scholarly journals Deciphering the composite morphological diversity of Lophelia pertusa , a cosmopolitan deep‐water ecosystem engineer

Ecosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
Author(s):  
Giovanni Sanna ◽  
André Freiwald
Keyword(s):  
Deep Water ◽  
Ecosystem Engineer ◽  
Morphological Diversity ◽  
Lophelia Pertusa ◽  
Water Ecosystem

scholarly journals pH up-regulation as a potential mechanism for the cold-water coral <i>Lophelia pertusa</i> to sustain growth in aragonite undersaturated conditions

2015 ◽  
Vol 12 (23) ◽  
pp. 6869-6880 ◽  
Author(s):  
M. Wall ◽  
F. Ragazzola ◽  
L. C. Foster ◽  
A. Form ◽  
D. N. Schmidt
Keyword(s):  
Deep Water ◽  
Cold Water ◽  
Isotope Analysis ◽  
Lophelia Pertusa ◽  
Ambient Seawater ◽  
Skeletal Morphology ◽  
Composition And Structure ◽  
Ph Conditions ◽  
Water Ecosystems ◽  
Water Coral

Abstract. Cold-water corals are important habitat formers in deep-water ecosystems and at high latitudes. Ocean acidification and the resulting change in aragonite saturation are expected to affect these habitats and impact coral growth. Counter to expectations, the deep water coral Lophelia pertusa has been found to be able to sustain growth even in undersaturated conditions. However, it is important to know whether such undersaturation modifies the skeleton and thus its ecosystem functioning. Here we used Synchrotron X-Ray Tomography and Raman spectroscopy to examine changes in skeleton morphology and fibre orientation. We combined the morphological assessment with boron isotope analysis to determine if changes in growth are related to changes in control of calcification pH. We compared the isotopic composition and structure formed in their natural environment to material grown in culture at lower pH conditions. Skeletal morphology is highly variable but shows no distinctive differences between natural and low pH conditions. Raman investigations found no difference in macromorphological skeletal arrangement of early mineralization zones and secondary thickening between the treatments. The δ11B analyses show that L. pertusa up-regulates the internal calcifying fluid pH (pHcf) during calcification compared to ambient seawater pH and maintains a similar elevated pHcf at increased pCO2 conditions. We suggest that as long as the energy is available to sustain the up-regulation, i.e. individuals are well fed, there is no detrimental effect to the skeletal morphology.

Description of a new deep-water species of Alpheus Fabricius, 1798 from the Gulf of Mexico (Crustacea, Decapoda, Alpheidae)

Zootaxa ◽  
2011 ◽  
Vol 2925 (1) ◽  
pp. 49 ◽  
Author(s):  
ARTHUR ANKER ◽  
MARTHA NIZINSKI
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Deep Water ◽  
Species Group ◽  
Depth Range ◽  
Lophelia Pertusa ◽  
Western Atlantic ◽  
Northern Gulf Of Mexico ◽  
Deep Water Species ◽  
Water Species

A new deep-water species of the snapping shrimp genus Alpheus Fabricius, 1798 is described from two offshore localities in the northern Gulf of Mexico, south of Louisiana. Alpheus lentiginosus n. sp. belongs to the A. macrocheles (Hailstone, 1835) species group and is most closely related to the western Atlantic A. pouang Christoffersen, 1979 and A. amblyonyx Chace 1972, the eastern Atlantic A. platydactylus Coutière, 1897 and A. macrocheles (Hailstone, 1835), and perhaps also to the eastern Pacific A. exilis Kim & Abele, 1988. The new species is associated with deep-water soft sediments adjacent to clusters of Lophelia pertusa (L.) (Scleractinia) or mud-covered rocks and cobble, at a depth range of 336–438 m, thus representing the deepest-known record of the Alpheidae in the Gulf of Mexico and the entire western Atlantic.

A new polychelidan lobster from the Alpine Lower Jurassic of southeastern Switzerland

2020 ◽  
Vol 296 (1) ◽  
pp. 29-40
Author(s):  
Denis Audo ◽  
Heinz Furrer
Keyword(s):  
Deep Water ◽  
New Genus ◽  
Sedimentary Rocks ◽  
Morphological Diversity ◽  
Lower Jurassic ◽  
New Taxon ◽  
Decapod Crustaceans ◽  
New Genus And Species ◽  
Taxonomic Assignment ◽  
Mode Of Life

Polychelidan lobsters are a group of decapod crustaceans which, in terms of both numbers of species and morphology, were more diverse during the Triassic and Jurassic than their modern representatives (Polychelidae). Here a new genus and species from the Lower Jurassic of Switzerland, Angusteryon oberlii, is described. The new taxon is characterised by a particularly narrow cephalo- thoracic shield, which is an unusual trait in comparison to all other polychelidan lobsters, both fossil and extant. It is tentatively assigned to the Coleiidae here. A. oberlii nov. gen., nov. sp. was recovered from hemipelagic sedimentary rocks, suggesting that it inhabited a deep-water setting. Although there is a possibility that the present specimens could be parautochthonous, the small size of the ocular incisions may indicate that A. oberlii nov. gen., nov. sp. had either reduced vision or was blind, which could be explained by its having inhabited a deep-water habitat. If our views on this mode of life and taxonomic assignment are correct, this would suggest convergent degeneration of vision between the new taxon and the Polychelidae. Furthermore, features of the newly collected specimen augment the apparent morphological diversity displayed by polychelidan lobsters early in their history, as well as document a more substantial decrease of such since the Triassic and Jurassic than previously recorded.

scholarly journals Development of High Yielding Deep Water Rice Variety BRRI dhan91 for Semi Deep Flooded Ecosystem of Bangladesh

2020 ◽  
Vol 23 (1) ◽  
pp. 57-63
Author(s):  
A K M Shalahuddin ◽  
A S M Masuduzzaman ◽  
M M Emam Ahmed ◽  
T L Aditya ◽  
M S Kabir
Keyword(s):  
Plant Height ◽  
Water Depth ◽  
Deep Water ◽  
Rice Plant ◽  
Rice Variety ◽  
Submergence Tolerance ◽  
Breeding Line ◽  
Water Ecosystem ◽  
Rice Ecosystem ◽  
And Control

Deep water rice ecosystem represents the flood-prone rice ecosystem where rice plant requires elongation ability to reach the surface with a certain amount of plant height to withstand in stagnant flood water condition. Low yield potentiality of locally adapted deep water cultivars limits the total rice production in the country. In present study, efforts were made to evaluate the suitability and adaptability of newly developed high yielding deep water breeding line BR10230-15-27-7B and control variety Fulkori under semi deep water ecosystem of farmer’s field condition in three consecutive years. At six locations, water depth varied from 60 to 140 cm under semi deep water ecosystem. In 2016 and 2017, mean yield of the line ranged between 2.9 to 3.1 t ha-1 while 1.7 t ha-1 for the local control variety Fulkori. However, around 1.0 t/ha yield advantage was found for the newly developed breeding line. Thus, the higher yield potentiality of the breeding line under 140 cm water depth conditions suggested its suitability under shallow flooded environments. During final evaluation in 2018, larger variation was observed in terms of grain yield ranging from 1.1 to 3.8 t ha-1 for the line while 0.4 to 1.7 t ha-1 for the control variety when evaluated under actual deep water areas. This result also supported that this line have greater potentiality under shallow flooded condition. In addition, the breeding line exhibited similar plant height with at least six days earliness compared to the control variety. Finally, National Seed Board (NSB) approved this line as variety and designated as BRRI dhan91 for broadcast Aman (B. Aman) season. In future, this new rice variety could help the local rice growers to cultivate modern high yielding rice variety in shallow flooded environments. BRRI dhan91 also showed better performance for tallness with lodging tolerance, submergence tolerance and moderate elongation ability under shallow flooded conditions. Bangladesh Rice j. 2019, 23(1): 57-63

The distribution of the coral Lophelia pertusa (L.) [L. prolifera (Pallas)] in the north-east Atlantic

1979 ◽  
Vol 59 (1) ◽  
pp. 149-164 ◽  
Author(s):  
J. B. Wilson
Keyword(s):  
Deep Water ◽  
Lophelia Pertusa ◽  
East Atlantic ◽  
North East ◽  
The North ◽  
Water Coral

A compilation has been made of new data on the distribution of the deep-water coralLophelia pertusa(L.) derived from trawling records, grab and dredge stations and submersible dives, together with the few published records. The coral is widely distributed and occurs on all the offshore banks of the north-east Atlantic, with some records from the deepest water of the Minches and Sea of the Hebrides.

scholarly journals Unravelling the versatile feeding and metabolic strategies of the cold-water ecosystem engineer Spongosorites coralliophaga (Stephens, 1915)

2018 ◽  
Vol 141 ◽  
pp. 71-82 ◽  
Author(s):  
Georgios Kazanidis ◽  
Dick van Oevelen ◽  
Bart Veuger ◽  
Ursula F.M. Witte
Keyword(s):  
Cold Water ◽  
Ecosystem Engineer ◽  
Water Ecosystem ◽  
Metabolic Strategies

scholarly journals DEEP-WATER CORALS IN ATLANTIC CANADA: A REVIEW OF DFO RESEARCH (2001-2003)

2007 ◽  
Vol 44 (1) ◽  
Author(s):  
Donald C. Gordon, Jr. ◽  
Ellen L. R. Kenchington
Keyword(s):  
Deep Water ◽  
Natural Habitat ◽  
Quantitative Information ◽  
Atlantic Canada ◽  
Average Height ◽  
Lophelia Pertusa ◽  
Associated Fauna ◽  
Conservation Areas ◽  
Reef Complex ◽  
Black Corals

Deep-water corals occur in Atlantic Canada at water depths in the general range of 200-1500 m. Prior to 2000, most knowledge of deep-water corals was anecdotal and based primarily on  fishing bycatch information. During 2001-2003, in collaboration with university colleagues, the Department of Fisheries and Oceans (DFO) at the Bedford Institute of Oceanography investigated the distribution, abundance, habitat and biology of deep-water corals and their associated fauna under funding provided in part by the Environmental Studies Research Fund. Data were gathered from DFO groundfish surveys, the Fisheries Observer Program, interviews with fishers and dedicated research cruises with specialized imaging and sampling equipment. Nineteen coral taxa were collected or observed alive in their natural habitat; 6 Alcyonacea (soft corals), 7 Gorgonacea (horny corals), 5 Scleractinia (stony corals), and 1 Antipatharia (black corals). The results confirmed earlier observations that the Northeast Channel, the Gully and the Stone Fence are prime coral habitats. The first documented Lophelia reef complex in Atlantic Canada was found near the Stone Fence in the mouth of the Laurentian Channel. The distribution of deep-water corals is patchy and influenced by several environmental factors including substrate, temperature, salinity and currents. The average height of Primnoa and Paragorgia colonies was 30 and 57 cm. At their estimated growth rates of 1.7 and 1 cm /year, respectively, the largest Primnoa colony observed was about 61 years old while the largest Paragorgia colony was about 180 years old. Deep-water corals host a rich associated fauna, and 114 taxa have been identified to date on Paragorgia and Primnoa in Atlantic Canada. Numerous species of fish have also been observed associated with deep-water corals, the most abundant being redfish. Damage from fishing gear was found to be most extensive at the Lophelia reef complex at the Stone Fence. A lower level of fishing damage was observed in the Northeast Channel while few indications of damage were observed in the Gully. The results of this program have been used by DFO to create coral conservation areas at the Northeast Channel (424 km2) and Stone Fence (15 km2) that are closed to bottom-fishing activities. Substantial knowledge gaps still exist, in particular quantitative information of deep-water corals at depths below 500 m, and these are being addressed by continuing collaborative research by DFO and universities.Les coraux abyssaux sont communs au Canada atlantique à des profondeurs allant de 200 à 1 500 m. Avant 2000, la plupart des données sur les coraux abyssaux étaient de nature anecdotique et fondées principalement sur des données sur les prises accessoires lors d’activités de pêche. De 2001 à 2003, des chercheurs de l’Institut océanographique de Bedford du ministère des Pêches et des Océans (MPO), en collaboration avec des collègues du milieu universitaire, ont étudié la répartition, l’abondance, l’habitat et la biologie des coraux abyssaux et des espèces qui leurs sont associées dans le cadre d’un projet financé en partie par le Fonds pour l’étude de l’environnement. Leschercheurs ont recueilli des données obtenues dans le cadre de relevés du poisson de fond menés par le MPO, du Programme des observateurs des pêches, d’entrevues avec des pêcheurs et de croisières de recherche à bord de bateaux munis d’un équipement spécialisé d’échantillonnage et d’imagerie. Au total, 19 taxons de coraux ont été recueillis ou observés vivants dans leur habitat naturel : 6 Alcyonacea (coraux moux), 7 Gorgonacea (coraux cornés), 5 Scleractinia (coraux durs) et 1 Antipatharia (coreaux noirs). Les résultats confirment les observations antérieures selon lesquelles le chenal Nord‑Est, le Goulet et le secteur de Stone Fence constituent des habitats de grande qualité pour les coraux. Le premier récif de Lophelia pertusa découvert au Canada atlantique est situé à proximité du secteur de Stone Fence, à l’embouchure du chenal Laurentien. La distribution des coraux abyssaux est éparse et dépend deplusieurs facteurs environnementaux, y compris le substrat, la température, la salinité et les courants. La hauteur moyenne des colonies de Primnoa et de Paragorgia observées était respectivement de 30 et de 57 cm. D’après les taux de croissance estimés à 1,7 (Primnoa) et 1 cm/année (Paragorgia), la plus grande colonie de Primnoa observée était âgée d’environ 61 ans, tandis que la plus grande colonie de Paragorgia avait environ 180 ans. Les coraux abyssaux sont les hôtes d’une riche faune associée. Jusqu’à maintenant 114 taxons différents ont été identifiés sur les colonies de Paragorgia et de Primnoa au Canada atlantique. De nombreuses espèces de poissons ont également étéobservées en association avec les coraux abyssaux, la plus abondante étant le sébaste. Les plus importants dommages causés par des engins de pêche ont été observés au récif de Lophelia dans le secteur de Stone Fence. Des dommages moins importants attribuables à la pêche ont été observés dans le chenal Nord‑Est, et peu d’indices de dommages ont été signalés dans le Goulet. Le MPO a utilisé les résultats du présent projet pour créer des zones de conservation des coraux dans le chenal Nord‑Est (424 km2) et dans le secteur de Stone Fence (15 km2) où les activités de pêche de fond sont maintenant interdites. Il existe encore des lacunes considérables dans les données, en particulier dans le cas des données quantitatives sur les coraux abyssaux à plus de 500 m de profondeur, et ces lacunes continuent d’être comblées par le biais des recherches conjointes menées par le MPO et des universités. 

‘Patch’ development of the deep-water coral Lophelia Pertusa (L.) on Rockall Bank

1979 ◽  
Vol 59 (1) ◽  
pp. 165-177 ◽  
Author(s):  
J. B. Wilson
Keyword(s):  
Deep Water ◽  
Lophelia Pertusa ◽  
East Atlantic ◽  
North East ◽  
Water Coral

Submersible observations have been made on‘ patches’ of the deep-water coral Lophelia pertusa (L.) occurring on Rockall Bank, north-east Atlantic. It is suggested that an initial colony gives rise to a ring of younger colonies. These in turn give rise to further rings of colonies, thus enlarging the ‘patch’. The transition from stage to stage depends on portions of living colonies, weakened by clionid sponge attacks, breaking off and falling away from the colony so providing the substrate for the development of later colonies, thus enabling lateral increase in the size of the ‘patch’ to take place.

Sign in / Sign up

Export Citation Format

Share Document