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Loss of a globally unique kelp forest from Oman

Citation

Coleman, MA and Reddy, M and Nimbs, MJ and Marshell, A and Al-Ghassani, SA and Bolton, JJ and Jupp, BP and De Clerck, O and Leliaert, F and Champion, C and Pearson, GA and Serrao, EA and Madeira, P and Wernberg, T, Loss of a globally unique kelp forest from Oman, Scientific Reports, 12 Article 5020. ISSN 2045-2322 (2022) [Refereed Article]


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Copyright 2022 The Author(s) Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1038/s41598-022-08264-3

Abstract

Kelp forests are declining in many regions globally with climatic perturbations causing shifts to alternate communities and significant ecological and economic loss. Range edge populations are often at most risk and are often only sustained through localised areas of upwelling or on deeper reefs. Here we document the loss of kelp forests (Ecklonia radiata) from the Sultanate of Oman, the only confirmed northern hemisphere population of this species. Contemporary surveys failed to find any kelp in its only known historical northern hemisphere location, Sadah on the Dhofar coast. Genetic analyses of historical herbarium specimens from Oman confirmed the species to be E. radiata and revealed the lost population contained a common CO1 haplotype found across South Africa, Australia and New Zealand suggesting it once established through rapid colonisation throughout its range. However, the Omani population also contained a haplotype that is found nowhere else in the extant southern hemisphere distribution of E. radiata. The loss of the Oman population could be due to significant increases in the Arabian Sea temperature over the past 40 years punctuated by suppression of coastal upwelling. Climate-mediated warming is threatening the persistence of temperate species and precipitating loss of unique genetic diversity at lower latitudes.

Item Details

Item Type:Refereed Article
Keywords:climate change, CO1, decline, Ecklonia radiata, extinction, haplotype, ocean warming, phylogenetics, seaweed, upwelling
Research Division:Environmental Sciences
Research Group:Climate change impacts and adaptation
Research Field:Ecological impacts of climate change and ecological adaptation
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Marshell, A (Dr Alyssa Marshell)
ID Code:149462
Year Published:2022
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2022-03-31
Last Modified:2022-04-22
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