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Dayton, PK, Oliver JS, Thrush SF, Hammerstrom K.  2019.  Bacteria defend carrion from scavengers. Antarctic Science. 31:13-15.   10.1017/s0954102018000457   AbstractWebsite

Carrion in the form of dead seal pups and algal mats placed on soft bottom habitats at Explorers Cove and Salmon Bay, McMurdo Sound, attract scavenging invertebrates that are driven away by hydrogen sulphide produced by sulphate-reducing bacteria sequestered below a layer of Beggiatoa/Thioploca-like filamentous bacteria. This system is usually found for lipid-rich marine mammal carrion, but also occurred with natural algal mats.

Dayton, PK.  1975.  Benthic communities of McMurdo Sound. Antarctic Journal of the United States. 10:136-137. AbstractWebsite
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Oliver, JS, Watson DJ, O'Connor EF, Dayton PK.  1976.  Benthic communities of McMurdo Sound. Antarctic Journal of the United States. 11:58-59. AbstractWebsite
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Dayton, PK, Robillia.Ga.  1971.  Benthic Community near McMurdo Station. Antarctic Journal of the United States. 6:54-&. AbstractWebsite
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Dayton, PK, Paine RT, Robilliard GA.  1970.  Benthic faunal zonation as a result of anchor ice at McMurdo Sound, Antarctica. Antarctic Ecology. 1( Holdgate M, Ed.).:244-258., London: Academic Press Abstract
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Dayton, PK, Kooyman GL, Barry JP.  1984.  Benthic life under thick ice. Antarctic Journal of the United States. 19:128-128. AbstractWebsite
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Dayton, PK, Jarrell SC, Kim S, Parnell PE, Thrush SF, Hammerstrom K, Leichter JJ.  2019.  Benthic responses to an Antarctic regime shift: food particle size and recruitment biology. Ecological Applications. 29   10.1002/eap.1823   AbstractWebsite

Polar ecosystems are bellwether indicators of climate change and offer insights into ecological resilience. In this study, we describe contrasting responses to an apparent regime shift of two very different benthic communities in McMurdo Sound, Antarctica. We compared species-specific patterns of benthic invertebrate abundance and size between the west (low productivity) and east (higher productivity) sides of McMurdo Sound across multiple decades (1960s-2010) to depths of 60 m. We present possible factors associated with the observed changes. A massive and unprecedented shift in sponge recruitment and growth on artificial substrata observed between the 1980s and 2010 contrasts with lack of dramatic sponge settlement and growth on natural substrata, emphasizing poorly understood sponge recruitment biology. We present observations of changes in populations of sponges, bryozoans, bivalves, and deposit-feeding invertebrates in the natural communities on both sides of the sound. Scientific data for Antarctic benthic ecosystems are scant, but we gather multiple lines of evidence to examine possible processes in regional-scale oceanography during the eight years in which the sea ice did not clear out of the southern portion of McMurdo Sound. We suggest that large icebergs blocked currents and advected plankton, allowed thicker multi-year ice, and reduced light to the benthos. This, in addition to a possible increase in iron released from rapidly melting glaciers, fundamentally shifted the quantity and quality of primary production in McMurdo Sound. A hypothesized shift from large to small food particles is consistent with increased recruitment and growth of sponges on artificial substrata, filter-feeding polychaetes, and some bryozoans, as well as reduced populations of bivalves and crinoids that favor large particles, and echinoderms Sterechinus neumayeri and Odontaster validus that predominantly feed on benthic diatoms and large phytoplankton mats that drape the seafloor after spring blooms. This response of different guilds of filter feeders to a hypothesized shift from large to small phytoplankton points to the enormous need for and potential value of holistic monitoring programs, particularly in pristine ecosystems, that could yield both fundamental ecological insights and knowledge that can be applied to critical conservation concerns as climate change continues.

Dayton, PK, Robillia.Ga, Paine RT, Dayton LB.  1974.  Biological accommodation in the benthic community at McMurdo Sound, Antarctica. Ecological Monographs. 44:105-128.   10.2307/1942321   AbstractWebsite
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Dunton, KH, Dayton PK.  1995.  The biology of high latitude kelp. ( Skjoldal H, Hopkins C, Erikstad KE, Leinaas HP, Eds.).:499-507., Tromsø, Norway: Elsevier Abstract
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Dayton, PK, Tegner MJ.  1990.  Bottoms beneath troubled waters: benthic impacts of the 1982-1984 El Nino in the temperate zone. Global ecological consequences of the 1982-83 El Nino-Southern Oscillation. ( Glynn PW, Ed.).:433-472., Amsterdam ; New York: Elsevier Abstract
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Thrush, S, Dayton P, Cattaneo-Vietti R, Chiantore M, Cummings V, Andrew N, Hawes I, Kim S, Kvitek R, Schwarz AM.  2006.  Broad-scale factors influencing the biodiversity of coastal benthic communities of the Ross Sea. Deep-Sea Research Part Ii-Topical Studies in Oceanography. 53:959-971.   10.1016/j.dsr2.2006.02.006   AbstractWebsite

Early ecological research in McMurdo Sound revealed local spatial gradients in community structure associated with variations in anchor ice disturbance, fast ice and snow cover, and the effects of predators. Research contrasting the cast and west sides of McMurdo Sound has shown major differences in benthic communities, which have been attributed to oceanographic influences on the advection of water-column productivity and the frequency of fast ice break-out. Despite these regional and local differences, coastal benthic communities in McMurdo Sound show a high level of stability, and contain a variety of large and potentially very long-lived species. In Terra Nova Bay, about half way along the Victoria Land Coast of the western Ross Sea, the coastal benthic communities provide some insightful contrasts with those in McMurdo Sound. For example, the abundance and depth distribution of dominant species such as Sterechinus neumayeri and Adamussium colbecki are markedly different from McMurdo Sound. In both locations communities dominated by large sponges are most prolific in regions that are free from iceberg disturbance of the seabed. A recent assessment of northern Victoria Land coastal benthic communities, in conjunction with multibeam imagery of the seafloor, further highlights the importance of iceberg disturbance in structuring Antarctic benthic communities. A comparative synthesis of these coastal ecological studies enables us to generate hypotheses concerning the relative importance of different environmental drivers in structuring benthic communities. Overlain on the regular latitudinal shifts in physical factors such as light regime, are regional fluctuations that are controlled by atmospheric and oceanographic circulation patterns and coastal topography/bathymetry. Change in diversity along the western coast of the Ross Sea is predicted to be influenced by three main factors (1) ice disturbance (e.g., via anchor ice and advection of supercooled water or icebergs), (2) photosynthetically available radiation (affected by ice and snow cover and water clarity), (3) the locations of polynyas and advection of planktonic production and larvae. Interactions between these factors are expected to result in non-linear changes along the latitudinal gradient. While predictions generated from these hypotheses remain to be rigorously tested, they provide indications of how benthic communities may respond to changes in production, disturbance and the stability of coastal sea ice. (c) 2006 Elsevier Ltd. All rights reserved.