Escribano-Álvarez Pablo, Pertierra Luis R, Martínez Brezo, Chown Steven L, Olalla-Tárraga Miguel Á
Dpto. Biología, Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, 28933, Móstoles, Spain.
Securing Antarctica's Environmental Future, School of Biological Sciences, Monash University, Melbourne, VIC, 3800, Australia.
Curr Res Insect Sci. 2021 Nov 28;2:100023. doi: 10.1016/j.cris.2021.100023. eCollection 2022.
Global changes in soil surface temperatures are altering the abundances and distribution ranges of invertebrate species worldwide, including effects on soil microarthropods such as springtails (Collembola), which are vital for maintaining soil health and providing ecosystem services. Studies of thermal tolerance limits in soil invertebrates have the potential to provide information on demographic responses to climate change and guide assessments of possible impacts on the structure and functioning of ecosystems. Here, we review the state of knowledge of thermal tolerance limits in Collembola. Thermal tolerance metrics have diversified over time, which should be taken into account when conducting large-scale comparative studies. A temporal trend shows that the estimation of 'Critical Thermal Limits' (CTL) is becoming more common than investigations of 'Supercooling Point' (SCP), despite the latter being the most widely used metric. Indeed, most studies (66%) in Collembola have focused on cold tolerance; fewer have assessed heat tolerance. The majority of thermal tolerance data are from temperate and polar regions, with fewer assessments from tropical and subtropical latitudes. While the hemiedaphic life form represents the majority of records at low latitudes, euedaphic and epedaphic groups remain largely unsampled in these regions compared to the situation in temperate and high latitude regions, where sampling records show a more balanced distribution among the different life forms. Most CTL data are obtained during the warmest period of the year, whereas SCP and 'Lethal Temperature' (LT) show more variation in terms of the season when the data were collected. We conclude that more attention should be given to understudied zoogeographical regions across the tropics, as well as certain less-studied clades such as the family Neanuridae, to identify the role of thermal tolerance limits in the redistribution of species under changing climates.
全球土壤表面温度的变化正在改变世界各地无脊椎动物物种的丰度和分布范围，包括对土壤微型节肢动物（如弹尾虫，对维持土壤健康和提供生态系统服务至关重要）的影响。对土壤无脊椎动物耐热极限的研究有可能提供有关其对气候变化的种群响应信息，并指导对生态系统结构和功能可能受到的影响进行评估。在此，我们综述了弹尾虫耐热极限的知识现状。随着时间的推移，耐热性指标已经多样化，在进行大规模比较研究时应予以考虑。一个时间趋势表明，尽管“过冷却点”（SCP）是使用最广泛的指标，但“临界热极限”（CTL）的估计正变得比SCP的研究更为普遍。事实上，弹尾虫的大多数研究（66%）都集中在耐寒性上；评估耐热性的较少。大多数耐热性数据来自温带和极地地区，来自热带和亚热带纬度的评估较少。虽然半土栖生活型在低纬度地区的记录中占多数，但与温带和高纬度地区相比，在这些地区，真土栖和表土栖类群在很大程度上仍未被采样，在温带和高纬度地区，采样记录显示不同生活型之间的分布更为平衡。大多数CTL数据是在一年中最温暖的时期获得的，而SCP和“致死温度”（LT）在数据收集季节方面表现出更多变化。我们得出结论，应更多关注热带地区尚未充分研究的动物地理区域，以及某些研究较少的类群，如近铗虫科，以确定耐热极限在气候变化下物种重新分布中的作用。
