The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea

Ante Žuljevic´, Akira F. Peters, Vedran Nikolic, Boris Antolic, Marija Despalatovic, Ivan Cvitkovic´, Igor Isajlovic, Hrvoje Mihanovic, Slavica Matijevic´, Dawn Margaret Shewring, Simonepietro Canese, Christos Katsaros, Frithjof C Kuepper

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Abstract

Deep-water kelps are little-known large brown algae occurring close to the lower limit of photosynthetic life in the sea. This study compares historical and recent records of the deep-water Mediterranean kelp Laminaria rodriguezii in the Adriatic Sea. Historical records include data from herbarium collections and trawling fishery expeditions in the mid-twentieth century, while recent data comprise records of the last 17 years from MEDITS expeditions, ROV surveys of historical kelp locations, benthic surveys and records by fishermen. Altogether, these findings demonstrate that the Adriatic population of L. rodriguezii has suffered a decline of more than 85 % of its historical range and is now present only around the small offshore island of Palagruža. Bottom trawling activities are presumably responsible for the disappearance elsewhere. We propose to classify L. rodriguezii as “Endangered” in the Adriatic Sea under IUCN criteria B1ab(i,iii,iv), ver 3.1. Oceanographic characteristics of the habitat suggest that besides high water transparency, presence of North Adriatic Dense Water with both strong currents and stable low temperatures of around 14 °C are essential oceanographic factors for the development of L. rodriguezii in the Central Adriatic. The origin of cold water thus differs from that at upwelling sites permitting populations of tropical deep-water kelps. The phylogenetic position of L. rodriguezii is so far unknown. DNA sequences from nuclear and cytoplasmic markers of two thalli from Croatia and the western Mediterranean confirmed that L. rodriguezii is a member of the Laminariaceae and most closely related to L. ochroleuca, L. pallida and the Brazilian deep-water kelp L. abyssalis.
Original languageEnglish
Article number69
JournalMarine Biology
Volume163
Early online date14 Mar 2016
DOIs
Publication statusPublished - Apr 2016

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Laminaria
Adriatic Sea
endangered species
macroalgae
deep water
water
dense water
bottom trawling
remotely operated vehicle
trawling
brown alga
herbarium
historical record
cold water
transparency
twentieth century
Laminariaceae
upwelling
fishery
Phaeophyceae

Keywords

  • endangered algae
  • Circalittoral
  • cox1
  • Rubisco spacer
  • ITS
  • kelp
  • bottom trawling
  • IUCN criteria

Cite this

The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea. / Žuljevic´, Ante; Peters, Akira F.; Nikolic, Vedran; Antolic, Boris ; Despalatovic, Marija ; Cvitkovic´, Ivan ; Isajlovic, Igor ; Mihanovic, Hrvoje; Matijevic´, Slavica; Shewring, Dawn Margaret; Canese, Simonepietro; Katsaros, Christos; Kuepper, Frithjof C.

In: Marine Biology, Vol. 163, 69, 04.2016.

Research output: Contribution to journalArticle

Žuljevic´, A, Peters, AF, Nikolic, V, Antolic, B, Despalatovic, M, Cvitkovic´, I, Isajlovic, I, Mihanovic, H, Matijevic´, S, Shewring, DM, Canese, S, Katsaros, C & Kuepper, FC 2016, 'The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea' Marine Biology, vol. 163, 69. https://doi.org/10.1007/s00227-016-2821-2
Žuljevic´ A, Peters AF, Nikolic V, Antolic B, Despalatovic M, Cvitkovic´ I et al. The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea. Marine Biology. 2016 Apr;163. 69. https://doi.org/10.1007/s00227-016-2821-2
Žuljevic´, Ante ; Peters, Akira F. ; Nikolic, Vedran ; Antolic, Boris ; Despalatovic, Marija ; Cvitkovic´, Ivan ; Isajlovic, Igor ; Mihanovic, Hrvoje ; Matijevic´, Slavica ; Shewring, Dawn Margaret ; Canese, Simonepietro ; Katsaros, Christos ; Kuepper, Frithjof C. / The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea. In: Marine Biology. 2016 ; Vol. 163.
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note = "Acknowledgments Thanks are due to Klaus L{\"u}ning for a gametophyte culture of L. abyssalis, and to Britta Schaffelke for a herbarium specimen of L. rodriguezii from the western Mediterranean. We are grateful to the Total Foundation (Paris) for funding this study within the framework of the project “Brown algal ecology and biodiversity in the eastern Mediterranean Sea”, and to the MASTS pooling initiative (Marine Alliance for Science and Technology for Scotland, funded by the Scottish Funding Council and contributing institutions; grant reference HR09011), as well as Croatian Ministry of Science, Education and Sports for supporting project “Benthic communities in the Adriatic Sea (Project ID: 0001005)”. Open access via Springer Compact Agreement",
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T1 - The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea

AU - Žuljevic´, Ante

AU - Peters, Akira F.

AU - Nikolic, Vedran

AU - Antolic, Boris

AU - Despalatovic, Marija

AU - Cvitkovic´, Ivan

AU - Isajlovic, Igor

AU - Mihanovic, Hrvoje

AU - Matijevic´, Slavica

AU - Shewring, Dawn Margaret

AU - Canese, Simonepietro

AU - Katsaros, Christos

AU - Kuepper, Frithjof C

N1 - Acknowledgments Thanks are due to Klaus Lüning for a gametophyte culture of L. abyssalis, and to Britta Schaffelke for a herbarium specimen of L. rodriguezii from the western Mediterranean. We are grateful to the Total Foundation (Paris) for funding this study within the framework of the project “Brown algal ecology and biodiversity in the eastern Mediterranean Sea”, and to the MASTS pooling initiative (Marine Alliance for Science and Technology for Scotland, funded by the Scottish Funding Council and contributing institutions; grant reference HR09011), as well as Croatian Ministry of Science, Education and Sports for supporting project “Benthic communities in the Adriatic Sea (Project ID: 0001005)”. Open access via Springer Compact Agreement

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N2 - Deep-water kelps are little-known large brown algae occurring close to the lower limit of photosynthetic life in the sea. This study compares historical and recent records of the deep-water Mediterranean kelp Laminaria rodriguezii in the Adriatic Sea. Historical records include data from herbarium collections and trawling fishery expeditions in the mid-twentieth century, while recent data comprise records of the last 17 years from MEDITS expeditions, ROV surveys of historical kelp locations, benthic surveys and records by fishermen. Altogether, these findings demonstrate that the Adriatic population of L. rodriguezii has suffered a decline of more than 85 % of its historical range and is now present only around the small offshore island of Palagruža. Bottom trawling activities are presumably responsible for the disappearance elsewhere. We propose to classify L. rodriguezii as “Endangered” in the Adriatic Sea under IUCN criteria B1ab(i,iii,iv), ver 3.1. Oceanographic characteristics of the habitat suggest that besides high water transparency, presence of North Adriatic Dense Water with both strong currents and stable low temperatures of around 14 °C are essential oceanographic factors for the development of L. rodriguezii in the Central Adriatic. The origin of cold water thus differs from that at upwelling sites permitting populations of tropical deep-water kelps. The phylogenetic position of L. rodriguezii is so far unknown. DNA sequences from nuclear and cytoplasmic markers of two thalli from Croatia and the western Mediterranean confirmed that L. rodriguezii is a member of the Laminariaceae and most closely related to L. ochroleuca, L. pallida and the Brazilian deep-water kelp L. abyssalis.

AB - Deep-water kelps are little-known large brown algae occurring close to the lower limit of photosynthetic life in the sea. This study compares historical and recent records of the deep-water Mediterranean kelp Laminaria rodriguezii in the Adriatic Sea. Historical records include data from herbarium collections and trawling fishery expeditions in the mid-twentieth century, while recent data comprise records of the last 17 years from MEDITS expeditions, ROV surveys of historical kelp locations, benthic surveys and records by fishermen. Altogether, these findings demonstrate that the Adriatic population of L. rodriguezii has suffered a decline of more than 85 % of its historical range and is now present only around the small offshore island of Palagruža. Bottom trawling activities are presumably responsible for the disappearance elsewhere. We propose to classify L. rodriguezii as “Endangered” in the Adriatic Sea under IUCN criteria B1ab(i,iii,iv), ver 3.1. Oceanographic characteristics of the habitat suggest that besides high water transparency, presence of North Adriatic Dense Water with both strong currents and stable low temperatures of around 14 °C are essential oceanographic factors for the development of L. rodriguezii in the Central Adriatic. The origin of cold water thus differs from that at upwelling sites permitting populations of tropical deep-water kelps. The phylogenetic position of L. rodriguezii is so far unknown. DNA sequences from nuclear and cytoplasmic markers of two thalli from Croatia and the western Mediterranean confirmed that L. rodriguezii is a member of the Laminariaceae and most closely related to L. ochroleuca, L. pallida and the Brazilian deep-water kelp L. abyssalis.

KW - endangered algae

KW - Circalittoral

KW - cox1

KW - Rubisco spacer

KW - ITS

KW - kelp

KW - bottom trawling

KW - IUCN criteria

U2 - 10.1007/s00227-016-2821-2

DO - 10.1007/s00227-016-2821-2

M3 - Article

VL - 163

JO - Marine Biology

JF - Marine Biology

SN - 0025-3162

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ER -