@article {4943,
	title = {Strong dispersal limitation of microbial communities at Shackleton Glacier, Antarctica},
	journal = {mSystems},
	volume = {8},
	year = {2023},
	month = {01/2023},
	abstract = {<p>Microbial communities can be structured by both deterministic and stochastic processes, but the relative importance of these processes remains unknown. The ambiguity partly arises from an inability to disentangle soil microbial processes from confounding factors, such as aboveground plant communities or anthropogenic disturbance. In this study, we characterized the relative contributions of determinism and stochasticity to assembly processes of soil bacterial communities across a large environmental gradient of undisturbed Antarctic soils. We hypothesized that harsh soils would impose a strong environmental selection on microbial communities, whereas communities in benign soils would be structured largely by dispersal. Contrary to our expectations, dispersal was the dominant assembly mechanism across the entire soil environmental gradient, including benign environments. The microbial community composition reflects slowly changing soil conditions and dispersal limitation of isolated sites. Thus, stochastic processes, as opposed to deterministic, are primary drivers of soil ecosystem assembly across space at our study site. This is especially surprising given the strong environmental constraints on soil microorganisms in one of the harshest environments on the planet, suggesting that dispersal could be a driving force in microbial community assembly in soils worldwide.</p>},
	keywords = {LTER-MCM, community assembly, determinism, dispersal, niche, stochasticity},
	doi = {10.1128/msystems.01254-22},
	url = {https://journals.asm.org/doi/full/10.1128/msystems.01254-22},
	author = {Lemoine, Nathan P. and Byron Adams and Melisa A. Diaz and Dragone, Nicholas B. and Franco, Andr{\'e} L. C. and Noah Fierer and W. Berry Lyons and Hogg, Ian D. and Diana H. Wall},
	editor = {Lurgi, Miguel}
}
@article {4826,
	title = {Community assembly in the wake of glacial retreat: A meta-analysis},
	journal = {Global Change Biology},
	year = {2022},
	month = {09/2022},
	abstract = {<p>Antarctic biodiversity faces an unknown future with a changing climate. Most terrestrial biota is restricted to limited patches of ice-free land in a sea of ice, where they are adapted to the continent\&$\#$39;s extreme cold and wind and exploit microhabitats of suitable conditions. As temperatures rise, ice-free areas are predicted to expand, more rapidly in some areas than others. There is high uncertainty as to how species\&$\#$39; distributions, physiology, abundance, and survivorship will be affected as their habitats transform. Here we use current knowledge to propose hypotheses that ice-free area expansion (i) will increase habitat availability, though the quality of habitat will vary; (ii) will increase structural connectivity, although not necessarily increase opportunities for species establishment; (iii) combined with milder climates will increase likelihood of non-native species establishment, but may also lengthen activity windows for all species; and (iv) will benefit some species and not others, possibly resulting in increased homogeneity of biodiversity. We anticipate considerable spatial, temporal, and taxonomic variation in species responses, and a heightened need for interdisciplinary research to understand the factors associated with ecosystem resilience under future scenarios. Such research will help identify at-risk species or vulnerable localities and is crucial for informing environmental management and policymaking into the future.</p>},
	keywords = {LTER-MCM, chronosequence, climate change, community assembly, deglaciation, ecological succession, glacial forefields, soil ecosystems},
	doi = {10.1111/gcb.16427},
	url = {https://onlinelibrary.wiley.com/doi/10.1111/gcb.16427},
	author = {Pothula, Satyendra K. and Byron Adams}
}
