January 1, 2020 Journal article Open Access

Fossile, Eleonora; Nardelli, Maria Pia; Jouini, Arbia; LANSARD, Bruno; Pusceddu, Antonio; Moccia, Davide; Michel, Elisabeth; Peron, Olivier; Howa, Hélène; Mojtahid, Meryem

Dublin Core Export

<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Fossile, Eleonora</dc:creator>
  <dc:creator>Nardelli, Maria Pia</dc:creator>
  <dc:creator>Jouini, Arbia</dc:creator>
  <dc:creator>LANSARD, Bruno</dc:creator>
  <dc:creator>Pusceddu, Antonio</dc:creator>
  <dc:creator>Moccia, Davide</dc:creator>
  <dc:creator>Michel, Elisabeth</dc:creator>
  <dc:creator>Peron, Olivier</dc:creator>
  <dc:creator>Howa, Hélène</dc:creator>
  <dc:creator>Mojtahid, Meryem</dc:creator>
  <dc:date>2020-01-01</dc:date>
  <dc:description>Abstract. The rapid response of benthic foraminifera to environmental factors
(e.g. organic matter quality and quantity, salinity, pH) and their
high fossilisation potential make them promising bio-indicators for
the intensity and recurrence of brine formation in Arctic seas. Such
an approach, however, requires a thorough knowledge of their modern
ecology in such extreme settings. To this aim, seven stations along
a north–south transect across the Storfjorden (Svalbard archipelago) have been
sampled using an interface multicorer. This fjord is an area of
intense sea ice formation characterised by the production of
brine-enriched shelf waters (BSW) as a result of a recurrent
latent-heat polynya. Living (rose bengal-stained) foraminiferal
assemblages were analysed together with geochemical and
sedimentological parameters in the top 5 cm of the
sediment. Three major biozones were distinguished. (i) The "inner
fjord" zone, dominated by typical glacier proximal calcareous species, which
opportunistically respond to fresh organic matter inputs. (ii) The
"deep basins and sill" zone, characterised by glacier distal agglutinated
fauna; these are either dominant because of the mostly
refractory nature of organic matter and/or the brine persistence that
hampers the growth of calcareous species and/or causes their
dissolution. (iii) The "outer fjord" zone, characterised by typical North
Atlantic species due to the intrusion of the North Atlantic water in
the Storfjordrenna. The stressful conditions present in the deep
basins and sill (i.e. acidic waters and low food quality) result in
a high agglutinated ∕ calcareous ratio (A∕C). This supports the
potential use of the A∕C ratio as a proxy for brine persistence and
overflow in Storfjorden.</dc:description>
  <dc:identifier>https://www.openaccessrepository.it/record/29333</dc:identifier>
  <dc:identifier>10.5194/bg-17-1933-2020</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>https://creativecommons.org/licenses/by/4.0/</dc:rights>
  <dc:subject>Earth-Surface Processes</dc:subject>
  <dc:subject>Ecology, Evolution, Behavior and Systematics</dc:subject>
  <dc:title>Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory"</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>