scholarly journals Seasonal dynamics of mesozooplankton biomass over a sub‐Arctic continental shelf

2021 ◽  
Author(s):  
Marc J. Silberberger ◽  
Paul E. Renaud ◽  
Ketil Eiane ◽  
Henning Reiss
Keyword(s):  
Continental Shelf ◽  
Seasonal Dynamics ◽  
Mesozooplankton Biomass

scholarly journals Seasonal Dynamics of Dissolved Organic Carbon Under Complex Circulation Schemes on a Large Continental Shelf: The Northern South China Sea

2017 ◽  
Vol 122 (12) ◽  
pp. 9415-9428 ◽  
Author(s):  
Feifei Meng ◽  
Minhan Dai ◽  
Zhimian Cao ◽  
Kai Wu ◽  
Xiaozheng Zhao ◽  
...  
Keyword(s):  
Organic Carbon ◽  
South China Sea ◽  
Dissolved Organic Carbon ◽  
Continental Shelf ◽  
South China ◽  
Seasonal Dynamics ◽  
Northern South China Sea ◽  
China Sea

Seasonal dynamics of the carbonate system under complex circulation schemes on a large continental shelf: the northern South China Sea

2021 ◽  
pp. 102630
Author(s):  
Wei Yang ◽  
Xianghui Guo ◽  
Zhimian Cao ◽  
Yi Xu ◽  
Lifang Wang ◽  
...  
Keyword(s):  
South China Sea ◽  
Continental Shelf ◽  
South China ◽  
Seasonal Dynamics ◽  
Northern South China Sea ◽  
Carbonate System ◽  
China Sea

scholarly journals Propagation of the 2014–2016 Northeast Pacific Marine Heatwave Through the Salish Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Tarang Khangaonkar ◽  
Adi Nugraha ◽  
Su Kyong Yun ◽  
Lakshitha Premathilake ◽  
Julie E. Keister ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Elevated Temperatures ◽  
Zooplankton Biomass ◽  
Direct Result ◽  
Biogeochemical Model ◽  
Nutrient Loads ◽  
Salish Sea ◽  
Northeast Pacific ◽  
Mesozooplankton Biomass ◽  
Estuarine Exchange

Effects and impacts of the Northeast Pacific marine heatwave of 2014–2016 on the inner coastal estuarine waters of the Salish Sea were examined using a combination of monitoring data and an established three-dimensional hydrodynamic and biogeochemical model of the region. The anomalous high temperatures reached the U.S. Pacific Northwest continental shelf toward the end of 2014 and primarily entered the Salish Sea waters through an existing strong estuarine exchange. Elevated temperatures up to + 2.3°C were observed at the monitoring stations throughout 2015 and 2016 relative to 2013 before dissipating in 2017. The hydrodynamic and biogeochemical responses to this circulating high-temperature event were examined using the Salish Sea Model over a 5-year window from 2013 to 2017. Responses of conventional water-quality indicator variables, such as temperature and salinity, nutrients and phytoplankton, zooplankton, dissolved oxygen, and pH, were evaluated relative to a baseline without the marine heatwave forcing. The simulation results relative to 2014 show an increase in biological activity (+14%, and 6% Δ phytoplankton biomass, respectively) during the peak heatwave year 2015 and 2016 propagating toward higher zooplankton biomass (+14%, +18% Δ mesozooplankton biomass). However, sensitivity tests show that this increase was a direct result of higher freshwater and associated nutrient loads accompanied by stronger estuarine exchange with the Pacific Ocean rather than warming due to the heatwave. Strong vertical circulation and mixing provided mitigation with only ≈+0.6°C domain-wide annual average temperature increase within Salish Sea, and served as a physical buffer to keep waters cooler relative to the continental shelf during the marine heatwave.

Biology of an active methane seep on the Oregon continental shelf

1993 ◽  
Vol 95 ◽  
pp. 287-294
Author(s):  
AR Juhl ◽  
GL Taghon
Keyword(s):  
Continental Shelf ◽  
Methane Seep

Seasonal dynamics of zooplankton resource use revealed by carbon amino acid stable isotope values

2015 ◽  
Vol 531 ◽  
pp. 143-154 ◽  
Author(s):  
JM Nielsen ◽  
M Winder
Keyword(s):  
Amino Acid ◽  
Stable Isotope ◽  
Resource Use ◽  
Seasonal Dynamics ◽  
Acid Stable

Isotopic characterization of lifetime movement by two demersal fishes from the northeastern Gulf of Mexico

2021 ◽  
Vol 657 ◽  
pp. 161-172
Author(s):  
JL Vecchio ◽  
JL Ostroff ◽  
EB Peebles
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Life Histories ◽  
Linear Mixed Model ◽  
Trophic Position ◽  
Eye Lens ◽  
Outer Continental Shelf ◽  
Red Grouper ◽  
Lens Diameter ◽  
Isotopic Characterization

An understanding of lifetime trophic changes and ontogenetic habitat shifts is essential to the preservation of marine fish species. We used carbon and nitrogen stable isotope values (δ13C and δ15N) recorded within the laminar structure of fish eye lenses, reflecting both diet and location over time, to compare the lifetime trends of 2 demersal mesopredators. Tilefish Lopholatilus chamaeleonticeps inhabit burrows on the outer continental shelf, which results in exceptional site fidelity. Red grouper Epinephelus morio are spawned on the middle to outer continental shelf, move to the inner shelf for the juvenile period, and return offshore upon sexual maturity. Both species inhabit the eastern Gulf of Mexico, a region with a distinctive offshore-inshore gradient in background δ13C values. Within individual tilefish (n = 36), sequences of δ13C values and δ15N values had strong, positive correlations with eye-lens diameter, and strong correlations between the 2 isotopes (mean Spearman r = 0.86), reflecting an increase in trophic position with growth and little lifetime movement. In red grouper (n = 30), δ15N values positively correlated with eye-lens diameter, but correlations between δ15N and δ13C were weak (mean Spearman r = 0.29), suggesting cross-shelf ontogenetic movements. Linear mixed model results indicated strong relationships between δ15N and δ13C values in tilefish eye lenses but no convergence in the red grouper model. Collectively, these results are consistent with previously established differences in the life histories of the 2 species, demonstrating the potential utility of eye-lens isotope records, particularly for investigating the life histories of lesser-known species.

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