Can thermoregulation explain differences in habitat selection and distribution range in Calopteryx damselflies?

IF 2.9 2区 生物学 Q2 BIOLOGY
Linda Laakso , Jaakko J. Ilvonen , Jukka Suhonen
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Abstract

Body temperature is important for the behavioural and ecological performance of winged insects whose body temperature must exceed ambient temperature to fly. Although thermoregulation may affect geographical distribution and habitat selection of closely related species. The few studies that have been done on this subject have shown mixed results. Our aim was to study whether thermoregulation affects the coexistence of Calopteryx damselflies. We studied the body temperature of C. virgo and C. splendens under both field and laboratory conditions using an insect thermometer. These damselflies are ideal for studying thermoregulation, because they are closely related, but vary in colouration and size – factors that heavily influence insect thermoregulation. Results from our field and laboratory studies were consistent. Individual temperatures followed ambient temperatures linearly on a level ∼3 °C above it. C. virgo could maintain higher body temperatures than C. splendens. Individual body temperature at the activation, or the time before activation was not affected by species, sex or wing size. However, C. virgo warmed up faster than C. splendens in laboratory conditions. Thermoregulation may be a key factor explaining differences in geographical distribution, habitat preferences and behavioral differences between these species. The more melanized species C. virgo has a northern distribution range than less melanized C. splendens. Additionally, C. virgo inhabits shadier brooks and rivers whereas C. splendens prefers open and sunny habitats. C. virgo also wakes up earlier and is a more effective territorial contestant than C. splendens. These differences may partly be explained by their thermoecological differences.
体温调节能否解释黄雀豆娘在栖息地选择和分布范围上的差异?
有翅昆虫的体温必须高于环境温度才能飞行,体温对昆虫的行为和生态性能至关重要。尽管温度调节可能影响地理分布和近缘物种的栖息地选择。关于这一主题的少数研究显示了不同的结果。我们的目的是研究体温调节是否影响Calopteryx豆娘的共存。采用昆虫体温计对室女花和锦绣蓟马的体温进行了野外和室内研究。这些豆娘是研究体温调节的理想对象,因为它们是近亲,但颜色和大小不同——这些因素严重影响昆虫的体温调节。我们的实地和实验室研究结果是一致的。在高于该温度~ 3°C的水平上,个人温度与环境温度呈线性关系。处女座C.可以维持比splendens C.更高的体温。个体在激活时或激活前的体温不受物种、性别或翅膀大小的影响。然而,在实验室条件下,室女座c比splendens c升温更快。温度调节可能是解释这些物种之间地理分布、栖息地偏好和行为差异的关键因素。黑化程度较高的品种室女座C. virgo比黑化程度较低的C. splendens的分布范围更北。此外,室女座C.室女座C.室女座C.室女座C.室女座C.室女座C.室女座C.室女座C.室女座C.室女座处女花也醒得更早,是比灿烂花更有效的领土竞争者。这些差异部分可以用它们的热生态差异来解释。
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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