{"refrec":{"BRefID":39123,"RR":"<b>Lahdes, E.O.; Vainio, L.A.</b> (2003). Effect of season on the acute thermal tolerance and thermal inactivation of membrane (Mg<sup>2+</sup> + Na<sup>+</sup> + K<sup>+</sup>)- and Mg<sup>2+</sup>-adenosine triphosphatase activity of the Baltic Sea amphipods, <i>Monoporeia affinis</i> and <i>Gammarus</i> spp. <i>Boreal Env. Res. 8(2)</i>: 147-157","BEntID":39123,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":" <i>Boreal Env. Res. 8(2)</i>: 147-157","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lahdes, E.O.; Vainio, L.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lahdes, E.O.; Vainio, L.A.","Englishabstract":"This paper presents a study of the acute upper thermal tolerance and thermal inactivation (IA50) of the membrane-bound (Mg<sup>2+</sup> + Na<sup>+</sup> + K<sup>+</sup>)- and Mg<sup>2+</sup>-adenosine triphosphatases of the Baltic amphipods,<i> Monoporeia affinis</i>, inhabiting a stable cold environment (ca. 3.5 °C), and <i>Gammarus</i> spp., living in annually fluctuating temperatures (0-20 °C). For <i>M. affinis</i> the lethal temperatures (LT50) in a continuously rising temperature were 29.8 °C in winter, 29.5 °C in spring and 30.2 °C in summer. For <i>Gammarus</i> spp. the LT50 was 31.0 °C in spring, 32.8 °C in summer and 30.2 °C in autumn. Seasonality in the LT50 values was observed in <i>Gammarus</i> spp., but in<i> M. affinis</i> only the summer value differed from the other seasons. The LT50 of <i>M. affinis</i> did not change after temperature acclimation of the animals at 13.5 °C. The thermal inactivation values (IA50) of the ATPases of <i>M. affinis</i> (44.3-47.4 °C) were higher than those of <i>Gammarus</i> spp. (40.3-45.2 °C). In <i>Gammarus</i> differences in the IA50 values between the seasons were found while in <i>M. affinis</i> only between spring and summer.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Effect of season on the acute thermal tolerance and thermal inactivation of membrane (Mg<sup>2+</sup> + Na<sup>+</sup> + K<sup>+</sup>)- and Mg<sup>2+</sup>-adenosine triphosphatase activity of the Baltic Sea amphipods, <i>Monoporeia affinis</i> and <i>Gammarus</i> spp.","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2003-09-12","DateCreate":"2003-09-08","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000221372200005","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":39123,"PubliDate":2003,"Pagination":"147-157","XtraPublOfAnaID":null,"ISBN":null,"Volume":"8","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42289,"SerRR":"Boreal Environment Research. 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