Thermal adaptation and physiological responses to environmental stress in tunicates

IF 1.3 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Aquatic Biology Pub Date : 2017-11-02 DOI:10.3354/AB00685

V. Montalto, R. Bagarella, A. Rinaldi, G. Sarà, S. Mirto

{"title":"Thermal adaptation and physiological responses to environmental stress in tunicates","authors":"V. Montalto, R. Bagarella, A. Rinaldi, G. Sarà, S. Mirto","doi":"10.3354/AB00685","DOIUrl":null,"url":null,"abstract":"Understanding the multifaceted nature of environmental fluctuations is crucial to predicting the physiological adjustments utilised by organisms in resisting or adapting to changes over time. Here we investigate the effects of 2 environmental stressors on tunicates, whose fitness can have important repercussions on the quality of habitat. Specifically, we report respiration rate (RR), clearance rate (CR), and assimilation efficiency (AE) of the ascidian Styela plicata in response to a range of temperatures and varying food availability. Temperature-dependent RR was observed only within a portion of the thermal window of the species. Significant differences in clearance rates were detected among organisms fed with varying algal concentrations, while no significant influence of food concentrations on AE was observed. This plasticity of the physiological rates and the development of ubiquitous mechanisms such as temperature-insensitive aerobic metabolism suggest a competitive advantage of this group. Such knowledge may allow for more accurate predictions of the physiological and evolutionary mechanisms driving current and future distribution of this species.","PeriodicalId":8111,"journal":{"name":"Aquatic Biology","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2017-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquatic Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.3354/AB00685","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}

引用次数: 4

Abstract

Understanding the multifaceted nature of environmental fluctuations is crucial to predicting the physiological adjustments utilised by organisms in resisting or adapting to changes over time. Here we investigate the effects of 2 environmental stressors on tunicates, whose fitness can have important repercussions on the quality of habitat. Specifically, we report respiration rate (RR), clearance rate (CR), and assimilation efficiency (AE) of the ascidian Styela plicata in response to a range of temperatures and varying food availability. Temperature-dependent RR was observed only within a portion of the thermal window of the species. Significant differences in clearance rates were detected among organisms fed with varying algal concentrations, while no significant influence of food concentrations on AE was observed. This plasticity of the physiological rates and the development of ubiquitous mechanisms such as temperature-insensitive aerobic metabolism suggest a competitive advantage of this group. Such knowledge may allow for more accurate predictions of the physiological and evolutionary mechanisms driving current and future distribution of this species.

查看原文本刊更多论文

被囊动物的热适应和对环境胁迫的生理反应

了解环境波动的多面性对于预测生物体在抵抗或适应变化时所利用的生理调节至关重要。本文研究了两种环境压力对被囊动物的影响，它们的适合度对栖息地质量有重要影响。具体地说，我们报告了海鞘的呼吸速率(RR)、清除率(CR)和同化效率(AE)对一系列温度和不同食物供应的响应。温度相关的RR仅在该物种的一部分热窗内观察到。不同藻类浓度的食物对AE的清除率存在显著差异，而食物浓度对AE的影响不显著。这种生理速率的可塑性和普遍存在的机制的发展，如温度不敏感的有氧代谢，表明这一群体具有竞争优势。这些知识可以让我们更准确地预测驱动该物种当前和未来分布的生理和进化机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Aquatic Biology 生物-海洋与淡水生物学

CiteScore

2.70

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： AB publishes rigorously refereed and carefully selected Feature Articles, Research Articles, Reviews and Notes, as well as Comments/Reply Comments (for details see MEPS 228:1), Theme Sections, Opinion Pieces (previously called ''As I See It'') (for details consult the Guidelines for Authors) concerned with the biology, physiology, biochemistry and genetics (including the ’omics‘) of all aquatic organisms under laboratory and field conditions, and at all levels of organisation and investigation. Areas covered include: -Biological aspects of biota: Evolution and speciation; life histories; biodiversity, biogeography and phylogeography; population genetics; biological connectedness between marine and freshwater biota; paleobiology of aquatic environments; invasive species. -Biochemical and physiological aspects of aquatic life; synthesis and conversion of organic matter (mechanisms of auto- and heterotrophy, digestion, respiration, nutrition); thermo-, ion, osmo- and volume-regulation; stress and stress resistance; metabolism and energy budgets; non-genetic and genetic adaptation. -Species interactions: Environment–organism and organism–organism interrelationships; predation: defenses (physical and chemical); symbioses. -Molecular biology of aquatic life. -Behavior: Orientation in space and time; migrations; feeding and reproductive behavior; agonistic behavior. -Toxicology and water-quality effects on organisms; anthropogenic impacts on aquatic biota (e.g. pollution, fisheries); stream regulation and restoration. -Theoretical biology: mathematical modelling of biological processes and species interactions. -Methodology and equipment employed in aquatic biological research; underwater exploration and experimentation. -Exploitation of aquatic biota: Fisheries; cultivation of aquatic organisms: use, management, protection and conservation of living aquatic resources. -Reproduction and development in marine, brackish and freshwater organisms