Dictyota sandvicensis explained

Dictyota sandvicensis also called limu 'Alani in Hawaiian, is a species of brown seaweed in the family Dictyotaceae endemic to the Hawaiian Islands.^{[1] [2]}

Description

Dictyota sandvicensis reaches up to 15 cm in height, and has a iridescent yellow greenish color.^[3] They can be easily spotted from other species of Dictyota in Hawai'i because they have small branches that break out from the edges of the main branches. Dictyota sandvicensis consists of a single basal thallus that is firmly rooted and can support rhizoids. The rhizoids lead to one to several erect fronds 1-5 mm wide.

Distribution

Dictiyota sandvicensis is endemic to Hawaii and occurs throughout the Hawaiian Islands.

Habitat

Dictiyota sandvicensis can be founded in mid- to low-tide pools, on low intertidal benches and on reef flats growing on rocks or as epiphytes on other algae in shallow waters up to 7m depth.^[4]

Nutrition & cultural significance

Limu is a regular part of the diet and is considered to contain more vitamins and essential mineral nutrients than other staple food items.^[5] Dictyota sandvicensis icontainins proteins, lipids, carbohydrates, minerals, and vitamins and has a caloric content of over cal g-1 ash-free dry weight. In Hawaii, D. sandvicensis is one of many species of limu that have traditionally been harvested from the shores.^[6]

Notes and References

1. Book: Huisman . John M. . Hawaiian reef plants . Abbott . Isabella Aiona . Smith . Celia M. . 2007 . Univ. of Hawai'i Sea Grant College Program . 978-1-929054-04-6 . Honolulu.
2. Web site: WoRMS - World Register of Marine Species - Dictyota sandvicensis Sonder, 1859 . 2022-09-09 . www.marinespecies.org.
3. Book: Abbott . Isabella Aiona . Marine green and brown algae of the Hawaiian Islands . Huisman . John M. . 2004 . Bishop Museum Press . Bernice Pauahi Bishop Museum . 978-1-58178-030-7 . Bishop Museum bulletin in botany . Honolulu, Hawaiʻi.
4. Kuba . Gabrielle M. . Spalding . Heather L. . Hill-Spanik . Kristina M. . Fullerton . Heather . 2021-10-27 . Campbell . Barbara J. . Microbiota-Macroalgal Relationships at a Hawaiian Intertidal Bench Are Influenced by Macroalgal Phyla and Associated Thallus Complexity . mSphere . en . 6 . 5 . e0066521 . 10.1128/mSphere.00665-21 . 2379-5042 . 8550217 . 34550007.
5. McDermid . Karla J. . Stuercke . Brooke . 2003-11-01 . Nutritional composition of edible Hawaiian seaweeds . Journal of Applied Phycology . en . 15 . 6 . 513–524 . 10.1023/B:JAPH.0000004345.31686.7f . 2003JAPco..15..513M . 1573-5176.
6. Cox . T. E. . Foster . M. S. . 2013-05-15 . The effects of storm-drains with periodic flows on intertidal algal assemblages in 'Ewa Beach (O'ahu), Hawai'i . Marine Pollution Bulletin . 70 . 1 . 162–170 . 10.1016/j.marpolbul.2013.02.029 . 23535190 . 2013MarPB..70..162C . 0025-326X.