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37 results for “coralline algae”
Tara Pacific 16S rRNA ASV table for bacterial communities of crustose coralline algae from the Tuamotu archipelago (French Polynesia)
<p>This data is the result of the primary analysis of the 16S rRNA gene sequencing data collected from the CCA samples collected during the Tara Pacific expedition. The analysis was conducted using cutadapt/snakemake/dada2 and usearch. A full README is contained within the parent data upload (<a href="https://doi.org/10.5281/zenodo.4451892">https://doi.org/10.5281/zenodo.4451892</a>).</p>
Fig. 4 in The first identification of fossil Mesophyllum in accordance to the modern taxonomic concepts in coralline algae
Fig. 4. Coralline alga Mesophyllum crassiusculum (Foslie, 1902) Lebednik, 2004 from early Serravallian, Miocene, Modrý Majer, Slovakia. A. Carposporophyte, NHM B1858 (TS 918-7), carposporangial conceptacle with central pedestal (arrow). B. Bi/tetrasporophyte, NHM B1857/2a (counterpart of the TS 918-1). B1. Multiporate sporangial conceptacle, arrows point to the rounded epithallial cells located at the top of conceptacle roof. Rounded cell at the margin of the pore canal marks the surface of the roof. Adjacent pore canal cells are therefore considered as rosette cells. Note that rosette cells are not sunken. B2. Asexuate conceptacle with roof filaments and pore canal filaments consisting of at least 6 cells, arrows point to thinner (black arrow) and wider (white arrow) pore canal cells. C. Bi/tetrasporophyte, NHM B1857/1a (TS 918-1). C1. Asexuate multiporate conceptacle with roof filaments consisting of up to 7 cells. C2. Detail of C1 with pore lining cells (arrows), the cells are same or wider (top of the pore canal) than adjacent roof cells. C3. Embedded asexuate conceptacles (arrow). Note chambers filed with adventitious cells. The roofs are convex to flat, lacking peripheral rim.
Fig. 5 in The first identification of fossil Mesophyllum in accordance to the modern taxonomic concepts in coralline algae
Fig. 5. Coralline alga Mesophyllum crassiusculum (Foslie, 1902) Lebednik, 2004 bi/tetrasporophyte, early Langhian, Miocene, Kosihovce, Slovakia. Schaleková's collection, NHM B1859 (TS IIIb455). A1. Thallus morphology, growth form is encrusting with weak protuberances. A2. Coaxial to non-coaxial hypothallus (arrow). A3. Epithallial cells rounded or flattened (arrow). A4. Lateral cell fusions of the cells in adjacent filaments (arrow). A5. Pore canal anatomy, lining cells are same as adjacent roof cells (black arrow) or thinner near the base (white arrow). A6. Pore canal anatomy, lining cells are thinner than adjacent roof cells in some portions of the pore canal filaments. Arrows point to the center of the pore canal.
Fig. 3 in The first identification of fossil Mesophyllum in accordance to the modern taxonomic concepts in coralline algae
Fig. 3. Coralline alga Mesophyllum crassiusculum (Foslie, 1902) Lebednik, 2004 from early Serravallian, Miocene, Modrý Majer, Slovakia, male gametophyte, NHM B1857/1b (TS 918-1). A. Conceptacles of the type 1 (Johansen, 1981) were protruding above thallus surface during their maturity. Note the coaxial arrangment of the hypothallus; arrow points to the coaxial hypothallus. B. Conceptacle filled with material of unknown origin (arrow).
Fig. 2 in The first identification of fossil Mesophyllum in accordance to the modern taxonomic concepts in coralline algae
Fig. 2. Corallinae alga Mesophyllum crassiusculum (Foslie, 1902) Lebednik, 2004 from early Serravallian, Miocene, Modrý Majer, Slovakia. A. Bi/tetrasporophyte and male gametophyte, NHM B1857/1a and NHM B1857/1b (TS 918-1), respectively. An asexuate (tetra/bisporangial) plant (white arrow) overgrows a fragment of scleractinian coral colony. Growth form of coralline alga is encrusting. Male gametophyte overgrows tetrasporophyte (black arrow). B. Carposporophyte, NHM B1858 (TS 918-7). Carpogonial-carposporangial plant of M. crassiusculum (black arrow) overgrows a protuberant rhodolith of Phymatolithon calcareum (Pallas, 1766) (white arrow). Growth form of M. crassiusculum is encrusting and without protuberances. C. Bi/tetrasporophyte, NHM B1857/1a (TS 918-1). C1. Applanately branching thallus (arrows). C2. Pseudoparenchymatous thallus with coaxially to non-coaxially arranged hypothallus. Arrow points to the portion where coaxial hypothallus is best visible. C3. Magnified portion of the thallus from C2, arrows point to cell fusions in hypothallus and in the perithallus. C4. Flattened epithallial cells above meristematic cells located at the top of the embedded conceptacle.
Linked collectors and determiners for: Artsprosjektet 43-15, Norway's hidden marine biodiversity: The hunt for cryptic species within the coralline algae.
Natural history specimen data linked to collectors and determiners held within, "Artsprosjektet 43-15, Norway's hidden marine biodiversity: The hunt for cryptic species within the coralline algae". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/aef3c42a-7545-439e-bf29-9e0ff95f9ae0">https://bionomia.net/dataset/aef3c42a-7545-439e-bf29-9e0ff95f9ae0</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/aef3c42a-7545-439e-bf29-9e0ff95f9ae0">https://gbif.org/dataset/aef3c42a-7545-439e-bf29-9e0ff95f9ae0</a>. Formatted as a Frictionless Data package.
Data from: Temperature amplifies the effect of high CO2 on the photosynthesis, respiration and calcification of the coralline algae Phymatolithon lusitanicum
The combination of ocean acidification (OA) and global warming is expected to have a significant effect on the diversity and functioning of marine ecosystems, particularly on calcifying algae such as rhodoliths (maërl) that form extensive beds worldwide, from polar to tropical regions. In addition, the increasing frequency of extreme events, such as heatwaves, threaten coastal ecosystems and may affect their capacity to fix blue carbon. The few studies where the simultaneous effects of both temperature and CO2 were investigated have revealed contradictory results. To assess the effect that high temperature spells can have on the maërl beds under OA, we tested the short-time effects of temperature and CO2 on the net photosynthesis, respiration and calcification of the recently described species Phymatolithon lusitanicum, the most common maërl species of southern Portugal. Photosynthesis, calcification and respiration increased with temperature, and the differences among treatments were enhanced under high CO2. We found that in the short term, the metabolic rates of Phymatolithon lusitanicum will increase with CO2 and temperature as will the coupling between calcification and photosynthesis. However, under high CO2, this coupling will favor photosynthesis over calcification, which, in the long term, can have a negative effect on the blue carbon fixing capacity of the maërl beds from southern Portugal.
Data from: Efficient carbon recycling between calcification and photosynthesis in red coralline algae
<p>Red coralline algae create abundant, spatially vast, reef ecosystems throughout our coastal oceans with significant ecosystem service provision, but our understanding of their basic physiology is lacking. In particular, the balance and linkages between carbon-producing and carbon-sequestering processes remain poorly constrained, with significant implications understanding their role in carbon sequestration and storage. Using a dual radioisotope tracing, we provide evidence for coupling between photosynthesis (which requires CO2) and calcification (which releases CO2) in the red coralline alga Boreolithothamnion soriferum (previously Lithothamnion soriferum) – a marine ecosystem engineer widely distributed across Atlantic mid-high latitudes. Of the sequestered HCO3-, 38±22% was deposited as carbonate skeleton whilst 39±14% was incorporated into organic matter via photosynthesis. Only 38±2% of the sequestered HCO3- was transformed into CO2, and almost 40% of that was internally recycled as photosynthetic substrate, reducing the net release of carbon to 23±3% of the total uptake. Calcification rate was strongly dependent on photosynthetic substrate production, supporting the presence of photosynthetically-enhanced calcification. The efficient carbon-recycling physiology reported here suggests that calcifying algae may not be as important in marine system CO2 release as is currently assumed, supporting a reassessment of their role in blue carbon accounting.</p>
Tolerance of coralline algae to ocean warming and marine heatwaves
<p>Ocean warming (OW) and marine heatwaves (MHWs) rapidly transform marine ecosystems, especially when they impact keystone or foundation species. Foundation species such as kelps, fucoids and corals are highly sensitive to heat stress, which threatens the future of temperate seaweed forests and tropical reefs. However, functioning and resilience of these systems also rely on the less conspicuous coralline algae, whose thermal tolerances have gone largely untested. Here, we examined the sensitivity of four temperate coralline algal morphotypes from three different species to four realistic present-day and future OW and MHW scenarios (ambient [16°C constant]; ambient+MHW [16°C baseline + a symmetric two-week heatwave with a peak intensity of 18.7°C]; future [18.7°C constant]; future+MHW [18.7°C baseline + a symmetric two-week heatwave with a peak intensity of 21.4°C]). Photo-physiology (e.g., Fv/Fm) and calcification physiology (e.g., proxies for calcifying fluid saturation state Ω CF ) were generally unaffected by the treatments, implying a high thermo-tolerance of our study species compared to other important marine foundation species. We ascribe this mainly to their photosynthetic apparatus that, unlike in other photoautotrophs, continued to function under heat stress. Experimental evidence presented here and elsewhere implies that coralline algae are likely to continue to play their crucial ecological roles in a warming ocean. Yet, such predictions are fraught with uncertainty due to the substantial gaps in our knowledge. We attempt to highlight some of these gaps and aim to present potential physiological underpinnings of their thermo-tolerance.</p>
Data from: Efficient carbon recycling between calcification and photosynthesis in red coralline algae
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Data from: Temperature amplifies the effect of high CO2 on the photosynthesis, respiration and calcification of the coralline algae Phymatolithon lusitanicum
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Tolerance of coralline algae to ocean warming and marine heatwaves
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Data from: High abundances of crustose coralline algae inside cryptic coral habitats linked to coral reef functioning
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Raman data for "Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification"
<p>This file contains the Raman data and code for "Flow-driven micro-scale pH variability affects the physiology of corals and coralline algae under ocean acidification" by Comeau et al. in Scientific Reports. Run the file, "run.R" in R to reproduce the analysis.</p> <p>Please see the published paper for methods and details: https://doi.org/10.1038/s41598-019-49044-w</p>
Raman data for "Resistance of corals and coralline algae to ocean acidification: physiological control of calcification under natural pH variability"
<p>This file contains the Raman data and code for "Resistance of corals and coralline algae to ocean acidification: physiological control of calcification under natural pH variability" by Cornwall et al. in Proceedings of the Royal Society B. Run the file, "run.R" in R to reproduce the analysis.</p> <p>Please see the published paper for methods and details: <a href="https://doi.org/10.1098/rspb.2018.1168">https://doi.org/10.1098/rspb.2018.1168</a></p>
FIGURE 6–9. Lithophyllum stictaeforme. FIGURE 6 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURE 6–9. Lithophyllum stictaeforme. FIGURE 6. External morphology (RB 587134). Scale bar = 1 cm. FIGURE 7. Longitudinal section showing monomerous thallus construction (white arrow) (RB 587135). Scale bar = 100 μm. FIGURE 8. Longitudinal section showing a single layer of rounded to elliptical epithallial cells (e), subepithallial initials (s) and secondary pit connections between adjacent filaments (white arrow) (RB 587135). Scale bar = 10 μm. FIGURE 9. Longitudinal section through a tetrasporangial conceptacle showing
FIGURE 10–13. Hydrolithon reinboldii. FIGURE 10 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURE 10–13. Hydrolithon reinboldii. FIGURE 10. External morphology (RB 493708). Scale bar = 1 cm. FIGURE 11. Longitudinal section showing a single layer of rounded epithallial cells (e), subepithallial initials (s) and cell fusions between adjacent filaments (white arrow) (RB 493709) Scale bar = 100 μm. FIGURE 12. Magnified view of a tetrasporangial conceptacle roof showing the enlarged cells (E, white arrow) lining the pore canal and the pore canal opening sunken slightly below the thallus surface (black arrow) (RB 493709). Scale bar = 10 μm. FIGURE 13. Longitudinal section through a tetrasporangial conceptacle showing zonately divided tetrasporangia (te) (RB 493709). Scale bar = 50 μm.
FIGURES 2–5. Lithophyllum corallinae. FIGURE 2 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURES 2–5. Lithophyllum corallinae. FIGURE 2. External morphology (RB 587132). Scale bar = 1 cm. FIGURE 3. Longitudinal section showing dimerous thallus construction (white arrow) (RB 587133). Scale bar = 100 μm. FIGURE 4. Longitudinal section showing a single layer of rounded to elliptical epithallial cells (e), subepithallial initials (s) and secondary pit connections between adjacent filaments (white arrow) (RB 587133). Scale bar = 20 μm. FIGURE 5. Longitudinal section through a tetrasporangial conceptacle showing the
FIGURE 1 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURE 1. Ilha Grande Bay with study sites: Rochedo de São Pedro (1), Parcel dos Meros (2), Flechas Island (3), Ponta do Acaiá (4) Queimada Grande Island (5), Jorge Grego Island (6) and Comprida Island (7).
FIGURE 15 in Sporolithon yoneshigueae sp. nov. (Sporolithales, Corallinophycidae, Rhodophyta), a new rhodolith-forming coralline alga from the southwest Atlantic
FIGURE 15. Phylogenetic tree inferred from ML, MP, and NJ analyses with SSU sequences for 19 specimens from the orders Sporolithales and Hapalidiales. Values at nodes represent percentage of 1,000 bootstrap replicates for ML (left), MP (middle) and NJ (right). Branches lacking values received <70 % support.
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International Brain Laboratory public data
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