Role of avoidance behavior in the response of Folsomia candida to above‐freezing cooling temperatures
Identifieur interne : 000F37 ( Main/Exploration ); précédent : 000F36; suivant : 000F38Role of avoidance behavior in the response of Folsomia candida to above‐freezing cooling temperatures
Auteurs : G. Boiteau [Canada] ; P. Mackinley [Canada]Source :
- Entomologia Experimentalis et Applicata [ 0013-8703 ] ; 2013-04.
Abstract
Although avoidance behavior is thought to be one of the major strategies for arthropods to cope with cold, there is a general lack of data supporting its use. This study tested the suggestion that Collembola migrate deeper into the soil to avoid cooling temperatures during the transition from summer to winter. We released mature hemi‐edaphic Folsomia candida Willem (Collembola: Isotomidae) in large (5 301 cm3) and small (306 cm3) soil microcosms exposed to ambient temperatures ranging between 5 and 20 °C. Springtails released in the large microcosms for periods of 2, 3, and 4 weeks dispersed throughout the soil column but remained more abundant in the upper third layer of the soil column whether exposed to weekly decreasing temperatures or a constant ambient temperature of 20 °C. Both small (juvenile) and large (mature) springtails exposed to cooling were more abundant in the upper third than in the middle or lower third of the soil columns after 2, 3, or 4 weeks. Groups of F. candida released in small microcosms provided with a positive soil temperature gradient displayed the same vertical distribution, with 90% of individuals clustered in the top 4.5 cm of the 15‐cm column whether exposed to air temperatures of 5, 10, 15, or 20 °C. Results from the two types of microcosms demonstrated that the vertical distribution of springtails remains strongly biased to the upper soil layer regardless of the temperature of their environment and whether the temperature in the soil column was uniform or graduated. This supports our prediction that hemi‐edaphic species such as F. candida do not relocate to warmer deeper soil layers, but tend to remain in the surface soil layer where they can acclimate to the cooling temperature.
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DOI: 10.1111/eea.12048
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Boiteau</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Potato Research Center, Agriculture and Agri‐Food Canada, 850 Lincoln Road, PO Box 20280, NB, E3B 4Z7, Fredericton</wicri:regionArea><wicri:noRegion>Fredericton</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Canada</country></affiliation></author><author><name sortKey="Mackinley, P" sort="Mackinley, P" uniqKey="Mackinley P" first="P." last="Mackinley">P. Mackinley</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Potato Research Center, Agriculture and Agri‐Food Canada, 850 Lincoln Road, PO Box 20280, NB, E3B 4Z7, Fredericton</wicri:regionArea><wicri:noRegion>Fredericton</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Entomologia Experimentalis et Applicata</title><title level="j" type="abbrev">Entomol Exp Appl</title><idno type="ISSN">0013-8703</idno><idno type="eISSN">1570-7458</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-04">2013-04</date><biblScope unit="volume">147</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="50">50</biblScope><biblScope unit="page" to="60">60</biblScope></imprint><idno type="ISSN">0013-8703</idno></series><idno type="istex">058F6CDF7196333F26C848FE58012FD470BB745A</idno><idno type="DOI">10.1111/eea.12048</idno><idno type="ArticleID">EEA12048</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0013-8703</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Although avoidance behavior is thought to be one of the major strategies for arthropods to cope with cold, there is a general lack of data supporting its use. This study tested the suggestion that Collembola migrate deeper into the soil to avoid cooling temperatures during the transition from summer to winter. We released mature hemi‐edaphic Folsomia candida Willem (Collembola: Isotomidae) in large (5 301 cm3) and small (306 cm3) soil microcosms exposed to ambient temperatures ranging between 5 and 20 °C. Springtails released in the large microcosms for periods of 2, 3, and 4 weeks dispersed throughout the soil column but remained more abundant in the upper third layer of the soil column whether exposed to weekly decreasing temperatures or a constant ambient temperature of 20 °C. Both small (juvenile) and large (mature) springtails exposed to cooling were more abundant in the upper third than in the middle or lower third of the soil columns after 2, 3, or 4 weeks. Groups of F. candida released in small microcosms provided with a positive soil temperature gradient displayed the same vertical distribution, with 90% of individuals clustered in the top 4.5 cm of the 15‐cm column whether exposed to air temperatures of 5, 10, 15, or 20 °C. Results from the two types of microcosms demonstrated that the vertical distribution of springtails remains strongly biased to the upper soil layer regardless of the temperature of their environment and whether the temperature in the soil column was uniform or graduated. This supports our prediction that hemi‐edaphic species such as F. candida do not relocate to warmer deeper soil layers, but tend to remain in the surface soil layer where they can acclimate to the cooling temperature.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Boiteau, G" sort="Boiteau, G" uniqKey="Boiteau G" first="G." last="Boiteau">G. 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