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Genetic diversity in experimental, domesticated and wild populations of the related yeasts, Saccharomyces cerevisiae and S. paradoxus has been well described at the global scale. We investigated the population genomics of a local population on a small spatial scale to address two main questions. First, is there genomic variation in a S. paradoxus population at a spatial scale spanning centimeters (microsites) to tens of meters? Second, does the distribution of genomic variants persist over time? Our sample consisted of 42 S. paradoxus strains from 2014 and 43 strains from 2015 collected from the same 72 microsites around four host trees (Quercus rubra and Q. alba) within 1km2 in a mixed hardwood forest in southern Ontario. Six additional S. paradoxus strains recovered from adjacent maple and beech trees in 2015 are also included in the sample. Whole-genome sequencing and genomic SNP analysis revealed five differentiated groups (clades) within the sampled area. The signal of persistence of genotypes in their microsites from 2014 to 2015 was highly significant. Isolates from the same tree tended to be more related than strains from different trees, with limited evidence of dispersal between trees. In growth assays, one genotype had a significantly longer lag phase than the other strains. Our results indicate that different clades co-exist at fine spatial scale, and that population structure persists over at least a one year interval in these wild yeasts, suggesting the efficacy of yearly sampling to follow longer term genetic dynamics in future studies. cohort SNP filevariant file of all strains, contains all single nucleotide polymorphic sites that are bi-allelic only.all_bi-allelic-non-missing.vcf.gz

Dr. Rajiv Jhangiani is the University Teaching Fellow in Open Studies and a faculty member in the Department of Psychology at Kwantlen Polytechnic University. He also currently serves as a Senior Open Education Research & Advocacy Fellow with BCcampus, an Associate Editor of Psychology Learning and Teaching, and an Ambassador for the Center for Open Science. Over the past several years, Dr. Jhangiani has participated in the development of open textbooks and open educational resources for BC Campus. You can learn more about Dr. Jhangiani and his work at http://thatpsychprof.com/ Other yes

Radiographic findings: left kidney – cyst visible in cranial pole; increased gas in intestine over substantial length mildly dilated in these areas; m increase in gastric gas; sacrum has mottled look – superimposed bowel + gas likely; m large spleen; edges of fingers on lat

Although stochastic and deterministic processes have been found to jointly shape structure of natural communities, the relative importance of both forces may vary across different environmental conditions and across levels of biological organization. We tested the effects of abiotic environmental conditions, altered trophic interactions and dispersal limitation on the structure of aquatic microfauna communities in Costa Rican tank bromeliads. Our approach combined natural gradients in environmental conditions with experimental manipulations of bottom-up interactions (resources), top-down interactions (predators) and dispersal at two spatial scales in the field. We found that resource addition strongly increased the abundance and reduced the richness of microfauna communities. Community composition shifted in a predictable way towards assemblages dominated by flagellates and ciliates but with lower abundance and richness of algae and amoebae. While all functional groups responded strongly and predictably to resource addition, similarity among communities at the species level decreased, suggesting a role of stochasticity in species-level assembly processes. Dispersal limitation did not affect the communities. Since our design excluded potential priority effects we can attribute the differences in community similarity to increased demographic stochasticity of resource-enriched communities related to erratic changes in population sizes of some species. In contrast to resources, predators and environmental conditions had negligible effects on community structure. Our results demonstrate that bromeliad microfauna communities are strongly controlled by bottom-up forces. They further suggest that the relative importance of stochasticity may change with productivity and with the organizational level at which communities are examined. protozoa_data.tsvThis file contains a tab-delimited dataset of all protozoa morphospecies counts, as well as sample and treatment information.protozoa_enviro_dataThis file contains a tab-delimited dataset of all environtmental data taken for all samples, including treatment and sampling identification information. This dataset can be merged with protozoa_data.tsv to reproduce the analyses in Petermann et al.protozoa_variables_explanation.rtfThis is a text document (rich text format) which contains metadata regarding all the variables in both .tsv files.

New Westminster’s most significant cultural, economic and natural asset, the riverfront, is slated for major change. How is the city going to balance history, housing, business and tourism, while creating a vibrant and welcoming space for all? Watch the videos below to see how this discussion took shape at the Urban Challenges Forum on January 17, 2018.

Squamish Nation Councillor and community leader Khelsilem joins Am Johal on this first episode of Below the Radar’s Climate Justice & Inequality series. In this episode, they discuss the climate crisis as a result of the colonial project, how climate change hits hardest for those already at a disadvantage, and the spaces where colonialism has existed within climate movements. Khelsilem speaks to his critique of fossil fuel infrastructure, the false narrative of individual responsibility, and the role governments play in worsening the crisis through policy decisions that favour oil and gas. We also hear about innovative affordable housing projects, such as Squamish Nation’s Sen̓áḵw Development, and how to build climate-friendly design into new housing models.

Robert Yelton is a renowned carver and artist, best known for his work as lead visionary for the first Squamish totem pole to be placed in Stanley Park, Vancouver British Columbia. He has also worked extensively as a drug and alcohol counselor and is instrumental in maintaining and promoting traditional Squamish culture.

Leanne Betasamosake Simpson is a renowned Michi Saagiig Nishnaabeg musician, writer and academic, who has been widely recognized as one of the most compelling Indigenous voices of her generation. Her work breaks open the boundaries between story and song—bringing audiences into a rich and layered world of sound, light, and sovereign creativity. Leanne has performed in venues and festivals across Canada with her sister singer songwriter Ansley Simpson and guitarist Nick Ferrio. Leanne’s second album, f(l)light, was released in 2016 and is a haunting collection of story-songs that effortlessly interweave Simpson’s complex poetics and multi-layered stories of the land, spirit, and body with lush acoustic and electronic arrangements. Her EP Noopiming Sessions combines readings from her novel Noopiming with soundscapes composed and performed by Ansley Simpson and James Bunton with a gorgeous video by Sammy Chien and the Chimerik Collective. It was produced during the on-going social isolation of COVID-19 and was released on Gizhiiwe Music in the Fall of 2020. Leanne is the author of seven books, including This Accident of Being Lost, which won the MacEwan University Book of the Year; was a finalist for the Rogers Writers’ Trust Fiction Prize and the Trillium Book Award; was long listed for CBC Canada Reads; and was named a best book of the year by the Globe and Mail, the National Post, and Quill & Quire. Her new novel Noopiming: The Cure for White Ladies was released by the House of Anansi Press in the fall of 2020 and in the US by the University of Minnesota Press in 2021 and was named one of the Globe and Mail’s best books of the year and was short listed for the Governor General’s Literary Award for fiction. A Short History of the Blockade was released by the University of Alberta Press in early 2021. Her new project with Robyn Maynard,Rehearsals for Living will be released in 2022 by Knopf Canada. Her newest record, Theory Of Ice was released by You’ve Changed Records in the winter of 2021, and features the artistic brilliance of Ansley Simpson, Nick Ferrio, Jim Bryson, John K. Samson, Jonas Bonnetta and Sandra Brewster.