Lower hypoxia thresholds of cuttlefish early life stages living in a warm acidified ocean

Proceedings of the Royal Society B: Biological Sciences - Tập 280 Số 1768 - Trang 20131695 - 2013
Rui Rosa1, Katja Trübenbach1, Tiago Repolho1, Marta S. Pimentel1, Filipa Faleiro1, Joana Boavida-Portugal2,1, Miguel Baptista1, Vanessa M. Lopes1, Gisela Dionísio3,1, Miguel C. Leal3,4, Ricardo Calado3, Hans‐Otto Pörtner5
1Laboratório Marítimo da Guia, Centro de Oceanografia, Faculdade de Ciências da Universidade de Lisboa, Av. Nossa Senhora do Cabo, 939, 2750-374 Cascais, Portugal
2Cátedra Rui Nabeiro-Biodiversidade, CIBIO, Universidade de Évora, 7004-516 Évora, Portugal
3Departamento de Biologia and CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
4Skidaway Institute of Oceanography, 10 Ocean Science Circle, Savannah, GA, 31411 USA
5Alfred Wegener Institute for Polar and Marine Research, Animal Ecophysiology, Postfach 120161, 27515 Bremerhaven, Germany

Tóm tắt

The combined effects of future ocean acidification and global warming on the hypoxia thresholds of marine biota are, to date, poorly known. Here, we show that the future warming and acidification scenario led to shorter embryonic periods, lower survival rates and the enhancement of premature hatching in the cuttlefishSepia officinalis. Routine metabolic rates increased during the embryonic period, but environmental hypercapnia significantly depressed pre-hatchling's energy expenditures rates (independently of temperature). During embryogenesis, there was also a significant rise in the carbon dioxide partial pressure in the perivitelline fluid (PVF), bicarbonate levels, as well as a drop in pH and oxygen partial pressure (pO2). The critical partial pressure (i.e. hypoxic threshold) of the pre-hatchlings was significantly higher than the PVF oxygen partial pressure at the warmer and hypercapnic condition. Thus, the record of oxygen tensions below criticalpO2in such climate scenario indicates that the already harsh conditions inside the egg capsules are expected to be magnified in the years to come, especially in populations at the border of their thermal envelope. Such a scenario promotes untimely hatching and smaller post-hatching body sizes, thus challenging the survival and fitness of early life stages.

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Tài liệu tham khảo

Meehl GA, 2007, Climate change 2007: the physical science basis, 686

10.1073/pnas.0806886105

10.1371/journal.pone.0038282

10.1126/science.1135471

10.1126/science.1163156

10.1242/jeb.037473

10.1016/S1095-6433(02)00045-4

10.1086/316738

10.1146/annurev.ecolsys.37.091305.110149

10.1038/20859

10.1038/nature04095

10.1093/icesjms/fsn048

10.1126/science.1065301

10.1007/s10872-004-5763-0

10.1111/j.1461-0248.2010.01518.x

10.1126/science.1156401

10.1038/nature02605

10.1126/science.1149016

10.1073/pnas.0803833105

10.5194/bg-6-2063-2009

Naef A, 1928, Die cephalopoden, Fauna et Flora di Golfo del Napoli Monographia, 35, 186

10.1016/S0278-4343(97)00014-9

10.1016/S0924-7963(98)00022-0

10.1016/S0043-1354(98)00168-7

Dickson A, 2007, Guide to best practices for ocean CO2 measurements, PICES Spec. Publ., 3, 191

Lewis E& Wallace DWR. 1998 CO2SYS-Program developed for the CO 2 system calculations. Carbon Dioxide Inf Anal Center Report ORNL/CDIAC-105.

10.4319/lo.1973.18.6.0897

10.1016/0198-0149(87)90021-5

10.1093/icb/icm089

10.1086/591950

Rosa R, 2010, Voyage of the argonauts in the pelagic realm: physiological and behavioural ecology of the rare paper nautilus, Argonauta nouryi, ICES J. Mar. Sci., 67, 1494, 10.1093/icesjms/fsq026

10.1007/s002270000274

10.3354/meps224171

10.1098/rspb.2010.1414

10.1017/S0006323198005258

10.1007/s00227-008-1096-7

10.1146/annurev.es.16.110185.002011

10.1038/362626a0

Pörtner HO, 1993, The vertebrate gas transport cascade: adaptations to environment and mode of life, 330

Storey KB, 2004, Functional metabolism regulation and adaptation, 415, 10.1002/047167558X

Hochachka PW, 2002, Biochemical adaptation: mechanisms and process in physiological evolution, 10.1093/oso/9780195117028.001.0001

10.1007/s11160-007-9070-x

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Proceedings of the Royal Society B: Biological Sciences

Tập 280 Số 1768

20131695

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