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Impact and distribution of bottom trawl fishing on mud-bottom Communities in the Kattegat
- Source :
- Pommer, C D, Olesen, M & Hansen, J L S 2016, ' Impact and distribution of bottom trawl fishing on mud-bottom Communities in the Kattegat ', Marine Ecology-Progress Series, vol. 548, pp. 47-60 . https://doi.org/10.3354/meps11649, Pommer, C D, Olesen, M & Hansen, J L S 2016, ' Impact and distribution of bottom trawl fishing on mud-bottom communities in the Kattegat ', Marine Ecology-Progress Series, vol. 548, pp. 47-60 . https://doi.org/10.3354/meps11649
- Publication Year :
- 2016
-
Abstract
- The Kattegat in the inner Danish waters has been trawled for at least 80 yr, but so far only few attempts have been made to quantify the trawl effort, its spatial distribution and its potential ecological impact on the benthic fauna. GIS-analyses of VMS-data from trawling in the Kattegat by both Danish (2005-2009) and Swedish (2007-2009) vessels show that 95% of all trawling occurs below 22 m depth. Most activity takes place on homogeneous benthic habitats with muddy sediment at depths below the halocline and with almost the same salinity across the entire area. Furthermore, the estimate of trawled area demonstrated that the habitats are nearly 100% impacted, and frequencies of trawling beneath 100 m depth can reach 20 events per year. Multivariate analysis of community composition could not discriminate between lightly trawled and heavily trawled areas. However, a strong habitat selectivity of the trawl activity and inter-correlation between trawl activity and depth-related community structures complicated interpretation of the results. Species with biological traits previously categorized as sensitive to physical disturbance showed higher abundance in areas with low trawl activity compared to areas with higher activity. Thus, the Kattegat has been impacted to an extent where areas with reference conditions for certain habitats below 22 m no longer exist. Consequently, it is unknown how the benthic communities would have appeared without trawl disturbance and, thus, difficult to determine the impact of continued disturbance.
- Subjects :
- 0106 biological sciences
PENNATULA-PHOSPHOREA
trawl impact
DIFFERENT HABITATS
Distribution (economics)
01 natural sciences
Vessel monitoring system
Nephrops norvegicus
Aquatic science
soft-bottom
Ecology
biology
SPECIES RICHNESS
ECOSYSTEM FUNCTION
SOUTHERN NORTH-SEA
BENTHIC COMMUNITIES
LIFE-CYCLE ASSESSMENT
Oceanography
SPATIAL-DISTRIBUTION
benthic community
Kattegat
Fishing
vessel monitoring system
Aquatic Science
ECOLOGY
010603 evolutionary biology
Benthos
SDG 7 - Affordable and Clean Energy
SDG 14 - Life Below Water
Vessel monitoring systems
Ecology, Evolution, Behavior and Systematics
business.industry
010604 marine biology & hydrobiology
Sediment
physical disturbance
habitat degradation
biology.organism_classification
biological traits
Fishery
Marine biodiversity
Environmental science
OCEANOGRAPHY
MARINE BIODIVERSITY
NEPHROPS-NORVEGICUS
business
SDG 12 - Responsible Consumption and Production
MARINE
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Pommer, C D, Olesen, M & Hansen, J L S 2016, ' Impact and distribution of bottom trawl fishing on mud-bottom Communities in the Kattegat ', Marine Ecology-Progress Series, vol. 548, pp. 47-60 . https://doi.org/10.3354/meps11649, Pommer, C D, Olesen, M & Hansen, J L S 2016, ' Impact and distribution of bottom trawl fishing on mud-bottom communities in the Kattegat ', Marine Ecology-Progress Series, vol. 548, pp. 47-60 . https://doi.org/10.3354/meps11649
- Accession number :
- edsair.doi.dedup.....ba41207cb715d2706b44327f138d7e7d