CA057
Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) This is an IBA in danger! 


IBA Criteria

Year of most recent IBA criteria assessment: 2008

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Trumpeter Swan Cygnus buccinator LC winter 1995 526 individuals A4i
Brent Goose Branta bernicla LC passage 1999 4,751 individuals A4i
American Wigeon Mareca americana LC winter 1995 30,500 individuals A4i
Red-necked Grebe Podiceps grisegena LC passage 1998 2,576 individuals A4i
Western Grebe Aechmophorus occidentalis LC passage 1998 3,000 individuals A4i
Dunlin Calidris alpina LC winter 1995 29,000 individuals A4i
Western Sandpiper Calidris mauri LC passage 1992 500,000 individuals A4i
Glaucous-winged Gull Larus glaucescens LC winter 1995 19,000 individuals A4i
A4iii Species group - waterbirds n/a winter - 500,000-999,999 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2016 very high not assessed not assessed
Was the whole site covered? Yes State assessed by unset
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Agricultural expansion and intensification annual & perennial non-timber crops - agro-industry farming happening now some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) slow but significant deterioration medium
Invasive and other problematic species and genes invasive non-native/alien species/diseases - unspecified species happening now some of area/population (10-49%) moderate to rapid deterioration high
Pollution industrial & military effluents - type unknown/unrecorded happening now majority/most of area/population (50-90%) slow but significant deterioration high
Residential and commercial development commercial and industrial development happening now some of area/population (10-49%) moderate to rapid deterioration high
Transportation and service corridors shipping lanes happening now majority/most of area/population (50-90%) very rapid to severe deterioration very high

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Some of site covered (10-49%) No management plan exists but the management planning process has begun The conservation measures needed for the site are being comprehensively and effectively implemented not assessed
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Peace Arch Park A - Park 9 protected area contained by site 8
George C. Reifel Migratory Bird Sanctuary 376 protected area overlaps with site 400
Fraser River Delta Ramsar Site, Wetland of International Importance 20,682 protected area overlaps with site 1,000
Boundary Bay Wildlife Management Area 12,011 protected area overlaps with site 11,000
Alaksen National Wildlife Area 349 protected area contained by site 360

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Forest Temperate coniferous forest, Temperate deciduous woods -
Wetlands (inland) Salt/brackish marshes, Estuarine waters, Intertidal mud, sand or salt flats, Freshwater marshes/swamps -
Sea Open sea -
Artificial - terrestrial Arable land, Urban and industrial areas -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -
fisheries/aquaculture -
hunting -
tourism/recreation -
urban/industrial/transport -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2018) Important Bird Areas factsheet: Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary). Downloaded from http://www.birdlife.org on 19/11/2018.