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981.
Morales-Molino César Steffen Marianne Samartin Stéphanie van Leeuwen Jaqueline F. N. Hürlimann Daniel Vescovi Elisa Tinner Willy 《Ecosystems》2021,24(6):1361-1377
Ecosystems - Fagus sylvatica (beech) dominates the montane forests of the Apennines and builds old-growth high-conservation value stands. However, recent severe drought-induced diebacks raise... 相似文献
982.
Emily B. Cohen Kyle G. Horton Peter P. Marra Hannah L. Clipp Andrew Farnsworth Jaclyn A. Smolinsky Daniel Sheldon Jeffrey J. Buler 《Ecology letters》2021,24(1):38-49
Migrating birds require en route habitats to rest and refuel. Yet, habitat use has never been integrated with passage to understand the factors that determine where and when birds stopover during spring and autumn migration. Here, we introduce the stopover‐to‐passage ratio (SPR), the percentage of passage migrants that stop in an area, and use 8 years of data from 12 weather surveillance radars to estimate over 50% SPR during spring and autumn through the Gulf of Mexico and Atlantic coasts of the south‐eastern US, the most prominent corridor for North America’s migratory birds. During stopovers, birds concentrated close to the coast during spring and inland in forested landscapes during autumn, suggesting seasonal differences in habitat function and highlighting the vital role of stopover habitats in sustaining migratory communities. Beyond advancing understanding of migration ecology, SPR will facilitate conservation through identification of sites that are disproportionally selected for stopover by migrating birds. 相似文献
983.
984.
Ibarra-López Alejandro Ojeda-Zacarías Ma. del Carmen Lozoya-Saldaña Héctor Vázquez-Alvarado Rigoberto E. Olivares-Sáenz Emilio Treviño-Ramírez José E. 《In vitro cellular & developmental biology. Plant》2021,57(6):942-953
In Vitro Cellular & Developmental Biology - Plant - Texas ebony (Ebenopsis ebano [Berland.] Barneby & J.W. Grimes) is a member of the Fabaceae that is native to Mexico. Its wood has... 相似文献
985.
986.
987.
Alícia Martinez-Varela Elena Cerro-Gálvez Adrià Auladell Shalabh Sharma Mary Ann Moran Ronald P. Kiene Benjamí Piña Jordi Dachs Maria Vila-Costa 《Environmental microbiology》2021,23(8):4532-4546
Thousands of man-made synthetic chemicals are released to oceans and compose the anthropogenic dissolved organic carbon (ADOC). Little is known about the effects of this chronic pollution on marine microbiome activities. In this study, we measured the pollution level at three sites in the Northeast Subarctic Pacific Ocean (NESAP) and investigated how mixtures of three model families of ADOC at different environmentally relevant concentrations affected naturally occurring marine bacterioplankton communities' structure and metabolic functioning. The offshore northernmost site (North) had the lowest concentrations of hydrocarbons, as well as organophosphate ester plasticizers, contrasting with the two other continental shelf sites, the southern coastal site (South) being the most contaminated. At North, ADOC stimulated bacterial growth and promoted an increase in the contribution of some Gammaproteobacteria groups (e.g. Alteromonadales) to the 16 rRNA pool. These groups are described as fast responders after oil spills. In contrast, minor changes in South microbiome activities were observed. Gene expression profiles at Central showed the coexistence of ADOC degradation and stress-response strategies to cope with ADOC toxicities. These results show that marine microbial communities at three distinct domains in NESAP are influenced by background concentrations of ADOC, expanding previous assessments for polar and temperate waters. 相似文献
988.
Mª Dolores Ramos-Barbero Tomeu Viver Ane Zabaleta Ece Senel María Gomariz Iñaki Antigüedad Fernando Santos Manuel Martínez-García Ramon Rosselló-Móra Josefa Antón 《Environmental microbiology》2021,23(7):3477-3498
Microbial communities in hypersaline underground waters derive from ancient organisms trapped within the evaporitic salt crystals and are part of the poorly known subterranean biosphere. Here, we characterized the viral and prokaryotic assemblages present in the hypersaline springs that dissolve Triassic-Keuper evaporite rocks and feed the Añana Salt Valley (Araba/Alava, Basque Country, Spain). Four underground water samples (around 23% total salinity) with different levels of exposure to the open air were analysed by means of microscopy and metagenomics. Cells and viruses in the spring water had lower concentrations than what are normally found in hypersaline environments and seemed to be mostly inactive. Upon exposure to the open air, there was an increase in activity of both cells and viruses as well as a selection of phylotypes. The underground water was inhabited by a rich community harbouring a diverse set of genes coding for retinal binding proteins. A total of 35 viral contigs from 15 to 104 kb, representing partial or total viral genomes, were assembled and their evolutionary changes through the spring system were followed by SNP analysis and metagenomic island tracking. Overall, both the viral and the prokaryotic assemblages changed quickly upon exposure to the open air conditions. 相似文献
989.
Joseana Vieira Flávia Cristina de Paula Freitas Alexandre Santos Cristino Daniel Guariz Pinheiro Luiz Roberto Aguiar Marcela Aparecida Framartino Bezerra Laure Lívia Maria Rosatto Moda Zilá Luz Paulino Simões Angel Roberto Barchuk 《Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms》2021,1864(9):194732
Brain differential morphogenesis in females is one of the major phenotypic manifestations of caste development in honey bees. Brain diphenism appears at the fourth larval phase as a result of the differential feeding regime developing females are submitted during early phases of larval development. Here, we used a forward genetics approach to test the early brain molecular response to differential feeding leading to the brain diphenism observed at later developmental phases. Using RNA sequencing analysis, we identified 53 differentially expressed genes (DEGs) between the brains of queens and workers at the third larval phase. Since miRNAs have been suggested to play a role in caste differentiation after horizontal and vertical transmission, we tested their potential participation in regulating the DEGs. The miRNA-mRNA interaction network, including the DEGs and the royal- and worker-jelly enriched miRNA populations, revealed a subset of miRNAs potentially involved in regulating the expression of DEGs. The interaction of miR-34, miR-210, and miR-317 with Takeout, Neurotrophin-1, Forked, and Masquerade genes was experimentally confirmed using a luciferase reporter system. Taken together, our results reconstruct the regulatory network that governs the development of the early brain diphenism in honey bees. 相似文献
990.