1
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Wang Y, Chang Y, Gong W, Du Y. Life Table Study of Liriomyza trifolii and Its Contribution to Thermotolerance: Responding to Long-Term Selection Pressure for Abamectin Resistance. INSECTS 2024; 15:462. [PMID: 38921175 PMCID: PMC11203713 DOI: 10.3390/insects15060462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/13/2024] [Accepted: 06/18/2024] [Indexed: 06/27/2024]
Abstract
Liriomyza trifolii is a significant invasive pest that targets horticultural and vegetable crops, causing large-scale outbreaks characterized by pronounced thermotolerance and insecticide resistance. This study examined the impact of long-term selection for abamectin resistance during the larval stage of L. trifolii on its population dynamics and thermal tolerance. We conducted a comprehensive comparison between the abamectin-resistant strain (AB-R) and the susceptible strain (S), including age-stage, two-sex life table analysis, thermal preference (Tpref), critical thermal maximum (CTmax), heat knockdown times (HKDTs), eclosion and survival rates, and LtHsp expression under heat stress. Our results showed that while selection for abamectin resistance was detrimental to survival and reproduction, it activated self-defense mechanisms and rapid adaptive adjustments and conferred modest thermal tolerance, which suggests a dual nature of insecticide effects. The AB-R strain exhibited significantly higher thermal preference and CTmax values, along with a longer HKDT and improved survival. Additionally, there was a significant upregulation of LtHsp expression in the AB-R strain compared to the S strain. These findings indicate that the evolution of thermal adaptation was accompanied by abamectin resistance development, emphasizing the necessity of considering temperature effects when applying chemical control. Our study provides valuable insights into how physiological acclimation may help mitigate the toxic effects of insecticides and illustrate how insects respond to multiple environmental pressures.
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Affiliation(s)
- Yucheng Wang
- College of Plant Protection, Yangzhou University, Yangzhou 225000, China; (Y.W.); (Y.C.)
| | - Yawen Chang
- College of Plant Protection, Yangzhou University, Yangzhou 225000, China; (Y.W.); (Y.C.)
| | - Weirong Gong
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing 210036, China;
| | - Yuzhou Du
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou 225000, China
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2
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Sakich NB, Bartel PC, Richards MH, Tattersall GJ. Hot crabs with bold choices: temperature has little impact on behavioural repeatability in Caribbean hermit crabs. Behav Processes 2023:104916. [PMID: 37454746 DOI: 10.1016/j.beproc.2023.104916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
An animal's boldness is generally considered to be influenced by genetic and developmental factors. However, abiotic factors such as temperature have profound effects on the physiology of ectothermic animals, and thus can influence the expression and measurement of this behavioural trait. We examined the relationship between temperature and behaviour in the Caribbean hermit crab (Coenobita clypeatus) using field and lab experiments. Crabs captured in the sun were bolder than crabs captured in the shade, even when measured at a common temperature, which led to bold crabs experiencing higher microhabitat temperatures. In laboratory housed conditions, crabs demonstrated highly repeatable boldness behaviours at all temperatures, and as temperature increased, the mean behavioural latencies decreased across all individuals. Bolder crabs do not seem to rely on an innately higher thermal preference, since there was no association between boldness behaviours and thermal preference in the laboratory. Instead, bolder crabs seem to exploit more open, riskier habitats than shyer crabs. Our results highlight the complex interplay between physiological and ecological factors influencing the behaviour of a widespread and ecologically important ectothermic animal.
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Affiliation(s)
- Nicholas B Sakich
- Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
| | - Philip C Bartel
- Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
| | - Miriam H Richards
- Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
| | - Glenn J Tattersall
- Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
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3
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Slein MA, Bernhardt JR, O'Connor MI, Fey SB. Effects of thermal fluctuations on biological processes: a meta-analysis of experiments manipulating thermal variability. Proc Biol Sci 2023; 290:20222225. [PMID: 36750193 PMCID: PMC9904952 DOI: 10.1098/rspb.2022.2225] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Thermal variability is a key driver of ecological processes, affecting organisms and populations across multiple temporal scales. Despite the ubiquity of variation, biologists lack a quantitative synthesis of the observed ecological consequences of thermal variability across a wide range of taxa, phenotypic traits and experimental designs. Here, we conduct a meta-analysis to investigate how properties of organisms, their experienced thermal regime and whether thermal variability is experienced in either the past (prior to an assay) or present (during the assay) affect performance relative to the performance of organisms experiencing constant thermal environments. Our results-which draw upon 1712 effect sizes from 75 studies-indicate that the effects of thermal variability are not unidirectional and become more negative as mean temperature and fluctuation range increase. Exposure to variation in the past decreases performance to a greater extent than variation experienced in the present and increases the costs to performance more than diminishing benefits across a broad set of empirical studies. Further, we identify life-history attributes that predictably modify the ecological response to variation. Our findings demonstrate that effects of thermal variability on performance are context-dependent, yet negative outcomes may be heightened in warmer, more variable climates.
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Affiliation(s)
- Margaret A. Slein
- Department of Biology, Reed College, Portland, OR 97202, USA,Department of Zoology and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | - Joey R. Bernhardt
- Department of Ecology and Evolutionary Biology, Yale University, 165 Prospect Street, New Haven, CT 06520, USA,Yale Institute for Biospheric Studies, PO Box 208118, New Haven, CT 06520, USA,Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Mary I. O'Connor
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | - Samuel B. Fey
- Department of Biology, Reed College, Portland, OR 97202, USA
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4
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Augustin J, Bourgeois G, Brodeur J, Boivin G. Low and high temperatures decrease the mating success of an egg parasitoid and the proportion of females in the population. J Therm Biol 2022; 110:103382. [DOI: 10.1016/j.jtherbio.2022.103382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 04/06/2022] [Accepted: 10/21/2022] [Indexed: 11/21/2022]
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5
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Weldon CW, Terblanche JS, Bosua H, Malod K, Chown SL. Male Mediterranean fruit flies prefer warmer temperatures that improve sexual performance. J Therm Biol 2022; 108:103298. [DOI: 10.1016/j.jtherbio.2022.103298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 05/31/2022] [Accepted: 07/19/2022] [Indexed: 11/26/2022]
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6
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Ji SX, Wang XD, Lin ZK, Wan FH, Lü ZC, Liu WX. Characterization of Chromatin Remodeling Genes Involved in Thermal Tolerance of Biologically Invasive Bemisia tabaci. Front Physiol 2022; 13:865172. [PMID: 35669578 PMCID: PMC9163341 DOI: 10.3389/fphys.2022.865172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 04/13/2022] [Indexed: 11/13/2022] Open
Abstract
As an invasive species, Bemisia tabaci Mediterranean (MED) has notable potential to adapt to a wide range of environmental temperatures, which enables it to successfully spread after invasion and occupy habitats over a wide latitude range. It has been postulated that chromatin remodeling mechanisms are related to the rapid acquisition of adaptive traits and thermal resistance in invasive species; however, relevant experimental evidence is scarce. To identify the molecular characteristics and assess the role of chromatin remodelers in thermal stress within invasive MED and native Asia II 1 of the B. tabaci species complex, we identified 13 switching defective/sucrose non-fermenting (SWI/SNF) and 10 imitation switch (ISWI) family members in the B. tabaci genome, analyzed their molecular characteristics and structures, and identified key mutation sites between MED and Asia II 1, then cloned the catalytic subunits, and revealed the difference in thermal tolerance function. The results showed that the expression levels of Bt-BRM-1 and Bt-BRM-2 were significantly higher in MED than in Asia II 1 during heat stress, and Bt-BRM-2 expression was significantly higher during cold stress. In addition, RNA interference results indicated that the two target genes had similar temperature tolerance function in the both two cryptic species. This study is the first to identify and analyze the molecular characteristics of SWI/SNF and ISWI family members and reveal their potential key roles in temperature tolerance in poikilothermic ectotherms. The results will assist in understanding the underlying temperature adaptation mechanism of invasive insects and will enrich stress adaptation research systems from an epigenetic perspective.
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Affiliation(s)
- Shun-Xia Ji
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiao-Di Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ze-Kai Lin
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Fang-Hao Wan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- Agricultural Genome Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Zhi-Chuang Lü
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- *Correspondence: Zhi-Chuang Lü,
| | - Wan-Xue Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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7
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Wang XD, Lin ZK, Ji SX, Bi SY, Liu WX, Zhang GF, Wan FH, Lü ZC. Molecular Characterization of TRPA Subfamily Genes and Function in Temperature Preference in Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae). Int J Mol Sci 2021; 22:ijms22137157. [PMID: 34281211 PMCID: PMC8268038 DOI: 10.3390/ijms22137157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/20/2021] [Accepted: 06/29/2021] [Indexed: 02/03/2023] Open
Abstract
To reveal the mechanism of temperature preference in Tuta absoluta, one of the top 20 plant pests in the world, we cloned and identified TaTRPA1, TaPain, and TaPyx genes by RACE and bioinformatic analysis, and clarified their expression profiles during different development stages using real-time PCR, and revealed their function in preference temperature by RNAi. The full-length cDNA of TaPain was 3136 bp, with a 2865-bp open reading frame encoding a 259.89-kDa protein; and the partial length cDNA of TaPyx was 2326-bp, with a 2025-bp open reading frame encoding a 193.16-kDa protein. In addition, the expression of TaTRPA1 and TaPyx was significantly lower in larvae than other stages, and it was significantly higher in pupae and newly emerging males for TaPain. After feeding target double-stranded RNA (dsRNA), the preferred temperature decreased 2 °C more than the control group. In conclusion, the results firstly indicated the molecular characterization of TRPA subfamily genes and their key role in temperature perception in T. absoluta, and the study will help us to understand the temperature-sensing mechanism in the pest, and will provide some basis for study of other Lepidoptera insects’ temperature preference. Moreover, it is of great significance in enriching the research progress of “thermos TRP”.
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Affiliation(s)
- Xiao-Di Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Ze-Kai Lin
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Shun-Xia Ji
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Si-Yan Bi
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Wan-Xue Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Gui-Fen Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Fang-Hao Wan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
- Agricultural Genome Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Zhi-Chuang Lü
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
- Correspondence: ; Tel.: +86-10-8210-9572
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8
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Navas CA, Gouveia SF, Solano-Iguarán JJ, Vidal MA, Bacigalupe LD. Amphibian responses in experimental thermal gradients: Concepts and limits for inference. Comp Biochem Physiol B Biochem Mol Biol 2021; 254:110576. [PMID: 33609807 DOI: 10.1016/j.cbpb.2021.110576] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/19/2021] [Accepted: 02/09/2021] [Indexed: 11/26/2022]
Abstract
The interpretation of thermal-gradient data depends on the behavioral drives reported or assumed, and on the underlying behavioral models explaining how such drives operate. The best-known example is positive thermotaxis, a thermoregulatory behavioral drive frequently linked to a dual set-point model of thermoregulation around a target range. This behavioral drive is often assumed as dominant among 'ectotherms', including amphibians. However, we argue that, because amphibians are extremely diverse, they may exhibit alternative behavioral drives in thermal gradients, and tackle this idea from two perspectives. First, we provide a historical review of original definitions and proposed limits for inference. Second, although caveats apply, we propose that a cross-study analysis of data of temperature settings of gradients and the temperatures selected by amphibians would corroborate alternative behavioral drives, including negative thermotaxis. Therefore, we analyzed published data focusing on such relationships and show that gradient temperature settings influence the temperatures selected by amphibians, with further effects of phylogeny and ontogeny. We conclude that thermal gradient experiments are outstanding tools to investigate behavioral drives, but no given drive can be assumed a priori unless additional information about thermoregulation is available. Based on the historical debate, we propose using selected temperatures and preferred temperatures as different concepts, the former merely operational and the second explicitly linked to positive thermotaxis (and thus compatible with dual set-point thermoregulation). Under this view, thermal preferences would stand for a hypothesis of a behavioral drive (positive thermotaxis) requiring formal testing. These considerations impact the scope for inference based on thermal gradient experiments, particularly ecological modeling and emerging disease.
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Affiliation(s)
- Carlos A Navas
- Department of Physiology, Biosciences Institute, University of São Paulo, Brazil.
| | - Sidney F Gouveia
- Departament of Ecology, Federal University of Sergipe, São Cristóvão, Brazil
| | - Jaiber J Solano-Iguarán
- Institute of Environmental and Evolutionary Sciences, Austral University of Chile, Isla Teja Campus, Valdivia, Chile
| | - Marcela A Vidal
- Departament of Basic Sciences, Faculty of Sciences, Bío-Bío University, Casilla 447, Chillán, Chile
| | - Leonardo D Bacigalupe
- Institute of Environmental and Evolutionary Sciences, Austral University of Chile, Isla Teja Campus, Valdivia, Chile
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9
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Shinner R, Terblanche JS, Clusella-Trullas S. Across-stage consequences of thermal stress have trait-specific effects and limited fitness costs in the harlequin ladybird, Harmonia axyridis. Evol Ecol 2020. [DOI: 10.1007/s10682-020-10045-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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10
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Ji SX, Wang XD, Shen XN, Liang L, Liu WX, Wan FH, Lü ZC. Using RNA Interference to Reveal the Function of Chromatin Remodeling Factor ISWI in Temperature Tolerance in Bemisia tabaci Middle East-Asia Minor 1 Cryptic Species. INSECTS 2020; 11:insects11020113. [PMID: 32050711 PMCID: PMC7074109 DOI: 10.3390/insects11020113] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 12/29/2022]
Abstract
Invasive species often encounter rapid environmental changes during invasions and only the individuals that successfully overcome environmental stresses can colonize and spread. Chromatin remodeling may be essential in environmental adaptation. To assess the functions of imitation switch (ISWI) in invasive Bemisia tabaci Middle East-Asia Minor 1 (MEAM1) cryptic species, we cloned and characterized the MEAM1 BtISWI gene and determined its functions in response to thermal stress. The full-length cDNA of BtISWI was 3712 bp, with a 3068 bp open reading frame (ORF) encoding a 118.86 kDa protein. BtISWI mRNA expression was significantly up-regulated after exposure to heat shock or cold shock conditions, indicating that BtISWI expression can be induced by thermal stress. After feeding double-stranded RNA (dsRNA), specifically for BtISWI, resistance to both heat and cold decreased significantly, suggesting that BtISWI may function directly in the thermal tolerance of MEAM1. Moreover, the preferred temperature of MEAM1 adults fed dsRNA was 1.9-3.5 °C higher than the control groups. Taken together, our findings highlight the importance of epigenetic gene regulation in the thermal response or thermal adaptation of invasive Bemisia tabaci (B. tabaci), and provide a new potential target for establishing sustainable control strategies for B. tabaci.
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Affiliation(s)
- Shun-Xia Ji
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
| | - Xiao-Di Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
| | - Xiao-Na Shen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
| | - Lin Liang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
| | - Wan-Xue Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
| | - Fang-Hao Wan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
- Agricultural Genome Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Zhi-Chuang Lü
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (S.-X.J.); (X.-D.W.); (X.-N.S.); (L.L.); (W.-X.L.); (F.-H.W.)
- Correspondence: ; Tel.: +86-10-8210-9572
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11
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Tratter Kinzner M, Kinzner MC, Kaufmann R, Hoffmann AA, Arthofer W, Schlick-Steiner BC, Steiner FM. Is temperature preference in the laboratory ecologically relevant for the field? The case of Drosophila nigrosparsa. Glob Ecol Conserv 2019. [DOI: 10.1016/j.gecco.2019.e00638] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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12
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Giraldo D, Adden A, Kuhlemann I, Gras H, Geurten BRH. Correcting locomotion dependent observation biases in thermal preference of Drosophila. Sci Rep 2019; 9:3974. [PMID: 30850647 PMCID: PMC6408449 DOI: 10.1038/s41598-019-40459-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 02/18/2019] [Indexed: 11/21/2022] Open
Abstract
Sensing environmental temperatures is essential for the survival of ectothermic organisms. In Drosophila, two of the most used methodologies to study temperature preferences (TP) and the genes involved in thermosensation are two-choice assays and temperature gradients. Whereas two-choice assays reveal a relative TP, temperature gradients can identify the absolute Tp. One drawback of gradients is that small ectothermic animals are susceptible to cold-trapping: a physiological inability to move at the cold area of the gradient. Often cold-trapping cannot be avoided, biasing the resulting TP to lower temperatures. Two mathematical models were previously developed to correct for cold-trapping. These models, however, focus on group behaviour which can lead to overestimation of cold-trapping due to group aggregation. Here we present a mathematical model that simulates the behaviour of individual Drosophila in temperature gradients. The model takes the spatial dimension and temperature difference of the gradient into account, as well as the rearing temperature of the flies. Furthermore, it allows the quantification of cold-trapping and reveals unbiased TP. Additionally, our model reveals that flies have a range of tolerable temperatures, and this measure is more informative about the behaviour than commonly used TP. Online simulation is hosted at http://igloo.uni-goettingen.de. The code can be accessed at https://github.com/zerotonin/igloo.
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Affiliation(s)
- Diego Giraldo
- Department for Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
| | - Andrea Adden
- Department for Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany.,Vision Group, Department of Biology, Lund University, Lund, Sweden
| | - Ilyas Kuhlemann
- Department for Biophysical Chemistry, Institute for Physical Chemistry, Georg-August University Göttingen, Göttingen, Germany
| | - Heribert Gras
- Department for Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
| | - Bart R H Geurten
- Department for Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany.
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13
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Nurme K, Must A, Merivee E. Link between elevated locomotor activity and the spike bursting of antennal thermosensitive neurons in the carabid beetle Pterostichus oblongopunctatus. ACTA ZOOL ACAD SCI H 2019. [DOI: 10.17109/azh.65.suppl.21.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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14
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Van BERKEL J, CLUSELLA-TRULLAS S. Behavioral thermoregulation is highly repeatable and unaffected by digestive status inAgama atra. Integr Zool 2018; 13:482-493. [DOI: 10.1111/1749-4877.12325] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jenna Van BERKEL
- Centre for Invasion Biology, Department of Botany and Zoology; Stellenbosch University; Matieland South Africa
| | - Susana CLUSELLA-TRULLAS
- Centre for Invasion Biology, Department of Botany and Zoology; Stellenbosch University; Matieland South Africa
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15
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Soto-Padilla A, Ruijsink R, Sibon OCM, van Rijn H, Billeter JC. Thermosensory perception regulates speed of movement in response to temperature changes in Drosophila melanogaster. ACTA ACUST UNITED AC 2018; 221:jeb.174151. [PMID: 29650755 DOI: 10.1242/jeb.174151] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 04/10/2018] [Indexed: 12/25/2022]
Abstract
Temperature influences the physiology and behavior of all organisms. For ectotherms, which lack central temperature regulation, temperature adaptation requires sheltering from or moving to a heat source. As temperature constrains the rate of metabolic reactions, it can directly affect ectotherm physiology and thus behavioral performance. This direct effect is particularly relevant for insects, as their small bodies readily equilibrate with ambient temperature. In fact, models of enzyme kinetics applied to insect behavior predict performance at different temperatures suggesting that thermal physiology governs behavior. However, insects also possess thermosensory neurons critical for locating preferred temperatures, showing cognitive control. This suggests that temperature-related behavior can emerge directly from a physiological effect, indirectly as a consequence of thermosensory processing, or through a combination of both. To separate the roles of thermal physiology and cognitive control, we developed an arena that allows fast temperature changes in time and space, and in which animals' movements are automatically quantified. We exposed wild-type Drosophila melanogaster and thermosensory receptor mutants to a dynamic temperature environment and tracked their movements. The locomotor speed of wild-type flies closely matched models of enzyme kinetics, but the behavior of thermosensory mutants did not. Mutations in thermosensory receptor gene dTrpA1 (Transient Receptor Potential A1) expressed in the brain resulted in a complete lack of response to temperature changes, while mutations in peripheral thermosensory receptor gene Gr28b(D) resulted in a diminished response. We conclude that flies react to temperature through cognitive control, informed by interactions between various thermosensory neurons, the behavioral output of which resembles models of enzyme kinetics.
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Affiliation(s)
- Andrea Soto-Padilla
- Groningen Institute for Evolutionary Life Sciences, PO Box 11103, University of Groningen, Groningen, 9700 CC, The Netherlands.,Department of Cell Biology, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Rick Ruijsink
- Ruijsink Dynamic Engineering, Keizerstraat 57, 2801NK Gouda, The Netherlands
| | - Ody C M Sibon
- Department of Cell Biology, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Hedderik van Rijn
- Department of Psychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS Groningen, The Netherlands
| | - Jean-Christophe Billeter
- Groningen Institute for Evolutionary Life Sciences, PO Box 11103, University of Groningen, Groningen, 9700 CC, The Netherlands
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16
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Huey RB, Pianka ER. Body temperature distributions of active diurnal lizards in three deserts: Skewed up or skewed down? Funct Ecol 2018. [DOI: 10.1111/1365-2435.12966] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raymond B. Huey
- Department of Biology University of Washington Seattle WA USA
| | - Eric R. Pianka
- Department of Integrative Biology University of Texas Austin TX USA
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17
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Johansson MP, Laurila A. Maximum thermal tolerance trades off with chronic tolerance of high temperature in contrasting thermal populations of Radix balthica. Ecol Evol 2017; 7:3149-3156. [PMID: 28480014 PMCID: PMC5415526 DOI: 10.1002/ece3.2923] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 02/19/2017] [Accepted: 02/21/2017] [Indexed: 01/01/2023] Open
Abstract
Thermal adaptation theory predicts that thermal specialists evolve in environments with low temporal and high spatial thermal variation, whereas thermal generalists are favored in environments with high temporal and low spatial variation. The thermal environment of many organisms is predicted to change with globally increasing temperatures and thermal specialists are presumably at higher risk than thermal generalists. Here we investigated critical thermal maximum (CT max) and preferred temperature (Tp) in populations of the common pond snail (Radix balthica) originating from a small-scale system of geothermal springs in northern Iceland, where stable cold (ca. 7°C) and warm (ca. 23°C) habitats are connected with habitats following the seasonal thermal variation. Irrespective of thermal origin, we found a common Tp for all populations, corresponding to the common temperature optimum (Topt) for fitness-related traits in these populations. Warm-origin snails had lowest CT max. As our previous studies have found higher chronic temperature tolerance in the warm populations, we suggest that there is a trade-off between high temperature tolerance and performance in other fitness components, including tolerance to chronic thermal stress. Tp and CT max were positively correlated in warm-origin snails, suggesting a need to maintain a minimum "warming tolerance" (difference in CT max and habitat temperature) in warm environments. Our results highlight the importance of high mean temperature in shaping thermal performance curves.
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Affiliation(s)
- Magnus P. Johansson
- Animal Ecology/Department of Ecology and GeneticsEvolutionary Biology CentreUppsala UniversityUppsalaSweden
| | - Anssi Laurila
- Animal Ecology/Department of Ecology and GeneticsEvolutionary Biology CentreUppsala UniversityUppsalaSweden
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18
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Haupt TM, Sinclair BJ, Chown SL. Thermal preference and performance in a sub-Antarctic caterpillar: A test of the coadaptation hypothesis and its alternatives. JOURNAL OF INSECT PHYSIOLOGY 2017; 98:108-116. [PMID: 28034677 DOI: 10.1016/j.jinsphys.2016.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 12/22/2016] [Accepted: 12/22/2016] [Indexed: 06/06/2023]
Abstract
Physiological ecologists have long assumed that thermoregulatory behaviour will evolve to optimise physiological performance. The coadaptation hypothesis predicts that an animal's preferred body temperature will correspond to the temperature at which its performance is optimal. Here we use a strong inference approach to examine the relationship between thermal preference and locomotor performance in the caterpillars of a wingless sub-Antarctic moth, Pringleophaga marioni Viette (Tineidae). The coadaptation hypothesis and its alternatives (suboptimal is optimal, thermodynamic effect, trait variation) are tested. Compared to the optimal movement temperature (22.5°C for field-fresh caterpillars and 25, 20, 22.5, 25 and 20°C following seven day acclimations to 0, 5, 10, 15 and 5-15°C respectively), caterpillar thermal preference was significantly lower (9.2°C for field-fresh individuals and 9.4, 8.8, 8.1, 5.2 and 4.6°C following acclimation to 0, 5, 10, 15 and 5-15°C, respectively). Together with the low degree of asymmetry observed in the performance curves, and the finding that acclimation to high temperatures did not result in maximal performance, all, but one of the above hypotheses (i.e. 'trait variation') was rejected. The thermal preference of P. marioni caterpillars more closely resembles temperatures at which survival is high (5-10°C), or where feeding is optimal (10°C), than where locomotion speed is maximal, suggesting that thermal preference may be optimised for overall fitness rather than for a given trait.
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Affiliation(s)
- Tanya M Haupt
- Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
| | - Brent J Sinclair
- Department of Biology, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Steven L Chown
- School of Biological Sciences, Monash University, Victoria 3800, Australia
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19
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Abram PK, Boivin G, Moiroux J, Brodeur J. Behavioural effects of temperature on ectothermic animals: unifying thermal physiology and behavioural plasticity. Biol Rev Camb Philos Soc 2016; 92:1859-1876. [PMID: 28980433 DOI: 10.1111/brv.12312] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 10/06/2016] [Accepted: 10/14/2016] [Indexed: 12/20/2022]
Abstract
Temperature imposes significant constraints on ectothermic animals, and these organisms have evolved numerous adaptations to respond to these constraints. While the impacts of temperature on the physiology of ectotherms have been extensively studied, there are currently no frameworks available that outline the multiple and often simultaneous pathways by which temperature can affect behaviour. Drawing from the literature on insects, we propose a unified framework that should apply to all ectothermic animals, generalizing temperature's behavioural effects into: (1) kinetic effects, resulting from temperature's bottom-up constraining influence on metabolism and neurophysiology over a range of timescales (from short to long term), and (2) integrated effects, where the top-down integration of thermal information intentionally initiates or modifies a behaviour (behavioural thermoregulation, thermal orientation, thermosensory behavioural adjustments). We discuss the difficulty in distinguishing adaptive behavioural changes from constraints when observing animals' behavioural responses to temperature. We then propose two complementary approaches to distinguish adaptations from constraints, and categorize behaviours according to our framework: (i) 'kinetic null modelling' of temperature's effects on behaviour; and (ii) behavioural ecology experiments using temperature-insensitive mutants. Our framework should help to guide future research on the complex relationship between temperature and behaviour in ectothermic animals.
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Affiliation(s)
- Paul K Abram
- Institut de Recherche en Biologie Végétale, Département de sciences biologiques, Université de Montréal, Montréal, Canada.,Centre de Recherche et de Développement de St-Jean-sur-Richelieu, Agriculture et Agroalimentaire Canada, Saint-Jean-sur-Richelieu, Canada
| | - Guy Boivin
- Centre de Recherche et de Développement de St-Jean-sur-Richelieu, Agriculture et Agroalimentaire Canada, Saint-Jean-sur-Richelieu, Canada
| | - Joffrey Moiroux
- Institut de Recherche en Biologie Végétale, Département de sciences biologiques, Université de Montréal, Montréal, Canada.,Centre de Recherche et de Développement de St-Jean-sur-Richelieu, Agriculture et Agroalimentaire Canada, Saint-Jean-sur-Richelieu, Canada
| | - Jacques Brodeur
- Institut de Recherche en Biologie Végétale, Département de sciences biologiques, Université de Montréal, Montréal, Canada
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20
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Rajpurohit S, Schmidt PS. Measuring thermal behavior in smaller insects: A case study in Drosophila melanogaster demonstrates effects of sex, geographic origin, and rearing temperature on adult behavior. Fly (Austin) 2016; 10:149-61. [PMID: 27230726 PMCID: PMC5036927 DOI: 10.1080/19336934.2016.1194145] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/20/2016] [Accepted: 05/20/2016] [Indexed: 10/21/2022] Open
Abstract
Measuring thermal behavior in smaller insects is particularly challenging. In this study, we describe a new horizontal thermal gradient apparatus designed to study adult thermal behavior in small insects and apply it using D. melanogaster as a model and case study. Specifically, we used this apparatus and associated methodology to examine the effects of sex, geographic origin, and developmental rearing temperature on temperature preferences exhibited by adults in a controlled laboratory environment. The thermal gradient established by the apparatus was stable over diurnal and calendar time. Furthermore, the distribution of adult flies across thermal habitats within the apparatus remained stable following the period of acclimation, as evidenced by the high degree of repeatability across both biological and technical replicates. Our data demonstrate significant and predictable variation in temperature preference for all 3 assayed variables. Behaviorally, females were more sensitive than males to higher temperatures. Flies originating from high latitude, temperate populations exhibited a greater preference for cooler temperatures; conversely, flies originating from low latitude, tropical habitats demonstrated a relative preference for higher temperatures. Similarly, larval rearing temperature was positively associated with adult thermal behavior: low culture temperatures increased the relative adult preference for cooler temperatures, and this response was distinct between the sexes and for flies from the temperate and subtropical geographic regions. Together, these results demonstrate that the temperature chamber apparatus elicits robust, predictable, and quantifiable thermal preference behavior that could readily be applied to other taxa to examine the role of temperature-mediated behavior in a variety of contexts.
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Affiliation(s)
- Subhash Rajpurohit
- Department of Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - Paul S. Schmidt
- Department of Biology, University of Pennsylvania, Philadelphia, PA, USA
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21
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McCue MD, Boardman L, Clusella-Trullas S, Kleynhans E, Terblanche JS. The speed and metabolic cost of digesting a blood meal depends on temperature in a major disease vector. ACTA ACUST UNITED AC 2016; 219:1893-902. [PMID: 27059066 DOI: 10.1242/jeb.138669] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/27/2016] [Indexed: 11/20/2022]
Abstract
The energetics of processing a meal is crucial for understanding energy budgets of animals in the wild. Given that digestion and its associated costs may be dependent on environmental conditions, it is necessary to obtain a better understanding of these costs under diverse conditions and identify resulting behavioural or physiological trade-offs. This study examines the speed and metabolic costs - in cumulative, absolute and relative energetic terms - of processing a bloodmeal for a major zoonotic disease vector, the tsetse fly Glossina brevipalpis, across a range of ecologically relevant temperatures (25, 30 and 35°C). Respirometry showed that flies used less energy digesting meals faster at higher temperatures but that their starvation tolerance was reduced, supporting the prediction that warmer temperatures are optimal for bloodmeal digestion while cooler temperatures should be preferred for unfed or post-absorptive flies. (13)C-Breath testing revealed that the flies oxidized dietary glucose and amino acids within the first couple of hours of feeding and overall oxidized more dietary nutrients at the cooler temperatures, supporting the premise that warmer digestion temperatures are preferred because they maximize speed and minimize costs. An independent test of these predictions using a thermal gradient confirmed that recently fed flies selected warmer temperatures and then selected cooler temperatures as they became post-absorptive, presumably to maximize starvation resistance. Collectively these results suggest there are at least two thermal optima in a given population at any time and flies switch dynamically between optima throughout feeding cycles.
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Affiliation(s)
- Marshall D McCue
- Department of Biological Sciences, St Mary's University, San Antonio, TX 78228, USA
| | - Leigh Boardman
- Centre for Invasion Biology, Department of Conservation Ecology and Entomology, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Susana Clusella-Trullas
- Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Elsje Kleynhans
- Centre for Invasion Biology, Department of Conservation Ecology and Entomology, Stellenbosch University, Stellenbosch 7600, South Africa
| | - John S Terblanche
- Centre for Invasion Biology, Department of Conservation Ecology and Entomology, Stellenbosch University, Stellenbosch 7600, South Africa
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22
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Vickers M, Schwarzkopf L. A Random Walk in the Park: An Individual-Based Null Model for Behavioral Thermoregulation. Am Nat 2016; 187:481-90. [DOI: 10.1086/685433] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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23
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Woods HA, Dillon ME, Pincebourde S. The roles of microclimatic diversity and of behavior in mediating the responses of ectotherms to climate change. J Therm Biol 2015; 54:86-97. [DOI: 10.1016/j.jtherbio.2014.10.002] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 10/07/2014] [Accepted: 10/07/2014] [Indexed: 12/22/2022]
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24
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Faye E, Herrera M, Bellomo L, Silvain JF, Dangles O. Strong discrepancies between local temperature mapping and interpolated climatic grids in tropical mountainous agricultural landscapes. PLoS One 2014; 9:e105541. [PMID: 25141212 PMCID: PMC4139370 DOI: 10.1371/journal.pone.0105541] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 07/24/2014] [Indexed: 11/19/2022] Open
Abstract
Bridging the gap between the predictions of coarse-scale climate models and the fine-scale climatic reality of species is a key issue of climate change biology research. While it is now well known that most organisms do not experience the climatic conditions recorded at weather stations, there is little information on the discrepancies between microclimates and global interpolated temperatures used in species distribution models, and their consequences for organisms' performance. To address this issue, we examined the fine-scale spatiotemporal heterogeneity in air, crop canopy and soil temperatures of agricultural landscapes in the Ecuadorian Andes and compared them to predictions of global interpolated climatic grids. Temperature time-series were measured in air, canopy and soil for 108 localities at three altitudes and analysed using Fourier transform. Discrepancies between local temperatures vs. global interpolated grids and their implications for pest performance were then mapped and analysed using GIS statistical toolbox. Our results showed that global interpolated predictions over-estimate by 77.5 ± 10% and under-estimate by 82.1 ± 12% local minimum and maximum air temperatures recorded in the studied grid. Additional modifications of local air temperatures were due to the thermal buffering of plant canopies (from -2.7 °K during daytime to 1.3 °K during night-time) and soils (from -4.9 °K during daytime to 6.7 °K during night-time) with a significant effect of crop phenology on the buffer effect. This discrepancies between interpolated and local temperatures strongly affected predictions of the performance of an ectothermic crop pest as interpolated temperatures predicted pest growth rates 2.3-4.3 times lower than those predicted by local temperatures. This study provides quantitative information on the limitation of coarse-scale climate data to capture the reality of the climatic environment experienced by living organisms. In highly heterogeneous region such as tropical mountains, caution should therefore be taken when using global models to infer local-scale biological processes.
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Affiliation(s)
- Emile Faye
- Institut de Recherche pour le Développement (IRD), UR 072, Laboratoire Evolution, Génomes et Spéciation, UPR 9034, Centre National de la Recherche Scientifique (CNRS), Gif sur Yvette, France et Université Paris-Sud 11, Orsay, France
- UPMC Univ Paris06, Sorbonne Universités, Paris, France
- Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
| | - Mario Herrera
- Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
| | - Lucio Bellomo
- Mediterranean Institute of Oceanography (MIO) CNRS/INSU, IRD, UM 110, Université de Toulon, La Garde, France
| | - Jean-François Silvain
- Institut de Recherche pour le Développement (IRD), UR 072, Laboratoire Evolution, Génomes et Spéciation, UPR 9034, Centre National de la Recherche Scientifique (CNRS), Gif sur Yvette, France et Université Paris-Sud 11, Orsay, France
| | - Olivier Dangles
- Institut de Recherche pour le Développement (IRD), UR 072, Laboratoire Evolution, Génomes et Spéciation, UPR 9034, Centre National de la Recherche Scientifique (CNRS), Gif sur Yvette, France et Université Paris-Sud 11, Orsay, France
- Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
- Instituto de Ecología, Universidad Mayor San Andrés, Cotacota, La Paz, Bolivia
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25
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Chemosensory and thermal cue responses in the sub-Antarctic moth Pringleophaga marioni: Do caterpillars choose Wandering Albatross nest proxies? Polar Biol 2014. [DOI: 10.1007/s00300-014-1457-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Castañeda LE, Balanyà J, Rezende EL, Santos M. Vanishing chromosomal inversion clines in Drosophila subobscura from Chile: is behavioral thermoregulation to blame? Am Nat 2013; 182:249-59. [PMID: 23852358 DOI: 10.1086/671057] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Chromosomal inversion clines paralleling the long-standing ones in native Palearctic populations of Drosophila subobscura evolved swiftly after this species invaded the Americas in the late 1970s and early 1980s. However, the new clines did not consistently continue to converge on the Old World baseline. Our recent survey of Chilean populations of D. subobscura shows that inversion clines have faded or even changed sign with latitude. Here, we investigate the hypothesis that this fading of inversion clines might be due to the Bogert effect, namely, that flies' thermoregulatory behavior has eventually compensated for environmental variation in temperature, thus buffering selection on thermal-related traits. We show that latitudinal divergence in thermal preference (Tp) has evolved in Chile for females, with higher-latitude flies having a lower mean Tp. Plastic responses in Tp also lessen latitudinal thermal variation because flies developed at colder temperatures prefer warmer microclimates. Our results are consistent with the idea that active behavioral thermoregulation might buffer environmental variation and reduce the potential effect of thermal selection on other traits as chromosomal arrangements.
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Affiliation(s)
- Luis E Castañeda
- Departament de Genètica i de Microbiologia, Grup de Biologia Evolutiva (GBE), Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain.
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