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11 results for “Halimeda”
Fig. 1 in An Atlantic origin for the introduced species Halimeda incrassata (Bryopsidales, Chlorophyta)
Fig. 1: Distribution of Halimeda incrassata and several Indo-Pacific species that it may be confused with morphologically. The species introduced in the Mediterranean Sea is the Atlantic species and the only realistic migration pathway would have been from the Atlantic Sea through the Strait of Gibraltar.
Halimeda tuna (Bryopsidales, Ulvophyceae) calcification on the depth transect in the northern Adriatic Sea; carbonate production on the microscale of individual segments
<p>Raw data relevant to the submission of the manuscript: Halimeda tuna (Bryopsidales, Ulvophyceae) calcification on the depth transect in the northern Adriatic Sea; carbonate production on the microscale of individual segments.</p> <p>Table S1. Landmark and semilandmark coordinates of Halimeda tuna segment outlines.</p> <p>Table S2. External characteristics of H. tuna segments and associated abiotic factors.</p>
Figure 7 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 7: Aragonite crystal microstructure of the six Halimeda species examined. Images (with white scale bars = 20 µm) show the locations of primary utricles (pU) and primary inter-utricle spaces (pIUS). Higher magnification images (with black scale bars = 2 µm) of the pU – pIUS boundary show species' diversity in widths of short (<5 µm) aragonite needles (large arrows) and abundance and locations of small (<1 µm) anhedral crystals (small arrows).
Figure 6 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 6: Linear relationships between (A) average diffusion pathway length and surface diameter of primary utricles in one representative sample, (B) average diffusion pathway length and tissue mineral content (% CaCO3) in whole thalli (n = 10) and (C) average primary utricle diameter and tissue mineral content (% CaCO3) of six Halimeda species collected from Little Cayman Island. Standard deviations of the average values are reported in Table 2. Solid lines represent the linear regression best fit and dashed lines indicate the 95% confidence limit of the regression. Asterisks indicate that the regression coefficients are significant (p <0.05).
Figure 5 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 5: Examples of transmission electron microscope images from which adhesion length between adjacent primary utricles (pU), defined as diffusion pathway length, were determined from six Halimeda species collected on reefs from Little Cayman Island. The diffusion pathway can be seen to physically isolate the primary inter-utricle space (pIUS) from external seawater (S). Scale bar = 10 µm.
Figure 4 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 4: Examples of transmission electron microscope images from which surface diameters of primary utricles (pU) were determined from six Halimeda species collected on reefs from Little Cayman Island. Note aragonite crystals in the primary inter-utricle spaces (pIUS). Scale bar = 10 µm.
Figure 3 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 3: Location of the collection sites and Little Cayman Research Center (LCRC) shown as encircled multi symbol on the northern coast of Little Cayman Island in the Caribbean (inset). The three collection sites were: (A) a shallow (<2 m) back-reef lagoon ~ 250 m from LCRC, (B) a spur and groove fore-reef (~ 15 m) ~ 700 m northeast of LCRC and (C) an outer fore-reef ledge (~ 18 m) ~ 900 m northeast of LCRC.
Figure 1 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 1: Illustration of a vertical section of a Halimeda copiosa segment showing basic architecture of the outermost filaments. Note how the swollen outer filaments or primary utricles (pU) adhere, creating a physical barrier between primary inter-utricle spaces (pIUS) and external seawater (S). Artwork credit: Chris Johnson.
FIGURE 3. Acrobelione halimedae n in Parasites (Isopoda: Epicaridea and Nematoda) from ghost and mud shrimp (Decapoda: Axiidea and Gebiidea) with descriptions of a new genus and a new species of bopyrid isopod and clarification of Pseudione Kossmann, 1881
FIGURE 3. Acrobelione halimedae n. sp., mature holotype female (ZRC 1990.4330), ex Austinogebia spinfrons (Haswell, 1881). A, dorsal overview of female; B, ventral overview of female; C, right antennule and antenna; D, left barbula; E, right maxilliped, outer view; F, right oostegite 1, internal view; G, right oostegite 1, outer view; H, right pereopod 1; I, left pereopod 7; J, right pereomere 7 (Per7) and right lateral plate 1 (Lp1); K, left lateral plate 1; L, ventral view of fifth pleopods (Ple5) and uropods (Uro). Scale bars: A, B, E, F = 1 mm; C = 125 µm; D, = 250 µm; G–L = 500 µm.
Supplementary data to "Geometric morphometrics shows a close relationship between the shape features, position on thalli, and CaCO3 content of segments in Halimeda tuna (Bryopsidales, Ulvophyceae)"
<p>zenodo-landmarks: Landmark coordinates of segment outlines of Halimeda tuna used in the geometric morphometric analyses.</p> <p>zenodo-designation: Designation of individual segments in the order corresponding to the landmark data file.</p> <p>zenodo-script-shape: The script executing the multivariate linear Procrustes ANOVA model decomposing the shape data of Halimeda tuna segments into different sources.</p> <p>zenodo-script-areas: The script computing the areas of Halimeda tuna segments based on their outline morphometric data.</p> <p> </p>
Figure 2 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance
Figure 2: Photographs of the six Halimeda species examined at their natural growth sites.
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