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Living in warmer, more acidic oceans retards physiological recovery from tidal emersion in the velvet swimming crab, Necora puber

Living in warmer, more acidic oceans retards physiological recovery from tidal emersion in the velvet swimming crab, Necora puber
Living in warmer, more acidic oceans retards physiological recovery from tidal emersion in the velvet swimming crab, Necora puber
The distribution patterns of many species in the intertidal zone are partly determined by their ability to survive and recover from tidal emersion. During emersion, most crustaceans experience gill collapse, impairing gas exchange. Such collapse generates a state of hypoxemia and a hypercapnia-induced respiratory acidosis, leading to hyperlactaemia and metabolic acidosis. However, how such physiological responses to emersion are modified by prior exposure to elevated CO2 and temperature combinations, indicative of future climate change scenarios, is not known. We therefore investigated key physiological responses of velvet swimming crabs, Necora puber, kept for 14 days at one of four pCO2/temperature treatments (400 ?atm/10°C, 1000 ?atm/10°C, 400 ?atm/15°C or 1000 ?atm/15°C) to experimental emersion and recovery. Pre-exposure to elevated pCO2 and temperature increased pre-emersion bicarbonate ion concentrations [HCO3?], increasing resistance to short periods of emersion (90 min). However, there was still a significant acidosis following 180 min emersion in all treatments. The recovery of extracellular acid–base via the removal of extracellular pCO2 and lactate after emersion was significantly retarded by exposure to both elevated temperature and pCO2. If elevated environmental pCO2 and temperature lead to slower recovery after emersion, then some predominantly subtidal species that also inhabit the low to mid shore, such as N. puber, may have a reduced physiological capacity to retain their presence in the low intertidal zone, ultimately affecting their bathymetric range of distribution, as well as the structure and diversity of intertidal assemblages.
Climate change, Ocean acidification, OA, Crustacea, Acid–base balance, Lactate
0022-0949
2499-2508
Rastrick, S.P.S.
62b436ef-1b93-41ba-b7d1-80c2ce0bc467
Calosi, P.
35797083-5a1b-4685-b4d1-508ee7aa6f16
Calder-Potts, R.
442c1653-477e-43b6-853c-36b025ec23b6
Foggo, A.
c1f8d0fc-fb49-41b0-82ec-ec9ee16352b3
Nightingale, G.
8114dfb4-2165-4bbc-93c0-ada8571108f7
Widdicombe, S.
e8c8e515-277a-49c5-a0f7-7a0745b1746f
Spicer, J.I.
606ea53b-663b-4f89-b6a1-11e9dd40ce2f
Rastrick, S.P.S.
62b436ef-1b93-41ba-b7d1-80c2ce0bc467
Calosi, P.
35797083-5a1b-4685-b4d1-508ee7aa6f16
Calder-Potts, R.
442c1653-477e-43b6-853c-36b025ec23b6
Foggo, A.
c1f8d0fc-fb49-41b0-82ec-ec9ee16352b3
Nightingale, G.
8114dfb4-2165-4bbc-93c0-ada8571108f7
Widdicombe, S.
e8c8e515-277a-49c5-a0f7-7a0745b1746f
Spicer, J.I.
606ea53b-663b-4f89-b6a1-11e9dd40ce2f

Rastrick, S.P.S., Calosi, P., Calder-Potts, R., Foggo, A., Nightingale, G., Widdicombe, S. and Spicer, J.I. (2014) Living in warmer, more acidic oceans retards physiological recovery from tidal emersion in the velvet swimming crab, Necora puber. Journal of Experimental Biology, 217 (14), 2499-2508. (doi:10.1242/?jeb.089011).

Record type: Article

Abstract

The distribution patterns of many species in the intertidal zone are partly determined by their ability to survive and recover from tidal emersion. During emersion, most crustaceans experience gill collapse, impairing gas exchange. Such collapse generates a state of hypoxemia and a hypercapnia-induced respiratory acidosis, leading to hyperlactaemia and metabolic acidosis. However, how such physiological responses to emersion are modified by prior exposure to elevated CO2 and temperature combinations, indicative of future climate change scenarios, is not known. We therefore investigated key physiological responses of velvet swimming crabs, Necora puber, kept for 14 days at one of four pCO2/temperature treatments (400 ?atm/10°C, 1000 ?atm/10°C, 400 ?atm/15°C or 1000 ?atm/15°C) to experimental emersion and recovery. Pre-exposure to elevated pCO2 and temperature increased pre-emersion bicarbonate ion concentrations [HCO3?], increasing resistance to short periods of emersion (90 min). However, there was still a significant acidosis following 180 min emersion in all treatments. The recovery of extracellular acid–base via the removal of extracellular pCO2 and lactate after emersion was significantly retarded by exposure to both elevated temperature and pCO2. If elevated environmental pCO2 and temperature lead to slower recovery after emersion, then some predominantly subtidal species that also inhabit the low to mid shore, such as N. puber, may have a reduced physiological capacity to retain their presence in the low intertidal zone, ultimately affecting their bathymetric range of distribution, as well as the structure and diversity of intertidal assemblages.

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More information

Published date: 15 July 2014
Keywords: Climate change, Ocean acidification, OA, Crustacea, Acid–base balance, Lactate
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 368495
URI: http://eprints.soton.ac.uk/id/eprint/368495
ISSN: 0022-0949
PURE UUID: 9384a545-7de5-4e64-9c86-415e4f9e254c

Catalogue record

Date deposited: 01 Sep 2014 12:39
Last modified: 15 Jul 2019 21:46

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