1
|
Turriago JL, Tejedo M, Hoyos JM, Camacho A, Bernal MH. The time course of acclimation of critical thermal maxima is modulated by the magnitude of temperature change and thermal daily fluctuations. J Therm Biol 2023; 114:103545. [PMID: 37290261 DOI: 10.1016/j.jtherbio.2023.103545] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/09/2023] [Accepted: 03/12/2023] [Indexed: 06/10/2023]
Abstract
Plasticity in the critical thermal maximum (CTmax) helps ectotherms survive in variable thermal conditions. Yet, little is known about the environmental mechanisms modulating its time course. We used the larvae of three neotropical anurans (Boana platanera, Engystomops pustulosus and Rhinella horribilis) to test whether the magnitude of temperature changes and the existence of fluctuations in the thermal environment affected both the amount of change in CTmax and its acclimation rate (i.e., its time course). For that, we transferred tadpoles from a pre-treatment temperature (23 °C, constant) to two different water temperatures: mean (28 °C) and hot (33 °C), crossed with constant and daily fluctuating thermal regimes, and recorded CTmax values, daily during six days. We modeled changes in CTmax as an asymptotic function of time, temperature, and the daily thermal fluctuation. The fitted function provided the asymptotic CTmax value (CTmax∞) and CTmax acclimation rate (k). Tadpoles achieved their CTmax∞ between one and three days. Transferring tadpoles to the hot treatment generated higher CTmax∞ at earlier times, inducing faster acclimation rates in tadpoles. In contrast, thermal fluctuations equally led to higher CTmax∞ values but tadpoles required longer times to achieve CTmax∞ (i.e., slower acclimation rates). These thermal treatments interacted differently with the studied species. In general, the thermal generalist Rhinella horribilis showed the most plastic acclimation rates whereas the ephemeral-pond breeder Engystomops pustulosus, more exposed to heat peaks during larval development, showed less plastic (i.e., canalized) acclimation rates. Further comparative studies of the time course of CTmax acclimation should help to disentangle the complex interplay between the thermal environment and species ecology, to understand how tadpoles acclimate to heat stress.
Collapse
Affiliation(s)
- Jorge L Turriago
- Grupo de Herpetología, Eco-Fisiología & Etología, Department of Biology, Universidad del Tolima, Tolima, 730006299, Colombia; Programa Doctorado en Ciencias Biológicas, Pontificia Universidad Javeriana, Bogotá, 11001000, Colombia.
| | - Miguel Tejedo
- Department of Evolutionary Ecology, Estación Biológica de Doñana, CSIC, Sevilla, 41092, Spain.
| | - Julio M Hoyos
- Grupo UNESIS, Department of Biology, Pontificia Universidad Javeriana, Bogotá, 11001000, Colombia.
| | - Agustín Camacho
- Department of Evolutionary Ecology, Estación Biológica de Doñana, CSIC, Sevilla, 41092, Spain.
| | - Manuel H Bernal
- Grupo de Herpetología, Eco-Fisiología & Etología, Department of Biology, Universidad del Tolima, Tolima, 730006299, Colombia.
| |
Collapse
|
2
|
Mayvan MM, Greenslade P, Sadeghi-Namaghi H. An annotated checklist of the Collembola (Hexapoda) from Iran. Zootaxa 2023; 5275:1-101. [PMID: 37518100 DOI: 10.11646/zootaxa.5275.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Indexed: 08/01/2023]
Abstract
Based on available literature sources, we have listed the genera and species of springtails (Collembola) of Iran located in Southwest Asia. In total, 301 named species of Collembola are listed in catalogue. This includes 286 described species in 109 genera from 20 families recorded from Iran. Of them, 15 species are also considered as dubious species. It also includes 15 genera whose species are still unknown. Information about biology, geographical distribution, ecology, authorship records for different provinces, and bibliographical data of Iranian Collembola are included.
Collapse
Affiliation(s)
- Mahmood Mehrafrooz Mayvan
- Department of Plant Protection; Faculty of Agriculture; Ferdo wsi University of Mashhad; Mashhad; Razavi Khorasan; Iran.
| | - Penelope Greenslade
- Institute of Biology and Ecology; Faculty of Science; Pavol Jozef Šafárik University in Košice; Košice; Šrobárova 2; 04154 Košice; Slovakia.
| | - Hussein Sadeghi-Namaghi
- School of Science; Psychology and Sport; Federation University; Ballarat; Victoria 3353; Australia; School of Biology; Australian National University; Australian Capital Territory.
| |
Collapse
|
3
|
Chown SL, Janion-Scheepers C, Marshall A, Aitkenhead IJ, Hallas R, Amy Liu WP, Phillips LM. Indigenous and introduced Collembola differ in desiccation resistance but not its plasticity in response to temperature. CURRENT RESEARCH IN INSECT SCIENCE 2022; 3:100051. [PMID: 36591563 PMCID: PMC9800180 DOI: 10.1016/j.cris.2022.100051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Biological invasions have significant ecological and economic impacts. Much attention is therefore focussed on predicting establishment and invasion success. Trait-based approaches are showing much promise, but are mostly restricted to investigations of plants. Although the application of these approaches to animals is growing rapidly, it is rare for arthropods and restricted mostly to investigations of thermal tolerance. Here we study the extent to which desiccation tolerance and its phenotypic plasticity differ between introduced (nine species) and indigenous (seven species) Collembola, specifically testing predictions of the 'ideal weed' and 'phenotypic plasticity' hypotheses of invasion biology. We do so on the F2 generation of adults in a full factorial design across two temperatures, to elicit desiccation responses, for the phenotypic plasticity trials. We also determine whether basal desiccation resistance responds to thermal laboratory natural selection. We first show experimentally that acclimation to different temperatures elicits changes to cuticular structure and function that are typically associated with water balance, justifying our experimental approach. Our main findings reveal that basal desiccation resistance differs, on average, between the indigenous and introduced species, but that this difference is weaker at higher temperatures, and is driven by particular taxa, as revealed by phylogenetic generalised least squares approaches. By contrast, the extent or form of phenotypic plasticity does not differ between the two groups, with a 'hotter is better' response being most common. Beneficial acclimation is characteristic of only a single species. Laboratory natural selection had little influence on desiccation resistance over 8-12 generations, suggesting that environmental filtering rather than adaptation to new environments may be an important factor influencing Collembola invasions.
Collapse
Affiliation(s)
- Steven L Chown
- School of Biological Sciences, Monash University, Victoria 3800, Australia
- Securing Antarctica's Environmental Future, Monash University, Victoria 3800, Australia
| | - Charlene Janion-Scheepers
- Department of Biological Sciences, University of Cape Town, Rondebosch, Cape Town 7700, South Africa
| | - Angus Marshall
- School of Biological Sciences, Monash University, Victoria 3800, Australia
| | - Ian J Aitkenhead
- School of Biological Sciences, Monash University, Victoria 3800, Australia
| | - Rebecca Hallas
- School of Biological Sciences, Monash University, Victoria 3800, Australia
- Securing Antarctica's Environmental Future, Monash University, Victoria 3800, Australia
| | - WP Amy Liu
- School of Biological Sciences, Monash University, Victoria 3800, Australia
| | - Laura M Phillips
- School of Biological Sciences, Monash University, Victoria 3800, Australia
- Securing Antarctica's Environmental Future, Monash University, Victoria 3800, Australia
| |
Collapse
|
4
|
Burton T, Ratikainen II, Einum S. Environmental change and the rate of phenotypic plasticity. GLOBAL CHANGE BIOLOGY 2022; 28:5337-5345. [PMID: 35729070 PMCID: PMC9541213 DOI: 10.1111/gcb.16291] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 04/20/2022] [Indexed: 05/31/2023]
Abstract
With rapid and less predictable environmental change emerging as the 'new norm', understanding how individuals tolerate environmental stress via plastic, often reversible changes to the phenotype (i.e., reversible phenotypic plasticity, RPP), remains a key issue in ecology. Here, we examine the potential for better understanding how organisms overcome environmental challenges within their own lifetimes by scrutinizing a somewhat overlooked aspect of RPP, namely the rate at which it can occur. Although recent advances in the field provide indication of the aspects of environmental change where RPP rates may be of particular ecological relevance, we observe that current theoretical models do not consider the evolutionary potential of the rate of RPP. Whilst recent theory underscores the importance of environmental predictability in determining the slope of the evolved reaction norm for a given trait (i.e., how much plasticity can occur), a hitherto neglected possibility is that the rate of plasticity might be a more dynamic component of this relationship than previously assumed. If the rate of plasticity itself can evolve, as empirical evidence foreshadows, rates of plasticity may have the potential to alter the level predictability in the environment as perceived by the organism and thus influence the slope of the evolved reaction norm. However, optimality in the rate of phenotypic plasticity, its evolutionary dynamics in different environments and influence of constraints imposed by associated costs remain unexplored and may represent fruitful avenues of exploration in future theoretical and empirical treatments of the topic. We conclude by reviewing published studies of RPP rates, providing suggestions for improving the measurement of RPP rates, both in terms of experimental design and in the statistical quantification of this component of plasticity.
Collapse
Affiliation(s)
- Tim Burton
- Centre for Biodiversity Dynamics, Department of BiologyNorwegian University of Science and TechnologyTrondheimNorway
- Norwegian Institute for Nature ResearchTrondheimNorway
| | - Irja Ida Ratikainen
- Centre for Biodiversity Dynamics, Department of BiologyNorwegian University of Science and TechnologyTrondheimNorway
| | - Sigurd Einum
- Centre for Biodiversity Dynamics, Department of BiologyNorwegian University of Science and TechnologyTrondheimNorway
| |
Collapse
|
5
|
Bahrndorff S, Lauritzen JMS, Sørensen MH, Noer NK, Kristensen TN. Responses of terrestrial polar arthropods to high and increasing temperatures. J Exp Biol 2021; 224:238094. [PMID: 34424971 DOI: 10.1242/jeb.230797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Terrestrial arthropods in the Arctic and Antarctic are exposed to extreme and variable temperatures, and climate change is predicted to be especially pronounced in these regions. Available ecophysiological studies on terrestrial ectotherms from the Arctic and Antarctic typically focus on the ability of species to tolerate the extreme low temperatures that can occur in these regions, whereas studies investigating species plasticity and the importance of evolutionary adaptation to periodically high and increasing temperatures are limited. Here, we provide an overview of current knowledge on thermal adaptation to high temperatures of terrestrial arthropods in Arctic and Antarctic regions. Firstly, we summarize the literature on heat tolerance for terrestrial arthropods in these regions, and discuss variation in heat tolerance across species, habitats and polar regions. Secondly, we discuss the potential for species to cope with increasing and more variable temperatures through thermal plasticity and evolutionary adaptation. Thirdly, we summarize our current knowledge of the underlying physiological adjustments to heat stress in arthropods from polar regions. It is clear that very little data are available on the heat tolerance of arthropods in polar regions, but that large variation in arthropod thermal tolerance exists across polar regions, habitats and species. Further, the species investigated show unique physiological adjustments to heat stress, such as their ability to respond quickly to increasing or extreme temperatures. To understand the consequences of climate change on terrestrial arthropods in polar regions, we suggest that more studies on the ability of species to cope with stressful high and variable temperatures are needed.
Collapse
Affiliation(s)
- Simon Bahrndorff
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Jannik M S Lauritzen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Mathias H Sørensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Natasja K Noer
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Torsten N Kristensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark.,Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| |
Collapse
|