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23 results for “benthic fauna”
Рис. 2. ΔенΑрограмма схоΑства фаун Αонных беспозвоночных воΑотоков заповеΑника «КомсомоΛьский» (UPGMA, коэффициент Сёренсена) Fig. 2. Dendrogram of the fauna similarity of benthic invertebrates of the Komsomolsky Nature Reserve watercourses (UPGMA, Sorensen coefficient) in Taxonomic composition of benthic invertebrates of the Komsomolsky Nature Reserve watercourses (Khabarovsky Region)
Рис. 2. ΔенΑрограмма схоΑства фаун Αонных беспозвоночных воΑотоков заповеΑника «КомсомоΛьский» (UPGMA, коэффициент Сёренсена) Fig. 2. Dendrogram of the fauna similarity of benthic invertebrates of the Komsomolsky Nature Reserve watercourses (UPGMA, Sorensen coefficient)
Linked collectors and determiners for: Ifremer BIOCEAN database (Deep Sea Benthic Fauna).
Natural history specimen data linked to collectors and determiners held within, "Ifremer BIOCEAN database (Deep Sea Benthic Fauna)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/96309e26-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/96309e26-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/96309e26-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/96309e26-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: On the composition of the benthic fauna of the western Fram Strait.
Natural history specimen data linked to collectors and determiners held within, "On the composition of the benthic fauna of the western Fram Strait". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/8e6636ad-0b6a-426a-9515-985288f558ba">https://bionomia.net/dataset/8e6636ad-0b6a-426a-9515-985288f558ba</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/8e6636ad-0b6a-426a-9515-985288f558ba">https://gbif.org/dataset/8e6636ad-0b6a-426a-9515-985288f558ba</a>. Formatted as a Frictionless Data package.
Text-fig. 6. a. Vertical section showing part of body-chamber of a Cenoceras in the top of the Main Cenoceras Bed associated with attached oysters below and stringers of crinoid debris below and stretching laterally. Coin 23 mm in diameter. b. Complete lateral half of conch showing intact and elastically deformed septa on which rests crinoid debris that spreads across the exposed septa and onto the adjacent substrate. Conch approximately 180 mm in diameter. c. Individual showing dispersed crinoid and molluscan debris within body-chamber and septa in the crushed inner whorls that have taken a sparite cement prior to, and after having undergone brittle deformation. 160 mm in diameter. d. Vertically embedded specimen showing the loss of septa in the inner whorls that are infilled with matrix mottled by bioturbation. Tape measure provides scale. in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 6. a. Vertical section showing part of body-chamber of a Cenoceras in the top of the Main Cenoceras Bed associated with attached oysters below and stringers of crinoid debris below and stretching laterally. Coin 23 mm in diameter. b. Complete lateral half of conch showing intact and elastically deformed septa on which rests crinoid debris that spreads across the exposed septa and onto the adjacent substrate. Conch approximately 180 mm in diameter. c. Individual showing dispersed crinoid and molluscan debris within body-chamber and septa in the crushed inner whorls that have taken a sparite cement prior to, and after having undergone brittle deformation. 160 mm in diameter. d. Vertically embedded specimen showing the loss of septa in the inner whorls that are infilled with matrix mottled by bioturbation. Tape measure provides scale.
Text-fig. 2. General view of Helwell Bay, Doniford, looking west along the upper beach exposure and the Main Cenoceras Bed. in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 2. General view of Helwell Bay, Doniford, looking west along the upper beach exposure and the Main Cenoceras Bed.
Text-fig. 4. Sedimentological log of the Main Cenoceras Bed and associated strata in the Quantocks Beds (Lyra Subzone) at Helwell Bay, Doniford (measured at NGR ST 0802 4314 and ST 0336 4305). BGS bed no. refers to bed numbers employed in Whittaker and Green (1983). in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 4. Sedimentological log of the Main Cenoceras Bed and associated strata in the Quantocks Beds (Lyra Subzone) at Helwell Bay, Doniford (measured at NGR ST 0802 4314 and ST 0336 4305). BGS bed no. refers to bed numbers employed in Whittaker and Green (1983).
Text-fig. 1. Map of Southwest England indicating general and detailed location of the Watchet to St. Audries Bay area on the West Somerset coast. in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 1. Map of Southwest England indicating general and detailed location of the Watchet to St. Audries Bay area on the West Somerset coast.
Text-fig. 7. a. Worn section through a horizontally bedded body-chamber and phragmocone, body-chamber showing oyster attached to inside of aperture as well as burrow mottling. Tape measure provides scale. b. Body-chamber and crushed phragmocone with body-chamber and phragmocone entirely filled with bioturbated matrix containing stringers of crinoid and molluscan debris. Flank of phragmocone encrusted by oysters. Tape measure for scale. c. Complex of Thallassinoides and Diplocraterion burrows associated with conch that has been eroded out by wave action. A few 'Ghostly' fragments of ammonite are also present. Original scope of the image approximately 400 mm. c. Verically embedded conch with largely intact septa and camera infilled with burrowed matrix containing crinoid debris. Tape measure for scale. in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 7. a. Worn section through a horizontally bedded body-chamber and phragmocone, body-chamber showing oyster attached to inside of aperture as well as burrow mottling. Tape measure provides scale. b. Body-chamber and crushed phragmocone with body-chamber and phragmocone entirely filled with bioturbated matrix containing stringers of crinoid and molluscan debris. Flank of phragmocone encrusted by oysters. Tape measure for scale. c. Complex of Thallassinoides and Diplocraterion burrows associated with conch that has been eroded out by wave action. A few 'Ghostly' fragments of ammonite are also present. Original scope of the image approximately 400 mm. c. Verically embedded conch with largely intact septa and camera infilled with burrowed matrix containing crinoid debris. Tape measure for scale.
Text-fig. 8. a. Shell belonging to one flank of the conch a horizontally bedded individual with sveral large oysters attached to its underside indicating that the shell was either originally vertical or was flipped from one surface to the other by turbulance. Approximately 300 mm across. b. Crushed individual showing oysters encrusting both flanks of the conch. 250 mm in diameter. c. Wave-worn conch showing oysters attached to the umbilicus, the venter and possibly the inside of the body-chamber. Tape measure for scale. d. Flank of conch with crinoid debris and oysters spread around its periphery. Scope of image approximately 350 mm. in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 8. a. Shell belonging to one flank of the conch a horizontally bedded individual with sveral large oysters attached to its underside indicating that the shell was either originally vertical or was flipped from one surface to the other by turbulance. Approximately 300 mm across. b. Crushed individual showing oysters encrusting both flanks of the conch. 250 mm in diameter. c. Wave-worn conch showing oysters attached to the umbilicus, the venter and possibly the inside of the body-chamber. Tape measure for scale. d. Flank of conch with crinoid debris and oysters spread around its periphery. Scope of image approximately 350 mm.
Text-fig. 9. a. Shorn-off, vertically embedded conch surrounded by layer of crinoid debris at level of planation of shell and with some debris within the conch at this level. Lateral width of body-chamber 80 mm. b. Example of ammonite that occurs rarely in the Main Cenoceras Bed. Note the poorly defined shell particularly on the outer whorl, suggesting partial dissolution. Tape measure for scale. in 'Cenoceras Islands' In The Blue Lias Formation (Lower Jurassic) Of West Somerset, Uk: Nautilid Dominance And Influence On Benthic Faunas
Text-fig. 9. a. Shorn-off, vertically embedded conch surrounded by layer of crinoid debris at level of planation of shell and with some debris within the conch at this level. Lateral width of body-chamber 80 mm. b. Example of ammonite that occurs rarely in the Main Cenoceras Bed. Note the poorly defined shell particularly on the outer whorl, suggesting partial dissolution. Tape measure for scale.
KuramBio 2012_Lebensspuren and benthic fauna area data
<p>Lebensspuren data genrated by the random selection of 50 frames per station of the KuramBio 2012 expedition (8 stations analyzed; the depth of the stations ranged from 4,868 m to 5,768 m). In these 400 frames, the area of 5,692 lebensspuren was measured and the lebensspuren were classified. Additionally, megabenthic fauna was quantified and classified as "faunal coverage" at each station, which was the area covered by all individual megabenthic organisms. This "faunal coverage" area is based on the measurements of 4,009 individual animals. Environmental variables: content of grain fractions (%Sand, %Silt/Clay), organic carbon in the sediment (total weight (wt%) of the sediment), and chlorophyll-α concentrations (Chl.-α, μg/g) were obtained from previously published data on the studied stations (Sattarova and Artemova, 2015; Schmidt et al., 2019). </p>
Fig. 1 in First Description Of Invertebrate Benthic Fauna In Middle Zone Of The Loa River (Chile)
Fig. 1. Map of studied sites.
Data from: Estimating sensitivity of seabed habitats to disturbance by bottom trawling based on the longevity of benthic fauna
Bottom fishing such as trawling and dredging may pose serious risks to the seabed and benthic habitats, calling for a quantitative assessment method to evaluate the impact and guide management to develop mitigation measures. We provide a method to estimate the sensitivity of benthic habitats based on the longevity composition of the invertebrate community. We hypothesize that long-lived species are more sensitive to trawling mortality due to their lower pace of life (i.e. slower growth, late maturation). We analyse data from box-core and grab samples taken from 401 stations in the English Channel and southern North Sea to estimate the habitat-specific longevity composition of the benthic invertebrate community and of specific functional groups (i.e. suspension feeders and bioturbators), and examine how bottom trawling affects the longevity biomass composition. The longevity biomass composition differed between habitats governed by differences in sediment composition (gravel and mud content) and tidal bed-shear stress. The biomass proportion of long-lived species increased with gravel content and decreased with mud content and shear stress. Bioturbators had a higher median longevity than suspension feeders. Trawling, in particular by gears that penetrate the seabed >2cm, shifted the community towards shorter-lived species. Changes from bottom trawling were highest in habitats with many long-lived species (hence increasing with gravel content, decreasing with mud content). Benthic communities in high shear stress habitats were less affected by bottom trawling. Using these relationships, we predicted the sensitivity of the benthic community from bottom trawling impact at large spatial scale (the North Sea). We derived different benthic sensitivity metrics that provide a basis to estimate indicators of trawling impact on a continuous scale for the total community and specific functional groups. In combination with high resolution data of trawling pressure, our approach can be used to monitor and assess trawling impact and seabed status at the scale of the region or broadscale habitat and to compare the environmental impact of bottom-contacting fishing gears across fisheries.
Supplementary material 3 from: Hahn SJ, Brandt A, Sonnewald M (2022) Annotated checklist and biodiversity analysis of benthic fauna at Sylt Outer Reef and Borkum Reef Ground (North Sea). Check List 18(3): 593-628. https://doi.org/10.15560/18.3.593
Supplementary material 3 from: Hahn SJ, Brandt A, Sonnewald M (2022) Annotated checklist and biodiversity analysis of benthic fauna at Sylt Outer Reef and Borkum Reef Ground (North Sea). Check List 18(3): 593-628. https://doi.org/10.15560/18.3.593
Supplementary material 2 from: Hahn SJ, Brandt A, Sonnewald M (2022) Annotated checklist and biodiversity analysis of benthic fauna at Sylt Outer Reef and Borkum Reef Ground (North Sea). Check List 18(3): 593-628. https://doi.org/10.15560/18.3.593
Supplementary material 2 from: Hahn SJ, Brandt A, Sonnewald M (2022) Annotated checklist and biodiversity analysis of benthic fauna at Sylt Outer Reef and Borkum Reef Ground (North Sea). Check List 18(3): 593-628. https://doi.org/10.15560/18.3.593
Supplementary material 1 from: Hahn SJ, Brandt A, Sonnewald M (2022) Annotated checklist and biodiversity analysis of benthic fauna at Sylt Outer Reef and Borkum Reef Ground (North Sea). Check List 18(3): 593-628. https://doi.org/10.15560/18.3.593
Supplementary material 1 from: Hahn SJ, Brandt A, Sonnewald M (2022) Annotated checklist and biodiversity analysis of benthic fauna at Sylt Outer Reef and Borkum Reef Ground (North Sea). Check List 18(3): 593-628. https://doi.org/10.15560/18.3.593
Supplementary material 1 from: van Deurs M, Moran NP, Schreiber Plet-Hansen K, Dinesen GE, Azour F, Carl H, Møller PR, Behrens JW (2021) Impacts of the invasive round goby (Neogobius melanostomus) on benthic invertebrate fauna: a case study from the Baltic Sea. NeoBiota 68: 19-30. https://doi.org/10.3897/neobiota.68.67340
S1. Sampling Areas (Figure S1); S2. Taxonomic Groupings S1; S3. Model Specifications (Table S2); S4. Sensitivity Analyses (Table S3, Figure S2)
Data from: Estimating sensitivity of seabed habitats to disturbance by bottom trawling based on the longevity of benthic fauna
Open the record for dataset details and reuse information.
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic
<p>Climate change is altering the biogeochemical and physical characteristics of the Arctic marine environment, which impacts sea ice algal and phytoplankton bloom dynamics and the vertical transport of these carbon sources to benthic communities. Little is known about whether the contribution of sea ice-derived carbon to benthic fauna and nitrogen cycling has changed over multiple decades in concert with receding sea ice. We combined compound-specific stable isotope analysis of amino acids with highly-branched isoprenoid diatom lipid biomarkers using archived (1982-2016) tissue of benthivorous Atlantic walrus to examine temporal trends of sea ice-derived carbon, nitrogen isotope baseline and trophic position of Atlantic walrus at high- and mid-latitudes in the Canadian Arctic. Associated with an 18% sea ice decline in the mid-Arctic, sea ice-derived carbon contribution to Atlantic walrus decreased by 75% suggesting a strong decoupling of sea ice-benthic habitats. In contrast, a nearly exclusive amount of sea ice-derived carbon was maintained in high-Arctic Atlantic walrus (98% in 1996 and 89% in 2006) despite a similar percentage in sea ice reduction. Nitrogen isotope baseline or the trophic position of Atlantic walrus did not change over time at either location. These findings indicate spatial differences in the restructuring of carbon energy sources utilized by Atlantic walrus and their benthic prey and in turn, a change in Arctic marine ecosystem functioning between sea ice-pelagic-benthic habitats.</p>
Lebensspuren and benthic fauna diversity and density data obtained from KuramBio 2012 expedition still images (50 still images per 8 deep-sea stations)
<p>Lebensspuren and total benthic fauna diversity and density data generated by the random selection of 50 still images per station of the KuramBio 2012 expedition (Stations 3-6, 8-11; the depth of the stations ranged from 4,868 m to 5,768 m). Annotation and data reports were conducted with BIIGLE 2.0. Still images belong to videos where the Ocean Floor Observation System (OFOS) was deployed. For more information see the cruise report (RV Sonne cruise SO223; doi:10.1016/j.dsr2.2014.11.001) and Miguez-Salas et al., (2023).</p><p> </p>
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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