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6 results for “coralline red algae”
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>
Data from: Efficient carbon recycling between calcification and photosynthesis in red coralline algae
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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).
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