scholarly journals Ice seals as sentinels for algal toxin presence in the Pacific Arctic and subarctic marine ecosystems

2021 ◽  
Author(s):  
Alicia M. Hendrix ◽  
Kathi A. Lefebvre ◽  
Lori Quakenbush ◽  
Anna Bryan ◽  
Raphaela Stimmelmayr ◽  
...  
Keyword(s):  
Marine Ecosystems ◽  
The Pacific ◽  
Algal Toxin

scholarly journals Dynamical connections between large marine ecosystems of austral South America based on numerical simulations

Ocean Science ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 271-290 ◽  
Author(s):  
Karen Guihou ◽  
Alberto R. Piola ◽  
Elbio D. Palma ◽  
Maria Paz Chidichimo
Keyword(s):  
South America ◽  
Interannual Variability ◽  
Large Scale ◽  
Marine Ecosystem ◽  
Outer Part ◽  
Marine Ecosystems ◽  
Seasonal And Interannual Variability ◽  
Magellan Strait ◽  
The Pacific ◽  
Large Marine Ecosystem

Abstract. The Humboldt Large Marine Ecosystem (HLME) and Patagonian Large Marine Ecosystem (PLME) are the two largest marine ecosystems in the Southern Hemisphere and are respectively located along the Pacific and Atlantic coasts of southern South America. This work investigates the exchange between these two LMEs and its seasonal and interannual variability by employing numerical model results and offline particle-tracking algorithms. Our analysis suggests a general poleward transport on the southern region of the HLME, a well-defined flux from the Pacific to the Atlantic, and equatorward transport on the PLME. Lagrangian simulations show that the majority of the southern PS waters originate from the upper layer in the southeast South Pacific (<200 m), mainly from the southern Chile and Cape Horn shelves. The exchange takes place through the Le Maire Strait, Magellan Strait, and the shelf break. These inflows amount to a net northeastward transport of 0.88 Sv at 51∘ S in the southern PLME. The transport across the Magellan Strait is small (0.1 Sv), but due to its relatively low salinity it greatly impacts the density and surface circulation of the coastal waters of the southern PLME. The water masses flowing into the Malvinas Embayment eventually reach the PLME through the Malvinas Shelf and occupy the outer part of the shelf. The seasonal and interannual variability of the transport are also addressed. On the southern PLME, the interannual variability of the shelf exchange is partly explained by the large-scale wind variability, which in turn is partly associated with the Southern Annular Mode (SAM) index (r=0.52).

Passive acoustic monitoring of marine ecosystems in the Pacific Islands Region.

2009 ◽  
Vol 125 (4) ◽  
pp. 2547-2547 ◽  
Author(s):  
Marc O. Lammers ◽  
Kevin Wong ◽  
Russell E. Brainard ◽  
Whitlow W. L. Au ◽  
Pollyanna Fisher‐Pool
Keyword(s):  
Pacific Islands ◽  
Acoustic Monitoring ◽  
Marine Ecosystems ◽  
Passive Acoustic Monitoring ◽  
The Pacific ◽  
Passive Acoustic

scholarly journals Dynamical Connections between Large Marine Ecosystems of Austral South America based on numerical simulations

2019 ◽  
Author(s):  
Karen Guihou ◽  
Alberto R. Piola ◽  
Elbio D. Palma ◽  
Maria Paz Chidichimo
Keyword(s):  
Interannual Variability ◽  
Large Scale ◽  
Marine Ecosystem ◽  
Outer Part ◽  
Marine Ecosystems ◽  
Large Marine Ecosystems ◽  
Wind Variability ◽  
Magellan Strait ◽  
The Pacific ◽  
Large Marine Ecosystem

Abstract. The Humboldt Large Marine Ecosystem (HLME) and Patagonian Large Marine Ecosystem (PLME) are the two largest marine ecosystems of the Southern Hemisphere, respectively located along the Pacific and Atlantic coasts of southern America. This work investigates the exchange between these two LMEs and its variability, employing numerical model results and offline particle tracking algorithms. 27 years of a 1/12° ROMS configuration (CMM) show a general poleward transport on the Southern region of HLME, and equatorward on the Patagonian Shelf (PS). A mean transport across Cape Horn's shelf (68.1° W) is 0.95 Sv. Lagrangian simulations show that the majority of the southern PS waters originate from the upper layer in the southeast South Pacific (> 200 m), mainly from the southern Chile and Cape Horn shelves. The exchange takes place through Le Maire Strait, Magellan Strait, and the shelf-break. These inflows account to a net northeastward transport of 0.88 Sv at 51° S in the southern PLME. The transport across Magellan strait is small (0.1 Sv) but due to its relatively low salinity it impacts greatly the density and surface circulation of the coastal waters of the southern PLME. The water masses flowing into the Malvinas Embayment eventually reach the PLME through the Malvinas Shelf and occupy the outer part of the shelf. The seasonal and interannual variability of the transport are also addressed. On the southern PLME, the interannual variability of the shelf exchange is partly explained by the large-scale wind variability, which in turn is partly associated with the SAM index (r = 0.52).

Trace element occurrence in the Pacific oyster Crassostrea gigas from coastal marine ecosystems in Italy

Chemosphere ◽  
2017 ◽  
Vol 187 ◽  
pp. 248-260 ◽  
Author(s):  
E.A.V. Burioli ◽  
S. Squadrone ◽  
C. Stella ◽  
C. Foglini ◽  
M.C. Abete ◽  
...  
Keyword(s):  
Trace Element ◽  
Crassostrea Gigas ◽  
Pacific Oyster ◽  
Marine Ecosystems ◽  
Coastal Marine ◽  
The Pacific ◽  
Coastal Marine Ecosystems

The Philological Association of The Pacific Coast

PMLA ◽  
1935 ◽  
Vol 50 (4) ◽  
pp. 1373-1374
Keyword(s):  
Annual Meeting ◽  
Pacific Coast ◽  
Stanford University ◽  
The Pacific

The thirty-seventh annual meeting of the Philological Association of the Pacific Coast was held at Stanford University, California, on November 29 and 30, 1935.

A scanning electron microscopic study of the veliger larvae of the scallop argopecten purpuratus

1988 ◽  
Vol 46 ◽  
pp. 284-285
Author(s):  
G.C. Bellolio ◽  
K.S. Lohrmann ◽  
E.M. Dupré
Keyword(s):  
Morphological Description ◽  
Electron Microscopic ◽  
Larval Stages ◽  
Scanning Electron Microscopic Study ◽  
The Pacific ◽  
Argopecten Purpuratus ◽  
Veliger Larvae ◽  
20 Nm ◽  
Ethanol Series ◽  
Scanning Electron

Argopecten purpuratus is a scallop distributed in the Pacific coast of Chile and Peru. Although this species is mass cultured in both countries there is no morphological description available of the development of this bivalve except for few characterizations of some larval stages described for culture purposes. In this work veliger larvae (app. 140 pm length) were examined by the scanning electron microscope (SEM) in order to study some aspects of the organogenesis of this species.Veliger larvae were obtained from hatchery cultures, relaxed with a solution of MgCl2 and killed by slow addition of 21 glutaraldehyde (GA) in seawater (SW). They were fixed in 2% GA in calcium free artificial SW (pH 8.3), rinsed 3 times in calcium free SW, and dehydrated in a graded ethanol series. The larvae were critical point dried and mounted on double scotch tape (DST). To permit internal view, some valves were removed by slightly pressing and lifting the tip of a cactus spine wrapped with DST, The samples were coated with 20 nm gold and examined with a JEOL JSM T-300 operated at 15 KV.

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