Megan E. Maloney, Katherine M. Buckley, Marie E. Strader
{"title":"附肢色素和温度适应与倒挂水母(Cassiopea xamachana)急性热应激期间的存活率有关","authors":"Megan E. Maloney, Katherine M. Buckley, Marie E. Strader","doi":"10.3389/fevo.2024.1409379","DOIUrl":null,"url":null,"abstract":"IntroductionUpside-down jellyfish (<jats:italic>Cassiopea</jats:italic> sp.) are highly tolerant to multiple abiotic stressors, including fluctuating temperatures associated with shallow marine habitats. This resilience may underlie the ability of <jats:italic>Cassiopea</jats:italic> sp. to inhabit a wide variety of tropical habitats across the globe. Additionally, <jats:italic>Cassiopea</jats:italic> sp. are marked by a conspicuous array of appendage coloration; individual medusae vary in the hue and number of oral appendages, which are often strikingly blue. The function of this coloration is not understood. We aimed to understand how extrinsic (temperature, location) and intrinsic (host color) factors may shape thermal tolerance.MethodsAdult <jats:italic>Cassiopea xamachana</jats:italic> were collected from two sites that vary in daily temperature range within the Florida Keys and were subjected to acute lethal heat stress. To quantify a whole-organism response to heat, we measured changes in bell pulsation, which likely plays a role in feeding, oxygen exchange, and symbiont uptake. Finally, color morphs were acclimated at either ambient (26°C) or elevated (33°C) temperatures.Results<jats:italic>C. xamachana</jats:italic> from two locations that vary in thermal range do not exhibit different responses to heat, suggesting that temperature fluctuations do not prime individuals for higher thermal tolerance. Additionally, <jats:italic>C. xamachana</jats:italic> with blue appendages survived significantly higher temperatures and exhibited less change in bell pulsation rates compared to non-blue individuals. We found that acclimation at 33°C, as well as appendage color in each treatment, led to higher survival under acute heat stress.DiscussionThese findings highlight the importance of temperature and coloration in <jats:italic>Cassiopea xamachana</jats:italic> resilience during heat stress.","PeriodicalId":12367,"journal":{"name":"Frontiers in Ecology and Evolution","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Appendage pigmentation and temperature acclimation correlate with survival during acute heat stress in the upside-down jellyfish, Cassiopea xamachana\",\"authors\":\"Megan E. Maloney, Katherine M. Buckley, Marie E. Strader\",\"doi\":\"10.3389/fevo.2024.1409379\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"IntroductionUpside-down jellyfish (<jats:italic>Cassiopea</jats:italic> sp.) are highly tolerant to multiple abiotic stressors, including fluctuating temperatures associated with shallow marine habitats. This resilience may underlie the ability of <jats:italic>Cassiopea</jats:italic> sp. to inhabit a wide variety of tropical habitats across the globe. Additionally, <jats:italic>Cassiopea</jats:italic> sp. are marked by a conspicuous array of appendage coloration; individual medusae vary in the hue and number of oral appendages, which are often strikingly blue. The function of this coloration is not understood. We aimed to understand how extrinsic (temperature, location) and intrinsic (host color) factors may shape thermal tolerance.MethodsAdult <jats:italic>Cassiopea xamachana</jats:italic> were collected from two sites that vary in daily temperature range within the Florida Keys and were subjected to acute lethal heat stress. To quantify a whole-organism response to heat, we measured changes in bell pulsation, which likely plays a role in feeding, oxygen exchange, and symbiont uptake. Finally, color morphs were acclimated at either ambient (26°C) or elevated (33°C) temperatures.Results<jats:italic>C. xamachana</jats:italic> from two locations that vary in thermal range do not exhibit different responses to heat, suggesting that temperature fluctuations do not prime individuals for higher thermal tolerance. 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We found that acclimation at 33°C, as well as appendage color in each treatment, led to higher survival under acute heat stress.DiscussionThese findings highlight the importance of temperature and coloration in <jats:italic>Cassiopea xamachana</jats:italic> resilience during heat stress.\",\"PeriodicalId\":12367,\"journal\":{\"name\":\"Frontiers in Ecology and Evolution\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2024-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Frontiers in Ecology and Evolution\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.3389/fevo.2024.1409379\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Frontiers in Ecology and Evolution","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.3389/fevo.2024.1409379","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}
引用次数: 0
摘要
导言倒挂水母(Cassiopea sp.)对多种非生物压力具有很强的耐受性,包括与浅海栖息地相关的温度波动。这种恢复能力可能是 Cassiopea sp.能够栖息于全球各种热带栖息地的原因。此外,Cassiopea sp.还具有一系列明显的附肢着色;个体髓质的色调和口腔附肢的数量各不相同,通常呈醒目的蓝色。这种着色的功能尚不清楚。我们的目的是了解外在因素(温度、地点)和内在因素(宿主颜色)如何影响热耐受性。方法从佛罗里达礁岛群内两个日温差不同的地点采集成年Cassiopea xamachana,并对其进行急性致命热胁迫。为了量化整个有机体对热的反应,我们测量了铃铛脉动的变化,这种脉动可能在摄食、氧气交换和共生体吸收中发挥作用。最后,在环境温度(26°C)或较高温度(33°C)下对颜色形态进行了适应性试验。结果来自两个热范围不同地点的 C. xamachana 对热的反应并无不同,这表明温度波动并不会使个体具有更强的耐热性。此外,与非蓝色个体相比,蓝色附肢的 C. xamachana 能在更高的温度下存活,其铃铛脉动率的变化也更小。我们发现,在急性热胁迫下,在33°C条件下的适应以及各处理中的附肢颜色都能提高存活率。
Appendage pigmentation and temperature acclimation correlate with survival during acute heat stress in the upside-down jellyfish, Cassiopea xamachana
IntroductionUpside-down jellyfish (Cassiopea sp.) are highly tolerant to multiple abiotic stressors, including fluctuating temperatures associated with shallow marine habitats. This resilience may underlie the ability of Cassiopea sp. to inhabit a wide variety of tropical habitats across the globe. Additionally, Cassiopea sp. are marked by a conspicuous array of appendage coloration; individual medusae vary in the hue and number of oral appendages, which are often strikingly blue. The function of this coloration is not understood. We aimed to understand how extrinsic (temperature, location) and intrinsic (host color) factors may shape thermal tolerance.MethodsAdult Cassiopea xamachana were collected from two sites that vary in daily temperature range within the Florida Keys and were subjected to acute lethal heat stress. To quantify a whole-organism response to heat, we measured changes in bell pulsation, which likely plays a role in feeding, oxygen exchange, and symbiont uptake. Finally, color morphs were acclimated at either ambient (26°C) or elevated (33°C) temperatures.ResultsC. xamachana from two locations that vary in thermal range do not exhibit different responses to heat, suggesting that temperature fluctuations do not prime individuals for higher thermal tolerance. Additionally, C. xamachana with blue appendages survived significantly higher temperatures and exhibited less change in bell pulsation rates compared to non-blue individuals. We found that acclimation at 33°C, as well as appendage color in each treatment, led to higher survival under acute heat stress.DiscussionThese findings highlight the importance of temperature and coloration in Cassiopea xamachana resilience during heat stress.
期刊介绍:
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