Reserve Srebarna

Location:Bulgaria
IUCN Category:IV
Area:2,294 acres (928 hectares)
Species:All  Endangered  Invasive
Map:View Google Map
Climate:View Climate Data
Land Use:View Land Use Data

Ecoregions

Balkan mixed forests

Soils

Link to Map
Protected Area Boundary
 A
  
Share75 %10 %5 %5 %5 %
Soil TypeHaplic ChernozemsCalcic ChernozemsCalcaric RegosolsHaplic ChernozemsEutric Regosols
Topsoil TextureFineMediumMediumFineMedium
Reference Depth100 cm100 cm100 cm100 cm100 cm
DrainageModerately wellModerately wellModerately wellModerately wellModerately well
Available Water Capacity150 m150 m150 m150 m150 m
Root ObstacleNone to 80 cmNone to 80 cmNone to 80 cmNone to 80 cmNone to 80 cm
Impermeable LayerNone to 150 cmNone to 150 cmNone to 150 cmNone to 150 cmNone to 150 cm
Soil Water RegimeNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month
Topsoil Properties
Gravel4 %4 %14 %4 %25 %
Sand12 %28 %44 %12 %47 %
Silt46 %47 %35 %46 %34 %
Clay42 %25 %21 %42 %19 %
USDA TextureSilty clayLoamLoamSilty clayLoam
Reference Bulk Density1.24 g/cm³1.35 g/cm³1.41 g/cm³1.24 g/cm³1.43 g/cm³
Bulk Density1.18 g/cm³1.21 g/cm³1.37 g/cm³1.18 g/cm³1.21 g/cm³
Organic Carbon2.62 %1.65 %0.75 %2.62 %0.98 %
PH7.17.887.16.4
Clay Cation Exchange Capacity69 cmol kg⁻¹64 cmol kg⁻¹45 cmol kg⁻¹69 cmol kg⁻¹40 cmol kg⁻¹
Soil Cation Exchange Capacity41 cmol kg⁻¹23 cmol kg⁻¹17 cmol kg⁻¹41 cmol kg⁻¹12 cmol kg⁻¹
Base Saturation100 %100 %100 %100 %78 %
Total Exchangeable Bases42 cmol kg⁻¹38 cmol kg⁻¹26.8 cmol kg⁻¹42 cmol kg⁻¹14 cmol kg⁻¹
Calcium Carbonate6 %4.6 %15 %6 %0 %
Calcium Sulphate0 %0 %0 %0 %0 %
Exchangeable Sodium1 %1 %2 %1 %1 %
Electrical Conductivity0.2 dS m-10.4 dS m-10.2 dS m-10.2 dS m-10.1 dS m-1
Subsoil Properties
Gravel6 %17 %18 %6 %28 %
Sand12 %28 %40 %12 %51 %
Silt48 %47 %35 %48 %31 %
Clay40 %25 %25 %40 %18 %
USDA TextureSilty clayLoamLoamSilty clayLoam
Reference Bulk Density1.25 g/cm³1.35 g/cm³1.37 g/cm³1.25 g/cm³1.44 g/cm³
Bulk Density1.32 g/cm³1.3 g/cm³1.5 g/cm³1.32 g/cm³1.45 g/cm³
Organic Carbon1.17 %0.78 %0.47 %1.17 %0.4 %
PH7.48.28.17.46.9
Clay Cation Exchange Capacity63 cmol kg⁻¹81 cmol kg⁻¹52 cmol kg⁻¹63 cmol kg⁻¹56 cmol kg⁻¹
Soil Cation Exchange Capacity34 cmol kg⁻¹24 cmol kg⁻¹15 cmol kg⁻¹34 cmol kg⁻¹11 cmol kg⁻¹
Base Saturation100 %100 %100 %100 %89 %
Total Exchangeable Bases40 cmol kg⁻¹29.1 cmol kg⁻¹36.5 cmol kg⁻¹40 cmol kg⁻¹10.3 cmol kg⁻¹
Calcium Carbonate6 %13.6 %15 %6 %0 %
Calcium Sulphate0 %0 %0 %0 %0 %
Exchangeable Sodium1 %2 %2 %1 %2 %
Electrical Conductivity0.5 dS m-10.4 dS m-10.3 dS m-10.5 dS m-10.1 dS m-1
Soil data provided by FAO/IIASA/ISRIC/ISSCAS/JRC, 2012. Harmonized World Soil Database (version 1.2). FAO, Rome, Italy and IIASA, Laxenburg, Austria.