{"refrec":{"BRefID":301894,"RR":"<b>Ballesta-Artero, I.</b> (2018). Disentangling <i>Arctica islandica's</i> environmental archive: Ecological drivers of its feeding behavior and growth. PhD Thesis. Vrije Universiteit Amsterdam: Amsterdam. ISBN 978-94-028-11599. 210 pp. <a href=\"https://hdl.handle.net/1871/55781\" target=\"_blank\">https://hdl.handle.net/1871/55781</a>","BEntID":294135,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". PhD Thesis. Vrije Universiteit Amsterdam: Amsterdam. ISBN 978-94-028-11599. 210 pp. <a href=\"https://hdl.handle.net/1871/55781\" target=\"_blank\">https://hdl.handle.net/1871/55781</a>","DocTypID":5,"DocType":"Book/Monograph","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ballesta-Artero, I.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ballesta-Artero, I.","Englishabstract":"In these times of global and fast climate change, there is a need to further develop the research fieldof sclerochronology. This relatively new discipline uses the annual banding in the shells of long-livedmollusks to develop long timelines or chronologies. These chronologies can be coupled with localenvironmental records, in the same way as growth rings of trees are used in dendrochronology (Jones,1980; Witbaard et al., 1994; Karney et al., 2011). As such they provide insight into past and presentocean climatic conditions (Schöne et al., 2003; Witbaard et al., 2003; Butler et al., 2013; Mette et al.,2016). Continuous long-term (>50 years) instrumental records of environmental conditions are sparsein the marine environment. Thus, proxy-based environmental reconstructions are needed to improveregional and temporal coverage and to understand past marine climate variability (Jones et al. 2009;Wanamaker et al., 2011; Mette et al., 2016; Steinhardt et al., 2016).The boreal species <i>Arctica islandica</i> (Mollusca, Bivalvia) is an example of a great marine bioarchivedue to its wide distribution and extreme long-life (up to five centuries). This species' shell presentsannual growth increments (or growth bands) which provides dated environmental information by wayof variable growth increments, and microstructural and geochemical properties. However, theduration, timing, and main environmental forces regulating A. <i>islandica</i> ’s growing season still neededfurther study. The combined role of temperature and food in regulating activity patterns and shellgrowth of this bivalve had to be disentangled.Chapter 1 of this thesis describes the main characteristics of the species and the aim of my research.Chapter 2 reports about a fieldwork in situ experiment where we discovered that A. <i>islandica</i>  gapingactivity in northern Norway has an eight months long active season in which valve movements aremainly regulated by food availability. Active gaping periods appear to coincide with periods of growth,indicating that A. <i>islandica</i>  records their environment when its valves are open.A series of food and temperature experiments (Chapter 3 and Chapter 4), where the microstructuralproperties of A. <i>islandica</i>  shells were studied, showed that temperature, but not food, induced achange in the crystallographic orientation of the biomineral units, indicating that this microstructuralproperty may be a potential proxy for seawater temperature. This change in crystallographicorientation was only detected by confocal Raman microscopy (CRM), not by scanning electronmicroscopy (SEM).Chapter 4 explores the combined effects of temperature and food availability on the shell and tissuegrowth of A. <i>islandica</i>  under laboratory conditions. It appeared that the concentration of algal food is the main factor driving siphon activity and with that shell and tissue growth. Thus, these experimentaloutcomes support the results from Chapter 2, where in situ gaping activity was most closely correlatedwith the concentration of chlorophyll-a and to a lesser degree with the seawater temperature.We used a subsample of specimens from above laboratory growth experiment (Chapter 4) to studythe role of environmental and biological controls on trace elemental incorporation of A. <i>islandica</i>  shells(Chapter 5). We found that all trace element-to-calcium ratios (Mg, Sr, Na, and Ba) were significantlyaffected by growth rate. This indicates that physiological processes seem to dominate the controls ofelement incorporation into A. <i>islandica</i>  shells.Chapter 6 describes the energy use of A. <i>islandica</i>  based on a Dynamic Energy Budget model. Ourresults indicate that A. <i>islandica</i> 's extreme longevity arises from its low somatic maintenance cost[?̇?] and low ageing acceleration ℎ̈?. We could not find a direct relationship between food availabilityand lifespan (theory of caloric restriction) in the eight North Atlantic populations studied.Nevertheless, food estimates based on the DEB’s scaled functional response can be a good foodindicator, sometimes the only one, of the benthic food conditions at A. <i>islandica</i>  localities.The main conclusions of this thesis are that (1) A. <i>islandica</i>  gaping and growing season seems to belimited to 8 months of the year, and that food availability and not temperature is the main driver ofthis gaping and growth behavior, (2) some microstructural and geochemical properties of A. <i>islandica</i> shell contain environmental information, but further study still need to be done to use them as areliable environmental proxy, and (3) the extreme longevity of the species is due to its low somaticmaintenance cost and low accumulation of waste that provokes ageing.","AbstractOtherLang":"Para entender mejor el cambio climático a nivel global, es necesario seguir desarrollando campos deinvestigación como la esclerocronología. Esta disciplina, relativamente nueva, utiliza las bandasanuales presentes en las valvas o conchas de moluscos de gran longevidad para desarrollarcronologías. Cronologías que se enlazan con registros ambientales locales, de la misma manera quelos anillos de crecimiento de los árboles se utilizan en dendrocronología (Jones, 1980; Witbaard et al,1994; Karney et al., 2011), para proporcionar información sobre las condiciones climáticas pasadas ypresentes del océano (Schöne et al., 2003; Witbaard et al., 2003; Butler et al., 2013; Mette et al., 2016).Ya que los registros instrumentales continuos de las condiciones ambientales son escasos en el entornomarino, sobre todo por periodos largos de tiempo (> 50 años), se necesitan reconstruccionesambientales basadas en proxis (indicadores indirectos) que mejoren la cobertura regional y temporal,y hagan entender la variabilidad del clima marino (Jones et al., 2009; Wanamaker et al., 2011; Metteet al., 2016; Steinhardt et al., 2016).La especie boreal Arctica <i>islandica</i>  (Mollusca, Bivalvia) es un ejemplo de gran bio-archivo marinodebido a su amplia distribución y extrema longevidad (hasta cinco siglos). La concha de esta especiepresenta incrementos anuales de crecimiento (o bandas de crecimiento) que proporcionaninformación ambiental datada a través de variables tasas de crecimiento y propiedades microestructuralesy geoquímicas. Sin embargo, la longevidad, el periodo y las principales fuerzasambientales que regulan la temporada de crecimiento de A. <i>islandica</i>  necesitaban seguirinvestigándose. El papel combinado de la temperatura y la alimentación en la regulación de lospatrones de actividad y crecimiento de este bivalvo aún no se han esclarecido, y algunos pretendenser explicados en esta tesis.El Capítulo 1 describe las principales características de la especie y el objetivo de mi investigación.El Capítulo 2 informa sobre un experimento de campo in situ donde descubrimos que la actividad deapertura de las valvas de A. <i>islandica</i>  en el norte de Noruega tiene una temporada activa de ochomeses, en la cual sus movimientos están regulados principalmente por la disponibilidad de alimento.Este movimiento parece coincidir con el crecimiento de estas, lo que indica que A. <i>islandica</i>  registra suentorno cuando sus valvas están abiertas.Una serie de experimentos con diversas temperaturas y fuentes de alimento (Capítulo 3 y Capítulo4), donde se estudiaron las propiedades microestructurales de la concha de A. <i>islandica</i> , mostró quela temperatura, no el alimento, induce un cambio en la orientación cristalográfica de las unidadesbiominerales, indicando que esta propiedad microestructural puede ser un proxy potencial para la temperatura marina. Pese a haber utilizado también microscopía electrónica de barrido (SEM) para elanálisis, este cambio en la orientación cristalográfica solo se detectó a través de espectroscopía Raman (CRM).El Capítulo 4 explora los efectos combinados de la temperatura y el alimento en el crecimiento del tejido y la concha de A. islándica en condiciones de laboratorio. Parece que la concentración de fitoplancton es el factor principal que impulsa la actividad de los sifones y en consecuencia, el crecimiento del tejido y de la concha. Por lo tanto, estos resultados experimentales respaldan los resultados del Capítulo 2, donde la actividad de apertura in situ se correlacionó estrechamente con la concentración de clorofila-a y en menor grado con la temperatura marina.En el Capítulo 5, utilizamos una submuestra de especímenes del experimento anterior de crecimiento en laboratorio (Capítulo 4) para estudiar el papel del control ambiental y biológico en la incorporación de elementos traza en las conchas de A. <i>islandica</i> . Encontramos que todas las proporciones de elementos (Mg, Sr, Na y Ba) respecto al calcio se vieron significativamente afectadas por la tasa de crecimiento. Esto indica que los procesos fisiológicos contribuyen al control sobre la incorporación de estos elementos en la concha de A. <i>islandica</i> .El Capítulo 6 describe el uso de energía de A. <i>islandica</i>  basado en un modelo de balance energético dinámico, DEB (por sus siglas en inglés, Dynamic Energy Budget). Nuestros resultados indican que la extrema longevidad de A. <i>islandica</i>  se debe a su bajo coste de mantenimiento [�̇�] y baja aceleraciónde envejecimiento ℎ̈ �. No pudimos encontrar una relación directa entre la disponibilidad de alimentoy la esperanza de vida (teoría de la restricción calórica) en las ocho poblaciones estudiadas en el Atlántico Norte. Sin embargo, las estimaciones de alimento basadas en la respuesta funcional escalada del DEB pueden ser un buen indicador, a veces el único, de la disponibilidad de alimento en la zona bentónica donde se encuentre A. <i>islandica</i> .Las principales conclusiones que se recogen esta tesis son: (1) la apertura de A. <i>islandica</i>  y su temporada de crecimiento parecen estar limitadas a ocho meses del año, y están impulsadas por la disponibilidad de alimento y no por la temperatura, (2) algunas propiedades microestructurales y geoquímicas de la concha de A. <i>islandica</i>  contienen información ambiental, pero aún se necesitan estudios adicionales para utilizarlas como un proxy ambiental confiable, y (3) la extrema longevidad de la especie se debe a su bajo coste de mantenimiento somático y a la baja acumulación de desechosque provocan el envejecimiento.","BibLvlCode":"M","StandardTitle":"Disentangling <i>Arctica islandica's</i> environmental archive: Ecological drivers of its feeding behavior and growth","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":2018,"DateUpdate":"2020-06-08","DateCreate":"2018-10-09","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1,"Handle":"1871/55781"},"refs":null,"anarec":null,"monrec":{"MonID":301894,"ISBN":"978-94-028-11599","PubliDate":2018,"IssueDate":null,"Volume":null,"Issue":null,"Pagination":"210","Place":"Amsterdam","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":null,"SerRR":null,"Ser2BRefID":null,"Ser2RR":null,"StandardTitleSer":null,"ISSN":null,"AbbrevSer":null,"Degree":"PhD","ThesisID":301894,"InsID":null,"Acronym":null,"FullStandardName":null,"ToPubliDate":null,"SerNotes":null,"eISBN":null,"Pages":210},"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Ballesta-Artero","Firstname":"Irene","Initials":"I.","Affiliation":"EDS","Discriminator":null,"CorporateFlag":0,"BEntID":294135,"AutID":254100,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"EDS","InsFSN":"Koninklijk Nederlands Instituut voor Onderzoek der Zee; 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