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Tripp A, Allen GJP, Quijada-Rodriguez AR, Yoon GR, Weihrauch D. Effects of single and dual-stressor elevation of environmental temperature and P CO2 on metabolism and acid-base regulation in the Louisiana red swamp crayfish, Procambarus clarkii. Comp Biochem Physiol A Mol Integr Physiol 2022; 266:111151. [PMID: 35026389 DOI: 10.1016/j.cbpa.2022.111151] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 12/01/2022]
Abstract
Elevation of temperature and CO2 levels within the world's aquatic environments is expected to cause numerous physiological challenges to their inhabitants. While effects on marine ecosystems have been well studied, freshwater ecosystems have rarely been examined using a dual-stressor approach leaving our understanding of its inhabitants upon these challenges unclear. We aimed to identify the affects of elevated temperature and hypercapnia in isolation and in combination on the metabolic and acid-base regulatory processes of a freshwater crayfish, Procambarus clarkii. Crayfish were exposed to freshwater conditions that may be prevalent by the year 2100 and metabolic responses were determined after 14-days of exposure. In addition, changes in branchial mRNA expression of acid-base linked transporters were investigated. Interactions between exposure conditions influenced extracellular pH as well as the nitrogen physiology and routine metabolic rate of the crayfish. Crayfish exposed to individual and combined elevations in temperature and/or hypercapnia maintained an extracellular pH similar to that of control crayfish. Dual-stressor exposed crayfish seem to elevate the importance of ammonium as an excretable acid-equivalent based on an overall increase in the branchial mRNA expression of transporters related to ammonia excretion including the Na+/K+-ATPase, Rhesus-protein, and the V-type H+-ATPase. Overall, hypercapnia and dual-stressor conditions caused a metabolic depression that may have long-lasting consequences such as limited locomotion, growth, and reproduction. Future generations of crayfish given the chance to adapt over several generations may ameliorate these consequences.
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Affiliation(s)
- Ashley Tripp
- Department of Biological Sciences, University of Manitoba, Winnipeg R3T 2N2, Canada
| | - Garett J P Allen
- Department of Biological Sciences, University of Manitoba, Winnipeg R3T 2N2, Canada
| | | | - Gwangseok R Yoon
- Department of Biological Sciences, University of Manitoba, Winnipeg R3T 2N2, Canada
| | - Dirk Weihrauch
- Department of Biological Sciences, University of Manitoba, Winnipeg R3T 2N2, Canada.
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Haley JA, Hampton D, Marder E. Two central pattern generators from the crab, Cancer borealis, respond robustly and differentially to extreme extracellular pH. eLife 2018; 7:41877. [PMID: 30592258 PMCID: PMC6328273 DOI: 10.7554/elife.41877] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 12/25/2018] [Indexed: 12/18/2022] Open
Abstract
The activity of neuronal circuits depends on the properties of the constituent neurons and their underlying synaptic and intrinsic currents. We describe the effects of extreme changes in extracellular pH – from pH 5.5 to 10.4 – on two central pattern generating networks, the stomatogastric and cardiac ganglia of the crab, Cancer borealis. Given that the physiological properties of ion channels are known to be sensitive to pH within the range tested, it is surprising that these rhythms generally remained robust from pH 6.1 to pH 8.8. The pH sensitivity of these rhythms was highly variable between animals and, unexpectedly, between ganglia. Animal-to-animal variability was likely a consequence of similar network performance arising from variable sets of underlying conductances. Together, these results illustrate the potential difficulty in generalizing the effects of environmental perturbation across circuits, even within the same animal.
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Affiliation(s)
- Jessica A Haley
- Volen Center and Biology Department, Brandeis University, Waltham, United States
| | - David Hampton
- Volen Center and Biology Department, Brandeis University, Waltham, United States
| | - Eve Marder
- Volen Center and Biology Department, Brandeis University, Waltham, United States
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Rastrick SPS, Calosi P, Calder-Potts R, Foggo A, Nightingale G, Widdicombe S, Spicer JI. Living in warmer, more acidic oceans retards physiological recovery from tidal emersion in the velvet swimming crab, Necora puber. J Exp Biol 2014; 217:2499-508. [PMID: 24803457 DOI: 10.1242/jeb.089011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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 μatm/10°C, 1000 μatm/10°C, 400 μatm/15°C or 1000 μatm/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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Affiliation(s)
- S P S Rastrick
- Marine Biology & Ecology Research Centre, School of Marine Science and Engineering, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - P Calosi
- Marine Biology & Ecology Research Centre, School of Marine Science and Engineering, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - R Calder-Potts
- Plymouth Marine Laboratory, Prospect Place, West Hoe, Plymouth PL1 3DH, UK
| | - A Foggo
- Marine Biology & Ecology Research Centre, School of Marine Science and Engineering, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - G Nightingale
- Marine Biology & Ecology Research Centre, School of Marine Science and Engineering, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - S Widdicombe
- Plymouth Marine Laboratory, Prospect Place, West Hoe, Plymouth PL1 3DH, UK
| | - J I Spicer
- Marine Biology & Ecology Research Centre, School of Marine Science and Engineering, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK
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Qadri SA, Camacho J, Wang H, Taylor JR, Grosell M, Worden MK. Temperature and acid-base balance in the American lobster Homarus americanus. ACTA ACUST UNITED AC 2007; 210:1245-54. [PMID: 17371923 DOI: 10.1242/jeb.02709] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Lobsters (Homarus americanus) in the wild inhabit ocean waters where temperature can vary over a broad range (0-25 degrees C). To examine how environmental thermal variability might affect lobster physiology, we examine the effects of temperature and thermal change on the acid-base status of the lobster hemolymph. Total CO(2), pH, P(CO)2 and HCO(-)(3) were measured in hemolymph sampled from lobsters acclimated to temperature in the laboratory as well as from lobsters acclimated to seasonal temperatures in the wild. Our results demonstrate that the change in hemolymph pH as a function of temperature follows the rule of constant relative alkalinity in lobsters acclimated to temperature over a period of weeks. However, thermal change can alter lobster acid-base status over a time course of minutes. Acute increases in temperature trigger a respiratory compensated metabolic acidosis of the hemolymph. Both the strength and frequency of the lobster heartbeat in vitro are modulated by changes in pH within the physiological range measured in vivo. These observations suggest that changes in acid-base status triggered by thermal variations in the environment might modulate lobster cardiac performance in vivo.
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Affiliation(s)
- Syed Aman Qadri
- Department of Neuroscience, University of Virginia, Charlottesville, VA 22908, USA
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De Wachter B, McMahon BR. Temperature effects on heart performance and regional hemolymph flow in the crab Cancer magister. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0300-9629(95)02084-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Whiteley NM, AL‐Wassia AH, Taylor EW. The effect of temperature, aerial exposure and disturbance on oxygen consumption in the lobster,Homarus gammarus(L.). ACTA ACUST UNITED AC 1990. [DOI: 10.1080/10236249009378772] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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The acid-base consequences of aerial exposure in the lobster, Homarus gammarus (L.) at 10 and 20°C. J Therm Biol 1990. [DOI: 10.1016/0306-4565(90)90047-l] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Harrison JM. Temperature effects on intra- and extracellular acid-base status in the American locust,Schistocerca nitens. J Comp Physiol B 1989. [DOI: 10.1007/bf00693015] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Henry RP. Subcellular distribution of carbonic anhydrase activity in the gills of the blue crab,Callinectes sapidus. ACTA ACUST UNITED AC 1988. [DOI: 10.1002/jez.1402450102] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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McMahon BR, Burnett LE, de Fur PL. Carbon dioxide excretion and carbonic anhydrase function in the Red Rock CrabCancer productus. J Comp Physiol B 1984. [DOI: 10.1007/bf00684444] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Burnett LE, Johansen K. The role of branchial ventilation in hemolymph acid-base changes in the shore crabCarcinus maenas during hypoxia. J Comp Physiol B 1981. [DOI: 10.1007/bf01101471] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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McMahon BR, Burggren WW. Acid-base balance following temperature acclimation in land crabs. ACTA ACUST UNITED AC 1981. [DOI: 10.1002/jez.1402180106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Defur PL, Wilkes PR, McMahon BR. Non-equilibrium acid-base status in C. productus: role of exoskeletal carbonate buffers. RESPIRATION PHYSIOLOGY 1980; 42:247-61. [PMID: 6784208 DOI: 10.1016/0034-5687(80)90118-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Hemolymph acid-base variables (pH, PCO2 and CCO2), hemolymph Ca2+ and Na+ concentrations, and osmolality were measured in unrestrained crabs, Cancer productus, before, during and following 4 hr emersion and 43 hr hyperoxia (460-510 Torr), both at 10 degrees C. Emersion and hyperoxia provoked an acidosis associated with elevation of hemolymph CCO2 and PCO2, yet attempts to calculate PCO2 from measured pH and CCO2 always resulted in values greater than those measured directly. This discrepancy between measured and calculated PCO2, was associated with base excess, and was eliminated upon in vitro equilibration of the hemolymph and more slowly in vivo, suggesting that metabolic compensation for the acidosis occurred more rapidly than could acid-base equilibration. During emersion, increases of CCO2 and [Ca2+] provide evidence that the internal CaCO3 stores, possibly from the exoskeleton, were mobilized during acid-base compensation. Hyperoxia provoked no such increase in Ca2+, and branchial uptake of HCO3- may make a major contribution to the elevation of CCO2 during hyperoxia. It is suggested that shell buffering by aquatic crustaceans provides a means of compensation for acidosis under conditions during which branchial function is impaired.
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Truchot JP. Mechanisms of the compensation of blood respiratory acid-base disturbances in the shore crab,Carcinus maenas (L.). ACTA ACUST UNITED AC 1979. [DOI: 10.1002/jez.1402100305] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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