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29 results for “Rhizaria”
Rhizaria abundance, biomass, and trophic interactions at the Northern Gulf of Alaska LTER site during summer 2023 cruise KM2308
This dataset consists of Rhizaria abundance, biomass, number of individuals with captured prey, and number of individuals that interacted with algal cells, by taxonomic group. Taxonomic group ID characteristics and biomass calculation details are also presented. Sampling occurred on NGA-LTER research cruise KM2308 during summer 2023 at four stations and four different depth-intervals. Seawater samples were collected from CTD-secured Niskin bottles, concentrated by reverse filtration with 50 μm mesh, and analyzed back in the lab with inverted epi-fluorescence microscopy. Excel spreadsheets were converted to CSV files for preservation. These data are part of the Northern Gulf of Alaska Long Term Ecological Research (NGA LTER) program. The LTER program is a National Science Foundation–funded network of 28 sites nationwide that focus on the influence of long-term and large-scale phenomenon on ecosystems. Additional funding for sampling is provided by the North Pacific Research Board (NPRB), the Alaska Ocean Observing System (AOOS), and the Exxon Valdez Oil Spill Trustee Council (EVOS) via the Gulf Watch Alaska program.
Figure 10 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 10. Maximum-likelihood tree of Weddell Sea gromiids (shaded boxes), Arabian Sea gromiids (Aranda da Silva et al., 2006), and Gromia oviformis from shallow-water localities (Burki et al., 2002), based on partial small subunit ribosomal DNA (SSU rDNA) sequences. The numbers at the nodes represent the percentage of bootstrap support,> 50%. Weddell Sea gromiids are grouped into three distinct clades (A, B, and C).
Figure 3 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 3. Gromia marmorea sp. nov. A, B, scanning electron microscope (SEM) photographs of wall consisting of multiple layers. C, transmission electron microscope (TEM) photograph of 'honeycomb membrane' layer. D, detail of (C).
Figure 4 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 4. Gromia marmorea sp. nov. scanning electron microscope (SEM) photographs. A, oral capsule (the arrow indicates the direction of the photograph sequence shown in panels Ci–Civ). B, perforations of the test surface. Ci–Civ, sequence of photographs over a distance of 250 Mm showing test pores (each pore is highlighted by a white circle), with the number of pores increasing with increasing distance from the aperture (from left to right); 4000¥ magnification. D, E, interior of broken specimen showing stercomata and other structures.
Figure 1 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 1. Stations sampled in the Weddell Sea during the RV Polarstern cruise, leg ANT-XXII/3, from 22nd January to 6th April, 2006. Filled circles indicate sample stations for Gromia marmorea sp. nov. (133#2) at 1584-m depth, Gromia winnetoui sp. nov. (121#7) at ~2600-m depth, and Gromia melinus sp. nov. (81#8 and 80#9) at 3101- and 4392-m depth, respectively.
Figure 2 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 2. Gromia marmorea sp. nov. A–D, reflected-light photographs of preserved specimens, from station 133#2, 1584-m depth. Photographed in water. A, holotype, reg. no. SMF XXVII 7398, spherical morphotype. B, paratype, reg. no. SMF XXVII 7399, droplet-shaped morphotype. C, paratype, reg. no. SMF XXVII 7399, oval morphotype. D, detail of oral capsule. E, scanning electron microscope (SEM) photograph of oral capsule. F, unfixed specimens.
Figure 6 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 6. Gromia melinus sp. nov. A, reflected light photograph, station 80#9, at 3103-m depth. B, transmission electron microscope (TEM) photograph of 'honeycomb membrane' layer at a 5000¥ magnification. C, TEM photograph at a 50 000¥ magnification. D, TEM photograph at a 100 000¥ magnification.
Figure 7 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 7. Gromia winnetoui sp. nov. A–D, reflected-light photographs, station 121#7, ~2600-m depth. A, holotype, reg. no. SMF XXVII 7402, agglutinated specimen. B, paratype, reg. no. SMF XXVII 7403, elongate oval specimen (the circle indicates the oral capsule). C, D, irregularly shaped specimen (the circles indicate the oral capsules).
Figure 9 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 9. Gromia winnetoui sp. nov. A–D, transmission electron microscope (TEM) photographs of the test wall, including the 'honeycomb membrane' layer (hm), station 121#7, ~2600-m depth.
Figure 5 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 5. Reflected-light photographs of Gromia melinus sp. nov. from station 80#9, at 3103-m depth (A–C), and station 81#9, at 4392-m depth (D); photographed in water. A, paratype, reg. no. SMF XXVII 7401, subtriangular morphotype. B, holotype, reg. no. SMF XXVII 7400, droplet-shaped morphotype. C, asymmetrically irregular morphotype. D, spherical morphotype with two oral capsules. E, scanning electron microscope (SEM) photograph of the polygonal pattern on the wall surface. F, SEM photograph of agglutinated clay particles on the surface of the specimen.
Figure 8 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 8. Gromia winnetoui sp. nov. A, reflected-light photograph, station 121#7, ~2600-m depth; photographed in water. B, C, scanning electron microscope (SEM) photographs of the agglutinated wall (the rectangle in C indicates the area shown in D). D, SEM photograph of the perforations on the test surface.
FIGURE 6 in A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean *
FIGURE 6. Phylogenetic position of Leptammina gen. nov. inferred from partial SSU rDNA sequences using maximum likelihood method. Numbers at internal nodes correspond to bootstrap values higher than 75%.
FIGURE 4 in A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean *
FIGURE 4. Leptammina flavofusca gen. et sp. nov. A. Fresh, newly collected, and probably alive individuals, two of them with the aperture directed upwards which makes it possible to see that the peduncular sheath is funnel shaped. B. SEM photograph of entire individual. C. SEM photograph of aperture. D. SEM photograph of broken surface of the cell showing that it is built up by a cytoplasmic network of reticulopodia. E+F. SEM photographs of test surface. Scale bars: A=500 µm, B+E=200 µm, C=20 µm, D+F=2 µm. All individuals are from Stn.102#13 EBS.
FIGURE 3 in A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean *
FIGURE 3. Leptammina flavofusca gen. et sp. nov. Assemblage of individuals from Stn.102#13 EBS. A. Fresh, newly collected, and probably alive individuals. B. The same individuals after fixation in formalin. Scale bars = 1 mm.
FIGURE 5 in A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean *
FIGURE 5. Leptammina flavofusca gen. et sp. nov. A. Section through entire individual with nucleus, nucleoli, nuclear vacuole and exonuclear vacuole. B. Longitudinal section of aperture with peduncular sheath, agglutinated test material and inner organic lining. C. Section through nucleus and exonuclear vacuole, but without nuclear vacuole. D. Longitudinal section of Scale bars = 100 µm.
FIGURE 1 in A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean *
FIGURE 1. Leptammina grisea gen. et sp. nov., A–C are fresh, newly collected individuals and D are individuals fixed in formalin. E. Test wall wrinkles, probably artefacts during handling or fixation. F. Longitudinal section of entire individual with agglutinated test, inner organic lining, peduncular sheath, cytoplasm, foreign particles, and vacuoles. All individuals from Stn. 102#11 AT. Scale bars: A–D = 1 mm; E–F = 100 µm.
FIGURE 2 in A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean *
FIGURE 2. Leptammina grisea gen. et sp. nov., A + B. SEM photograph of agglutinated outer test wall. C. Aperture with peduncular sheath (stomostyle) projected by the cytoplasm along its longitudinal axis; the transition of the peduncular sheath into the inner organic lining is clearly visible at both sides. D. SEM photograph of a broken part of the cell showing pseudopodia (reticulopodia) embedding stercomata, mineral particles, and diatom frustules. E. Nucleus of the granular type with numerous nucleoli, most of the nuclear interior consists of a vacuole. F. Agglutinated lager, inner organic lining, cell content and vacuole. All individuals from Stn. 102#11 AT. Scale bars: A+F=20 µm; B=2 µm; C+E=100 µm; D=5 µm.
FIGURE 2. X in A new ' saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic)
FIGURE 2. X-ray microanalysis of a larger grain in the outer agglutinated case (specimen 1 illustrated in Plate 3, figs A–F; 0.5–1.0 cm layer of the core from Station 56859#2).
FIGURE 1. X in A new ' saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic)
FIGURE 1. X-ray microanalysis of the surface of the 'saccamminid' test (specimen illustrated in Plate 1, figs C–H; 0.5–1.0 cm layer of the core from Station 56859#2).
FIGURE 2. Reticulammina novaezelandica Tendal, 1972 in First record of a Xenophyophore (Rhizaria: Foraminifera) on the Chilean margin
FIGURE 2. Reticulammina novaezelandica Tendal, 1972 (MNHNCL PRO-15000). Details of the specimen: a, SEM view of lamellae and open spaces forming the reticulated structure. b, overview of agglutinated material. c, detail of agglutinated material showing foraminiferan and radiolarian tests and sponge spicule fragments. d, foraminiferan test. e–f, radiolarian tests; some scattered stercomata are visible in e.
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