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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Climatic change 4 (1982), S. 419-426 
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Carbon-14 production rate variations that are not explainable by geomagnetic changes are thought to be in antiphase with solar activity and as such should be in antiphase with paleotemperature records or proxy temperature histories such as those obtainable from oxygen isotope analyses of ice cores. Oxygen isotope records from Camp Century, Greenland and Devon Island Ice Cap are in phase with each other over thousands of years and in antiphase to the 14C production rate residuals.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5117
    Keywords: dissolved DNA ; oligotrophic and eutrophic rivers ; dissolved organic carbon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The distribution of dissolved DNA concentrations and some microbial variables were compared in an oligo-mesotrophic river (the Crystal River) and a phosphate-rich eutrophic river (the Alafia River) in Southwest Florida over a 15 month period. Concentrations of phosphate and nitrate in the Alafia River averaged 135 and 18.2 times the respective phosphate and nitrate concentrations of the oligo-mesotrophic Crystal River. The seasonal average dissolved DNA concentration for the Alafia River exceeded that of the Crystal River by a factor of 1.8 (8.2 μg 1−1 compared to 4.6 μg 1−1, respectively). The greatest concentrations of dissolved DNA in the Alafia River were found in areas that contained the largest populations of phytoplankton and bacteria (a reservoir formed from an abandoned phosphate mining pit and two downstream stations near the mouth of the river). Differences in dissolved DNA concentrations between these environments and more pristine environments (i.e. all Crystal River Stations and upstream Alafia River stations) were of the same order of magnitude (1.8 to 2.2-fold) as the differences in bacterial abundance and activity, but considerably less than differences in phytoplankton abundance and activity between such environments. Seasonal variations in dissolved DNA concentrations in the Crystal River corresponded to seasonal variations in microbial populations, with minimal values in January and greater values in July. In the Alafia River, lowest concentrations for dissolved DNA occurred in July during the wet season, when seasonal flooding of area of leaf litter yielded high levels of dissolved organic carbon (DOC) which were low in dissolved DNA. These results suggest that: 1) in situ planktonic activity is a greater source of dissolved DNA than allochthonous or terrestrial sources of DOC; 2) factors that control the magnitude of heterotrophic bacterial populations are more likely to control dissolved DNA levels than factors regulating autotrophic population activity and abundance; 3) differences in dissolved DNA between eutrophic and oligo-mesotrophic environments are often much smaller than the differences in nutrient concentration between such environments.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Climatic change 4 (1982), S. 419-426 
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Carbon-14 production rate variations that are not explainable by geomagnetic changes are thought to be in antiphase with solar activity and as such should be in antiphase with paleotemperature records or proxy temperature histories such as those obtainable from oxygen isotope analyses of ice cores. Oxygen isotope records from Camp Century, Greenland and Devon Island Ice Cap are in phase with each other over thousands of years and in antiphase to the14C production rate residuals.
    Type of Medium: Electronic Resource
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  • 4
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    University of Washington Press | University of Washington Press
    Publication Date: 2024-04-04
    Description: When American forces arrived in Vietnam, they found themselves embedded in historical village and frontier spaces already shaped by past conflicts. American bases and bombing targets followed spatial and political logics influenced by the footprints of previous wars in central Vietnam, and these militarized landscapes continue to shape postwar land-use politics. Footprints of War traces the long history of conflict-produced spaces in Vietnam, beginning with early modern wars and the French colonial invasion in 1885 and continuing through the collapse of the Saigon government in 1975. Drawing on extensive archival research and years of interviews and fieldwork in the hills and villages around the city of Huế, David Biggs integrates historical geographic information system (GIS) data and uses aerial, high-altitude, and satellite imagery to render otherwise inscrutable sites as living, multidimensional spaces. This personal and multilayered approach yields an innovative history of the lasting traces of war in Vietnam and a model for understanding other militarized landscapes. ; When American forces arrived in Vietnam, they found themselves embedded in historic village and frontier spaces already shaped by many past conflicts. American bases and bombing targets followed spatial and political logics influenced by the footprints of past wars in central Vietnam. The militarized landscapes here, like many in the world’s historic conflict zones, continue to shape post-war land-use politics. Footprints of War traces the long history of conflict-produced spaces in Vietnam, beginning with early modern wars and the French colonial invasion in 1885 and continuing through the collapse of the Saigon government in 1975. The result is a richly textured history of militarized landscapes that reveals the spatial logic of key battles such as the Tet Offensive. Drawing on extensive archival work and years of interviews and fieldwork in the hills and villages around the city of Hue to illuminate war’s footprints, David Biggs also integrates historical Geographic Information Systems (GIS) data, using aerial, high-altitude, and satellite imagery to render otherwise placeless sites into living, multidimensional spaces. This personal and multilayered approach yields an innovative history of the lasting traces of war in Vietnam and a model for understanding other militarized landscapes. For more information visit the author's website: http://davidbiggs.net/
    Keywords: Military history: post-WW2 conflicts ; Asian history ; Environmental policy and protocols ; thema EDItEUR::N History and Archaeology::NH History::NHW Military history::NHWR Specific wars and campaigns::NHWR9 Military history: post-WW2 conflicts ; thema EDItEUR::N History and Archaeology::NH History::NHW Military history::NHWL Modern warfare ; thema EDItEUR::N History and Archaeology::NH History::NHF Asian history ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RND Environmental policy and protocols
    Language: English
    Format: image/png
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  • 5
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    University of Washington Press
    Publication Date: 2024-04-04
    Description: When American forces arrived in Vietnam, they found themselves embedded in historic village and frontier spaces already shaped by many past conflicts. American bases and bombing targets followed spatial and political logics influenced by the footprints of past wars in central Vietnam. The militarized landscapes here, like many in the world's historic conflict zones, continue to shape post-war land-use politics.Footprints of War traces the long history of conflict-produced spaces in Vietnam, beginning with early modern wars and the French colonial invasion in 1885 and continuing through the collapse of the Saigon government in 1975. The result is a richly textured history of militarized landscapes that reveals the spatial logic of key battles such as the Tet Offensive.Drawing on extensive archival work and years of interviews and fieldwork in the hills and villages around the city of Hue to illuminate war's footprints, David Biggs also integrates historical Geographic Information Systems (GIS) data, using aerial, high-altitude, and satellite imagery to render otherwise placeless sites into living, multidimensional spaces. This personal and multilayered approach yields an innovative history of the lasting traces of war in Vietnam and a model for understanding other militarized landscapes.
    Keywords: Military history: post-WW2 conflicts ; thema EDItEUR::N History and Archaeology::NH History::NHW Military history::NHWR Specific wars and campaigns::NHWR9 Military history: post-WW2 conflicts ; thema EDItEUR::N History and Archaeology::NH History::NHW Military history::NHWL Modern warfare
    Language: English
    Format: image/jpeg
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  • 6
    Publication Date: 2021-05-19
    Description: A joint Cuba-U.S. expedition was conducted May 14-June 12, 2017 to characterize for the first time the extent and health of mesophotic coral ecosystems (MCEs) along the entire coastline of Cuba. Remotely Operated Vehicle (ROV) dives at 36 sites confirmed the presence of MCE habitat along all coasts of Cuba. ROV dives covered 27 km, at depths of 25-188 m, and documented habitat and species with 103 hours of high-definition video and 21,146 digital images. A total of 477 taxa of benthic macrobiota and 178 fish taxa were identified, and 343 specimens of benthic invertebrates and algae were collected to verify taxonomy and assess population genetic structure. The pri- mary geomorphological features were the Deep Island Slope (125-〉150 m), Deep Fore Reef Escarpment (the ‘Wall’, 50-125 m), and Deep Fore-Reef Slope (30-50 m). Most vertical surfaces of the Wall were covered with dense sponges, algae, octocorals, and black corals. Agaricia was the most abundant scleractinian genus on the Wall at depths of 50-75 m, and was observed to 122 m. Of the 2,240 scleractinian colonies that were counted in this study, only 12 corals (0.53%, mainly Agaricia spp.) showed signs of bleaching, and one Agaricia had black band disease, comprising remarkably low disease prevalence. The most frequently recorded sponge genera were Xestospon- gia, Aplysina, and Agelas. At least 10 previously unknown sponge species were collected during the expedition. Sites outside of marine protected areas generally had lower fish abundances, a possible indicator of historical overfishing. Lionfish were observed at most sites but abundances were low compared to other Caribbean regions.
    Description: Entre el 14 de mayo y el 12 de junio de 2017 se llevó a cabo una expedición conjunta entre Cuba y EEUU. El objetivo fue mapear y caracterizar, por primera vez, la extensión y salud de los arrecifes de coral mesofóticos (MCE, por sus siglas en inglés) alrededor de las costas de Cuba. 43 inmersiones con un vehículo operado por remoto (ROV, por sus siglas en inglés) en 36 sitios, confirmaron la presencia de arrecifes mesofóticos a lo largo de toda la línea costera cubana. Las inmersiones del ROV desde 25 a 188 m de profundidad abarcaron, en total, 27 km, y se documentaron hábitats y especies con 103 horas de videos de alta definición y 21,146 imágenes digitales. Un total de 477 taxa de macrobiota bentónica y 178 taxa de peces fueron identificados. Se recolectaron 343 especímenes de invertebrados bentónicos y algas para verificaciones taxonómicas y eva- luación de estructura de poblaciones. Los zo- nas geomorfológicas más prominentes fueron: Pendiente profunda (125- 〉150 m), Escarpe profundo del arrecife frontal (la “pared”, 50- 125 m), y arrecife de franja profundo (30-50 m). La pared presentó la mayor diversidad y densidad de la macrobiota; todas las superficies verticales estuvieron cubiertas por diversidad de esponjas, algas, gorgonias y coral negro. Agaricia fue el género más abundante de escle- ractíneos y dominó a profundidades entre 40- 75 m. Solo 12 colonias de corales escleractíneos (principalmente Agaricia spp.) de 2,240 colo- nias (0,53%) registradas con el ROV mostraron signos de blanqueamiento, y una Agaricia pre- sentó enfermedad de banda negra, evidencian- do la muy baja prevalencia de enfermedades. Los géneros más frecuentes de Porifera fueron Xestospongia, Aplysina, y Agelas. Al menos una decena de especies de esponjas desconocidas para la ciencia fueron colectadas. Los sitios que se encontraban fuera de áreas marinas protegidas, generalmente poseían abundancia de peces baja, lo cual pudiera ser un posible indicador de sobrepesca histórica. Individuos de pez león fueron observados en la mayoría de los sitios pero con abundancias bajas en com- paración con otras regiones del Caribe.
    Description: Published
    Keywords: Cuba ; Mesophotic reef ; Geomorphology ; Biozonation ; Biodiversity ; Arrecife mesofótico ; Geomorfología ; Biozonación ; Biodiversidad
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: pp.60-129
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  • 7
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    In:  http://aquaticcommons.org/id/eprint/13873 | 9596 | 2014-01-24 14:10:49 | 13873 | Gulf and Caribbean Fisheries Institute
    Publication Date: 2021-07-06
    Keywords: Fisheries ; GCFI
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 383-393
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  • 8
    Publication Date: 2012-03-23
    Description: Ecological Applications, Volume 0, Issue 0, Ahead of Print.
    Print ISSN: 1051-0761
    Electronic ISSN: 1939-5582
    Topics: Biology
    Published by Wiley on behalf of The Ecological Society of America (ESA).
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  • 9
    Publication Date: 2011-12-10
    Description: Ecology, Volume 0, Issue 0, Ahead of Print.
    Print ISSN: 0012-9658
    Electronic ISSN: 1939-9170
    Topics: Biology
    Published by Wiley on behalf of The Ecological Society of America (ESA).
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  • 10
    Publication Date: 2019
    Description: Abstract The dynamics of spatial heterogeneity of lake surface water temperature (LSWT) at subpixel satellite scale O(1 m) and its effect on the surface cooling estimation at typical satellite pixel areas O(1 km2) were investigated using an airborne platform. The measurements provide maps that revealed spatial LSWT variability with unprecedented detail. The cold season data did not show significant LSWT heterogeneity and hence no surface cooling spatial variability. However, based on three selected daytime subpixel‐scale maps, LSWT patterns showed a variability of 〉2 °C in the spring and 〉3.5 °C in the summer, corresponding to a spatial surface cooling range of 〉20 and 〉40 W/m2, respectively. Due to the nonlinear relationship between turbulent surface heat fluxes and LSWT, negatively skewed LSWT distributions resulted in negatively skewed surface cooling patterns under very stable or predominantly unstable atmospheric boundary layer (ABL) conditions and positively skewed surface cooling patterns under predominantly stable ABL conditions. Implementing a mean spatial filter, the effect of area‐averaged LSWT on the surface cooling estimation up to a typical satellite pixel was assessed. The effect of the averaging filter size on the mean spatial surface cooling values was negligible, except for predominantly stable ABL conditions. In that situation, a reduction of ~3.5 W/m2 was obtained when moving from high O(1 m) to low O(1 km) pixel resolution.
    Print ISSN: 2169-9275
    Electronic ISSN: 2169-9291
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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