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An integrative taxonomy combining morphological and molecular data confirmed that both Macromia amphigena Selys, 1871 and M. manchurica Asahina, 1964 have been assigned to separate species hypotheses, although there is hybridization between the members of these taxa. Scientific names Macromia clio Ris, 1916 and Macromia kubokaiya Asahina, 1964 are shown to be junior synonyms of M.
View Article and Find Full Text PDFIncreased difficulty accessing food and income change during the COVID-19 pandemic among youth living in the eThekwini district, South Africa.
Public Health Nutr
May 2024
Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada.
Objective: To estimate the effect of income change on difficulty accessing food since the COVID-19 pandemic for South African youth and evaluate whether this effect was modified by receiving social grants.
Design: A cross-sectional, online survey was conducted between December 2021 and May 2022. Primary outcome was increased difficulty accessing food since the COVID-19 pandemic.
Females exhibit smaller volumes of brain activation and lower inter-subject variability during motor tasks.
Sci Rep
October 2023
Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, Canada.
Past work has shown that brain structure and function differ between females and males. Males have larger cortical and sub-cortical volume and surface area (both total and subregional), while females have greater cortical thickness in most brain regions. Functional differences are also reported in the literature, yet to date little work has systematically considered whether patterns of brain activity indexed with functional magnetic resonance imaging (fMRI) differ between females and males.
View Article and Find Full Text PDFWhere to live? Landfast sea ice shapes emperor penguin habitat around Antarctica.
Sci Adv
September 2023
Department of Earth and Environmental Science, University of Minnesota, Minneapolis, MN, USA.
Predicting species survival in the face of climate change requires understanding the drivers that influence their distribution. Emperor penguins () incubate and rear chicks on landfast sea ice, whose extent, dynamics, and quality are expected to vary substantially due to climate change. Until recently, this species' continent-wide observations were scarce, and knowledge on their distribution and habitat limited.
View Article and Find Full Text PDFAntarctic calving loss rivals ice-shelf thinning.
Nature
September 2022
Australian Antarctic Program Partnership, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia.
Antarctica's ice shelves help to control the flow of glacial ice as it drains into the ocean, meaning that the rate of global sea-level rise is subject to the structural integrity of these fragile, floating extensions of the ice sheet. Until now, data limitations have made it difficult to monitor the growth and retreat cycles of ice shelves on a large scale, and the full impact of recent calving-front changes on ice-shelf buttressing has not been understood. Here, by combining data from multiple optical and radar satellite sensors, we generate pan-Antarctic, spatially continuous coastlines at roughly annual resolution since 1997.
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