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<p class=MsoNormal style='vertical-align:baseline'><span
class=article-headermeta-info-label><b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";border:none windowtext 1.0pt;padding:0in'>Marine
Ecology<o:p></o:p></span></b></span></p>
<p class=MsoNormal style='margin-left:0in;text-indent:-.25in;mso-list:l1 level1 lfo5;
vertical-align:baseline'><![if !supportLists]><span style='font-size:10.0pt;
font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span class=article-headermeta-info-label><b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";border:none windowtext 1.0pt;
padding:0in'>First published:</span></b></span><span
class=apple-converted-space><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
border:none windowtext 1.0pt;padding:0in'> </span></b></span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>30 August 2016 <o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:0in;text-indent:-.25in;mso-list:l1 level1 lfo5;
vertical-align:baseline'><![if !supportLists]><span style='font-size:10.0pt;
font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span class=article-headermeta-info-label><b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";border:none windowtext 1.0pt;
padding:0in'>DOI:</span></b></span><span class=apple-converted-space><b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";border:none windowtext 1.0pt;
padding:0in'> </span></b></span><span class=article-headermeta-info-data><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";border:none windowtext 1.0pt;
padding:0in'>10.1111/maec.12301</span></span><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
<h1 style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:5.05pt;
margin-left:0in;vertical-align:baseline'><span style='font-size:8.0pt;
color:black'><o:p> </o:p></span></h1>
<h1 style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:5.05pt;
margin-left:0in;vertical-align:baseline'><span style='font-size:19.0pt;
font-family:"Arial","sans-serif";color:black'>Diversity of faunal assemblages
associated with ribbed mussel beds along the South American coast: relative
roles of biogeography and bioengineering<o:p></o:p></span></h1>
<h3 style='margin:0in;margin-bottom:.0001pt;text-indent:-.25in;mso-list:l0 level1 lfo4;
background:white;vertical-align:baseline'><![if !supportLists]><span lang=ES
style='font-size:10.0pt;font-family:Symbol;font-weight:normal'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=ES style='font-size:12.5pt;
font-family:"Arial","sans-serif";font-weight:normal'>Roger D. Sepúlveda, </span><span
lang=ES style='font-size:12.5pt;font-family:"Arial","sans-serif";font-weight:
normal'>Patricio A. Camus, Carlos A. Moreno<o:p></o:p></span></h3>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
6.0pt;margin-left:0in;text-indent:-.25in;mso-list:l0 level2 lfo4;background:
white;vertical-align:baseline'><![if !supportLists]><span lang=ES
style='font-size:10.0pt'><span style='mso-list:Ignore'>0.<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
lang=ES style='font-size:10.0pt'><o:p> </o:p></span></p>
<h2 style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.1in;
margin-left:0in;vertical-align:baseline'><span style='font-size:16.0pt;
font-family:"Arial","sans-serif";color:#414141'>Abstract<o:p></o:p></span></h2>
<p style='margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline: 0px;
background-position-x:0px;background-position-y:0px'><span style='font-family:
"Arial","sans-serif"'>Benthic organisms are among the most diverse and abundant
in the marine realm, and some species are a key factor in studies related to
bioengineering. However, their importance has not been well noted in
biogeographic studies. Macrofaunal assemblages associated with subtidal beds of
the ribbed mussel (<em><span style='font-family:"Arial","sans-serif";
border:none windowtext 1.0pt;padding:0in'>Aulacomya atra</span></em>) along
South America were studied to assess the relationship between their diversity
patterns and the proposed biogeographic provinces in the Southeastern Pacific
and Southwestern Atlantic Oceans. Samples from ribbed mussel beds were obtained
from 10 sites distributed from the Peruvian coast (17°S) to the Argentinean
coast (41°S). The sampling included eight beds in the Pacific and two in the
Atlantic and the collections were carried out using five 0.04 m</span><sup><span
style='font-size:8.5pt;font-family:"Arial","sans-serif";border:none windowtext 1.0pt;
padding:0in'>2</span></sup><span style='font-family:"Arial","sans-serif"'>quadrants
per site. Faunal assemblages were assessed through classification analyses
using binary and log-transformed abundance data. Variation in the size and
density of mussels, and in the species richness, abundance and structure of
their faunal assemblages were tested using a permutational multivariate
analysis of variance. <u>Faunal assemblages showed a north–south
latitudinal gradient along both the Pacific and Atlantic coasts.</u> Binary and
abundance data showed a difference in the resulting clustering arrangement of
Pacific sites between 40°S and 44°S, indicating a pattern of continuity in the
species distribution associated with biological substrates. At a regional
scale, the distribution of species along the South American coast matched the
general provincial pattern shown by prior studies, which show <u>two
biogeographic units on the Pacific coast separated by an intermediate (probably
transitional) zone</u> and a single province on the Atlantic coast extending up
to Northern Argentina. Biological substrates such as ribbed mussel beds play an
important ecological role by making a similar habitat type available on a large
scale for a variety of invertebrate species. Despite such habitat homogeneity,
however, <u>the associated fauna exhibit marked distribution breaks, suggesting
strong constraints on dispersal</u>. This therefore suggests that macrofaunal
assemblages could possibly be used as <b>biogeographic indicators</b>.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
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