ZA090
Rietvlei Wetland: Table Bay Nature Reserve


IBA Criteria

Year of most recent IBA criteria assessment: 1998

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Cape Shoveler Spatula smithii LC non-breeding - 337-506 individuals A4i
Great Crested Grebe Podiceps cristatus LC non-breeding - 54 individuals A4i
African Oystercatcher Haematopus moquini LC non-breeding - present A1
Pied Avocet Recurvirostra avosetta LC non-breeding - 263-669 individuals A4i
Hartlaub's Gull Larus hartlaubii LC breeding - 150-375 breeding pairs A4i
Hartlaub's Gull Larus hartlaubii LC non-breeding - 543-1,102 individuals A4i
Kelp Gull Larus dominicanus LC non-breeding - 665 individuals A4i

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)
2013 high not assessed high
Was the whole site covered? Yes State assessed by unset
Accuracy of information medium

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Agricultural expansion and intensification annual & perennial non-timber crops - small-holder farming happening now small area/few individuals (<10%) slow but significant deterioration low
Biological resource use fishing & harvesting aquatic resources - unintentional effects: subsistence/small scale happening now small area/few individuals (<10%) no or imperceptible deterioration low
Biological resource use gathering terrestrial plants - unintentional effects (species being assessed is not the target) happening now small area/few individuals (<10%) no or imperceptible deterioration low
Biological resource use hunting & collecting terrestrial animals - unintentional effects (species is not the target) happening now small area/few individuals (<10%) no or imperceptible deterioration low
Climate change and severe weather drought likely in long term (beyond 4 years) whole area/population (>90%) moderate to rapid deterioration high
Climate change and severe weather habitat shifting and alteration happening now majority/most of area/population (50-90%) slow but significant deterioration high
Climate change and severe weather storms and floods likely in short term (within 4 years) whole area/population (>90%) no or imperceptible deterioration low
Climate change and severe weather temperature extremes likely in long term (beyond 4 years) whole area/population (>90%) moderate to rapid deterioration high
Energy production and mining mining and quarrying happening now small area/few individuals (<10%) no or imperceptible deterioration low
Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance work and other activities happening now some of area/population (10-49%) slow but significant deterioration medium
Invasive and other problematic species and genes introduced genetic material happening now small area/few individuals (<10%) slow but significant deterioration low
Invasive and other problematic species and genes invasive non-native/alien species/diseases - named species happening now some of area/population (10-49%) moderate to rapid deterioration high
Invasive and other problematic species and genes problematic native species/diseases - named species happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Natural system modifications fire & fire suppression - increase in fire frequency/intensity happening now small area/few individuals (<10%) no or imperceptible deterioration low
Natural system modifications other ecosystem modifications happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Pollution agricultural & forestry effluents - nutrient loads happening now majority/most of area/population (50-90%) slow but significant deterioration high
Pollution agricultural & forestry effluents - soil erosion, sedimentation happening now small area/few individuals (<10%) slow but significant deterioration low
Pollution air-borne pollutants - smog happening now whole area/population (>90%) slow but significant deterioration high
Pollution domestic & urban waste water - run-off happening now majority/most of area/population (50-90%) slow but significant deterioration high
Pollution excess energy - light pollution happening now whole area/population (>90%) slow but significant deterioration high
Pollution excess energy - noise pollution happening now whole area/population (>90%) slow but significant deterioration high
Pollution garbage & solid waste happening now some of area/population (10-49%) moderate to rapid deterioration high
Pollution industrial & military effluents - type unknown/unrecorded happening now some of area/population (10-49%) moderate to rapid deterioration high
Residential and commercial development commercial and industrial development happening now some of area/population (10-49%) slow but significant deterioration medium
Residential and commercial development housing and urban areas happening now some of area/population (10-49%) slow but significant deterioration medium
Residential and commercial development tourism and recreation areas happening now some of area/population (10-49%) slow but significant deterioration medium
Transportation and service corridors flight paths happening now some of area/population (10-49%) slow but significant deterioration medium
Transportation and service corridors roads and railroads happening now some of area/population (10-49%) slow but significant deterioration medium
Transportation and service corridors utility & service lines happening now some of area/population (10-49%) slow but significant deterioration medium

Condition of habitat (state)
Habitat Habitat Detail Reference Area (ha) Actual Area (ha) % of habitat remaining % of carrying capacity (overall) Result
Shrubland Shrubland - Cape (fynbos) 0 0 poor (40-69%) poor (40-69%) very unfavourable
Wetlands (inland) 0 0 moderate (70-90%) moderate (70-90%) unfavourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Whole area of site (>90%) covered by appropriate conservation designation A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species The conservation measures needed for the site are being comprehensively and effectively implemented high
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Rietvlei Nature Area Nature Reserve 549 protected area overlaps with site 527
Cape West Coast Biosphere Reserve UNESCO-MAB Biosphere Reserve 386,161 protected area overlaps with site 0

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Rivers & streams, Freshwater lakes and pools, Permanent herbaceous swamps and bogs, Ephemeral pools and wetlands -
Shrubland Shrubland - Cape (fynbos) -
Marine Coastal/Supratidal -
Marine Neritic -
Marine Intertidal -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
tourism/recreation -
nature conservation and research -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Rietvlei Wetland: Table Bay Nature Reserve. Downloaded from http://www.birdlife.org on 04/12/2022.