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Mechanisms of recalcitrant fucoidan breakdown in marine Planctomycetota.
Nat Commun
December 2024
AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), Sukarrieta, Spain.
Marine brown algae produce the highly recalcitrant polysaccharide fucoidan, contributing to long-term oceanic carbon storage and climate regulation. Fucoidan is degraded by specialized heterotrophic bacteria, which promote ecosystem function and global carbon turnover using largely uncharacterized mechanisms. Here, we isolate and study two Planctomycetota strains from the microbiome associated with the alga Fucus spiralis, which grow efficiently on chemically diverse fucoidans.
View Article and Find Full Text PDFEssential oil of (L.) ssp. (Apiaceae) flower: chemical composition, antimicrobial potential, and insecticidal activity on (L.).
Z Naturforsch C J Biosci
January 2025
Laboratory of Molecular Chemistry and Natural Substances, Faculty of Sciences of Meknes, 11201 Zitoune-Meknes B.P, Meknes, Meknes, Morocco.
In order to search for new chemotypes and to carry out a comparative study with the literature, the current study investigated the chemical composition of the essential oil of the flowers of (L.) ssp. using gas chromatography coupled with mass spectrometry (GC-MS).
View Article and Find Full Text PDFEnhanced Nonagricultural Emissions of Ammonia Influence Aerosol Ammonium in an Urban Atmosphere: Evidence from Kinetic Versus Equilibrium Isotope Fractionation Controls on Nitrogen.
Environ Sci Technol
December 2024
Key Laboratory of Atmospheric Environment and Extreme Meteorology, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Aerosol ammonium (NH) is a critical component of particulate matter that affects air pollution, climate, and human health. Isotope-based source apportionment of NH is essential for ammonia (NH) mitigation but the role of kinetic vs equilibrium controls on nitrogen isotope (δN) fractionation between NH and NH remains unresolved. Based on concurrent measurements of NH and NH in winter Beijing, we observed that the difference of δN between NH and NH on clean days (3.
View Article and Find Full Text PDFA Natural Disaster Exacerbates and Redistributes Disease Risk Among Free-Ranging Macaques by Altering Social Structure.
Ecol Lett
January 2025
Department of Cellular and Molecular Biology, Harvard University, Cambridge, Massachusetts, USA.
Climate change is intensifying extreme weather events, with severe implications for ecosystem dynamics. A key behavioural mechanism whereby animals may cope with such events is by altering their social structure, which in turn could influence epidemic risk. However, how and to what extent natural disasters affect disease risk via changes in sociality remains unexplored in animal populations.
View Article and Find Full Text PDFSeasonal Assembly of Nectar Microbial Communities Across Angiosperm Plant Species: Assessing Contributions of Climate and Plant Traits.
Ecol Lett
January 2025
Department of Entomology and Nematology, University of California, Davis, Davis, California, USA.
Plant-microbe associations are ubiquitous, but parsing contributions of dispersal, host filtering, competition and temperature on microbial community composition is challenging. Floral nectar-inhabiting microbes, which can influence flowering plant health and pollination, offer a tractable system to disentangle community assembly processes. We inoculated a synthetic community of yeasts and bacteria into nectars of 31 plant species while excluding pollinators.
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