3,939 research outputs found
Connections between climate, food limitation, and carbon cycling in abyssal sediment communities
No full textDiverse faunal groups inhabit deep-sea sediments over much of Earth's surface, but our understanding of how interannual-scale climate variation alters sediment community components and biogeochemical processes remains limited. The vast majority of deep-sea communities depend on a particulate organic carbon food supply that sinks from photosynthetically active surface waters. Variations in food supply depend, in part, on surface climate conditions. Proposed ocean iron fertilization efforts are also intended to alter surface production and carbon export from surface waters. Understanding the ecology of the abyssal sediment community and constituent metazoan macrofauna is important because they influence carbon and nutrient cycle processes at the seafloor through remineralization, bioturbation, and burial of the sunken material. Results from a 10-year study in the abyssal NE Pacific found that climate-driven variations in food availability were linked to total metazoan macrofauna abundance, phyla composition, rank-abundance distributions, and remineralization over seasonal and interannual scales. The long-term analysis suggests that broad biogeographic patterns in deep-sea macrofauna community structure can change over contemporary timescales with changes in surface ocean conditions and provides significant evidence that sediment community parameters can be estimated from atmospheric and upper-ocean conditions. These apparent links between climate, the upper ocean, and deep-sea biogeochemistry need to be considered in determining the long-term carbon storage capacity of the ocean
Jacob of Sarug's Homily on Tamar (Gen 38)
No full textThis small volume contains an edition (from Vatican ms. 117) of Jacob of Sarug’s homily on Tamar (420 lines long). The full title is “On Tamar and on the Mystery of the Church.” The biblical narrative on which the poem is based (Gen 38) gives Jacob the opportunity to discuss various women in the early part of biblical history and in Jesus’ lineage, as well as the fact that a woman who is called a prostitute is in that lineage. Jacob explains how Scripture’s language is used in this regard
Jacob of Serugh's Homilies on the Spectacles of the Theatre
No full textThis fascinating volume contains excerpts from four otherwise unedited (and untranslated) homilies from Jacob of Sarug on the theatre. These homilies, extant only in a single manuscript (BM Add. 17158), which is unfortunately poorly preserved, are unique for the light they cast on the Greek theatre in the Byzantine period. In this article, originally published in Le Muséon 48 (1935), Moss gives a substantive introduction to the selections presented from these homilies, and then presents the texts in Syriac and in English translation. Scholars and readers interested in Syriac literature, and in Jacob of Sarug in particular, as well as students of the history of the theatre, will find this work of great interest.Translated into English from the Syriac text
FIG. 3. — Tergivelum baldwinae n. gen., n in A new deep-sea species of epibenthic acorn worm (Hemichordata, Enteropneusta)
No full textFIG. 3. — Tergivelum baldwinae n. gen., n. sp. in approximate dorsal view: A, surface details; B, locations of major nerves and muscles associated with proboscis and collar. Abbreviations for structural features: see text.Published as part of Holland, Nicholas D., Jones, William J., Ellena, Jacob, Ruhl, Henry A. & Smith Jr, Kenneth L., 2009, A new deep-sea species of epibenthic acorn worm (Hemichordata, Enteropneusta), pp. 333-346 in Zoosystema 31 (2) on page 339, DOI: 10.5252/z2009n2a6, http://zenodo.org/record/539594
Seabird aggregation around free-drifting icebergs in the northwest Weddell and Scotia Seas
No full textSeabird abundances and distributions can be influenced by seasonal variations in surface productivity, winds, and other environmental factors. Recently evidence emerged that free-drifting icebergs were hotspots of biogeochemical and ecological activity. They also represent physical habitat structure both above and below the sea surface. Here we found seabird abundances that were 2 to 6 times greater within about one-half km of free drifting icebergs than the area between about one-half and one km from the iceberg edge. Aggregation was measured by surveys with an experimental design for determining potential local impacts of free-drifting icebergs on seabird density. Seabird surveys were conducted during three cruises in the Weddell Sea from 4 to 20 December 2005, 11 to 25 June 2008, and 21 March to 2 April 2009. Visual surveys were done on the vessel bridge typically for periods of five minutes facing the port or starboard side. Differences in species composition were also linked to distance from the iceberg edge for the most sampled icebergs with Daption capense exhibiting change in relative abundance. On a local scale, environmental factors such as surface productivity, air temperature, and winds were not consistently related to seabird distributions and community dynamics. The results suggest that climatically-driven variations in iceberg abundance would influence local seabird distributions with unknown impacts on regional abundances and species composition
Jacob Viner’s Reminiscences from the New Deal (February 11, 1953)
No full textThis paper presents and reproduces an unpublished oral history interview given by Jacob Viner in 1953. The interview released by Viner for the Columbia Oral History Project gives us a valuable opportunity to throw light on his advisory activity during the New Deal Era. In our introduction we attempt to make a critical appraisal of Viner's reminiscences and to state the contribution they can provide to our general knowledge of the period. In addition, we also attempt to find out some biographical and interpretative elements useful to understand Viner’s own vision and his contribution to important economic policy processes during the New Deal.
A new deep-sea species of epibenthic acorn worm (Hemichordata, Enteropneusta)
No full textIndividuals of an enteropneust, Tergivelum baldwinae n. gen., n. sp. were videotaped at a depth of about 4 km in the eastern Pacific and collected by a remotely operated vehicle. The living worms range in length from 9 to 28 cm and are dark brown anteriorly and beige posteriorly. The proboscis is shaped like a shallow dome, indented on either side by a laterodorsal fossa housing a prominent proboscis nerve. The collar comprises a thin transverse crest dorsally and two laterally projecting lips on either side of the mouth ventrally. The mouth is oriented parallel to the substratum and is flanked by large left and right buccal muscles (contrasting with the rudimentary musculature elsewhere in the body). The respiratory pharynx of the trunk extends far anteriorly so that much of it lies dorsal to the mouth opening. The gill bars are not joined by synapticles. The laterodorsal body wall at the anterior extremity of the trunk
extends as two conspicuous flaps (back veils) that run posteriorly as unattached coverings over the anterior 30-50% of the trunk. On either side of the midline, the body wall of the trunk is extended as a narrow lateroventral fold. Within the trunk runs the intestine, which lacks hepatic sacculations and opens at an
anus at the posterior end of the body. Frame analysis of videotapes suggests that the worm can secrete a mass of mucus around the body to facilitate demersal drifting from one epibenthic foraging site to the next. We include a preliminary phylogenetic analysis based on rDNA sequences from T. baldwinae n. gen., n. sp. and additional deep-sea enteropneusts not yet formally described taxonomically (sequence data place them unexpectedly close to ptychoderids). Until more is known about the group as a whole, it is prudent to leave family level classification of T. baldwinae n. gen., n. sp. as incertae sedis
Jacob of Serugh on the Eucharist: Homilies 22 and 95
No full textIn the two articles reprinted here, Dom Hugh Connolly offers an English translation of two homilies from Jacob of Serugh dealing with the Eucharist. Connolly used the Syriac text of Bedjan’s edition of Jacob’s homilies (also available from Gorgias Press), homilies 22 and 95 in that edition. A short selection from homily 53 is also translated because of its related subject matter. Connolly gives an introduction to each homily and includes some explanatory notes to the texts. These translations originally appeared in The Downside Review, nos. 27 (1908) and 29 (1910).Translated into English from the Syriac text of Bedjan’s edition of Jacob’s homilies.These translations originally appeared in The Downside Review, nos. 27 (1908) and 29 (1910)
Correspondence from Jacob C. Kellem to Daniel R. Porter, 1973
No full textThe sender, Jacob C. Kellem, disagrees with the opinion expressed and provides reasoning based on Condition 2 of the loan agreement between the Ohio Historical Society and Ms. Pauline A. Young. Condition 2 stipulates that Ms. Young retains all literary rights to the papers. The letter asserts that the society failed in its duty to prevent the public, including those ordering single copies, from violating these rights. Jacob C. Kellem seeks prompt advice on compensation and prevention of future violations. The letter also mentions the potential modification of the existing agreement and Ms. Young's intent to stand firm on her rights while considering a reasonable compromise. The sender requests clarity on whether further legal action will be necessary to uphold Ms. Young's rights
Jacob Elry Metzger papers
No full textJacob E. Metzger came to the Maryland Agricultural College in 1914. He was a professor of agronomy and head of the Department of Agronomy, supervisor of the Agricultural Department of the Maryland High Schools for the State Department of Public Instruction, Agronomist of the Maryland Experiment Station, and acting director and director of the Maryland Agricultural Experiment Station from 1937 to 1939. Metzger also established and directed the university's first summer school in 1914. Metzger took part in research and experiments which led to development of "beardless" barley, conducted research on a special type of turf grass for golf courses, and was a noted author of bulletins and articles on soil research and other related fields. His papers consist of speeches, research papers, and recollections on subjects related to his career. Topics include agriculture in Maryland, agricultural education in college and secondary schools, alfalfa, soils, and corn production in Maryland
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