Antarctic Futures: An Assessment of Climate-Driven Changes in Ecosystem Structure, Function, and Service Provisioning in the Southern Ocean.

In this article, we analyze the impacts of climate change on Antarctic marine ecosystems. Observations demonstrate large-scale changes in the physical variables and circulation of the Southern Ocean driven by warming, stratospheric ozone depletion, and a positive Southern Annular Mode. Alterations in the physical environment are driving change through all levels of Antarctic marine food webs, which differ regionally. The distributions of key species, such as Antarctic krill, are also changing. Differential responses among predators reflect differences in species ecology. The impacts of climate change on Antarctic biodiversity will likely vary for different communities and depend on species range. Coastal communities and those of sub-Antarctic islands, especially range-restricted endemic communities, will likely suffer the greatest negative consequences of climate change. Simultaneously, ecosystem services in the Southern Ocean will likely increase. Such decoupling of ecosystem services and endemic species will require consideration in the management of human activities such as fishing in Antarctic marine ecosystems. Expected final online publication date for the Annual Review of Marine Science Volume 12 is January 3, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

[1]  N. Gillett,et al.  Recent Southern Ocean warming and freshening driven by greenhouse gas emissions and ozone depletion , 2018, Nature Geoscience.

[2]  S. Rintoul,et al.  Change in Dense Shelf Water and Adélie Land Bottom Water Precipitated by Iceberg Calving , 2018 .

[3]  E. Murphy,et al.  Stepping stones to isolation: Impacts of a changing climate on the connectivity of fragmented fish populations , 2018, Evolutionary applications.

[4]  Scott C. Doney,et al.  Sustained climate warming drives declining marine biological productivity , 2018, Science.

[5]  Richard A. McMahon,et al.  Modelling, control and sensorless speed estimation of micro-wind turbines for deployment in Antarctica , 2018 .

[6]  G. Watters,et al.  Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea , 2018, PloS one.

[7]  Constance A. Johnson.  The Relevance of the Southern Ocean to the Development of a Global Regime for Marine Areas beyond National Jurisdiction—An Uncommon Commons , 2017 .

[8]  Ben. G. Weinstein,et al.  Dynamic foraging of a top predator in a seasonal polar marine environment , 2017, Oecologia.

[9]  P. Falkowski,et al.  Light availability rather than Fe controls the magnitude of massive phytoplankton bloom in the Amundsen Sea polynyas, Antarctica , 2017 .

[10]  B. Frame,et al.  Is it all going south? Four future scenarios for Antarctica , 2017, Polar Record.

[11]  Weijian Zhou,et al.  Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I , 2017, Scientific Reports.

[12]  Stanley T. Asah,et al.  Valuing nature's contributions to people: the IPBES approach , 2017 .

[13]  D. Hodgson,et al.  Past penguin colony responses to explosive volcanism on the Antarctic Peninsula , 2017, Nature Communications.

[14]  C. Ainsworth,et al.  Trophodynamic effects of climate change-induced alterations to primary production along the western Antarctic Peninsula , 2017 .

[15]  D. Wolf-Gladrow,et al.  Mesoscale features create hotspots of carbon uptake in the Antarctic Circumpolar Current , 2017 .

[16]  E. Pakhomov,et al.  Trans-Atlantic variability in ecology of the pelagic tunicate Salpa thompsoni near the Antarctic Polar Front , 2017 .

[17]  D. Wolf-Gladrow,et al.  Sinkers or floaters? Contribution from salp pellets to the export flux during a large bloom event in the Southern Ocean , 2017 .

[18]  D. Wolf-Gladrow,et al.  Controls of primary production in two phytoplankton blooms in the Antarctic Circumpolar Current , 2017, Deep-sea research. Part II, Topical studies in oceanography.

[19]  Walker O. Smith,et al.  Associated dataset: Climate change impacts on southern Ross Sea phytoplankton composition, productivity and export , 2017 .

[20]  C. Mora,et al.  Major impacts of climate change on deep-sea benthic ecosystems , 2017 .

[21]  Sunke Schmidtko,et al.  Decline in global oceanic oxygen content during the past five decades , 2017, Nature.

[22]  P. Sedwick,et al.  Dissolved iron transport pathways in the Ross Sea: Influence of tides and horizontal resolution in a regional ocean model , 2017 .

[23]  F. Roquet,et al.  The ocean mixed-layer under Southern Ocean sea-ice: Seasonal cycle and forcing , 2017 .

[24]  E. Stewart,et al.  The evolution of polar tourism scholarship: research themes, networks and agendas , 2017 .

[25]  M. T. Maldonado,et al.  Southern Ocean biological iron cycling in the pre-whaling and present ecosystems , 2016, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[26]  E. Murphy,et al.  Understanding the structure and functioning of polar pelagic ecosystems to predict the impacts of change , 2016, Proceedings of the Royal Society B: Biological Sciences.

[27]  C. Cerf,et al.  Cytotoxic activity of marine sponge extracts from the sub-Antarctic Islands and the Southern Ocean , 2016 .

[28]  S. Doney,et al.  Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993–2013) analysis , 2016 .

[29]  A. Piñones,et al.  Projected changes of Antarctic krill habitat by the end of the 21st century , 2016 .

[30]  Corinne Le Quéré,et al.  Role of zooplankton dynamics for Southern Ocean phytoplankton biomass and global biogeochemical cycles , 2016 .

[31]  Adrian P. Martin,et al.  A Dark Hole in Our Understanding of Marine Ecosystems and Their Services: Perspectives from the Mesopelagic Community , 2016, Front. Mar. Sci..

[32]  A. Rogers,et al.  Population structure and phylogeography of the Gentoo Penguin (Pygoscelis papua) across the Scotia Arc , 2016, Ecology and evolution.

[33]  W. Fagan,et al.  In stark contrast to widespread declines along the Scotia Arc, a survey of the South Sandwich Islands finds a robust seabird community , 2016, Polar Biology.

[34]  K. Arrigo,et al.  Iron supply and demand in an Antarctic shelf ecosystem , 2015 .

[35]  Taro Takahashi,et al.  The reinvigoration of the Southern Ocean carbon sink , 2015, Science.

[36]  H. Ducklow,et al.  The imbalance of new and export production in the western Antarctic Peninsula, a potentially “leaky” ecosystem , 2015 .

[37]  A. Rogers,et al.  Too much of a good thing: sea ice extent may have forced emperor penguins into refugia during the last glacial maximum , 2015, Global change biology.

[38]  Fengming Hui,et al.  Ocean-driven thinning enhances iceberg calving and retreat of Antarctic ice shelves , 2015, Proceedings of the National Academy of Sciences.

[39]  G. Tarling,et al.  The contribution of zooplankton faecal pellets to deep-carbon transport in the Scotia Sea (Southern Ocean) , 2014 .

[40]  E. Murphy,et al.  Krill, climate, and contrasting future scenarios for Arctic and Antarctic fisheries , 2014 .

[41]  M. Holland,et al.  Projected continent-wide declines of the emperor penguin under climate change , 2014 .

[42]  H. Lynch,et al.  First global census of the Adélie Penguin , 2014 .

[43]  E. Hofmann,et al.  The effects of changing winds and temperatures on the oceanography of the Ross Sea in the 21st century , 2014 .

[44]  M. Scheidat,et al.  Counting whales in a challenging, changing environment , 2014, Scientific Reports.

[45]  K. Arrigo,et al.  The oceanography and ecology of the Ross Sea. , 2014, Annual review of marine science.

[46]  Atul K. Jain,et al.  Global Carbon Budget 2016 , 2016 .

[47]  M. Lima,et al.  Warming effects in the western Antarctic Peninsula ecosystem: the role of population dynamic models for explaining and predicting penguin trends , 2013, Population Ecology.

[48]  S. Jacobs,et al.  Antarctic climate change and the environment: an update , 2013, Polar Record.

[49]  M. Meredith,et al.  The Southern Ocean Observing System , 2012 .

[50]  Kate E. Lowry,et al.  ASPIRE: The Amundsen Sea Polynya International Research Expedition , 2012 .

[51]  J. Fyfe,et al.  Observed and simulated changes in the Southern Hemisphere surface westerly wind‐stress , 2012 .

[52]  T. Mueller,et al.  First direct, site-wide penguin survey at Deception Island, Antarctica, suggests significant declines in breeding chinstrap penguins , 2012, Polar Biology.

[53]  W. Trivelpiece,et al.  Differential advancement of breeding phenology in response to climate may alter staggered breeding among sympatric pygoscelid penguins , 2012 .

[54]  J. Santora,et al.  Population dynamics of Salpa thompsoni near the Antarctic Peninsula: Growth rates and interannual variations in reproductive activity (1993–2009) , 2012 .

[55]  David Rind,et al.  Regions of rapid sea ice change: An inter‐hemispheric seasonal comparison , 2012 .

[56]  M. Collins,et al.  Spatial and Temporal Operation of the Scotia Sea Ecosystem , 2012 .

[57]  P. Kushner,et al.  Signatures of the Antarctic ozone hole in Southern Hemisphere surface climate change , 2011 .

[58]  A. McIntosh,et al.  From frozen continent to tourism hotspot? Five decades of Antarctic tourism development and management, and a glimpse into the future , 2011 .

[59]  P. Trathan,et al.  First Recorded Loss of an Emperor Penguin Colony in the Recent Period of Antarctic Regional Warming: Implications for Other Colonies , 2011, PloS one.

[60]  W. Trivelpiece,et al.  Foraging-Niche Separation of Breeding Gentoo and Chinstrap Penguins, South Shetland Islands, Antarctica , 2010 .

[61]  Andrew Fleming,et al.  Negative feedback in the cold: ice retreat produces new carbon sinks in Antarctica , 2010 .

[62]  S. Khatiwala,et al.  Reconstruction of the history of anthropogenic CO2 concentrations in the ocean , 2009, Nature.

[63]  John Turner,et al.  Non‐annular atmospheric circulation change induced by stratospheric ozone depletion and its role in the recent increase of Antarctic sea ice extent , 2009 .

[64]  S. Stammerjohn,et al.  Recent Changes in Phytoplankton Communities Associated with Rapid Regional Climate Change Along the Western Antarctic Peninsula , 2009, Science.

[65]  Hal Caswell,et al.  Demographic models and IPCC climate projections predict the decline of an emperor penguin population , 2009, Proceedings of the National Academy of Sciences.

[66]  Brennan T. Phillips,et al.  Defecation by Salpa thompsoni and its contribution to vertical flux in the Southern Ocean , 2009 .

[67]  Richard J. Matear,et al.  Southern Ocean acidification: A tipping point at 450-ppm atmospheric CO2 , 2008, Proceedings of the National Academy of Sciences.

[68]  W. Trivelpiece,et al.  Chinstrap penguins alter foraging and diving behavior in response to the size of their principle prey, Antarctic krill , 2008 .

[69]  D. Borchers,et al.  Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica , 2008, Antarctic Science.

[70]  A. Rogers.  Evolution and biodiversity of Antarctic organisms: a molecular perspective , 2007, Philosophical Transactions of the Royal Society B: Biological Sciences.

[71]  Casper Labuschagne,et al.  Saturation of the Southern Ocean CO2 Sink Due to Recent Climate Change , 2007, Science.

[72]  S. Riser,et al.  Decadal Spinup of the South Pacific Subtropical Gyre , 2007 .

[73]  Victor Smetacek,et al.  Polar ocean ecosystems in a changing world , 2005, Nature.

[74]  Nicolas Gruber,et al.  The Oceanic Sink for Anthropogenic CO2 , 2004, Science.

[75]  P. Stott,et al.  Causes of exceptional atmospheric circulation changes in the Southern Hemisphere , 2004 .

[76]  L. Quetin,et al.  Episodic recruitment in Antarctic krill Euphausia superba in the Palmer LTER study region , 2003 .

[77]  David W. J. Thompson,et al.  Interpretation of Recent Southern Hemisphere Climate Change , 2002, Science.

[78]  I. Boyd,et al.  Postsealing genetic variation and population structure of two species of fur seal (Arctocephalus gazella and A. tropicalis) , 2000, Molecular ecology.

[79]  S. Robinson,et al.  PREDATION BY A HOOKER'S SEA LION (PHOCARCTOS HOOKERI) ON A SMALL POPULATION OF FUR SEALS (ARCTOCEPHALUS SPP.) AT MACQUARIE ISLAND , 1999 .

[80]  C. Moritz,et al.  Molecular population genetics of the southern elephant seal Mirounga leonina. , 1998, Genetics.

[81]  W. R. Fraser,et al.  Effects of sea-ice extent and krill or salp dominance on the Antarctic food web , 1997, Nature.

[82]  P. Trathan,et al.  The Importance of Krill Predation in the Southern Ocean , 2016 .

[83]  A. Kato,et al.  Recent studies overestimate colonization and extinction events for Adelie Penguin breeding colonies , 2016, The Auk.

[84]  A. Rogers,et al.  A Biophysical and Economic Profile of South Georgia and the South Sandwich Islands as Potential Large-Scale Antarctic Protected Areas. , 2015, Advances in marine biology.

[85]  J. Laake,et al.  A REVIEW OF DATA ON ABUNDANCE, TRENDS IN ABUNDANCE, HABITAT USE AND DIET OF ICE-BREEDING SEALS IN THE SOUTHERN OCEAN , 2012 .

[86]  V. Laptikhovsky.  Migrations and structure of the species range in ridge-scaled rattail Macrourus carinatus (Southwest Atlantic) and their application to fisheries management , 2011 .

[87]  Kau-Fui V. Wong,et al.  Offshore Wind Power and its Potential for Development in the West Wind Drift , 2010 .

[88]  M. Pinkerton,et al.  A BALANCED MODEL OF THE FOOD WEB OF THE ROSS SEA, ANTARCTICA , 2010 .

[89]  L. Quetin,et al.  Life Under Antarctic Pack Ice: A Krill Perspective , 2009 .

[90]  T. Knowles,et al.  Whale watching worldwide: tourism numbers, expenditures and expanding economic benefits. A special report from the International Fund for Animal Welfare. , 2009 .

[91]  M. Hindell,et al.  Population status, trends and a re-examination of the hypotheses explaining the recent declines of the southern elephant seal Mirounga leonina , 2005 .

[92]  P. Froneman,et al.  Salp/krill interactions in the Southern Ocean:spatial segregation and implications for the carbon flux , 2002 .

[93]  Dirk Olbers,et al.  The Antarctic Circumpolar Current System , 1999 .

[94]  Gregory C. Johnson,et al.  Circulation, mixing, and production of Antarctic Bottom Water , 1999 .