Climate change and deepening of the North Sea fish assemblage: a biotic indicator of warming seas

2008 ◽  
Vol 45 (4) ◽  
pp. 1029-1039 ◽  
Author(s):  
Nicholas K. Dulvy ◽  
Stuart I. Rogers ◽  
Simon Jennings ◽  
Vanessa Stelzenmller ◽  
Stephen R. Dye ◽  
...  
Keyword(s):  
Climate Change ◽  
North Sea ◽  
Fish Assemblage ◽  
The North ◽  
The North Sea ◽  
Sea Fish

scholarly journals Ecotypes as a concept for exploring responses to climate change in fish assemblages

2010 ◽  
Vol 68 (3) ◽  
pp. 580-591 ◽  
Author(s):  
Georg H. Engelhard ◽  
Jim R. Ellis ◽  
Mark R. Payne ◽  
Remment ter Hofstede ◽  
John K. Pinnegar
Keyword(s):  
Climate Change ◽  
North Sea ◽  
Trophic Level ◽  
Fish Assemblages ◽  
Environmental Drivers ◽  
Trawl Survey ◽  
The North ◽  
The North Sea ◽  
Increasing Trends ◽  
Sea Fish

Abstract Engelhard, G. H., Ellis, J. R., Payne, M. R., ter Hofstede, R., and Pinnegar, J. K. 2011. Ecotypes as a concept for exploring responses to climate change in fish assemblages. – ICES Journal of Marine Science, 68: . How do species-rich fish assemblages respond to climate change or to other anthropogenic or environmental drivers? To explore this, a categorization concept is presented whereby species are assigned with respect to six ecotype classifications, according to biogeography, horizontal and vertical habitat preference, trophic guild, trophic level, or body size. These classification schemes are termed ecotypology, and the system is applied to fish in the North Sea using International Bottom Trawl Survey data. Over the period 1977–2008, there were changes in the North Sea fish community that can be related to fish ecotypes. Broadly speaking, there were steady increases in abundance of species that were either Lusitanian, small-bodied, or low-/mid-trophic-level ecotypes, and generally declining or only marginally increasing trends of most Boreal, large-bodied, or high-trophic-level ecotypes or combinations of them. The post-1989 warm biological regime appears to have favoured pelagic species more than demersal species. These community-level patterns agree with the expected responses of ecotypes to climate change and also with anticipated vulnerability to fishing pressure.

Decline in Atlantic wolffish Anarhichas lupus in the North Sea: Impacts of fishing pressure and climate change

2021 ◽  
Author(s):  
Joanna K. Bluemel ◽  
Simon Fischer ◽  
David W. Kulka ◽  
Christopher P. Lynam ◽  
Jim R. Ellis
Keyword(s):  
Climate Change ◽  
North Sea ◽  
Fishing Pressure ◽  
The North ◽  
The North Sea ◽  
Anarhichas Lupus ◽  
Atlantic Wolffish

scholarly journals Climate change effects on marine protected areas: Projected decline of benthic species in the North Sea

2021 ◽  
Vol 163 ◽  
pp. 105230
Author(s):  
Michael Weinert ◽  
Moritz Mathis ◽  
Ingrid Kröncke ◽  
Thomas Pohlmann ◽  
Henning Reiss
Keyword(s):  
Climate Change ◽  
Protected Areas ◽  
North Sea ◽  
Marine Protected Areas ◽  
Benthic Species ◽  
Climate Change Effects ◽  
The North ◽  
The North Sea

scholarly journals The effects of climate change on persistent organic pollutants (POPs) in the North Sea

2013 ◽  
Vol 10 (5) ◽  
pp. 1525-1557
Author(s):  
K. O'Driscoll ◽  
B. Mayer ◽  
J. Su ◽  
M. Mathis
Keyword(s):  
Climate Change ◽  
Organic Pollutants ◽  
North Sea ◽  
21St Century ◽  
Persistent Organic Pollutants ◽  
Global Ocean ◽  
Open Boundary ◽  
The North ◽  
The Future ◽  
The North Sea

Abstract. The fate and cycling of two selected legacy persistent organic pollutants (POPs), PCB 153 and γ-HCH, in the North Sea in the 21st century have been modelled with combined hydrodynamic and fate and transport ocean models. To investigate the impact of climate variability on POPs in the North Sea in the 21st century, future scenario model runs for three 10 yr periods to the year 2100 using plausible levels of both in situ concentrations and atmospheric, river and open boundary inputs are performed. Since estimates of future concentration levels of POPs in the atmosphere, oceans and rivers are not available, our approach was to reutilise 2005 values in the atmosphere, rivers and at the open ocean boundaries for every year of the simulations. In this way, we attribute differences between the three 10 yr simulations to climate change only. For the HAMSOM and atmospheric forcing, results of the IPCC A1B (SRES) 21st century scenario are utilised, where surface forcing is provided by the REMO downscaling of the ECHAM5 global atmospheric model, and open boundary conditions are provided by the MPIOM global ocean model. Dry gas deposition and volatilisation of γ-HCH increase in the future relative to the present. In the water column, total mass of γ-HCH and PCB 153 remain fairly steady in all three runs. In sediment, γ-HCH increases in the future runs, relative to the present, while PCB 153 in sediment decreases exponentially in all three runs, but even faster in the future, both of which are the result of climate change. Annual net sinks exceed sources at the ends of all periods.

scholarly journals Surface Heat Budget over the North Sea in Climate Change Simulations

Atmosphere ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 272 ◽  
Author(s):  
Christian Dieterich ◽  
Shiyu Wang ◽  
Semjon Schimanke ◽  
Matthias Gröger ◽  
Birgit Klein ◽  
...  
Keyword(s):  
Climate Change ◽  
Heat Flux ◽  
North Sea ◽  
Heat Budget ◽  
Coupled Model ◽  
Surface Heat ◽  
The North ◽  
The North Sea ◽  
Rcp 8.5 ◽  
Surface Heat Budget

An ensemble of regional climate change scenarios for the North Sea is validated and analyzed. Five Coupled Model Intercomparison Project Phase 5 (CMIP5) General Circulation Models (GCMs) using three different Representative Concentration Pathways (RCPs) have been downscaled with the coupled atmosphere–ice–ocean model RCA4-NEMO. Validation of sea surface temperature (SST) against different datasets suggests that the model results are well within the spread of observational datasets. The ensemble mean SST with a bias of less than 1 ∘ C is the solution that fits the observations best and underlines the importance of ensemble modeling. The exchange of momentum, heat, and freshwater between atmosphere and ocean in the regional, coupled model compares well with available datasets. The climatological seasonal cycles of these fluxes are within the 95% confidence limits of the datasets. Towards the end of the 21st century the projected North Sea SST increases by 1.5 ∘ C (RCP 2.6), 2 ∘ C (RCP 4.5), and 4 ∘ C (RCP 8.5), respectively. Under this change the North Sea develops a specific pattern of the climate change signal for the air–sea temperature difference and latent heat flux in the RCP 4.5 and 8.5 scenarios. In the RCP 8.5 scenario the amplitude of the spatial heat flux anomaly increases to 5 W/m 2 at the end of the century. Different hypotheses are discussed that could contribute to the spatially non-uniform change in air–sea interaction. The most likely cause for an increased latent heat loss in the central western North Sea is a drier atmosphere towards the end of the century. Drier air in the lee of the British Isles affects the balance of the surface heat budget of the North Sea. This effect is an example of how regional characteristics modulate global climate change. For climate change projections on regional scales it is important to resolve processes and feedbacks at regional scales.

scholarly journals Tunny Investigations made in the North Sea on Col. E. T. Peel's Yacht, “St. George,” Summer, 1933. Part I. Biometric Data

1934 ◽  
Vol 19 (2) ◽  
pp. 503-522 ◽  
Author(s):  
F. S. Russell
Keyword(s):  
North Sea ◽  
South Coast ◽  
Body Proportions ◽  
The South ◽  
Biometric Data ◽  
The North ◽  
The North Sea ◽  
Sea Fish ◽  
Made In

1. Details are given of the types of hooks lost in tunny in the North Sea in the summer of 1933.2. Data are given on the measurements made on thirty-two large migrating fish caught in the North Sea in August and September, 1933.3. In certain body proportions the tunny measured differ from those in the G4 Group (200 to 260 cm. in length) given by Heldt for fish from Tunis and by Frade for fish from Algarve on the south coast of Portugal, while in some characters they resemble the Tunis fish and in others the Algarve fish, but all the North Sea fish were between 232 and 271 cm. in length.4. It was found that there was a tendency for fish with short second dorsal fins to have short first dorsal, anal, and caudal fins, and for those with long second dorsals to have these other three fins long.5. Measurements were made to supply data on the condition of the fish.

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