The risk that locally successful nature conservation may be shifting problems elsewhere can no longer be ignored.
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Photogrammetric assessment of quagga mussel growth shows no winter cessation in lake Geneva.
Sci Rep
March 2025
Université Savoie Mont Blanc, INRAE, CARRTEL, 75 bis avenue de Corzent, 74203, Thonon-les-Bains, France.
The quagga mussel (Dreissena rostriformis bugensis) is an invasive alien species present in many aquatic ecosystems. Although this species is known for its ecological and economic impacts, there are still significant gaps in our knowledge of its ecophysiology. This is particularly true when its growth rate under natural conditions is considered.
View Article and Find Full Text PDFMigrating baleen whales transport high-latitude nutrients to tropical and subtropical ecosystems.
Nat Commun
March 2025
Climate Central Inc., Princeton, NJ, USA.
Baleen whales migrate from productive high-latitude feeding grounds to usually oligotrophic tropical and subtropical reproductive winter grounds, translocating limiting nutrients across ecosystem boundaries in their bodies. Here, we estimate the latitudinal movement of nutrients through carcasses, placentas, and urea for four species of baleen whales that exhibit clear annual migration, relying on spatial data from publicly available databases, present and past populations, and measurements of protein catabolism and other sources of nitrogen from baleen whales and other marine mammals. Migrating gray, humpback, and North Atlantic and southern right whales convey an estimated 3784 tons N yr and 46,512 tons of biomass yr to winter grounds, a flux also known as the "great whale conveyor belt"; these numbers might have been three times higher before commercial whaling.
View Article and Find Full Text PDFNegative effects of nitrogen fertilization on herbivore fitness are exaggerated at warmer temperatures and in high-altitude populations.
Oecologia
March 2025
Department of Biology, Institute for Integrated Natural Sciences, University of Koblenz, Universitätsstraße 1, 56070, Koblenz, Germany.
Biodiversity is currently under strong pressure due to anthropogenic global change. Different drivers of global change may exert direct and indirect effects on biodiversity, and may furthermore interact with one another, but our respective knowledge is still very limited. We investigated indirect and interactive effects of two important drivers of global change, eutrophication and climate change, in replicated low- and high-altitude populations of an insect herbivore, the butterfly Lycaena tityrus, in a laboratory setting.
View Article and Find Full Text PDFQuantifying compositional variability in microbial communities with FAVA.
Proc Natl Acad Sci U S A
March 2025
Department of Biology, Stanford University, Stanford, CA 94305.
Microbial communities vary across space, time, and individual hosts, generating a need for statistical methods capable of quantifying variability across multiple microbiome samples at once. To understand heterogeneity across microbiome samples from different host individuals, sampling times, spatial locations, or experimental replicates, we present FAVA (-based Assessment of Variability across vectors of relative Abundances), a framework for characterizing compositional variability across two or more microbiome samples. FAVA quantifies variability across many samples of taxonomic or functional relative abundances in a single index ranging between 0 and 1, equaling 0 when all samples are identical and 1 when each sample is entirely composed of a single taxon (and at least two distinct taxa are present across samples).
View Article and Find Full Text PDFImpact of barriers on Cyrno-Sardinian endemisms: A comparative study of population genetics and phylogeography within taxa of Centranthus sect. Nervosae (Caprifoliaceae).
Plant Biol (Stuttg)
March 2025
Department of Biology, University of Naples Federico II, Naples, Italy.
This study explores the impact of geographic barriers on the distribution and survival of Mediterranean endemic species, focusing on Centranthus sect. Nervosae, a tetraploid species complex found in Corsica and Sardinia. The aim is to analyse how these barriers influence genetic diversity, population structure, and phylogeographic pattern, thereby impacting conservation strategies and future resilience of the selected study species.
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