scholarly journals Climate-induced changes in the North Sea Decapoda over the last 60 years

2010 ◽  
Vol 42 (3) ◽  
pp. 257-264 ◽  
Author(s):  
JA Lindley ◽  
RR Kirby
Keyword(s):  
North Sea ◽  
The North ◽  
The North Sea ◽  
Induced Changes

scholarly journals Warm-water decapods and the trophic amplification of climate in the North Sea

2010 ◽  
Vol 6 (6) ◽  
pp. 773-776 ◽  
Author(s):  
J. A. Lindley ◽  
G. Beaugrand ◽  
C. Luczak ◽  
J.-M. Dewarumez ◽  
R. R. Kirby
Keyword(s):  
North Sea ◽  
Warm Water ◽  
Climate Signal ◽  
Southern North Sea ◽  
The North ◽  
Ecosystem Shift ◽  
The North Sea ◽  
Induced Changes ◽  
Water Species

A long-term time series of plankton and benthic records in the North Sea indicates an increase in decapods and a decline in their prey species that include bivalves and flatfish recruits. Here, we show that in the southern North Sea the proportion of decapods to bivalves doubled following a temperature-driven, abrupt ecosystem shift during the 1980s. Analysis of decapod larvae in the plankton reveals a greater presence and spatial extent of warm-water species where the increase in decapods is greatest. These changes paralleled the arrival of new species such as the warm-water swimming crab Polybius henslowii now found in the southern North Sea. We suggest that climate-induced changes among North Sea decapods have played an important role in the trophic amplification of a climate signal and in the development of the new North Sea dynamic regime.

scholarly journals North Sea ecosystem change from swimming crabs to seagulls

2012 ◽  
Vol 8 (5) ◽  
pp. 821-824 ◽  
Author(s):  
C. Luczak ◽  
G. Beaugrand ◽  
J. A. Lindley ◽  
J-M. Dewarumez ◽  
P. J. Dubois ◽  
...  
Keyword(s):  
Food Web ◽  
North Sea ◽  
Terrestrial Ecosystems ◽  
Ecosystem Change ◽  
Sea Temperature ◽  
The North ◽  
The North Sea ◽  
Important Food Source ◽  
Induced Changes ◽  
Swimming Crabs

A recent increase in sea temperature has established a new ecosystem dynamic regime in the North Sea. Climate-induced changes in decapods have played an important role. Here, we reveal a coincident increase in the abundance of swimming crabs and lesser black-backed gull colonies in the North Sea, both in time and in space. Swimming crabs are an important food source for lesser black-backed gulls during the breeding season. Inhabiting the land, but feeding mainly at sea, lesser black-backed gulls provide a link between marine and terrestrial ecosystems, since the bottom-up influence of allochthonous nutrient input from seabirds to coastal soils can structure the terrestrial food web. We, therefore, suggest that climate-driven changes in trophic interactions in the marine food web may also have ensuing ramifications for the coastal ecology of the North Sea.

scholarly journals Interpreting the large fish indicator for the Celtic Sea

2011 ◽  
Vol 68 (9) ◽  
pp. 1963-1972 ◽  
Author(s):  
Samuel Shephard ◽  
David G. Reid ◽  
Simon P. R. Greenstreet
Keyword(s):  
North Sea ◽  
Fish Community ◽  
Small Fish ◽  
Large Fish ◽  
The North ◽  
The North Sea ◽  
Celtic Sea ◽  
Using Data ◽  
Induced Changes ◽  
The Relationship

Abstract Shephard, S., Reid, D. G., and Greenstreet, S. P. R. 2011. Interpreting the large fish indicator for the Celtic Sea. – ICES Journal of Marine Science, 68: 1963–1972. The large fish indicator (LFI) was developed in the North Sea as a size-based indicator of fish community state. It is now established as OSPAR's fish community Ecological Quality Objective (EcoQO) metric and will be applied across all OSPAR regions. To produce a protocol for use when developing regional LFIs, the North Sea experience is interpreted using data from the Celtic Sea. Differences in fish community species composition and size distribution were reflected in a different species complex and large fish threshold (50 cm) for the Celtic Sea LFI. However, a lag of 12–14 years in the relationship between assemblage-averaged fishing mortality Fcom,y and the LFI suggested similar underlying ecological mechanisms to the North Sea. The indicator responded to changes in small fish biomass that follow fishing-induced changes in the level of predation by large demersal piscivores. The Celtic Sea LFI showed maximum observed values >0.40 before 1990, and 0.40 is here proposed as an EcoQO. Development of regional LFIs demands a flexible process rather than a strictly prescriptive protocol.

Sign in / Sign up

Export Citation Format

Share Document