Effect of episodic events on tidal mud flat stability, Ardmillan Bay, Strangford Lough, northern Ireland

1993 ◽  
pp. 378-392 ◽  
Author(s):  
Robert Kirby ◽  
Robert J. Bleakley ◽  
S. T. Colin Weatherup ◽  
Paul J. Raven ◽  
Neil D. Donaldson
Keyword(s):  
Northern Ireland ◽  
Episodic Events ◽  
Strangford Lough ◽  
Mud Flat

The extent of grazing release from epiphytism forSargassum muticum(Phaeophyceae) within the invaded range

2009 ◽  
Vol 89 (2) ◽  
pp. 303-314 ◽  
Author(s):  
James A. Strong ◽  
Christine A. Maggs ◽  
Mark P. Johnson
Keyword(s):  
Northern Ireland ◽  
Native Species ◽  
Sargassum Muticum ◽  
Saccharina Latissima ◽  
Native Range ◽  
Epiphytic Algae ◽  
Macroalgal Species ◽  
Strangford Lough ◽  
Fucus Serratus ◽  
Japan And China

The overall biotic pressure on a newly introduced species may be less than that experienced within its native range, facilitating invasion. The brown algaSargassum muticum(Yendo) Fensholt is a conspicuous and successful invasive species originally from Japan and China. We comparedS. muticumand native macroalgae with respect to the biotic pressures of mesoherbivore grazing and ectocarpoid fouling. In Strangford Lough, Northern Ireland,S. muticumthalli were as heavily overgrown with seasonal blooms of epiphytic algae as native macroalgal species were. The herbivorous amphipodDexamine spinosawas much more abundant onS. muticumthan on any native macroalga. When cultured with this amphipod,S. muticumlost more tissue than three native macroalgae,Saccharina latissima(Linnaeus) Laneet al.,Halidrys siliquosa(Linnaeus) Lyngbye andFucus serratusLinnaeus.Sargassum muticumcultured with both ectocarpoid fouling and amphipods showed a severe impact, consistent with our previous findings of large declines in the density ofS. muticumobserved in the field during the peak of fouling. Despite being a recent introduction into the macroalgal community in Strangford Lough,S. muticumappears to be under biotic pressure at least equal to that on native species, suggesting that release from grazing and epiphytism does not contribute to the invasiveness of this species in Strangford Lough.

The distribution and utilisation of Zostera species in Strangford Lough, Northern Ireland

1994 ◽  
Vol 47 (3-4) ◽  
pp. 317-328 ◽  
Author(s):  
A.A. Portig ◽  
R.G. Mathers ◽  
W.I. Montgomery ◽  
R.N. Govier
Keyword(s):  
Northern Ireland ◽  
Strangford Lough

Commercial oyster stocks as a potential source of larvae in the regeneration of Ostrea edulis in Strangford Lough, Northern Ireland

2006 ◽  
Vol 86 (1) ◽  
pp. 153-159 ◽  
Author(s):  
R.J. Kennedy ◽  
D. Roberts
Keyword(s):  
Northern Ireland ◽  
Main Body ◽  
Ostrea Edulis ◽  
Larval Release ◽  
Strangford Lough ◽  
Potential Source ◽  
In The Wild ◽  
Significant Spatial Variation ◽  
Tidal Movement ◽  
Native Oyster

Ostrea edulis was extremely rare in the wild in Strangford Lough from the early 1900s until renewed spatfall was observed at a number of sites in the 1990s. A monitoring programme was undertaken to investigate the presence and distribution of planktonic oyster larvae at nine sites around the lough between June and September in 1997 and 1998 as a precursor to studies of spatfall patterns. Larval densities at sites in the northern basin of the lough were significantly higher than those in the southern basin where larvae were lacking or in low numbers. Densities and sizes of oyster larvae showed significant temporal variation suggesting pulsed larval release. Larval densities also showed significant spatial variation with higher densities at sites closer to commercial stocks pointing to these as the main source of oyster larvae. This hypothesis was supported during a larval flux study over a complete tidal cycle which indicated a 90% net tidal movement of O. edulis larvae from the entrance of the bay where commercial stocks were held to the main body of the lough. Thus the maintenance of dense commercial stocks of flat oysters may provide the key to the redevelopment of native oyster beds in Strangford Lough and elsewhere by providing an initial broodstock nucleus from which larvae can be exported.

Environmental Impact Assessment of the Strangford Lough Tidal Power Barrage Scheme in Northern Ireland

1984 ◽  
Vol 16 (3-4) ◽  
pp. 455-462 ◽  
Author(s):  
R W G Carter ◽  
P J Newbould
Keyword(s):  
Northern Ireland ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Energy Requirements ◽  
Tidal Power ◽  
Environmental Consequences ◽  
Feeding Ground ◽  
Strangford Lough ◽  
Year 2000

A tidal power barrage on Strangford Lough, would supply about 10% of Northern Ireland's energy requirements in the year 2000. However, the Droject will have serious environmental consequences for the largely unpolluted estuary which contains rare floral and faunal elements, provides a major bird feeding ground and has considerable recreation potential. This article reviews the likely environmental impact of the project.

Sign in / Sign up

Export Citation Format

Share Document