas are possible sources of local deep-water food supply for deposit feeding organisms, especially from the Maudheim polynya (71°01'S, 10° 88°W) in the east Weddell Sea and the Pine Island Bay polynya (73° 16'S, 104° 25'W) in the Amundsen Sea (Arrigo and Dijken, 2003;Yager et al, 2012). Availability of such primary production hot-spots in the form of coastal and open ocean polynyas was reduced during glacial periods, likely affecting the ecology of populations over time (Thatje et al, 2008). Today, the Scotia Sea is also variable with regards to phytoplankton on both a spatial and temporal scale and is largely dependent on the mixing of water masses (Holm-Hansen et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Reed

Morris

Linse

et al. 2013

Deep Sea Research Part I: Oceanographic Research Papers

Self Cite

View full text Add to dashboard Cite

Cite this article as: Adam J. Reed, James P. Morris, Katrin Linse, Sven Thatje, Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions, Deep-Sea Research I, http://dx.doi.org/10. 1016/j.dsr.2013.07.006 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ability to differentially adapt between cold-stenothermal environments. This study suggests that subtle changes in the environment may lead to a divergence in the ecology of invertebrate populations and showcases the protobranch bivalves as a future model group for the study of speciation and radiation processes through cold-stenothermal environments.

show abstract

Section: Discussionmentioning

confidence: 99%

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Reed

Morris

Linse

et al. 2013

Deep Sea Research Part I: Oceanographic Research Papers

Self Cite

View full text Add to dashboard Cite

show abstract

“…The complex glacial history and climate of the Antarctic ecosystem likely have facilitated evolution of numerous lineages in Antarctic waters (see Thatje et al 2008). Indeed, with application of molecular tools, the number of reported, previously unrecognized, lineages for Antarctic organisms is growing in the literature (e.g., crustaceans, Held 2003; isopods, Held and Wagele 2005;crinoids, Wilson et al 2007; ophiuroids, Hunter and Halanych 2008;pycnogonids, Mahon et al 2008).…”

Section: Introductionmentioning

confidence: 99%

DNA uncovers Antarctic nemertean biodiversity and exposes a decades-old cold case of asymmetric inventory

et al. 2009

View full text Add to dashboard Cite

With threats to biodiversity posed by anthropogenic impacts and global climate change, characterization of existing flora and fauna is increasingly important, but continues to focus predominantly on easily studied taxa. In the Southern Ocean, levels of species richness remain relatively unexplored due to remoteness and difficulties of sampling the region. Nemerteans (proboscis worms; ribbon worms) are unusually abundant and occasionally conspicuous in the Antarctic region. Despite being routinely collected, difficulties in preserving voucher material, morphological limitations, and shortage of taxonomic expertise have hindered our understanding of nemertean diversity. To assess patterns of diversity, we examined a fragment of the mitochondrial 16S rRNA gene from larval and adult nemerteans (n = 192) from 53 sites along the western Antarctic Peninsula. We found 20 distinct lineages having an uncorrected genetic distance (p) greater than 5% to the nearest sister taxon or group, 19 of which have not been genetically characterized in previous studies. Additionally, the putatively dominant adult species in the region, Parborlasia corrugatus, was found to comprise only 4.3% of larvae sampled (n = 3 out of 69 samples from 12 locations). Of 47 nemertean species recorded from Antarctic waters, 20 are heteronemerteans and therefore could have a pelagic pilidium larval phase. These results suggest that Antarctic biodiversity is underestimated, and that unknown species of nemerteans await description from Southern Ocean waters.

show abstract

“…The deposition site of the organic material determines the spatial distribution and composition of Antarctic benthic communities (Orejas et al, 2003;Thrush et al, 2006;Thatje et al, 2008). The redistribution of pelagic production, together with physical factors (e.g., iceberg scouring, anchor ice, resuspension) and the location of polynyas, appear to be the main factors controlling spatial variability in diversity patterns along the western coast of the Ross Sea (Barry et al, 2003;Thrush et al, 2006).…”

Section: Impacts Of Advection On the Antarctic Benthosmentioning

confidence: 99%

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

Life Hung by a Thread: Endurance of Antarctic Fauna in Glacial Periods

Cited by 143 publications

References 79 publications

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

DNA uncovers Antarctic nemertean biodiversity and exposes a decades-old cold case of asymmetric inventory

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

Contact Info

Product

Resources

About