23,101 research outputs found
Larval responses to turbulence and temperature in a tidal inlet: Habitat selection by dispersing gastropods?
Get PDFAuthor Posting. © Sears Foundation for Marine Research, 2010. This article is posted here by permission of Sears Foundation for Marine Research for personal use, not for redistribution. The definitive version was published in Journal of Marine Research 68 (2010): 153-188, doi:10.1357/002224010793079013.Marine larval dispersal is affected by hydrodynamic transport and larval behavior, but little is known about how behavior affects large-scale patterns of dispersal and recruitment. Intertidal habitats are characterized by strong and variable turbulence relative to shelf and pelagic waters, so larval responses to turbulence may affect both dispersal and habitat selection. This study combined observations and theoretical approaches to model gastropod larval responses to multiple physical variables in a well-mixed tidal inlet. Physical measurements and larvae were collected in July 2004 in Barnstable Harbor, Massachusetts (USA). Physical measurements were incorporated in an advection-diffusion model where larval vertical velocity is a function of turbulence dissipation rate, temperature, and the temperature gradient. Modeled larval distributions were fitted to observed concentration profiles by maximum likelihood to estimate larval behavioral velocity (swimming or sinking) as a function of environmental conditions. These quantitative behavior estimates were used to test hypotheses about behavioral differences among groups and to assess the relative impact of different cues on overall larval behavior. Larvae of five common gastropod species from different coastal habitats reacted most strongly to turbulence but had genus-specific responses to environmental cues. Larvae of a species from tidal inlets (the mud snail Nassarius obsoletus) had near-zero velocities under calmer conditions and sank in strong turbulence. In contrast, larvae from exposed beach habitats (Crepidula spp. and Anachis spp.) sank in weak turbulence and swam up in strong turbulence, with additional responses to temperature and temperature gradient. Larval responses also differed between small and large size classes and between flood and ebb tides. Behavior of mud snail larvae would contribute to retention inside the inlet and near adult habitats, whereas behavior of beach snail larvae would contribute to rapid export from muddy inlets lacking suitable adult habitats.This work was funded by the Woods Hole Oceanographic Institution (WHOI) Coastal Ocean
Institute, the WHOI Rinehart Coastal Research Center, the National Science Foundation (NSF OCE-
0326734), NSF and US Office of Naval Research grants to S. Elgar and B. Raubenheimer, and the
WHOI Sea Grant (National Oceanic and Atmospheric Administration, Grant No. NA16RG2273,
project no. R/O-38-PD). Analyses were completed while HLF was a postdoctoral scholar at Scripps
Institution of Oceanography (SIO), supported by the California Current Ecosystem Long-Term Ecological
Research program (NSF OCE-0417616) and by SIO funding to P. Franks
jonas-fuchs/virHEAT: v.0.7
No full text<h2>Update virHEAT to 0.7</h2>
<h4>New</h4>
<ul>
<li>added <code>-s --scores</code> option that lets you link results from <a href="https://mavedb.org/">deep mutational screens</a> to the heatmap</li>
<li>added some more error catching</li>
<li>added MAVE example data</li>
<li>updated documentation</li>
</ul>
<p></p>
<h2>New Contributors</h2>
<ul>
<li>@PlushZ made their first contribution in https://github.com/jonas-fuchs/virHEAT/pull/13
Thanks a lot! :100:</li>
</ul>
<p><strong>Full Changelog</strong>: https://github.com/jonas-fuchs/virHEAT/compare/v.0.6...v.0.7</p>
Egidius Tschudi's von Glarus Leben und Schriften nach dessen eigenen Handschriften diplomatisch verfasst und mit Urkunden belegt
No full textvon Ildephons Fuchs ...Bindungsfehler Theil 1: S. 15/16 ist zwischen S. 2 und 3 eingebundenTitelvignette.Exlibrisetikette: "Leih-Bibliothek, von F. M. Lutiger, Buchbinder in Zug. 004212479_0001 Exemplar der ETH-BIB, Rar 27473Exlibrisstempel: "Eidgenössische Zentralbibliothek" 004055914_0001 Exemplar der ETH-BIB, Rar 2747
Egidius Tschudi's von Glarus Leben und Schriften nach dessen eigenen Handschriften diplomatisch verfasst und mit Urkunden belegt
No full textvon Ildephons Fuchs ...Bindungsfehler Theil 1: S. 15/16 ist zwischen S. 2 und 3 eingebundenTitelvignette.Exlibrisetikette: "Leih-Bibliothek, von F. M. Lutiger, Buchbinder in Zug. 004212479_0001 Exemplar der ETH-BIB, Rar 27473Exlibrisstempel: "Eidgenössische Zentralbibliothek" 004055914_0001 Exemplar der ETH-BIB, Rar 2747
Frieda Fuchs Collection 1907-1957
No full textThe collection contains materials representing the academic career of Frieda Fuchs, from her early school years, through her doctoral studies and research into psychology in Germany, to her career in the United States. The following material is from her earlier years in Germany: grade certificates from the Grossherzogliche Seminar für Volksschullehrerinnen in Darmstadt indicating good marks (1907-1914); her teaching contract for the Israelitische Volksschule (1916), certificates confirming satisfactory studies and a diploma granting a doctoral degree from the Universtät Frankfurt am Main, in recognition of her dissertation "Experimentelle Studien über das Bewegungsnachbild" (1927-1928). The following material is from either shortly before or after her emigration to the United States: editions of her curriculum vitae (1940-1941); letters of recommendation, job correspondence and offers (1939-1942), report entitled "Von Nachbildern und ihrer Bedeutung," undated. Also included is an offprint, signed by the author, Dr. S. Hirsch, entitled "Die letzten Millimeter der arteriellen Strombahn," and two photographs of Frieda Fuchs approximately ages 30 and 50.Frieda Fuchs was born in Dieburg in 1893. She studied at the teacher's college in Darmstadt and the University in Frankfurt, receiving her doctoral degree in in 1928. From 1914 through 1940 she taught at the Israelitische Volksschule in Frankfurt am Main. She also gave classes at the Heim des Juedischen Frauenbundes in Neu-Isenburg. She immigrated to the United States in 1940 and found employment with the congregation of Rabbi Dr. Breuer in New York. At the same time she enlisted the support of the American Psychological Association Committee on Displayed Foreign Psychologists. She died in New York in 1974.Processed for digitizationdigitized2007110
Mussel larval responses to turbulence are unaltered by larvalage or light condition
No full textLarval responses to hydromechanical cues potentially have important effects on larval dispersal and settlement. This study examined the behavior of mussel larvae (Mytilus edulis) in laboratory-generated turbulence representative of nearshore currents. We video recorded the behavior of early- and late-stage veligers in a grid-stirred tank at five turbulence levels under light and dark conditions. Water velocities and kinetic energy dissipation rates were measured using particle image velocimetry and acoustic Doppler velocimetry. We characterized the vertical velocity distributions for sinking, hovering, and swimming modes in still water and calculated the average larval behavioral velocity in turbulence. In still water, young larvae had more positive (upward) velocities than old larvae, and both stages had more positive velocities in light than in dark. In turbulence, the mean larval vertical velocity varied from positive at low dissipation rates to negative at dissipation rates above a threshold of 8.3 £ 1022 cm2 s23. At this threshold, the Kolmogorov length scale (h ¼ 590mm) was two to three times the mean larval shell lengths (171–256mm), implying that turbulence is detectable even by larvae that are smaller than the smallest eddies. Responses to turbulence were unaffected by larval age or light conditions and contributed substantial behavioral variation. By sinking in strong turbulence, mussel larvae could increase their flux to the bed in energetic coastal flows, particularly over rough substrates like mussel beds. The response to turbulence by early-stage larvae will also affect their dispersal and may help larvae remain near coastal populations.Peer reviewedOriginally published in Limnology and Oceanography: Fluids & Environments (2011) and available via this link: http://lofe.dukejournals.org/content/1/120.full.pdfCopyright 2011 by the Association for the Sciences of Limnology and Oceanography, Inc
Plankton community properties determined by nutrients and size-selective feeding
No full textThe potential impacts of climate change on marine planktonic ecosystems remain difficult to predict. Climate forcing can alter nutrient availability and predator community composition, and here we show that these shifts may dramatically alter plankton trophic structure, size distributions and biomass. We modeled phytoplankton and zooplankton as a highly resolved size spectrum with size-dependent nutrient uptake and predation and analyzed the model both as a size spectrum and as a food web. Model results identified 2 distinct regimes defined by the average zooplankton feeding preferences. Regime I communities, where planktonic predators are specialists or large relative to prey, had low omnivory, many top predators, low connectance and relatively flat size spectra. Regime II communities, where predators are generalists or small relative to prey, had a high degree of omnivory, no top predators, high connectance and steep size spectra. Model ecosystems with generalist predators had lower size diversity, smaller plankton and gappier size distributions than ecosystems with specialist predators. Nutrient availability had little influence on trophic structure but strongly impacted size structure and biomass. Most surprisingly, phytoplankton biomass sometimes decreased with added nutrients if predators were small relative to prey, implying that both predators and nutrients mediate shifts between bottom-up and top-down control. Based on our synthesized estimates of size-selective feeding parameters, we infer that size and trophic structure should be strongly affected by abundances of generalist, bloom-forming taxa such as salps and jellyfish, many of which are responsive to ocean temperature. Size-selective feeding fundamentally affects community structure and is a likely mechanism of change in planktonic ecosystems where community composition varies with temperature.Article accompanied by supplement (13 p.): Plankton community properties determined by nutrients and size-selective feedingPeer reviewe
Notice biographique sur Jean-Chrysostome-Wolfgang-Théophile Mozart
No full text[Verf.:] WincklerAus: Magasin Encyclopédique, année VII, 1801, t. 3, S. 29Vorlageform des Erscheinungsvermerks: A Paris, Chez J. J. Fuchs, libraire, rue des Mathurins, n.° 334. An X -180
Fuchs endothelial corneal dystrophy: current perspectives
No full textGustavo Vedana, Guadalupe Villarreal Jr, Albert S Jun Wilmer Eye Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA Abstract: Fuchs endothelial corneal dystrophy (FECD) is the most common corneal dystrophy and frequently results in vision loss. Hallmarks of the disease include loss of corneal endothelial cells and formation of excrescences of Descemet’s membrane. Later stages involve all layers of the cornea. Impairment of endothelial barrier and pump function and cell death from oxidative and unfolded protein stress contribute to disease progression. The genetic basis of FECD includes numerous genes and chromosomal loci, although alterations in the transcription factor 4 gene are associated with the majority of cases. Definitive treatment of FECD is corneal transplantation. In this paper, we highlight advances that have been made in understanding FECD’s clinical features, pathophysiology, and genetics. We also discuss recent advances in endothelial keratoplasty and potential future treatments. Keywords: Fuchs endothelial corneal dystrophy, corneal endothelial cell, corneal transplantation, Descemet’s stripping automated endothelial keratoplasty, Descemet’s membrane endothelial keratoplasty, endothelial keratoplast
Des berühmten Gottesgelahrten Herrn D. I. Franc. Buddei zu Jena kurtz vor seinem seligen Tode gehaltenes @Collegium oder Colloquium Privatissimum über neun und neuntzig demselben von einigen seiner vertrautesten und gelehrtesten Zuhörern vorgelegte insonderheit aber einige Zinzendorfische Sätze und Anstalten betreffende Fragen : Wie solche auf das getreulichste von einem Zuhörer desselben aus seinem Munde nachgeschrieben worden
No full textPaginierfehler: S.5 falsch als S.6 gezähl
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