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'):Species | Current IUCN Red List Category | Season | Year(s) | Population estimate at site | IBA criteria met |
---|---|---|---|---|---|
Whooper Swan Cygnus cygnus | LC | passage | 2005 | 195-1,011 individuals | A4i |
Red-breasted Goose Branta ruficollis | VU | passage | 2005 | 732-1,662 individuals | A1, A4i |
Greylag Goose Anser anser | LC | passage | 2007 | 2,560-6,430 individuals | A4i |
Greater White-fronted Goose Anser albifrons | LC | passage | 2005 | 2,400-8,050 individuals | A4i |
Lesser White-fronted Goose Anser erythropus | VU | passage | 2005 | < 50 individuals | A1 |
Common Goldeneye Bucephala clangula | LC | passage | 2005 | 1,270-2,820 individuals | A4i |
A4iii Species group - waterbirds | n/a | passage | 2007 | 13,200-27,600 individuals | A4iii |
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2007).
IBA conservation assessment | |||
---|---|---|---|
Year of assessment (most recent) | State (condition) | Pressure (threat) | Response (action) |
2015 | very unfavourable | high | not assessed |
Was the whole site assessed? | State assessed by | Accuracy of information | |
yes | population | medium |
State (condition of the trigger species' populations) | ||||||
---|---|---|---|---|---|---|
Scientific name | Common name | Reference population | Actual population | Units | % of population remaining | Result |
Cygnus cygnus | Whooper Swan | 1010 | 3 | individuals | 1 | very unfavourable |
Bucephala clangula | Common Goldeneye | 2820 | 650 | individuals | 24 | very unfavourable |
Aythya fuligula | Tufted Duck | 1900 | 112 | individuals | 6 | very unfavourable |
Spatula querquedula | Garganey | 78 | 78 | individuals | 100 | favourable |
Mareca strepera | Gadwall | 2430 | 41 | individuals | 2 | very unfavourable |
Species group - waterbirds | A4iii | 27600 | 1135 | individuals | 5 | very unfavourable |
State (condition of the trigger species' habitats) | ||||||
---|---|---|---|---|---|---|
Habitat | Habitat detail | Reference area (ha) | Actual area (ha) | Habitat quantity (% remaining) | Habitat quality (carrying capacity) | Result |
Artificial/Terrestrial | Other urban & industrial areas | 0 | 0 | poor (40-69%) | poor (40-69%) | very unfavourable |
Artificial/Terrestrial | Ruderal land | 0 | 0 | poor (40-69%) | poor (40-69%) | very unfavourable |
Forest | Wooded steppe | 50 | 50 | - | poor (40-69%) | unfavourable |
Grassland | Humid | 200 | 200 | - | very poor (< 40%) | very unfavourable |
Grassland | Steppes & dry calcareous | 300 | 200 | - | poor (40-69%) | very unfavourable |
Wetlands (inland) | Standing fresh water | 400 | 300 | - | moderate (70-90%) | unfavourable |
Pressure (threats to the trigger species and/or their habitats) | |||||
---|---|---|---|---|---|
Threat level 1 | Threat level 2 | Timing | Scope | Severity | Result |
Agricultural expansion and intensification | annual & perennial non-timber crops - small-holder farming | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
Agricultural expansion and intensification | livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming | happening now | some of area/population (10-49%) | moderate to rapid deterioration | high |
Biological resource use | fishing & harvesting aquatic resources - unintentional effects: large scale | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
Biological resource use | hunting & collecting terrestrial animals - intentional use (species being assessed is the target) | happening now | some of area/population (10-49%) | moderate to rapid deterioration | high |
Climate change and severe weather | drought | 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 |
Pollution | agricultural & forestry effluents - type unknown/unrecorded | happening now | majority/most of area/population (50-90%) | slow but significant deterioration | high |
Pollution | domestic & urban waste water - type unknown/unrecorded | happening now | some of area/population (10-49%) | no or imperceptible deterioration | low |
Pollution | excess energy - noise pollution | happening now | some of area/population (10-49%) | no or imperceptible deterioration | low |
Pollution | garbage & solid waste | happening now | some of area/population (10-49%) | no or imperceptible deterioration | low |
Residential and commercial development | housing and urban areas | happening now | some of area/population (10-49%) | no or imperceptible deterioration | low |
Transportation and service corridors | roads and railroads | happening now | small area/few individuals (<10%) | no or imperceptible deterioration | low |
Response (conservation actions taken for the trigger species and/or their habitats) | |||
---|---|---|---|
Protected-area designation | Management planning | Other conservation action | Result |
Not assessed | Not assessed | Not assessed | not assessed |
Habitat (IUCN level 1) | Habitat detail | Extent (% of site) |
---|---|---|
Forest | Wooded steppe | - |
Grassland | Humid, Steppes & dry calcareous | - |
Wetlands (inland) | Standing fresh water | - |
Artificial/Terrestrial | Arable land, Other urban & industrial areas, Ruderal land | - |
Land-use | Extent (% of site) |
---|---|
agriculture | - |
rangeland/pastureland | - |
fisheries/aquaculture | - |
hunting | - |
urban/industrial/transport | - |
Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Sorbalyk-Maybalyk Lake System. Downloaded from
http://datazone.birdlife.org/site/factsheet/sorbalyk-maybalyk-lake-system-iba-kazakhstan on 04/10/2023.