Laminaria abyssalis
Scientific classification Edit this classification
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Clade: Stramenopiles
Phylum: Gyrista
Subphylum: Ochrophytina
Class: Phaeophyceae
Order: Laminariales
Family: Laminariaceae
Genus: Laminaria
Species:
L. abyssalis
Binomial name
Laminaria abyssalis
A.B.Joly & E.C.Oliveira

Laminaria abyssalis is a species of brown kelp, notable for its connection to rhodolith beds in the Brazilian coastline.[1]

Distribution and ecology

Laminaria abyssalis is native to the Atlantic Ocean, off the coast of Brazil. It resides in a habitat spanning over 33,000 km2 (13,000 sq mi), from upper Espírito Santo to Mid Rio de Janeiro. It thrives in the waters of the continental shelf and intertidal zone, at depths of 40 to 120 m (130 to 390 ft). The majority of these kelp take root in Rhodolith beds; substrates formed by nodules of calcareous algae.[2]

Morphology

The stipe of the Laminaria abyssalis averaged out to be 14.3 centimeters in length, with an average width of 0.7 centimeters. The stipe supports an undivided blade, averages out to a length of 241 centimeters, width of 68 centimeters, and thickness of 0.65 centimeters. The holdfast which attaches Laminaria abyssalis to the rhodolith bed it resides in has an average of 4 root-like extensions, each averaging to 13.5 centimeters in length.[3]

History

Laminaria abyssalis was first discovered in 1967 by A. B. Joly and E. C. Oliveira, who found it in the Brazilian Coastline.[4]

A later expedition was made by Quége N in 1988 to determine the many locations in which Laminaria abyssalis grows along Brazil.[5]

As of lately, the kelp has been in a semi-endangered state, as sand trawling has become more common in Brazilian waters. This has disrupted the rhodolith beds in which Laminaria abyssalis grows, causing the kelp to slightly die out. The RESTORESEAS project has begun collecting data and making experiments to preserve the lives of these kelps.[4]

References

  1. ↑ Anderson, A. B.; Assis, J.; Batista, M. B.; Serrão, E. A.; Guabiroba, H. C.; Delfino, S. D. T.; Pinheiro, H. T.; Pimentel, C. R.; Gomes, L. E. O.; Vilar, C. C.; Bernardino, A. F.; Horta, P.; Ghisolfi, R. D.; Joyeux, J. C. (2021). "Global warming assessment suggests the endemic Brazilian kelp beds to be an endangered ecosystem". Marine Environmental Research. 168: 105307. Bibcode:2021MarER.16805307A. doi:10.1016/j.marenvres.2021.105307. PMID 33984550. S2CID 233517702.
  2. ↑ Quége, N. (1988). Laminaria (Phaeophyta) No Brasil, Uma Perspectiva Econômica (Master's thesis). Univ. de S. Paulo.
  3. ↑ Marins, Bianca V.; Amado-Filho, Gilberto M.; Barreto, Maria B. B.; Longo, Leila L. (January 2012). "Taxonomy of the southwestern Atlantic endemic kelp: Laminaria abyssalis and Laminaria brasiliensis (Phaeophyceae, Laminariales) are not different species". Phycological Research. 60 (1): 51–60. doi:10.1111/j.1440-1835.2011.00635.x. ISSN 1322-0829. S2CID 54740623.
  4. 1 2 "One of the world's most threatened ecosystems ‹ Restoreseas". 28 June 2022. Retrieved 2023-02-09.
  5. ↑ Casella, Paulo Borba (2010-01-01). "BRIC - Brasil, Rússia, Índia, China e África do Sul: uma perspectiva". Revista da Faculdade de Direito, Universidade de São Paulo. 105: 435. doi:10.11606/issn.2318-8235.v105i0p435-472. ISSN 2318-8235.
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