scholarly journals Genetic and morphological evidence of the presence of Phyllorhiza punctata in the southwestern Gulf of California (NE Pacific Ocean)

2021 ◽  
Vol 16 (4) ◽  
pp. 637-652
Author(s):  
Leonela Rosales-Catalán ◽  
Mariae Estrada-González ◽  
Crisalejandra Rivera-Pérez ◽  
Monica Sánchez ◽  
Edgar Gamero-Mora ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Gulf Of California ◽  
Morphological Evidence ◽  
Ne Pacific ◽  
Phyllorhiza Punctata

Distribution and structure of Conocarpus erectus L. (Combretaceae) in the northern limit of the Pacific Ocean (Gulf of California)

2021 ◽  
Vol 209 ◽  
pp. 105645
Author(s):  
Jonathan G. Ochoa-Gómez ◽  
Joanna Acosta-Velázquez ◽  
Carlos A. Anguamea-Valenzuela ◽  
Paulina Martinetto
Keyword(s):  
Pacific Ocean ◽  
Gulf Of California ◽  
Northern Limit ◽  
Conocarpus Erectus ◽  
The Pacific ◽  
The Pacific Ocean

scholarly journals On sampling the upper crustal reservoir of the NE Pacific Ocean

Geofluids ◽  
2006 ◽  
Vol 0 (0) ◽  
pp. 060623055813001-??? ◽  
Author(s):  
H. P. JOHNSON ◽  
J. A. BAROSS ◽  
T. A. BJORKLUND
Keyword(s):  
Pacific Ocean ◽  
Ne Pacific

Dinoflagellate cyst-based reconstructions of mid to late Holocene winter sea-surface temperature and productivity from an anoxic fjord in the NE Pacific Ocean

2011 ◽  
Vol 235 (1-2) ◽  
pp. 13-25 ◽  
Author(s):  
R. Timothy Patterson ◽  
Graeme T. Swindles ◽  
Helen M. Roe ◽  
Arun Kumar ◽  
Andreas Prokoph
Keyword(s):  
Pacific Ocean ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Late Holocene ◽  
Sea Surface ◽  
Dinoflagellate Cyst ◽  
Ne Pacific

Impact of simulated deep-sea polymetallic nodule mining on sediment and pore-water geochemistry in prospective mining areas in the NE Pacific Ocean

2020 ◽  
Author(s):  
Jessica Volz ◽  
Laura Haffert ◽  
Matthias Haeckel ◽  
Andrea Koschinsky ◽  
Sabine Kasten
Keyword(s):  
Steady State ◽  
Pacific Ocean ◽  
Deep Sea ◽  
Surface Sediments ◽  
Small Scale ◽  
Mining Activities ◽  
Mining Equipment ◽  
Geochemical Conditions ◽  
Polymetallic Nodules ◽  
Ne Pacific

<p>Industrial-scale harvesting of deep-sea mineral resources, such as polymetallic nodules, is likely to have severe consequences for the natural environment. However, the effects of mining activities on deep‑sea ecosystems, sediment geochemistry and element fluxes are still poorly understood. Predicting the environmental impact is challenging due to the scarcity of environmental baseline studies and the lack of mining trials with industrial mining equipment in the deep sea. Thus, currently we have to rely on small-scale disturbances simulating deep-sea mining activities as a first-order approximation to study the expected impacts on the abyssal environment and ecosystem.</p><p>We have investigated surface sediments in disturbance tracks of seven small-scale benthic impact experiments, which have been performed in four European contract areas for the exploration of polymetallic nodules in the Clarion-Clipperton Zone (CCZ) in the NE Pacific Ocean. These small-scale disturbance experiments were performed 1 day to 37 years prior to our sampling program in the German, Polish, Belgian and French contract areas using different disturbance devices, such as dredges and epibenthic sledges. We show that the depth distribution of solid-phase Mn in the upper 20 cm of the sediments in the CCZ provides a reliable tool for the determination of the disturbance depth. We found that the upper 5–15 cm of the sediments were removed during various small‑scale disturbance experiments in the different contract areas. Transient transport‑reaction modelling for the Polish and German contract areas reveals that the removal of the surface sediments is associated with the loss of reactive labile organic carbon. As a result, oxygen consumption rates decrease significantly after the removal of the surface sediments, and consequently, oxygen penetrates up to tenfold deeper into the sediments inhibiting denitrification and Mn(IV) reduction. Our model results show that the return to steady state geochemical conditions after the disturbance is controlled by diffusion until the reactive labile TOC fraction in the surface sediments is partly re‑established and the biogeochemical processes commence. While the re-establishment of bioturbation is essential, steady state geochemical conditions are ultimately controlled by the burial rate of organic matter. Hence, under current depositional conditions, new steady state geochemical conditions in the sediments of the CCZ are reached only on a millennium-scale even for these small-scale disturbances simulating deep-sea mining activities.</p>

scholarly journals Spatial and temporal trends in fin whale vocalizations recorded in the NE Pacific Ocean between 2003-2013

PLoS ONE ◽  
2017 ◽  
Vol 12 (10) ◽  
pp. e0186127 ◽  
Author(s):  
Michelle J. Weirathmueller ◽  
Kathleen M. Stafford ◽  
William S. D. Wilcock ◽  
Rose S. Hilmo ◽  
Robert P. Dziak ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Temporal Trends ◽  
Fin Whale ◽  
Ne Pacific ◽  
Spatial And Temporal Trends

Widespread distribution of microplastics in subsurface seawater in the NE Pacific Ocean

2014 ◽  
Vol 79 (1-2) ◽  
pp. 94-99 ◽  
Author(s):  
Jean-Pierre W. Desforges ◽  
Moira Galbraith ◽  
Neil Dangerfield ◽  
Peter S. Ross
Keyword(s):  
Pacific Ocean ◽  
Widespread Distribution ◽  
Ne Pacific
Sign in / Sign up

Export Citation Format

Share Document