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24 results for “benthic indicators”
Fig. 4 in Benthic hydrozoan assemblages as potential indicators of environmental health in a mediterranean marine protected area Abstract
Fig. 4: Two-dimensional nMDS representation of the similarity (Bray-Curtis) of hydrozoan assemblages among samples in the winter campaign. Samples displayed according to stations (numbers) and sampling depth (a), anthropogenic impact (b) and substrate type (c).
Fig. 2 in Benthic hydrozoan assemblages as potential indicators of environmental health in a mediterranean marine protected area Abstract
Fig. 2: Species numbers according to depth strata and total depth integrated species numbers in the study area.
Fig. 1 in Three shell types in Mardinella daviesi indicate the evolution of a paratrimorphic life cycle among late Paleocene soritid benthic foraminifera
Fig. 1. Measured column of the Qorban member in the study locality. A. Position of the Qorban section in the general map of Iran. B. Satellite image with the position of the section base (star). C. Qorban Member stratigraphy with indication of the four Mardinella-rich levels studied in this work. Abbreviations: Fm., Formation; Maas., Maastrichtian; SBZ, Shallow Benthic Zones; U.C., Upper Cretaceous.
Fig. 3 in Three shell types in Mardinella daviesi indicate the evolution of a paratrimorphic life cycle among late Paleocene soritid benthic foraminifera
Fig. 3. Megalospheric forms of soritid foraminifer Mardinella daviesi (Henson, 1950) from the Thanetian, Paleocene of Iran. A. Gmm13980F41b, centred section of a gamont (A2) individual. C, E, G. Gmm13980F39a, Gmm13980F39c, Gmm13980F41c, respectively, juvenile schizonts (A1) in equatorial (C, G) and axial (E) views. B, H. Gmm13980F40e, Gmm13980F41d, respectively, equatorial section of an adult schizont. D. Gmm13980F39b, subaxial sections of two adult schizonts. F. Gmm13980F39d, equatorial section of an adult schizont; note the crosswise oblique disposition of pillars. Scale bar 1 mm.
Fig. 2. Microspheric B in Three shell types in Mardinella daviesi indicate the evolution of a paratrimorphic life cycle among late Paleocene soritid benthic foraminifera
Fig. 2. Microspheric B forms (agamonts) of soritid foraminifer Mardinella daviesi (Henson, 1950) from the Thanetian, Paleocene of Iran. A. Gmm13980F40a, subaxial oblique section; note the brood chambers in the adult reproductive stage of growth (arrows). B. Gmm13980F40b, axial section showing empty brood chambers (two-headed arrow) on both sides of the specimen. C. Gmm13980F40c, subequatorial section. D. Gmm13980F40d, oblique section with some brood chambers (two-headed arrow). E. Gmm13980F41a, fragment of shell with five brood chambers; note the irregularly disposed beams. Scale bar 1 mm.
Fig. 3 in Benthic hydrozoan assemblages as potential indicators of environmental health in a mediterranean marine protected area Abstract
Fig. 3: Two-dimensional nMDS representation of the similarity (Bray-Curtis) of hydrozoan assemblages among samples in the summer campaign. Samples displayed according to stations (numbers) and sampling depth (a), anthropogenic impact (b) and substrate type (c).
Рис. 1. Карта-схема заповеΑника «КомсомоΛьский» с указанием станций отбора проб зообентоса (по: http://www.zapovedamur.ru) Fig. 1. Map of the Komsomolsky Reserve with indication of zoobenthos sampling stations (after: http://www.zapovedamur.ru) in Taxonomic composition of benthic invertebrates of the Komsomolsky Nature Reserve watercourses (Khabarovsky Region)
Рис. 1. Карта-схема заповеΑника «КомсомоΛьский» с указанием станций отбора проб зообентоса (по: http://www.zapovedamur.ru) Fig. 1. Map of the Komsomolsky Reserve with indication of zoobenthos sampling stations (after: http://www.zapovedamur.ru)
Fig. 1 in Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay
Fig. 1. Study area bathymetry (Liu and Dittert 2010), surface circulation patterns (Koutsikopoulos et al. 1996), and location of the study Site WH (44°33′N, 2°45′W; 2,000 m water depth). The position of Site KS10b (Mojtahid et al. 2013) is marked by a white square. IPC – Iberian Poleward Current, ENACW – Eastern North Atlantic Central Waters.
Fig. 5. a in Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay
Fig. 5. a – oxygen stable isotope ratios (δ18O) performed on G. bulloides and G. inflata; b – Δδ 18O between δ18O and δ18O; G. inflata G. bulloides c – carbon stable isotope ratios (δ13C) performed on G. bulloides and G. inflata; d – Δδ 13C between δ13C and δ13C. The grey G. inflata G. bulloides lines represent FC WH and the black colour represents CADIAC WH. The horizontal dotted lines delimitate the major changes (see text for all the details).
Fig. 4. a in Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay
Fig. 4. a – time records in Cores CADIAC WH (black color) and FC WH (grey color) of benthic foraminiferal abundances (ind. g–1 of dry sediment), benthic foraminiferal accumulation rates (ind. cm–2 ka–1), relative abundances of the main benthic species present with ≥ 5% in at least one sample (after removing the non-fossilizing taxa), and species richness; b – time records in Cores CADIAC WH (black color) and FC WH (grey color) of planktic foraminiferal abundances (ind. g–1 of dry sediment), same indications as for benthic faunas. The horizontal dotted lines delimitate the major foraminiferal changes (see text for all the details).
Text-fig. 2. (A) Orientation of Schizocrania filosa (HALL, 1847) on articulated shells of benthic brachiopod Rafinesquina sp. (A1–A3 – on dorsal valve of articulated shells, A4 – on ventral valve of articulated shell; forward growth direction is unclear in three specimens) from Upper Ordovician, Corryville Formation, Lawrenceburg, Indiana (after www.drydredgers.org/scizo.htm). (B) Orientation of Schizocrania multistriata (REED, 1905) shells on outer face of conulariid Metaconularia imperialis test (Dobrotivá Formation, Kařízek mine, Barrandian area; after Havlíček and Vaněk 1996); preserved conulariid shell in white, suggested outline of incomplete conulariid test in grey. Arrows indicate direction of forward growth of Schizocrania specimens. in Schizocrania (Brachiopoda, Discinoidea): Taxonomy, Occurrence, Ecology And History Of The Earliest Epizoan Lingulate Brachiopod
Text-fig. 2. (A) Orientation of Schizocrania filosa (HALL, 1847) on articulated shells of benthic brachiopod Rafinesquina sp. (A1–A3 – on dorsal valve of articulated shells, A4 – on ventral valve of articulated shell; forward growth direction is unclear in three specimens) from Upper Ordovician, Corryville Formation, Lawrenceburg, Indiana (after www.drydredgers.org/scizo.htm). (B) Orientation of Schizocrania multistriata (REED, 1905) shells on outer face of conulariid Metaconularia imperialis test (Dobrotivá Formation, Kařízek mine, Barrandian area; after Havlíček and Vaněk 1996); preserved conulariid shell in white, suggested outline of incomplete conulariid test in grey. Arrows indicate direction of forward growth of Schizocrania specimens.
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. 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.
Dinoflagellate cysts and benthic foraminifera from surface sediments of Svalbard fjords and shelves as paleoenvironmental indicators
<p>Supplementary Table 1. Seasonally averaged sea-ice cover, SST and SSS data used for the multivariate statistical analysis.</p> <p>Supplementary Table 2. Relative abundances of individual dinoflagellate cyst taxa, total cyst concentration [cysts g<sup>-1</sup>], and relative abundance of auto- and heterotrophic cysts at each station.</p> <p>Supplementary Table 3. Relative abundances of individual benthic foraminifera taxa, total benthic foraminifera concentration [forams g<sup>-1</sup>], and relative abundance of calcareous and agglutinated benthic foraminifera at each station.</p>
Compilation of 17 anthropogenic pressure gradients and 18 benthic indicators in the Baltic Sea, Atlantic Ocean and Mediterranean Sea
<p>Compilation of 17 benthic datasets that sampled benthic ecosystems over gradients of commercial bottom trawling intensity (n=14), eutrophication (n=1), oxygen depletion (n=1) and pollution (n=1) (Table 1).</p> <p>Compilation of 18 benthic indicators that were calculated for each gradient dataset. The indicators estimated were community biomass, abundance, richness, relative Margalef diversity, Shannon index, Simpson index, Inverse Simpson, AZTI’s Marine Biotic Index (AMBI), Multivariate AMBI (M-AMBI), BENTIX Biotic Index (BENTIX), Danish Quality Index (DKI), Trawling Disturbance Index (TDI), Modified TDI (mTDI), Modified vulnerability index (mT), Median longevity (Lm), Partial TDI (pTDI), Sentinels of Seabed (SoS), Long-lived fraction (Lf).</p> <p>The dataset has information on: 1) indicator outputs per sampling station; 2) combined data tables with gradient, station, and species information; 3) individual gradient information with replicate samples and the environmental variables reported in the original study.</p> <p>#----------------</p> <p>NOTE: The dataset was updated in February 2025 due to incorrect description of units used for two gradients (Silver Pit and Thames) in the "Individual Gradient Studies" folder.</p> <p>#---------------</p> <p>Table 1. Overview of anthropogenic gradient datasets</p> <table> <tbody> <tr> <th>Location</th> <th>Sampling method</th> <th>Pressure gradient</th> </tr> </tbody> <tbody> <tr> <td>Adriatic Sea – Italian EEZ (sand)</td> <td>Rapido trawl</td> <td>Bottom trawling</td> </tr> <tr> <td>Adriatic Sea – Italian EEZ (mud)</td> <td>Rapido trawl</td> <td>Bottom trawling</td> </tr> <tr> <td>North Sea - Dutch EEZ</td> <td>Box core</td> <td>Bottom trawling</td> </tr> <tr> <td>North Sea - Dogger Bank</td> <td>Hamon grab</td> <td>Bottom trawling</td> </tr> <tr> <td>North Sea - Fladen Ground</td> <td>Day grab</td> <td>Bottom trawling</td> </tr> <tr> <td>North Sea - Long Forties</td> <td>Hamon grab</td> <td>Bottom trawling</td> </tr> <tr> <td>North Sea - Silver Pit</td> <td>Box core</td> <td>Bottom trawling</td> </tr> <tr> <td>North Sea – Thames</td> <td>Box core</td> <td>Bottom trawling</td> </tr> <tr> <td>Northern Iberian Coast (sand)</td> <td>Otter trawl</td> <td>Bottom trawling</td> </tr> <tr> <td>Northern Iberian Coast (mud)</td> <td>Otter trawl</td> <td>Bottom trawling</td> </tr> <tr> <td>Baltic Sea - Gotland</td> <td>van Veen grab</td> <td>Bottom trawling</td> </tr> <tr> <td>Baltic Sea – Polish EEZ</td> <td>Box core</td> <td>Bottom trawling</td> </tr> <tr> <td>NW Atlantic - Flemish Cap</td> <td>Otter trawl</td> <td>Bottom trawling</td> </tr> <tr> <td>Irish Sea - Sellafield</td> <td>Day grab</td> <td>Bottom trawling</td> </tr> <tr> <td>Gulf of Finland</td> <td>van Veen grab</td> <td>Oxygen depletion</td> </tr> <tr> <td>Saronikos Gulf</td> <td>Box core</td> <td>Eutrophication</td> </tr> <tr> <td>Vigo Estuary</td> <td>Box core</td> <td>Contaminants</td> </tr> </tbody> </table>
Fig. 1 in Benthic hydrozoan assemblages as potential indicators of environmental health in a mediterranean marine protected area Abstract
Fig. 1: Sampling stations and associated level of impact in the study area.
Figure 4 in Community properties of benthic molluscs as indicators of environmental stress induced by organic enrichment
Figure 4. MDS plots of Functional Feeding Groups (FFG) where mean abundance of each group is superimposed.
Figure 3 in Community properties of benthic molluscs as indicators of environmental stress induced by organic enrichment
Figure 3. MDS plot (a) and cluster analysis (b) of species abundances highlighting three main groups of areas.
Figure 2 in Community properties of benthic molluscs as indicators of environmental stress induced by organic enrichment
Figure 2. Probability funnels of diversity indices Δ+ (a) and Λ+ (b) for all sampling stations and seasons in the study area.
Figure 1. A in Community properties of benthic molluscs as indicators of environmental stress induced by organic enrichment
Figure 1. A map of the island of Lesvos indicating Gera Gulf, the study area (Palioloutro) where the fish farm unit is located and the sampling sites.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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