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Many ectothermic species are currently expanding their distributions polewards due to anthropogenic global warming. Molecular genetic mechanisms facilitating range expansion under these conditions are largely unknown, but understanding these could help mitigate expanding pests and disease vectors, or help explain why some species fail to track changing climates. Here, using RNA-seq data, we examin
Insect distributions are shifting rapidly in response to climate change and are undergoing rapid evolutionary change. We investigate the molecular signatures underlying local adaptation in the range-expanding damselfly, Ischnura elegans. Using a landscape genomic approach combined with generalized dissimilarity modelling (GDM), we detect selection signatures on loci via allelic frequency change al
The major histocompatibility complex (MHC) has long served as a model for the evolution of adaptive genetic diversity in wild populations. Pathogen-mediated selection is thought to be a main driver of MHC diversity, but it remains elusive to what degree selection shapes MHC diversity in complex biogeographical scenarios where other evolutionary processes (e.g. genetic drift and introgression) may
A bacterial community may be resistant to environmental disturbances if some of its species show metabolic flexibility and physiological tolerance to the changing conditions. Alternatively, disturbances can change the composition of the community and thereby potentially affect ecosystem processes. The impact of disturbance on the composition of bacterioplankton communities was examined in continuo
Widespread negative correlations between summertime-mean temperatures and precipitation over land regions are a well-known feature of terrestrial climate. This behavior has generally been interpreted in the context of soil moisture atmosphere coupling, with soil moisture deficits associated with reduced rainfall leading to enhanced surface sensible heating and higher surface temperature. The prese
Med den globala uppvärmningen förutspås klimatet i arktiska och subarktiska miljöer förändras påtagligt. Enligt IPCCs senaste rapport kan både temperatur och nederbörd öka dubbelt så mycket som det globala genomsnittet, och störst ökning väntas under vinterhalvåret. Många känsliga ekosystem och miljöer kommer med stor sannolikhet att påverkas redan vid små förändringar. Ett exempel på sådana miljöThe on-going global warming is projected to have large impacts on the arctic and subarctic environment. Especially vulnerable are ecosystems with narrow climatic envelopes and with small possibilities of adaptation. An example of this is the palsa mires, subarctic mire complexes with patches of permafrost. Palsas are peat mounds with a frozen core, formed by the expansion and upheaval of the segre
Increasing tree species diversity is known to enhance soil organic carbon (SOC) stocks, but its effect on SOC stability remains a critical uncertainty for climate mitigation. Through examination of a subtropical karst forest diversity gradient in southwest China, we reveal a fundamental shift in SOC stabilization mechanisms using physical fractionation, 13C nuclear magnetic resonance spectroscopy
Straw addition is a widely used agricultural practice to maintain soil fertility. However, its effects on soil organic carbon (SOC) and nutrient cycling are complex, with outcomes ranging from inhibition to stimulation of SOC mineralization via the priming effect. Freeze-thaw cycles are common disturbances in agroecosystems of high-altitude regions that are predicted to increase in frequency and s
Anthropogenic elevated atmospheric carbon dioxide (eCO2) increases carbon (C) availability to plants. Whether ecosystems store or release this additional C depends on the balance between net primary production (NPP) and soil respiration, where eCO2-stimulated NPP can be constrained by the provisioning of nutrients by microbial decomposers. Ecosystems gradually become more phosphorus (P)-limited as
When dry soil is rewetted, contrasting microbial responses can be induced, ranging from a more resilient type of response with faster growth recovery to a more sensitive type of response with a slower growth recovery. These microbial responses will also affect soil carbon (C) cycling in the rhizosphere. However, whether the microbially-controlled priming of soil organic matter (SOM) mineralization
The ecosystem response to disturbances is a central topic in ecology, and there is growing awareness of the impacts of human-driven climate change on ecosystem stability to disturbances. Terrestrial ecosystems are increasingly exposed to more drought and rainfall events as climate change intensifies. In soils, bacteria and fungi play a key role in ecosystem functioning, yet their responses to drou
Changes in temperature and rainfall associated with altered climatic conditions are likely to significantly alter rates of soil organic matter decomposition. To determine how the combined effects of warming and drought impact the decomposition of fungal necromass, a large and fast-cycling portion of the global soil organic carbon (C) pool, we incubated Hyaloscypha bicolor necromass under both ambi
While fungal necromass is increasingly recognized as a major source of persistent carbon (C) in soils, the relative functional roles of bacteria and fungi in decomposing necromass are not fully resolved, and the processes that select for necromass decomposer communities from the broader soil microbial community are an emerging area of interest. In this study, we characterized the growth of 52 bact
Mycelial residues, also known as fungal necromass, represent a substantial fraction of soil organic matter (SOM) pools in terrestrial ecosystems worldwide. Although microbial decomposers are increasingly recognised as key drivers of fungal necromass carbon stock formation, the diversity and composition of their microbial predators—and the roles these predators play in mediating fungal necromass de
Ectomycorrhizal fungi are critical mediators of nitrogen acquisition in forest ecosystems, exhibiting variation in both host association and metabolic traits that mediate differential responses to forest nitrogen availability. However, how nitrogen acquisition strategies vary among closely related fungal species, how these patterns manifest in conifer-associated ECM fungi, and whether they persist
