Bay of Torslanda (Sweden) - BirdLife IBA factsheet

SE044

Bay of Torslanda

Current view: Data table and detailed info

IBA Justification

The site was identified as important in 2007 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List¹	Season	Year(s)	Size	IBA criteria
Whooper Swan Cygnus cygnus	LC	passage	2000-2006	50-200 individuals	B1i, C2
Smew Mergellus albellus	LC	winter	2000-2006	25-125 individuals	C2, C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2007) may differ.

IBA Conservation

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2007. The most recent assessment (2007) is shown below.

IBA conservation assessment
Year of assessment	State	Pressure	Response
2007	unfavourable	very high	low
Whole site assessed?	State assessed by	Accuracy of information
yes	population	medium

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Whooper Swan Cygnus cygnus	200	125	individuals	63	unfavourable
Smew Mergellus albellus	200	100	individuals	50	unfavourable

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	-	poor (40-69%)	very unfavourable
Marine Neritic	-	moderate (70-90%)	near favourable
Marine Coastal/Supratidal	-	moderate (70-90%)	near favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Energy production and mining	happening now	some of area/population (10-49%)	very rapid to severe deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Pollution	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Some of site covered (10-49%)	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Some limited conservation initiatives are in place	low

IBA Protection

Year	Protected Area	Designation	% overlap with IBA
1996	Torsviken	Special Protection Area (Birds Directive)	54

Local Conservation Groups

The Local Conservation Group(s) listed below are working to conserve this IBA.

Name	Year formed
Föreningen Torslandavikens Naturreservat	0
Göteborgs ornitologiska förening	0

For more information on BirdLife's work with Local Conservation Groups, please click here.

Habitats

Habitat¹	Habitat detail	% of IBA
Marine Neritic		30
Artificial/Terrestrial	Other urban and industrial areas, Ruderal land, Arable land	21
Shrubland	Scrub	5
Grassland	Mesophile grasslands	4
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

Land use

Land use	% of IBA
urban/industrial/transport	50
nature conservation and research	45
agriculture	5

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Bay of Torslanda (Sweden). Downloaded from https://datazone.birdlife.org/site/factsheet/bay-of-torslanda-iba-sweden on 23/11/2024.