World Species : Protected Area : Alto Golfo de California y Delta del Rio Colorado

Alto Golfo de California y Delta del Rio Colorado

Location:	Sonora, Mexico
IUCN Category:	VI
Area:	2,320,468 acres (939,060 hectares)
Species:	All Endangered Invasive
Climate:	View Climate Data
Land Use:	View Land Use Data
Köppen climate classification:	BWh (Climate: arid; Precipitation: desert; Temperature: hot arid)

Ecoregions

Sonoran desert

Soils

— Protected Area Boundary

	A		B					C

Share	60 %	40 %	20 %	12 %	8 %	30 %	30 %	25 %	15 %	10 %	15 %	9 %	6 %	11 %	9 %
Soil Type	Calcaric Regosols	Haplic Calcisols	Calcaric Regosols	Eutric Vertisols	Haplic Solonchaks	Eutric Regosols	Haplic Solonchaks	Lithic Leptosols	Eutric Regosols	Ferric Luvisols	Eutric Regosols	Lithic Leptosols	Haplic Phaeozems	Eutric Regosols	Lithic Leptosols
Topsoil Texture	Medium	Medium	Medium	Fine	Medium	Coarse	Medium	Medium	Coarse	Medium	Coarse	Medium	Fine	Coarse	Medium
Reference Depth	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	10 cm	100 cm	100 cm	100 cm	10 cm	100 cm	100 cm	10 cm
Drainage	Moderately well	Moderately well	Moderately well	Poor	Moderately well	Somewhat excessive	Moderately well	Imperfectly	Somewhat excessive	Moderately well	Somewhat excessive	Imperfectly	Moderately well	Somewhat excessive	Imperfectly
Available Water Capacity	150 m	150 m	150 m	125 m	150 m	100 m	150 m	15 mm	100 m	150 m	100 m	15 mm	150 m	100 m	15 mm
Misc. Property				Vertic (cracks of more than 1 cm wide)
Topsoil Properties
Gravel	9 %	10 %	9 %	4 %	4 %	19 %	4 %	28 %	19 %	19 %	19 %	28 %	4 %	19 %	28 %
Sand	51 %	47 %	51 %	20 %	42 %	73 %	42 %	70 %	73 %	67 %	73 %	70 %	25 %	73 %	70 %
Silt	41 %	25 %	41 %	22 %	27 %	23 %	27 %	20 %	23 %	18 %	23 %	20 %	35 %	23 %	20 %
Clay	8 %	28 %	8 %	58 %	31 %	4 %	31 %	10 %	4 %	15 %	4 %	10 %	40 %	4 %	10 %
USDA Texture	Loam	Sandy clay loam	Loam	Clay	Clay loam	Sandy loam	Clay loam	Sandy loam	Sandy loam	Sandy loam	Sandy loam	Sandy loam	Clay	Sandy loam	Sandy loam
Reference Bulk Density	1.56 g/cm³	1.37 g/cm³	1.56 g/cm³	1.21 g/cm³	1.34 g/cm³	1.7 g/cm³	1.34 g/cm³	1.56 g/cm³	1.7 g/cm³	1.5 g/cm³	1.7 g/cm³	1.56 g/cm³	1.27 g/cm³	1.7 g/cm³	1.56 g/cm³
Bulk Density	1.5 g/cm³	1.19 g/cm³	1.5 g/cm³	1.1 g/cm³	1.2 g/cm³	1.52 g/cm³	1.2 g/cm³	1.5 g/cm³	1.52 g/cm³	1.5 g/cm³	1.52 g/cm³	1.5 g/cm³	1.18 g/cm³	1.52 g/cm³	1.5 g/cm³
Organic Carbon	8.03 %	0.14 %	8.03 %	1.23 %	0.46 %	0.41 %	0.46 %	1.6 %	0.41 %	0.39 %	0.41 %	1.6 %	2.74 %	0.41 %	1.6 %
PH	8	7.8	8	8.1	8.1	6	8.1	6	6	6.1	6	6	6.4	6	6
Clay Cation Exchange Capacity		74 cmol kg⁻¹		42 cmol kg⁻¹	56 cmol kg⁻¹	140 cmol kg⁻¹	56 cmol kg⁻¹	52 cmol kg⁻¹	140 cmol kg⁻¹	68 cmol kg⁻¹	140 cmol kg⁻¹	52 cmol kg⁻¹	21 cmol kg⁻¹	140 cmol kg⁻¹	52 cmol kg⁻¹
Soil Cation Exchange Capacity	18 cmol kg⁻¹	21 cmol kg⁻¹	18 cmol kg⁻¹	29 cmol kg⁻¹	19 cmol kg⁻¹	14 cmol kg⁻¹	19 cmol kg⁻¹	11 cmol kg⁻¹	14 cmol kg⁻¹	12 cmol kg⁻¹	14 cmol kg⁻¹	11 cmol kg⁻¹	18 cmol kg⁻¹	14 cmol kg⁻¹	11 cmol kg⁻¹
Base Saturation	100 %	100 %	100 %	100 %	100 %	80 %	100 %	100 %	80 %	81 %	80 %	100 %	90 %	80 %	100 %
Total Exchangeable Bases	18 cmol kg⁻¹	21 cmol kg⁻¹	18 cmol kg⁻¹	29 cmol kg⁻¹	19 cmol kg⁻¹	11.2 cmol kg⁻¹	19 cmol kg⁻¹	11 cmol kg⁻¹	11.2 cmol kg⁻¹	9.7 cmol kg⁻¹	11.2 cmol kg⁻¹	11 cmol kg⁻¹	16.2 cmol kg⁻¹	11.2 cmol kg⁻¹	11 cmol kg⁻¹
Calcium Carbonate	17.9 %	11.7 %	17.9 %	2 %	4.2 %	0 %	4.2 %	0 %	0 %	0.1 %	0 %	0 %	0.2 %	0 %	0 %
Calcium Sulphate	0.3 %	0.1 %	0.3 %	0.1 %	1.6 %	0 %	1.6 %	0 %	0 %	0.1 %	0 %	0 %	0.1 %	0 %	0 %
Exchangeable Sodium	2 %	3 %	2 %	1 %	13 %	2 %	13 %	1 %	2 %	2 %	2 %	1 %	1 %	2 %	1 %
Electrical Conductivity	0.2 dS m-1	0.3 dS m-1	0.2 dS m-1	0.4 dS m-1	2.9 dS m-1	0 dS m-1	2.9 dS m-1	0 dS m-1	0 dS m-1	0 dS m-1	0 dS m-1	0 dS m-1	0.1 dS m-1	0 dS m-1	0 dS m-1
Subsoil Properties
Gravel	5 %	10 %	5 %	6 %	4 %	19 %	4 %		19 %	10 %	19 %		4 %	19 %
Sand	37 %	54 %	37 %	24 %	42 %	73 %	42 %		73 %	62 %	73 %		21 %	73 %
Silt	58 %	23 %	58 %	20 %	26 %	23 %	26 %		23 %	19 %	23 %		29 %	23 %
Clay	5 %	23 %	5 %	56 %	32 %	4 %	32 %		4 %	19 %	4 %		50 %	4 %
USDA Texture	Silt loam	Sandy clay loam	Silt loam	Clay	Clay loam	Sandy loam	Clay loam		Sandy loam	Sandy loam	Sandy loam		Clay	Sandy loam
Reference Bulk Density	1.6 g/cm³	1.41 g/cm³	1.6 g/cm³	1.22 g/cm³	1.34 g/cm³	1.7 g/cm³	1.34 g/cm³		1.7 g/cm³	1.45 g/cm³	1.7 g/cm³		1.23 g/cm³	1.7 g/cm³
Bulk Density	1.47 g/cm³	1.19 g/cm³	1.47 g/cm³	1.13 g/cm³	1.2 g/cm³	1.53 g/cm³	1.2 g/cm³		1.53 g/cm³	1.5 g/cm³	1.53 g/cm³		1.12 g/cm³	1.53 g/cm³
Organic Carbon	3.45 %	0.1 %	3.45 %	0.54 %	0.4 %	0.15 %	0.4 %		0.15 %	0.44 %	0.15 %		1.42 %	0.15 %
PH	8	7.9	8	7.9	8.2	6.4	8.2		6.4	7	6.4		6.2	6.4
Clay Cation Exchange Capacity		75 cmol kg⁻¹		48 cmol kg⁻¹	52 cmol kg⁻¹	140 cmol kg⁻¹	52 cmol kg⁻¹		140 cmol kg⁻¹	78 cmol kg⁻¹	140 cmol kg⁻¹		20 cmol kg⁻¹	140 cmol kg⁻¹
Soil Cation Exchange Capacity	6 cmol kg⁻¹	18 cmol kg⁻¹	6 cmol kg⁻¹	28 cmol kg⁻¹	18 cmol kg⁻¹	13 cmol kg⁻¹	18 cmol kg⁻¹		13 cmol kg⁻¹	16 cmol kg⁻¹	13 cmol kg⁻¹		15 cmol kg⁻¹	13 cmol kg⁻¹
Base Saturation	100 %	100 %	100 %	100 %	100 %	85 %	100 %		85 %	80 %	85 %		94 %	85 %
Total Exchangeable Bases	6 cmol kg⁻¹	18 cmol kg⁻¹	6 cmol kg⁻¹	28 cmol kg⁻¹	18 cmol kg⁻¹	11.1 cmol kg⁻¹	18 cmol kg⁻¹		11.1 cmol kg⁻¹	12.8 cmol kg⁻¹	11.1 cmol kg⁻¹		14.1 cmol kg⁻¹	11.1 cmol kg⁻¹
Calcium Carbonate	14.1 %	16.9 %	14.1 %	2 %	2.1 %	0.2 %	2.1 %		0.2 %	0.4 %	0.2 %		0.1 %	0.2 %
Calcium Sulphate	0.2 %	0.1 %	0.2 %	0.1 %	1.2 %	0.1 %	1.2 %		0.1 %	0.1 %	0.1 %		0 %	0.1 %
Exchangeable Sodium	4 %	3 %	4 %	2 %	16 %	3 %	16 %		3 %	1 %	3 %		1 %	3 %
Electrical Conductivity	1.2 dS m-1	0.3 dS m-1	1.2 dS m-1	0.3 dS m-1	6.7 dS m-1	0.1 dS m-1	6.7 dS m-1		0.1 dS m-1	0.1 dS m-1	0.1 dS m-1		0 dS m-1	0.1 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.

Köppen climate classification provided by Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006: World Map of Köppen-Geiger Climate Classification updated. Meteorol. Z., 15, 259-263