<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1659-4266</journal-id>
<journal-title><![CDATA[Cuadernos de Investigación UNED]]></journal-title>
<abbrev-journal-title><![CDATA[Cuadernos de Investigación UNED]]></abbrev-journal-title>
<issn>1659-4266</issn>
<publisher>
<publisher-name><![CDATA[Universidad Estatal a Distancia de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-42662015000200233</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Abundance patterns (1984-1987 / 1994-1998) of polychaete worms (Annelida) from an estuarine tidal flat, Pacific, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Zamora]]></surname>
<given-names><![CDATA[José A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sibaja-Cordero]]></surname>
<given-names><![CDATA[Jeffrey A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dean]]></surname>
<given-names><![CDATA[Harlan K.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solano-Ulate]]></surname>
<given-names><![CDATA[Sylvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Biología ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Harvard University  ]]></institution>
<addr-line><![CDATA[ MA]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Estudios Generales ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>7</volume>
<numero>2</numero>
<fpage>233</fpage>
<lpage>248</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-42662015000200233&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-42662015000200233&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-42662015000200233&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objectives of this report are to provide an updated list of the annelid polychaete worm species found at a tropical estuarine intertidal flat, describe long term oscillations of 11 of the species, and the impact of red tides as evidenced by PCA.From 1984 to 1987 (49 dates) 14 sediment cores (17.7 cm2- 15 cm deep) were collected per date at low tide from a 400 m2 muddy-sand plot in the Gulf of Nicoya estuary (10oN-85oW), Pacific, Costa Rica. All cores were fixed in Rose Bengal stained formalin and sieved thru a 500 micron mesh screen. A total of 43 species of polychaetes were found and distributed among 25 families and 6 600 individuals, of which 80% were represented by: Mediomastus californiensis (32.4%), Caraziella calafia (20.3%), Paraprionospio alata (9.2%), Scolotema tetraura (5.9%), Gymnonereis crosslandi (4.9%), Spiophanex duplex (3.8%), and Glycinde armigera (3.5%). M. californiensis was numerically dominant during most of the sampling dates. The Spionidae (6), Phyllodocidae (4), and Nereididae (3) were the more speciose polychaete families. Populations of all species were patchy in space and time. The abundance patterns of 11 species are illustrated for the 1984-1987 data set. These patterns may reflect declining populations at the beginning of 1984 perhaps influenced by the strong 1982-1983 ENSO event. During 1985 red tides may have influenced the abundances of polychaetes as indicated by the results of a PCA. This is the first time that population patterns of nine species of intertidal polychaetes over a three year period, and the impact of red tides on these worms are reported for this region of the eastern Pacific. General Additive Models (GAM) were applied to the abundances of M. californiensis and P. alata found during 1984-1987and toadditional data from 1994 to 1996 (28 dates) TheGAM approach confirmed ealier observations of seasonal oscillations of these species during 19841987, but these trends were not found during 1994-1998. Previously unnoticed underlying patterns of unknown origin were also detected by the application of GAM. The theoretical framework needed for the interpretation of results from tropical benthic surveys could improve significantly from more long term monitoring. Long term abundance data is essential to evaluate the impacts of anthropogenic activities in estuaries.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[ResumenLos objetivos de este estudio fueron el proveer una lista actualizada de las especies de gusanos anélidos poliquetos encontrados en una planicie tropical de entre-mareas, describir oscilaciones de largo plazo de 11 de esas especies y el impacto de mareas rojas evidenciadas por el análisis de PCA. Desde 1984 a 1987 (49 fechas) 14 núcleos de sedimento (17.7 cm2- 15 cm de profundidad) fueron colectados por fecha en marea baja en un sitio fangoso-arenoso de 400 m2 en el estuario del Golfo de Nicoya (10oN-85oW), Pacifico, Costa Rica. Todos los núcleos fueron fijados en formalina en agua de mar tenida con Rosa de Bengala y tamizados en una malla de 500 micras de poro. Se encontró un total de 43 especies de gusanos poliquetos distribuidos entre 25 familias y 6 600 individuos, de los que un 80% estaban representados por: Mediomastus californiensis (32.4%), Caraziella calafia (20.3%), Paraprionospio alata (9.2%), Scolotema tetraura (5.9%), Gymnonereis crosslandi (4.9%), Spiophanex duplex (3.8%) y Glycinde armigera (3.5%). M. californiensis fue numéricamente dominante durante la mayoria de las fechas de muestreo. Las Spionidae (6), Phyllodocidae (4), y Nereididae (3) fueron las familias de poliquetos con más especies. Las poblaciones de todas las especies fueron irregulares en el tiempo y en el espacio. Se ilustran los patrones de abundancia de 11 de las especies para el periodo 1984-1987. Estos patrones pueden reflejar poblaciones en decadencia al inicio de 1984, tal vez influenciadas por el fuerte evento ENSO de 1982-1983. Durante 1985 las mareas rojas pueden haber influenciado las abundancias de poliquetos según lo indican los resultados de un PCA. Esta es la primera vez para el Pacífico del Este que se ilustran las oscilaciones poblacionales de nueve especies de poliquetos de entre mareas a lo largo de un período de tres años, así como el impacto de las mareas rojas en estos gusanos. Se aplicó el análisis por Modelos Aditivos Generales (GAM) a las abundancias de M. californiensis y P. alata recolectados durante 1984-1987y adicionalmente entre 1994 y 1996 (28 fechas). El enfoqueGAM confirmó las observaciones anteriores sobre la estacionalidad de estas especies durante 1984-1987, pero estas tendencias no fueron encontradas durante 1994-1998. Mediante el uso de GAM fueron también detectados patrones de origen desconocido no notados anteriormente. El marco teórico necesario para la interpretación de los resultados de estudios bénticos tropicales puede mejorarse mediante la realización de más monitoreos a largo plazo. Datos de abundancia de largo plazo son esenciales para evaluar los impactos de actividades antropogénicas en estuarios.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Macrofauna]]></kwd>
<kwd lng="en"><![CDATA[infauna]]></kwd>
<kwd lng="en"><![CDATA[intertidal]]></kwd>
<kwd lng="en"><![CDATA[benthos]]></kwd>
<kwd lng="en"><![CDATA[GAM]]></kwd>
<kwd lng="en"><![CDATA[PCA]]></kwd>
<kwd lng="en"><![CDATA[red tides.]]></kwd>
<kwd lng="es"><![CDATA[Macrofauna]]></kwd>
<kwd lng="es"><![CDATA[infauna]]></kwd>
<kwd lng="es"><![CDATA[entre-mareas]]></kwd>
<kwd lng="es"><![CDATA[bentos]]></kwd>
<kwd lng="es"><![CDATA[GAM]]></kwd>
<kwd lng="es"><![CDATA[PCA]]></kwd>
<kwd lng="es"><![CDATA[mareas rojas]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alongi]]></surname>
<given-names><![CDATA[D. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ecology of tropical soft-bottom benthos: a review with emphasis on emerging concepts]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1989</year>
<volume>37</volume>
<page-range>85-100</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arntz]]></surname>
<given-names><![CDATA[W.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Brey]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Tarazona]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Robles]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Changes in the structure of a shallow sandy beach community in Peru during an El Niño event]]></article-title>
<source><![CDATA[South African Journal of Marine Science]]></source>
<year>1987</year>
<volume>5</volume>
<page-range>645-58</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrio-Frojan]]></surname>
<given-names><![CDATA[C.R.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Kendall]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Paterson]]></surname>
<given-names><![CDATA[G.L.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hawkins]]></surname>
<given-names><![CDATA[L.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Nimsantijaroen]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Aryuthaka]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Patterns of polychaete diversity in selected intertidal habitats]]></article-title>
<source><![CDATA[Scientia Marina]]></source>
<year>2006</year>
<volume>70S3</volume>
<page-range>239-48</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blake]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Four new species of Carazziela (Polychaeta: Spionidae) from North and South America, with redescriptions of two previously described forms]]></article-title>
<source><![CDATA[Proceedings of the Biological Society of Washington]]></source>
<year>1979</year>
<volume>92</volume>
<page-range>446-81</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Borja]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Dauer]]></surname>
<given-names><![CDATA[D.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Elliott]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Medium-and long-term recovery of estuarine and coastal ecosystems: Patterns, rates, and restoration effectiveness]]></article-title>
<source><![CDATA[Estuaries and Coasts]]></source>
<year>2010</year>
<volume>33</volume>
<page-range>1249-60</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clarke]]></surname>
<given-names><![CDATA[K.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Warwick]]></surname>
<given-names><![CDATA[R.M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Changes in marine communities: an approach to statistical analysis and interpretation]]></source>
<year>1994</year>
<publisher-loc><![CDATA[Plymouth, U.K. ]]></publisher-loc>
<publisher-name><![CDATA[Plymouth Marine Laboratory]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dauer]]></surname>
<given-names><![CDATA[D. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Simon]]></surname>
<given-names><![CDATA[S.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Repopulation of the polychaete fauna of an intertidal habitat following natural defaunation: species equilibrium]]></article-title>
<source><![CDATA[Oecologia]]></source>
<year>1976</year>
<volume>22</volume>
<page-range>99-117</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dean]]></surname>
<given-names><![CDATA[H. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Polychaetes and echiurans]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Wehrtmann]]></surname>
<given-names><![CDATA[I.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Cortés]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Marine Biodiversity of Costa Rica, Central America]]></source>
<year>2009</year>
<page-range>181-91</page-range><publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dittman]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tropical tidal flat benthos compared between Australia and Central America]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Reise]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecological Comparisons of Sedimentary Shores]]></source>
<year>2001</year>
<page-range>275-93</page-range><publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dittmann]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Benthic fauna in tropical tidal flats- a comparative perspective]]></article-title>
<source><![CDATA[Wetlands Ecology and Management]]></source>
<year>2002</year>
<volume>10</volume>
<page-range>189-95</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Epifanio]]></surname>
<given-names><![CDATA[C.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Maurer]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Dittel]]></surname>
<given-names><![CDATA[A.I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Seasonal changes in nutrients and dissolved oxygen in the Gulf of Nicoya, a tropical estuary on the Pacific coast of Central America]]></article-title>
<source><![CDATA[Hydrobiologia]]></source>
<year>1983</year>
<volume>101</volume>
<page-range>231-8</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gaston]]></surname>
<given-names><![CDATA[G.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[D. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Nasci]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estuarine macrobenthos in Calcasieu Lake, Louisiana. Community and trophic structure]]></article-title>
<source><![CDATA[Estuaries]]></source>
<year>1988</year>
<volume>11</volume>
<page-range>182-200</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gray]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Elliott]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecology of Marine Sediments. From Science to Management]]></source>
<year>2010</year>
<edition>2nd</edition>
<publisher-loc><![CDATA[Oxford. U.K. ]]></publisher-loc>
<publisher-name><![CDATA[Oxford]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jennings]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Nicholson]]></surname>
<given-names><![CDATA[M.D.]]></given-names>
</name>
<name>
<surname><![CDATA[Dinmore]]></surname>
<given-names><![CDATA[T.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lancaster]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of chronic trawling disturbance on the production of infaunal communities]]></article-title>
<source><![CDATA[Marine Ecology Progress Series]]></source>
<year>2002</year>
<volume>243</volume>
<page-range>251-60</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[León-Morales]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Macroinfauna of a tropical fjord-like embayment, Golfo Dulce, Costa Rica]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1998</year>
<volume>46</volume>
<numero>^sSupplement 6</numero>
<issue>^sSupplement 6</issue>
<supplement>Supplement 6</supplement>
<page-range>81-90</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Little]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[The biology of soft shores and estuaries]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Oxford. U.K ]]></publisher-loc>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maurer]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Diversity of soft-bottom benthos in a tropical estuary: Gulf of Nicoya, Costa Rica]]></article-title>
<source><![CDATA[Marine Biology]]></source>
<year>1984</year>
<volume>81</volume>
<page-range>97-106</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maurer]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Dean]]></surname>
<given-names><![CDATA[H.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Polychaetous Annelids from the Gulf of Nicoya, Costa Rica]]></article-title>
<source><![CDATA[Internationale Revue ges Hydrobiologie]]></source>
<year>1988</year>
<volume>73</volume>
<page-range>43-59</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meisner]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Hutchings]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spiophanes species (Polychaeta: Spionidae) from eastern Australia - with descriptions of new species, new records and an emended generic diagnosis]]></article-title>
<source><![CDATA[Records of the Australian Museum]]></source>
<year>2003</year>
<volume>5</volume>
<page-range>117-40</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Molina-Lara]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas-Zamora]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Poliquetos (Annelida: Polychaeta) del estero de Jaltepeque, El Salvador una comparación 1959-1991]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1995</year>
<volume>43</volume>
<page-range>195-205</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Olsgard]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Do toxic algal blooms affect subtidal softbottom communities?]]></article-title>
<source><![CDATA[Marince Ecology Progress Series]]></source>
<year>1993</year>
<volume>102</volume>
<page-range>269-86</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Szelistowski]]></surname>
<given-names><![CDATA[W.A.]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spawning pattern and larval recruitment in Gulf of Nicoya anchovies (Pisces: Engraulidae)]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1989</year>
<volume>37</volume>
<page-range>55-62</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reise]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tidal flat ecology. An experimental approach to species interactions]]></source>
<year>1985</year>
<page-range>191</page-range><publisher-loc><![CDATA[Berlin, Germany ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Solano-Ulate]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio comparativo de la estructura de la comunidad de macrofauna bentica en la zona fangosa de Playa Blanca, Punta Morales, Golfo de Nicoya, Costa Rica]]></source>
<year>2007</year>
<publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stephenson]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[W.T.]]></given-names>
</name>
<name>
<surname><![CDATA[Cook]]></surname>
<given-names><![CDATA[S.D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Computer analyses of Peternsen's original data on bottom communities]]></article-title>
<source><![CDATA[Ecological Monographs]]></source>
<year>1970</year>
<volume>42</volume>
<page-range>387-415</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stoner]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Manderson]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pessutti]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spatially explicit analysis of estuarine habitat for juvenile winter flounder: combining Generalized Additive Models and Geographic Information Systems]]></article-title>
<source><![CDATA[Marine Ecology Progress Series]]></source>
<year>2001</year>
<volume>213</volume>
<page-range>253-71</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Szelistowski]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Garita]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mass mortality of sciaenid fishes in the Gulf of Nicoya, Costa Rica]]></article-title>
<source><![CDATA[Fishery Bulletin. U.S]]></source>
<year>1989</year>
<volume>87</volume>
<page-range>363-5</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thrush]]></surname>
<given-names><![CDATA[S.F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spatial patterns in soft-bottom communities]]></article-title>
<source><![CDATA[Trends in Ecology and Evolution]]></source>
<year>1991</year>
<volume>6</volume>
<page-range>75-9</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Predation and community structure of softbottom benthos in Rehoboth Bay, Delaware]]></source>
<year>1979</year>
<page-range>108</page-range><publisher-loc><![CDATA[Delaware, U.S.A ]]></publisher-loc>
<publisher-name><![CDATA[College of Marine Studies, University of Delaware]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[A desription of the structure of a tropical intertidal mud flat community]]></source>
<year>1986</year>
<page-range>181</page-range><publisher-loc><![CDATA[Narragansett, R.I., U.S.A ]]></publisher-loc>
<publisher-name><![CDATA[University of Rhode Island]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The benthic community of an intertidal mud flat in the Gulf of Nicoya, Costa Rica. Description of the community]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1987</year>
<volume>35</volume>
<page-range>229-316</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Community structure of macrobenthos and the results of macropredator exclusion on a tropical mud flat]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1988</year>
<month>a</month>
<volume>36</volume>
<page-range>287-308</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A survey of the meiofauna of an Eastern Tropical Pacific intertidal mud flat]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>1988</year>
<month>b</month>
<volume>36</volume>
<page-range>541-4</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A three year survey of the macrofauna of an intertidal mud flat in the Gulf of Nicoya, Costa Rica]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Magoon]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Converse]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Miner]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Tobin]]></surname>
<given-names><![CDATA[L.T.]]></given-names>
</name>
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proceedings 6th Symposium on Coastal and Ocean Mana gement]]></source>
<year>1989</year>
<volume>2</volume>
<page-range>1905-19</page-range><publisher-loc><![CDATA[New York. U.S.A ]]></publisher-loc>
<publisher-name><![CDATA[American Society Civil Engineers]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Gulf of Nicoya estuary, Costa Rica. Past, present, and future cooperative research]]></article-title>
<source><![CDATA[Helgoländer Meeresuntersuchungen]]></source>
<year>1995</year>
<volume>49</volume>
<page-range>821-8</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ecological dynamics of a tropical intertidal mudflat community]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Nordstrom]]></surname>
<given-names><![CDATA[K.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Roman]]></surname>
<given-names><![CDATA[C.T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estuarine Shores: Evolution, Environments and Human Alterations]]></source>
<year>1996</year>
<page-range>355-71</page-range><publisher-loc><![CDATA[London. U.K ]]></publisher-loc>
<publisher-name><![CDATA[John Wiley &amp; Sons Ltd.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Where the dry forest feed the sea: The Gulf of Nicoya estuary]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Frankie]]></surname>
<given-names><![CDATA[G.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Vinson]]></surname>
<given-names><![CDATA[S. B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biodiversity conservation in Costa Rica: Learning the lessons in a seasonal dry forest]]></source>
<year>2004</year>
<page-range>126-35</page-range><publisher-loc><![CDATA[Berkeley. U.S.A ]]></publisher-loc>
<publisher-name><![CDATA[University of California Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Dean]]></surname>
<given-names><![CDATA[H. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On Branchiostoma californiense (Cephalochordata) from the Gulf of Nicoya estuary, Costa Rica]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>2010</year>
<volume>58</volume>
<page-range>1143-8</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Solano]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On Mellitella stokesii and Amphipholis geminata (Echinodermata), from an intertidal flat in the upper Gulf of Nicoya estuary, Pacific, Costa Rica]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>2011</year>
<volume>59</volume>
<page-range>193-8</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas-Zamora]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Sibaja-Cordero]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A molluscan assemblage from a tropical intertidal estuarine sand-mud flat, Gulf of Nicoya, Pacific, Costa Rica (1984-1987)]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>2011</year>
<volume>59</volume>
<page-range>1135-48</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas-Zamora]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Sibaja-Cordero]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas-Castillo]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Crustaceans from a tropical estuarine sand-mud flat, Pacific, Costa Rica, (1984-1988) revisited]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>2012</year>
<volume>60</volume>
<page-range>1763-81</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Viquez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hargraves]]></surname>
<given-names><![CDATA[P. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Annual cycle of potentially harmful dinoflagellates in the Golfo de Nicoya, Costa Rica]]></article-title>
<source><![CDATA[Bulletin of Marine Science]]></source>
<year>1995</year>
<volume>57</volume>
<page-range>467-75</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Voorhis]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Epifanio]]></surname>
<given-names><![CDATA[C.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Maurer]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Dittel]]></surname>
<given-names><![CDATA[A.I.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The estuarine character of the Gulf of Nicoya, an embayment on the Pacific coast of Central America]]></article-title>
<source><![CDATA[Hydrobiologia]]></source>
<year>1983</year>
<volume>99</volume>
<page-range>225-37</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wear]]></surname>
<given-names><![CDATA[R.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Gardner]]></surname>
<given-names><![CDATA[J.P.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biological effects of the toxic algal bloom of February and March of 1998 on the benthos of Wellington Harbour, New Zealand]]></article-title>
<source><![CDATA[Marine Ecology Progress Series]]></source>
<year>2001</year>
<volume>218</volume>
<page-range>63-76</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Weston]]></surname>
<given-names><![CDATA[D.P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quantitative examination of macrobenthic community structure along an organic encrichment gradient]]></article-title>
<source><![CDATA[Marine Ecology Progress Series]]></source>
<year>1990</year>
<volume>61</volume>
<page-range>233-44</page-range></nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wood]]></surname>
<given-names><![CDATA[S.N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Generalized Additive Models: An introduction]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Boca Raton , Fl. USA ]]></publisher-loc>
<publisher-name><![CDATA[R.C. Chapman &amp; Hall / CRC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wood]]></surname>
<given-names><![CDATA[S.N]]></given-names>
</name>
<name>
<surname><![CDATA[Goude]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Shaw]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Generalized Additive Models for large data sets]]></article-title>
<source><![CDATA[Applied Statistics]]></source>
<year>2015</year>
<volume>64</volume>
<page-range>139-55</page-range></nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yokoyama]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A review of the genus Paraprionospio Caullery (Polychaeta: Spionidae)]]></article-title>
<source><![CDATA[Zoological Journal of the Linnean Society]]></source>
<year>2005</year>
<volume>151</volume>
<page-range>253-84</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
