Halimeda is a genus of green macroalgae. The algal body (thallus) is composed of calcified green segments. Calcium carbonate is deposited in its tissues, making it inedible to most herbivores. However one species, Halimeda tuna, was described as pleasant to eat with oil, vinegar, and salt.[3][4]
As in other members of the order Bryopsidales, individual organisms are made up of single multi-nucleate cells. Whole meadows may consist of a single individual alga connected by fine threads running through the substrate.[5]
Halimeda is responsible for distinctive circular deposits in various parts of the Great Barrier Reef on the north-east coast of Queensland, Australia.[6]Halimeda beds form in the western or lee side of outer shield reefs where flow of nutrient-rich water from the open sea allows them to flourish,[7] and are the most extensive, actively accumulating Halimeda beds in the world.
The genus is one of the best studied examples of cryptic species pairs due to morphological convergence within the marine macroalgae.
[8][9][10]
Some species grow so vigorously in tropical lagoons that the sediment is composed solely of the remains of their tissues, forming a calcareous "Halimeda sand". In fact some tropical reef systems, such as atolls, consist largely of Halimeda sand accumulated over the aeons.[11] Overall, Halimeda represents the most common green algea large grains in the sediment of the lower latitudes.[12]
^Hillis, L.W. (2001). "The calcareous reef alga Halimeda (Chlorophyta, Byropsidales): a cretaceous genus that diversified in the cenozoic". Palaeogeography, Palaeoclimatology, Palaeoecology. 166 (1–2): 89–100. Bibcode:2001PPP...166...89H. doi:10.1016/s0031-0182(00)00203-0. ISSN 0031-0182.
^Guiry, M.D.; Guiry, G.M. (2007). "Genus: Halimeda taxonomy browser". AlgaeBase version 4.2 World-wide electronic publication, National University of Ireland, Galway. Retrieved 2007-09-24.
^Bauhin, Jean; Cherler, Johann Heinrich (1651). "Liber XXXIX". Historia plantarum [...] Tomus III (in Latin). Ebroduni. p. 803. OCLC 495081149. Archived from the original (PDF) on 16 February 2018. Retrieved 15 February 2018. Nà Theophraftus (1. cap. hist. c. 12) scribit circa Opuntem herbulam effe quandam, quae ex foliis radicem mittat, ac cum suauitate mandi possit. Plinius verò ipsum sequutus (21.cap.17) circa Opuntem, inquit, Opuntia est herba, etiam homini-dulcis: mirúmque è folio ejus radicem sièri, ac sic eam nasci. Et certè credibile est hanc plantam recentem cum aceto, sale, & oleo, vel etiam sine sale, non minùs suauiter edi posse quàm Portulacae marinae & sìmilium folia.
^Hills-Colinvaux, Llewellya (27 May 1980). Baxter, J.H.S.; Russell, Frederick S.; Yonge, Maurice (eds.). Ecology and Taxonomy of Halimeda: Primary Producer of Coral Reefs(PDF). Vol. 17. Academic Press. pp. 17–18. ISBN 9780080579405. OCLC 476214112. Retrieved 15 February 2018. {{cite book}}: |journal= ignored (help)
^The Cell Biology of the Bryopsidales
^McNeil, Mardi A.; Webster, Jody M.; Beaman, Robin J.; Graham, Trevor L. (December 2016). "New constraints on the spatial distribution and morphology of the Halimeda bioherms of the Great Barrier Reef, Australia". Coral Reefs. 35 (4): 1343–1355. Bibcode:2016CorRe..35.1343M. doi:10.1007/s00338-016-1492-2. ISSN 0722-4028. S2CID 253816764.
^McNeil, Mardi; Nothdurft, Luke; Erler, Dirk; Hua, Quan; Webster, Jody M. (February 2021). "Variations in Mid‐ to Late Holocene Nitrogen Supply to Northern Great Barrier Reef Halimeda Macroalgal Bioherms". Paleoceanography and Paleoclimatology. 36 (2). doi:10.1029/2020PA003871. ISSN 2572-4517. S2CID 234158224.
^Kooistra W.H.C.F., Coppejans E.G.G. & Payri C. (2002). Molecular systematics, historical ecology, and phylogeography of Halimeda. (Bryopsidales) Molecular Phylogenetics and Evolution 24: 121–138
^Verbruggen H., De Clerck O., Kooistra W.H.C.F. & Coppejans E. (2005). Molecular and morphometric data pinpoint species boundaries in Halimeda section Rhipsalis (Bryopsidales, Chlorophyta). Journal of Phycology 41: 606-621
^Verbruggen H., De Clerck O., Schils T., Kooistra W.H.C.F. & Coppejans E. (2005). Evolution and phylogeography of Halimeda section Halimeda. Molecular Phylogenetics and Evolution 37: 789-803
^Hoek, Christiaan; Mann, David; Jahns, H.M. (1995). Algae: An Introduction to Phycology. Cambridge University Press. p. 434. ISBN 978-0-521-31687-3.
^Bialik, Or M.; Coletti, Giovanni; Mariani, Luca; Commissario, Lucrezi; Desbiolles, Fabien; Meroni, Agostino Niyonkuru (2023-11-11). "Availability and type of energy regulate the global distribution of neritic carbonates". Scientific Reports. 13 (1): 19687. doi:10.1038/s41598-023-47029-4. ISSN 2045-2322. PMC 10640608. PMID 37952059.
Halimeda is a genus of green macroalgae. The algal body (thallus) is composed of calcified green segments. Calcium carbonate is deposited in its tissues...
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produced by myriad plants (e.g., coralline algae, species of the green algae Halimeda) and animals (e.g., coral, molluscs, foraminifera). Small amounts of silicate...
mainly by hardgrounds, while the rest of the bank is mostly covered by thin Halimeda sediments. Beacon Cay is the largest islet in the Bank. It is overbuilt...
fragments and the remains of coralline algae such as the green-segmented genus Halimeda can add to the reef's ability to withstand damage from storms and other...
algae or seaweed live on the reef, including thirteen species of genus Halimeda, which deposit calcareous mounds up to 100 metres (110 yd) wide, creating...
by Aspergillus versicolor, an endophytic fungus found in the green alga Halimeda opuntia in the Red Sea. Hawas, U. W.; El-Beih, A. A.; El-Halawany, A. M...
places exceeding 75% LCC on the shallow reef platforms. Coralline algae, Halimeda and coral rubble were the three other dominant cover categories. The windward...
the University of Michigan; her thesis titled "A Revision of the Genus Halimeda (order Siphonales)" was published in 1959. As a graduate student, she did...
and the common tree frog. Aquatic plants are represented by red algae, Halimeda, seagrass, and plant plankton. There are more than 100 species of birds...
species was a female collected among a small group of algae of the genus Halimeda. Gay, Jeremy (25 September 2023). "Two New Species of Gobies Described...
1038/s41561-021-00699-z. S2CID 232052381. Retrieved 3 October 2022. Kilbourne, Kelly Halimeda; et, al. (17 February 2022). "Atlantic circulation change still uncertain"...
novel features some Hispanic and Native American themes. Codi's sister, Halimeda "Hallie", moves to Nicaragua to teach local people more sustainable farming...
skeleton from minerals, called test in some groups. Many green algae, such as Halimeda and the Dasycladales, and some red algae, the Corallinales, encase their...
455L. doi:10.1038/s41558-022-01342-4. S2CID 248385988. Kilbourne, Kelly Halimeda; et, al. (17 February 2022). "Atlantic circulation change still uncertain"...
deposits are found in the Dry Tortugas, consisting mainly of disarticulated Halimeda plates. Between the Dry Tortugas and Key West is a 39 ft (12 m) thick example...
area had growths of hydroids, sea fans, a range of hard corals and some Halimeda. Greenfield, D. & Munroe, T.A. (2016). "Paraxenisthmus cerberusi". The...
Lithothamnion and Porolithon colour many coral reefs purple-red and the green alga Halimeda is found throughout the sea. The coastal plants consisting of only about...
colonial hydrozoans (Lytocarpus and Antennellopsis), coralline algae (Halimeda), and sea fans (Muricella, Annella, and Acanthogorgia). This combined with...
exhibit similar blade characteristics of other genera such as Flabellia and Halimeda. In some, blades lacking cortex, appearing as a brush may resemble Rhipocephalus...
of coral rubble, sand, with turf and fleshy algae. Coralline algae and Halimeda were less abundant than at Nikumaroro or McKean. The most abundant coral...
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