The Experts below are selected from a list of 11736 Experts worldwide ranked by ideXlab platform
Yaacov Kahanov - One of the best experts on this subject based on the ideXlab platform.
-
the dor 2001 1 byzantine Shipwreck israel final report
International Journal of Nautical Archaeology, 2014Co-Authors: Yaacov Kahanov, Hadas MorAbstract:Dor 2001/1 was a Byzantine coaster, about 16.9 m long, with an estimated displacement of 50 tonnes, dated to the first third of the 6th century CE, and loaded with building stones. It was excavated over five seasons, recorded under water, and a section of the Shipwreck was retrieved and studied on land. The hull construction was based on frames without any type of planking edge-fasteners. It is thus among the earliest frame-based Shipwrecks found so far in the Mediterranean. The origin of its construction tradition, with flat frames amidships, hard chine and straight sides, might have been related to a riverine tradition.
-
high precision dating the akko 1 Shipwreck israel wiggle matching the life and death of a ship into the historical record
Journal of Archaeological Science, 2014Co-Authors: Brita Lorentzen, D. Cvikel, Sturt W Manning, Yaacov KahanovAbstract:Abstract The Akko 1 Shipwreck is the remains of an eastern Mediterranean naval or auxiliary brig, which was found inside the ancient harbor of Akko, Israel. The Shipwreck and finds were recorded underwater, and some of the ship components, along with the majority of the finds, were retrieved and analyzed. A Bayesian dating model, incorporating 14C wiggle-matching of the ship timbers, tree-ring analysis, and 14C dates from short-lived finds, is used to model the ship's construction and wrecking dates. These new data, combined with the results of archaeological research and available historical records, suggest that the ship was built during the first third of the 19th century as part of Muhammad Ali's fleet. Akko 1 then possibly plied the eastern Mediterranean under the Egyptian flag during the First Egyptian–Ottoman War in 1831–1833. The wrecking event apparently occurred during the 1840 naval bombardment of Akko. This is the first time that 14C wiggle-matching and Bayesian analyses have been used to date the construction and wrecking of a Shipwreck in the southeastern Mediterranean. The results show that Bayesian analysis and 14C wiggle-matching techniques are valuable tools for analyzing the region's Shipwrecks, including those from recent historical periods.
-
the dor 2006 Shipwreck the ceramic material
Tel Aviv, 2013Co-Authors: Diego Barkan, Hans Mommsen, Assaf Yasurlandau, David Benshlomo, Yaacov KahanovAbstract:The ‘Dor 2006’ Shipwreck was discovered in 2006 south of the Dor/Tantura lagoon, Israel. The hull remains are of a large ship that was unable to enter the shallow anchorage. Among the finds were 20 ceramic items, including bowls, cooking–pots, jugs, a juglet, lids and amphoras. The cargo has not yet been found. Pottery typology, coins and 14C tests of organic material date the Shipwreck to between the second half of the 6th and the first quarter of the 7th centuries CE. The construction tradition is different from contemporary Shipwrecks from Dor. Petrography and chemical composition analyses of the ceramics indicate an eastern Mediterranean origin.
-
The ‘Dor 2006’ Shipwreck: The Ceramic Material
Tel Aviv, 2013Co-Authors: Diego Barkan, Assaf Yasur-landau, Hans Mommsen, David Ben-shlomo, Yaacov KahanovAbstract:The ‘Dor 2006’ Shipwreck was discovered in 2006 south of the Dor/Tantura lagoon, Israel. The hull remains are of a large ship that was unable to enter the shallow anchorage. Among the finds were 20 ceramic items, including bowls, cooking–pots, jugs, a juglet, lids and amphoras. The cargo has not yet been found. Pottery typology, coins and 14C tests of organic material date the Shipwreck to between the second half of the 6th and the first quarter of the 7th centuries CE. The construction tradition is different from contemporary Shipwrecks from Dor. Petrography and chemical composition analyses of the ceramics indicate an eastern Mediterranean origin.
Melanie Damour - One of the best experts on this subject based on the ideXlab platform.
-
Deep-Sea Biofilms, Historic Shipwreck Preservation and the Deepwater Horizon Spill
Frontiers Media S.A., 2019Co-Authors: Rachel L. Mugge, Jennifer L Salerno, Melanie Damour, Robert A. Church, Melissa L. Brock, Jason S. Lee, Leila J HamdanAbstract:Exposure to oil from the Deepwater Horizon spill may have lasting impacts on preservation of historic Shipwrecks in the Gulf of Mexico. Submerged steel structures, including Shipwrecks, serve as artificial reefs and become hotspots of biodiversity in the deep sea. Marine biofilms on submerged structures support settlement of micro- and macro-biota and may enhance and protect against corrosion. Disruptions in the local environment, including oil spills, may impact the role that biofilms play in reef preservation. To determine how the Deepwater Horizon spill potentially impacted Shipwreck biofilms and the functional roles of the biofilm microbiome, experiments containing carbon steels disks (CSDs) were placed at five historic Shipwreck sites located within, and external to the benthic footprint of the Deepwater Horizon spill. The CSDs were incubated for 16 weeks to enable colonization by biofilm-forming microorganisms and to provide time for in situ corrosion to occur. Biofilms from the CSDs, as well as sediment and water microbiomes, were collected and analyzed by 16S rRNA amplicon gene sequencing to describe community composition and determine the source of taxa colonizing biofilms. Biofilm metagenomes were sequenced to compare differential gene abundances at spill-impacted and reference sites. Biofilms were dominated by Zeta-, Alpha-, Epsilon-, and Gamma-proteobacteria. Sequences affiliated with the Mariprofundus and Sulfurimonas genera were prolific, and Roseobacter, and Colwellia genera were also abundant. Analysis of 16S rRNA sequences from sediment, water, and biofilms revealed sediment to be the main known source of taxa to biofilms at impacted sites. Differential gene abundance analysis revealed the two-component response regulator CreC, a gene involved in environmental stress response, to be elevated at reference sites compared to impacted sites within the spill plume fallout area on the seafloor. Genes for chemotaxis, motility, and alcohol dehydrogenases were differentially abundant at reference vs. impacted sites. Metal loss on CSDs was elevated at sites within the spill fallout plume. Time series images reveal that metal loss at a heavily impacted site, the German Submarine U-166, has accelerated since the spill in 2010. This study provides evidence that spill residues on the seafloor may impact biofilm communities and the preservation of historic steel Shipwrecks
-
the impact of the deepwater horizon blowout on historic Shipwreck associated sediment microbiomes in the northern gulf of mexico
Scientific Reports, 2018Co-Authors: Leila J Hamdan, Jennifer L Salerno, Allen H Reed, Samantha B Joye, Melanie DamourAbstract:More than 2,000 historic Shipwrecks spanning 500 years of history, rest on the Gulf of Mexico seafloor. Shipwrecks serve as artificial reefs and hotspots of biodiversity by providing hard substrate, something rare in deep ocean regions. The Deepwater Horizon (DWH) spill discharged crude oil into the deep Gulf. Because of physical, biological, and chemical interactions, DWH oil was deposited on the seafloor, where historic Shipwrecks are present. This study examined sediment microbiomes at seven historic Shipwrecks. Steel-hulled, World War II-era Shipwrecks and wooden-hulled, 19th century Shipwrecks within and outside of the surface oiled area and subsurface plume were examined. Analysis of 16S rRNA sequence libraries, sediment radiocarbon age data, sedimentation rates, and hydrocarbons revealed that the German U-boat U-166 and the wooden-hulled sailing vessel known as the Mardi Gras Wreck, both in the Mississippi Canyon leasing area, were exposed to deposited oil during a rapid sedimentation event. Impacts to Shipwreck microbiomes included a significant increase in Piscirickettsiaceae-related sequences in surface sediments, and reduced biodiversity relative to unimpacted sites. This study is the first to address the impact of the spill on Shipwreck-associated microbiomes, and to explore how Shipwrecks themselves influence microbiome diversity in the deep sea.
Leila J Hamdan - One of the best experts on this subject based on the ideXlab platform.
-
Deep-Sea Biofilms, Historic Shipwreck Preservation and the Deepwater Horizon Spill
Frontiers Media S.A., 2019Co-Authors: Rachel L. Mugge, Jennifer L Salerno, Melanie Damour, Robert A. Church, Melissa L. Brock, Jason S. Lee, Leila J HamdanAbstract:Exposure to oil from the Deepwater Horizon spill may have lasting impacts on preservation of historic Shipwrecks in the Gulf of Mexico. Submerged steel structures, including Shipwrecks, serve as artificial reefs and become hotspots of biodiversity in the deep sea. Marine biofilms on submerged structures support settlement of micro- and macro-biota and may enhance and protect against corrosion. Disruptions in the local environment, including oil spills, may impact the role that biofilms play in reef preservation. To determine how the Deepwater Horizon spill potentially impacted Shipwreck biofilms and the functional roles of the biofilm microbiome, experiments containing carbon steels disks (CSDs) were placed at five historic Shipwreck sites located within, and external to the benthic footprint of the Deepwater Horizon spill. The CSDs were incubated for 16 weeks to enable colonization by biofilm-forming microorganisms and to provide time for in situ corrosion to occur. Biofilms from the CSDs, as well as sediment and water microbiomes, were collected and analyzed by 16S rRNA amplicon gene sequencing to describe community composition and determine the source of taxa colonizing biofilms. Biofilm metagenomes were sequenced to compare differential gene abundances at spill-impacted and reference sites. Biofilms were dominated by Zeta-, Alpha-, Epsilon-, and Gamma-proteobacteria. Sequences affiliated with the Mariprofundus and Sulfurimonas genera were prolific, and Roseobacter, and Colwellia genera were also abundant. Analysis of 16S rRNA sequences from sediment, water, and biofilms revealed sediment to be the main known source of taxa to biofilms at impacted sites. Differential gene abundance analysis revealed the two-component response regulator CreC, a gene involved in environmental stress response, to be elevated at reference sites compared to impacted sites within the spill plume fallout area on the seafloor. Genes for chemotaxis, motility, and alcohol dehydrogenases were differentially abundant at reference vs. impacted sites. Metal loss on CSDs was elevated at sites within the spill fallout plume. Time series images reveal that metal loss at a heavily impacted site, the German Submarine U-166, has accelerated since the spill in 2010. This study provides evidence that spill residues on the seafloor may impact biofilm communities and the preservation of historic steel Shipwrecks
-
the impact of the deepwater horizon blowout on historic Shipwreck associated sediment microbiomes in the northern gulf of mexico
Scientific Reports, 2018Co-Authors: Leila J Hamdan, Jennifer L Salerno, Allen H Reed, Samantha B Joye, Melanie DamourAbstract:More than 2,000 historic Shipwrecks spanning 500 years of history, rest on the Gulf of Mexico seafloor. Shipwrecks serve as artificial reefs and hotspots of biodiversity by providing hard substrate, something rare in deep ocean regions. The Deepwater Horizon (DWH) spill discharged crude oil into the deep Gulf. Because of physical, biological, and chemical interactions, DWH oil was deposited on the seafloor, where historic Shipwrecks are present. This study examined sediment microbiomes at seven historic Shipwrecks. Steel-hulled, World War II-era Shipwrecks and wooden-hulled, 19th century Shipwrecks within and outside of the surface oiled area and subsurface plume were examined. Analysis of 16S rRNA sequence libraries, sediment radiocarbon age data, sedimentation rates, and hydrocarbons revealed that the German U-boat U-166 and the wooden-hulled sailing vessel known as the Mardi Gras Wreck, both in the Mississippi Canyon leasing area, were exposed to deposited oil during a rapid sedimentation event. Impacts to Shipwreck microbiomes included a significant increase in Piscirickettsiaceae-related sequences in surface sediments, and reduced biodiversity relative to unimpacted sites. This study is the first to address the impact of the spill on Shipwreck-associated microbiomes, and to explore how Shipwrecks themselves influence microbiome diversity in the deep sea.
Diego Barkan - One of the best experts on this subject based on the ideXlab platform.
-
the dor 2006 Shipwreck the ceramic material
Tel Aviv, 2013Co-Authors: Diego Barkan, Hans Mommsen, Assaf Yasurlandau, David Benshlomo, Yaacov KahanovAbstract:The ‘Dor 2006’ Shipwreck was discovered in 2006 south of the Dor/Tantura lagoon, Israel. The hull remains are of a large ship that was unable to enter the shallow anchorage. Among the finds were 20 ceramic items, including bowls, cooking–pots, jugs, a juglet, lids and amphoras. The cargo has not yet been found. Pottery typology, coins and 14C tests of organic material date the Shipwreck to between the second half of the 6th and the first quarter of the 7th centuries CE. The construction tradition is different from contemporary Shipwrecks from Dor. Petrography and chemical composition analyses of the ceramics indicate an eastern Mediterranean origin.
-
The ‘Dor 2006’ Shipwreck: The Ceramic Material
Tel Aviv, 2013Co-Authors: Diego Barkan, Assaf Yasur-landau, Hans Mommsen, David Ben-shlomo, Yaacov KahanovAbstract:The ‘Dor 2006’ Shipwreck was discovered in 2006 south of the Dor/Tantura lagoon, Israel. The hull remains are of a large ship that was unable to enter the shallow anchorage. Among the finds were 20 ceramic items, including bowls, cooking–pots, jugs, a juglet, lids and amphoras. The cargo has not yet been found. Pottery typology, coins and 14C tests of organic material date the Shipwreck to between the second half of the 6th and the first quarter of the 7th centuries CE. The construction tradition is different from contemporary Shipwrecks from Dor. Petrography and chemical composition analyses of the ceramics indicate an eastern Mediterranean origin.
Robert A. Church - One of the best experts on this subject based on the ideXlab platform.
-
Deep-Sea Biofilms, Historic Shipwreck Preservation and the Deepwater Horizon Spill
Frontiers Media S.A., 2019Co-Authors: Rachel L. Mugge, Jennifer L Salerno, Melanie Damour, Robert A. Church, Melissa L. Brock, Jason S. Lee, Leila J HamdanAbstract:Exposure to oil from the Deepwater Horizon spill may have lasting impacts on preservation of historic Shipwrecks in the Gulf of Mexico. Submerged steel structures, including Shipwrecks, serve as artificial reefs and become hotspots of biodiversity in the deep sea. Marine biofilms on submerged structures support settlement of micro- and macro-biota and may enhance and protect against corrosion. Disruptions in the local environment, including oil spills, may impact the role that biofilms play in reef preservation. To determine how the Deepwater Horizon spill potentially impacted Shipwreck biofilms and the functional roles of the biofilm microbiome, experiments containing carbon steels disks (CSDs) were placed at five historic Shipwreck sites located within, and external to the benthic footprint of the Deepwater Horizon spill. The CSDs were incubated for 16 weeks to enable colonization by biofilm-forming microorganisms and to provide time for in situ corrosion to occur. Biofilms from the CSDs, as well as sediment and water microbiomes, were collected and analyzed by 16S rRNA amplicon gene sequencing to describe community composition and determine the source of taxa colonizing biofilms. Biofilm metagenomes were sequenced to compare differential gene abundances at spill-impacted and reference sites. Biofilms were dominated by Zeta-, Alpha-, Epsilon-, and Gamma-proteobacteria. Sequences affiliated with the Mariprofundus and Sulfurimonas genera were prolific, and Roseobacter, and Colwellia genera were also abundant. Analysis of 16S rRNA sequences from sediment, water, and biofilms revealed sediment to be the main known source of taxa to biofilms at impacted sites. Differential gene abundance analysis revealed the two-component response regulator CreC, a gene involved in environmental stress response, to be elevated at reference sites compared to impacted sites within the spill plume fallout area on the seafloor. Genes for chemotaxis, motility, and alcohol dehydrogenases were differentially abundant at reference vs. impacted sites. Metal loss on CSDs was elevated at sites within the spill fallout plume. Time series images reveal that metal loss at a heavily impacted site, the German Submarine U-166, has accelerated since the spill in 2010. This study provides evidence that spill residues on the seafloor may impact biofilm communities and the preservation of historic steel Shipwrecks
-
Deep-Water Shipwreck Initial Site Formation: The Equation of Site Distribution
Journal of Maritime Archaeology, 2014Co-Authors: Robert A. ChurchAbstract:Deep-water Shipwrecks and associated debris often sit on the bottom with relatively little disturbance, except for the natural bio-chemical deterioration. The distribution of Shipwreck material can often be calculated mathematically as a function of heading, speed, time, and water depth. The Equation of Site Distribution is a method aimed to better understand deep-water site formation and the wrecking events themselves. With the use of a few relatively simple formulas, key elements of a site can be discovered, as well as greater insight of the overall wrecking event achieved.
