scholarly journals Spatial and Temporal Trends of Perfluoroalkyl Substances in Global Ocean and Coastal Waters

2021 ◽  
Author(s):  
Derek Muir ◽  
Luc T. Miaz
Keyword(s):  
Coastal Waters ◽  
Temporal Trends ◽  
Global Ocean ◽  
Perfluoroalkyl Substances ◽  
Spatial And Temporal Trends

scholarly journals Spatial and temporal trends in order richness of marine phytoplankton as a tracer for the exchange zone between coastal and open waters

2016 ◽  
Vol 97 (3) ◽  
pp. 477-489 ◽  
Author(s):  
A.S. Jung ◽  
R. Bijkerk ◽  
H.W. Van Der Veer ◽  
C.J.M. Philippart
Keyword(s):  
Particulate Matter ◽  
North Sea ◽  
Coastal Waters ◽  
Wadden Sea ◽  
Temporal Trends ◽  
Marine Phytoplankton ◽  
Environmental Drivers ◽  
Suspended Particulate ◽  
Phytoplankton Communities ◽  
Spatial And Temporal Trends

Quantifying exchange of particulate matter between coastal and open waters is an important and often unresolved issue. Here, we apply phytoplankton order richness as an innovative marine tracer to identify the geographic position of a coastal exchange zone in the SE North Sea, including its variability in time and space. Previous observations on dynamics of suspended particulate matter accumulation resulted in a hypothesized boundary between coastal waters (including the Wadden Sea) and open North Sea waters, the so-called ‘line-of-no-return’. Our study along two transects (Terschelling, Noordwijk) in the Dutch coastal zone showed seasonality patterns in phytoplankton order richness, both for diatoms and flagellates. The coastal Wadden Sea was found to be clearly different from the open North Sea, implying that seasonality in Wadden Sea phytoplankton is at least partly driven by local environmental conditions. Seasonality in flagellates was found to be more uniform than seasonality in diatoms. Stations in the coastal North Sea to a distance of 10 km (Terschelling) to 20 km (Noordwijk) from the shore appeared to be at the inside of the ‘line-of-no-return’. Our findings indicate that this approach is a useful aid in exploring mixing of particulate matter between coastal and open waters and to study the responses of phytoplankton communities to environmental drivers.

Spatial and temporal trends in perfluoroalkyl substances (PFASs) in ringed seals (Pusa hispida) from Svalbard

2016 ◽  
Vol 214 ◽  
pp. 230-238 ◽  
Author(s):  
Heli Routti ◽  
Geir Wing Gabrielsen ◽  
Dorte Herzke ◽  
Kit M. Kovacs ◽  
Christian Lydersen
Keyword(s):  
Temporal Trends ◽  
Perfluoroalkyl Substances ◽  
Ringed Seals ◽  
Pusa Hispida ◽  
Spatial And Temporal Trends

Suspect and Nontarget Screening Revealed Class-Specific Temporal Trends (2000–2017) of Poly- and Perfluoroalkyl Substances in St. Lawrence Beluga Whales

2021 ◽  
Vol 55 (3) ◽  
pp. 1659-1671
Author(s):  
Holly Barrett ◽  
Xuan Du ◽  
Magali Houde ◽  
Stéphane Lair ◽  
Jonathan Verreault ◽  
...  
Keyword(s):  
Temporal Trends ◽  
Perfluoroalkyl Substances ◽  
Beluga Whales ◽  
Nontarget Screening

Spatial and temporal trends and effects of contaminants in the Canadian Arctic marine ecosystem: a review

1999 ◽  
Vol 230 (1-3) ◽  
pp. 83-144 ◽  
Author(s):  
D Muir ◽  
B Braune ◽  
B DeMarch ◽  
R Norstrom ◽  
R Wagemann ◽  
...  
Keyword(s):  
Marine Ecosystem ◽  
Temporal Trends ◽  
Canadian Arctic ◽  
Spatial And Temporal Trends

scholarly journals Spatial Disparities of COVID-19 Cases and Fatalities in United States Counties

2021 ◽  
Vol 18 (16) ◽  
pp. 8259
Author(s):  
Sarah L. Jackson ◽  
Sahar Derakhshan ◽  
Leah Blackwood ◽  
Logan Lee ◽  
Qian Huang ◽  
...  
Keyword(s):  
United States ◽  
Great Plains ◽  
Explanatory Power ◽  
Temporal Trends ◽  
The United States ◽  
First Year ◽  
Significant Case ◽  
Urban Rural ◽  
Spatial And Temporal Trends ◽  
Mitigation Policies

This paper examines the spatial and temporal trends in county-level COVID-19 cases and fatalities in the United States during the first year of the pandemic (January 2020–January 2021). Statistical and geospatial analyses highlight greater impacts in the Great Plains, Southwestern and Southern regions based on cases and fatalities per 100,000 population. Significant case and fatality spatial clusters were most prevalent between November 2020 and January 2021. Distinct urban–rural differences in COVID-19 experiences uncovered higher rural cases and fatalities per 100,000 population and fewer government mitigation actions enacted in rural counties. High levels of social vulnerability and the absence of mitigation policies were significantly associated with higher fatalities, while existing community resilience had more influential spatial explanatory power. Using differences in percentage unemployment changes between 2019 and 2020 as a proxy for pre-emergent recovery revealed urban counties were hit harder in the early months of the pandemic, corresponding with imposed government mitigation policies. This longitudinal, place-based study confirms some early urban–rural patterns initially observed in the pandemic, as well as the disparate COVID-19 experiences among socially vulnerable populations. The results are critical in identifying geographic disparities in COVID-19 exposures and outcomes and providing the evidentiary basis for targeting pandemic recovery.

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