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Author (up) Lardies, M.A.; Arias, M.B.; Poupin, M.J.; Manriquez, P.H.; Torres, R.; Vargas, C.A.; Navarro, J.M.; Lagos, N.A. pdf  doi
openurl 
  Title Differential response to ocean acidification in physiological traits of Concholepas concholepas populations Type
  Year 2014 Publication Journal Of Sea Research Abbreviated Journal J. Sea Res.  
  Volume 90 Issue Pages 127-134  
  Keywords Environmental gradient; Gastropod; Metabolism; HsP70; Gene expression; Phenotypic flexibility  
  Abstract Phenotypic adaptation to environmental fluctuations frequently occurs by preexisting plasticity and its role as a major component of variation in physiological diversity is being widely recognized. Few studies have considered the change in phenotypic flexibility among geographic populations in marine calcifiers to ocean acidification projections, despite the fact that this type of study provides understanding about how the organism may respond to this chemical change in the ocean. We examined the geographic variation in CO2 seawater concentrations in the phenotype and in the reaction norm of physiological traits using a laboratory mesocosm approach with short-term acclimation in two contrasting populations (Antofagasta and Calfuco) of the intertidal snail Concholepas concholepas. Our results show that elevated pCO(2) conditions increase standard metabolic rates in both populations of the snail juveniles, likely due to the higher energy cost of homeostasis. juveniles of C concholepas in the Calfuco (southern) population showed a lower increment of metabolic rate in high-pCO(2) environments concordant with a lesser gene expression of a heat shock protein with respect to the Antofagasta (northern) population. Combined these results indicate a negative effect of ocean acidification on whole-organism functioning of C. concholepas. Finally, the significant Population x pCO(2) level interaction in both studied traits indicates that there is variation between populations in response to high-pCO(2) conditions. (C) 2014 Elsevier BM. All rights reserved.  
  Address [Lardies, Marco A.; Belen Arias, Maria] Univ Adolfo Ibanez, Fac Artes Liberles, Santiago, Chile, Email: marco.lardies@ual.cl  
  Corporate Author Thesis  
  Publisher Elsevier Science Bv Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1385-1101 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000337854800013 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 381  
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Author (up) Manriquez, P.H.; Jara, M.E.; Torres, R.; Mardones, M.L.; Lagos, N.A.; Lardies, M.A.; Vargas, C.A.; Duarte, C.; Navarro, J.M. pdf  doi
openurl 
  Title Effects of ocean acidification on larval development and early post-hatching traits in Concholepas concholepas (loco) Type
  Year 2014 Publication Marine Ecology Progress Series Abbreviated Journal Mar. Ecol.-Prog. Ser.  
  Volume 514 Issue Pages 87-103  
  Keywords Hatching time; Hatching success; Early larval survival; Protoconch size; Protoconch thickness; Statolith size; Egg capsule wall thickness; Developmental plasticity  
  Abstract Larval stages represent a bottleneck influencing the persistence of marine populations with complex life cycles. Concholepas concholepas is a gastropod species that sustains the most important small-scale artisanal fisheries of the Chile-Peru Humboldt Coastal current system. In this study, newly-laid egg capsules of C. concholepas collected from 3 localities along the Chilean coast were used to evaluate the potential consequences of projected near-future ocean acidification (OA) on larval development and early post-hatching larval traits. We compared hatching time, hatching success and early survivorship of encapsulated larvae reared under contrasting average levels of pCO(2): 382 (present-day), ca. 715 and ca. 1028 μatm CO2 (levels expected in near-future scenarios of OA). Moreover, we compared morphological larval traits such as protoconch size, thickness and statolith size at hatching. Some of the developmental traits were negatively affected by pCO(2) levels, source locality, female identity, or the interaction between those factors. Meanwhile, the effect of pCO(2) levels on morphological larval traits showed significant interactions depending on differences among egg capsules and females. Our results suggest that OA may decouple hatching time from oceanographic processes associated with larval transport and reduce larval survivorship during the dispersive phase, with a potential impact on the species' population dynamics. However, the results also show geographic variability and developmental plasticity in the investigated traits. This variation may lead to an increased acclimatization ability, facilitate the persistence of natural populations and mitigate the negative effects that OA might have on landings and revenues derived from the fishery of this species.  
  Address [Manriquez, Patricio H.; Elisa Jara, Maria] CEAZA, LECOT, Coquimbo, Chile, Email: patriciohmanriquez@gmail.com  
  Corporate Author Thesis  
  Publisher Inter-Research Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0171-8630 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000345700700007 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 430  
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Author (up) Navarro, J.M.; Duarte, C.; Manriquez, P.H.; Lardies, M.A.; Torres, R.; Acuna, K.; Vargas, C.A.; Lagos, N.A. pdf  doi
openurl 
  Title Ocean warming and elevated carbon dioxide: multiple stressor impacts on juvenile mussels from southern Chile Type
  Year 2016 Publication Ices Journal Of Marine Science Abbreviated Journal ICES J. Mar. Sci.  
  Volume 73 Issue 3 Pages 764-771  
  Keywords high CO2; multiple stressors; mussels; ocean warming; scope for growth; thermal window  
  Abstract The combined effect of increased ocean warming and elevated carbon dioxide in seawater is expected to have significant physiological and ecological consequences at many organizational levels of the marine ecosystem. In the present study, juvenile mussels Mytilus chilensis were reared for 80 din a factorial combination of two temperatures (12 and 16 degrees C) and three pCO(2) levels (380, 700, and 1000 μatm). We investigated the combined effects of increasing seawater temperature and pCO(2) on the physiological performance (i.e. feeding, metabolism, and growth). Lower clearance rate (CR) occurred at the highest pCO(2) concentration (1000 μatm) compared with the control (380 μatm) and with the intermediate concentration of pCO(2) (700 μatm). Conversely, CR was significantly higher at 16 degrees C than at 12 degrees C. Significant lower values of oxygen uptake were observed in mussels exposed to 1000 μatm pCO(2) level compared with those exposed to 380 μatm pCO(2). Scope for growth (SFG) was significantly lower at the highest pCO(2) concentration compared with the control. Mussels exposed to 700 μatm pCO(2) did not show significantly different SFG from the other two pCO(2) treatments. SFG was significantly higher at 16 degrees C than at 12 degrees C. This might be explained because the experimental mussels were exposed to temperatures experienced in their natural environment, which are within the range of thermal tolerance of the species. Our results suggest that the temperature rise within the natural range experienced by M. chilensis generates a positive effect on the processes related with energy gain (i.e. feeding and absorption) to be allocated to growth. In turn, the increase in the pCO(2) level of 1000 μatm, independent of temperature, adversely affects this species, with significantly reduced energy allocated to growth (SFG) compared with the control treatment.  
  Address [Navarro, Jorge M.; Acuna, Karin] Univ Austral Chile, Fac Ciencias, Lab Costero Calfuco, Inst Ciencias Marinas & Limnol, Valdivia, Chile, Email: jnavarro@uach.cl  
  Corporate Author Thesis  
  Publisher Oxford Univ Press Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1054-3139 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000371142000025 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 587  
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Author (up) Osores, S.J.A.; Lagos, N.A.; Martin, V.S.; Manriquez, P.H.; Vargas, C.A.; Torres, R.; Navarro, J.M.; Poupin, M.J.; Saldias, G.S.; Lardies, M.A. pdf  doi
openurl 
  Title Plasticity and inter-population variability in physiological and life-history traits of the mussel Mytilus chilensis: A reciprocal transplant experiment Type
  Year 2017 Publication Journal Of Experimental Marine Biology And Ecology Abbreviated Journal J. Exp. Mar. Biol. Ecol.  
  Volume 490 Issue Pages 1-12  
  Keywords Salinity; Ocean acidification; Estuaries; Heat shock protein; Ingestion rate; Metabolism; Calcification; Aquaculture  
  Abstract Geographically widespread species must cope with environmental differences between habitats. Information concerning geographic variations in response to climate variability is critical because many morphological, life history and physiological traits show variation across space. Reciprocal transplant experiments have shown to be relevant to evaluate the role of phenotypic plasticity and potential local adaptation in ecophysiological responses when coping with environmental variability. In this study, we characterize through reciprocal transplant experiments the reaction norms of morphological, biochemical, physiological and life-history traits between two intertidal populations of the socioeconomically important mussel Mytilus chilensis, inhabiting contrasting local environments (estuarine vs coastal habitats). We found a gradient in phenotypic plasticity with plastic trait responses in metabolic, ingestion and clearance rates, and in HsP(70) gene expression, and some traits with responses more canalized as growth and calcification rates. This emphasizes that responses not only vary across different local populations but also in different traits in M. chilensis, thus it is difficult to establish an overall trend of the responses at integrated organismal level. Moreover, the synergistic interaction of factors such as salinity and carbonate system parameters evaluated make it necessary to study the response at the population level with emphasis on benthic species important in aquaculture. Finally, field studies such as this one are useful for documenting the patterns of traits variation that occur in nature, identifying possible causes of such variation, and generating testable hypotheses for future controlled experiments. (C) 2017 Elsevier B.V. All rights reserved.  
  Address [Osores, Sebastian J. A.; Josefina Poupin, M.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Diagonal Torres 2640, Santiago, Chile, Email: marco.lardies@uai.cl  
  Corporate Author Thesis  
  Publisher Elsevier Science Bv Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0022-0981 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000397698200001 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 716  
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Author (up) Torres, R.; Manriquez, P.H.; Duarte, C.; Navarro, J.M.; Lagos, N.A.; Vargas, C.A.; Lardies, M.A. pdf  url
openurl 
  Title Evaluation of a semi-automatic system for long-term seawater carbonate chemistry manipulation Type
  Year 2013 Publication Revista Chilena De Historia Natural Abbreviated Journal Rev. Chil. Hist. Nat.  
  Volume 86 Issue 4 Pages 443-451  
  Keywords carbonate chemistry manipulation; ocean acidification  
  Abstract The assessment of the effects of Ocean Acidification (OA) on marine life has received increasing attention in recent marine research. On a mesocosmic scale, the CO2 levels in seawater can be manipulated to evaluate experimentally the consequences of OA on marine organisms (vertebrates and invertebrates). An ideal manipulation of carbonate chemistry should mimic exactly the changes to carbonate chemistry, which will occur in years to come. Although some methods have been described in the literature, here we describe in detail a simple, robust and inexpensive system to produce CO2-enriched seawater by bubbling the seawater with air-CO2 mixtures. The system uses mass flow controllers (MFC) to blend atmospheric air with pure CO2 to produce two pCO(2) levels. The air-CO2 mixtures are delivered continuously to seawater equilibration reservoirs, and simultaneously to an infrared CO2 analyser to verify CO2 levels in the air-CO2 mixture delivered to the equilibration tanks. We monitored both pH and total alkalinity in the equilibration reservoirs over a period of one year in order to document the long-term performance of this system for simulating the future carbonate chemistry of seawater in a coastal laboratory. System performance was sufficient to maintain three contrasting (e.g., 397, 709 and 1032 matm) and relatively constant (the coefficient of variability was 11 %, 9 % and 9 % respectively) seawater pCO(2) during a year-long monitoring.  
  Address [Torres, Rodrigo] CIEP, Coyhaique, Chile, Email: rtorres@ciep.cl  
  Corporate Author Thesis  
  Publisher Soc Biolgia Chile Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0716-078x ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000332750700006 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 359  
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