HH1

  
                    View at site 1                                                Typical crust at site 1

Horse Heaven Hills, Jacobs Road, Benton Co., Washington, USA.  46º15.133' N latitude, 119º27.850' W longitude; elevation 607 feet.  More crusts and sandier than other WA sites.  Date of sampling:  15 July 1999.

Dominant vascular plants at the site: Artemisia tridentata, Bromus tectorum, C. viscidiflorus, C. nauseosus, Poa sp.

Mean lichen crust thickness: 16.4 mm
Mean algal crust thickness: 13.5 mm
Mean moss crust thickness: 14.2 mm

Cover summary:

Type Cover        % Cover
Shrubs                       1.2
Annuals                    4.0
Perennial grasses    0.0
Perennial forbs        0.0
Algal crust              58.4
Bryophytes             15.6
Lichens                    10.0
Bare Soil                    6.0
Rock                           0.0
Gravel                        0.4
Litter                          4.4
Cactus                        0.0
            

Chlorophyll a (ng/g):
N fixation rate (mmol/n2/m2/hr): 
Soil texture class: