World Species : Protected Area : Farasan Islands Special Nature Reserve

Farasan Islands Special Nature Reserve

Location:	Saudi Arabia
Area:	177,805 acres (71,955 hectares)
Species:	All Endangered Invasive

Ecoregions

Arabian Peninsula coastal fog desert

Soils

— Protected Area Boundary

	A

Share	30 %	20 %	20 %	10 %	10 %	10 %
Soil Type	Haplic Yermosols	Calcic Yermosols	Cambic Arenosols	Solonchaks	Calcaric Regosols	Calcaric Fluvisols
Topsoil Texture	Coarse	Medium	Coarse	Medium	Medium	Medium
Reference Depth	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm
Drainage	Well	Moderately well	Somewhat excessive	Moderately well	Moderately well	Poor
Available Water Capacity	100 m	150 m	100 m	150 m	150 m	150 m
Topsoil Properties
Gravel	4 %	20 %	4 %	6 %	17 %	10 %
Sand	81 %	39 %	89 %	35 %	43 %	35 %
Silt	12 %	37 %	6 %	43 %	35 %	47 %
Clay	7 %	24 %	5 %	22 %	22 %	18 %
USDA Texture	Loamy sand	Loam	Sand	Loam	Loam	Loam
Reference Bulk Density	1.64 g/cm³	1.38 g/cm³	1.7 g/cm³	1.38 g/cm³	1.4 g/cm³	1.41 g/cm³
Bulk Density	1.4 g/cm³	1.46 g/cm³	1.5 g/cm³	1.3 g/cm³	1.4 g/cm³	1.39 g/cm³
Organic Carbon	0.32 %	0.37 %	0.4 %	0.48 %	0.77 %	0.6 %
PH	8	8.1	6.4	8.1	8	8
Clay Cation Exchange Capacity	45 cmol kg⁻¹	45 cmol kg⁻¹	39 cmol kg⁻¹	44 cmol kg⁻¹	40 cmol kg⁻¹	65 cmol kg⁻¹
Soil Cation Exchange Capacity	6 cmol kg⁻¹	15 cmol kg⁻¹	3 cmol kg⁻¹	13 cmol kg⁻¹	17 cmol kg⁻¹	14 cmol kg⁻¹
Base Saturation	100 %	100 %	100 %	100 %	100 %	100 %
Total Exchangeable Bases	6.8 cmol kg⁻¹	24 cmol kg⁻¹	3 cmol kg⁻¹	17.6 cmol kg⁻¹	31.1 cmol kg⁻¹	19.8 cmol kg⁻¹
Calcium Carbonate	11 %	26 %	0 %	9 %	15 %	11.7 %
Calcium Sulphate	0.1 %	0.1 %	0 %	1.8 %	0 %	0.2 %
Exchangeable Sodium	5 %	8 %	3 %	39 %	2 %	2 %
Electrical Conductivity	2 dS m-1	2.4 dS m-1	0.1 dS m-1	20.8 dS m-1	0.3 dS m-1	0.7 dS m-1
Subsoil Properties
Gravel	5 %	41 %	4 %	5 %	18 %	11 %
Sand	78 %	30 %	89 %	38 %	38 %	37 %
Silt	10 %	42 %	5 %	39 %	36 %	45 %
Clay	12 %	28 %	6 %	23 %	26 %	18 %
USDA Texture	Sandy loam	Clay loam	Sand	Loam	Loam	Loam
Reference Bulk Density	1.56 g/cm³	1.34 g/cm³	1.68 g/cm³	1.38 g/cm³	1.36 g/cm³	1.42 g/cm³
Bulk Density	1.62 g/cm³	1.3 g/cm³	1.52 g/cm³	1.35 g/cm³	1.52 g/cm³	1.41 g/cm³
Organic Carbon	0.23 %	0.29 %	0.21 %	0.29 %	0.53 %	0.4 %
PH	8.1	8.1	6.3	8.2	8.1	8.1
Clay Cation Exchange Capacity	56 cmol kg⁻¹	35 cmol kg⁻¹	37 cmol kg⁻¹	56 cmol kg⁻¹	50 cmol kg⁻¹	84 cmol kg⁻¹
Soil Cation Exchange Capacity	6 cmol kg⁻¹	11 cmol kg⁻¹	3 cmol kg⁻¹	13 cmol kg⁻¹	15 cmol kg⁻¹	13 cmol kg⁻¹
Base Saturation	100 %	100 %	100 %	100 %	100 %	100 %
Total Exchangeable Bases	8.4 cmol kg⁻¹	21.8 cmol kg⁻¹	2.5 cmol kg⁻¹	13.9 cmol kg⁻¹	41.1 cmol kg⁻¹	20.7 cmol kg⁻¹
Calcium Carbonate	12 %	35 %	0 %	10.3 %	15 %	12.2 %
Calcium Sulphate	0.9 %	0.7 %	0 %	1 %	0 %	0.3 %
Exchangeable Sodium	3 %	8 %	3 %	39 %	1 %	3 %
Electrical Conductivity	3.5 dS m-1	2.6 dS m-1	0.1 dS m-1	14 dS m-1	0.3 dS m-1	0.5 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.