Mattia Di Cicco , Emma Galmarini , Tiziana Di Lorenzo , Francesco Cerasoli , Diana Maria Paola Galassi
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引用次数: 0
Abstract
Groundwater ecosystems play a pivotal role in global biodiversity and ecosystem functioning, yet they face increasing pressures from climate change. The amphipod genus Niphargus, a dominant taxon in European groundwater habitats, has shown evidence of broad thermal adaptability that challenges prevailing theories on narrow thermal niches in groundwater species. This study investigated the locomotory behaviour of Niphargus longicaudatus (Costa, 1851), a stygobitic amphipod, under habitat temperature (9 °C) and preferred temperature (15 °C) using 3D tracking techniques. Individuals at 15 °C displayed significantly higher average swimming speed, increased vertical occupancy, and greater trajectory tortuosity compared to those at 9 °C, despite spending a similar amount of time in movement. These behavioural shifts suggest metabolic adjustments enabling enhanced resource exploration at warmer temperatures. The findings are contextualized within the evolutionary history of the amphipod genus Niphargus, shaped by past climatic, geological and hydrological conditions, which may have selected for eurythermal traits in some lineages. These adaptations highlight potential to exploit habitats across a broad temperature range, not necessarily providing an advantage to N.longicaudatus due to the complex effects of climate change on groundwater ecosystems. This work underscores the importance of integrating behavioural, metabolic, and paleoclimatic perspectives in understanding the impacts of climate change on subterranean biodiversity and distribution.
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