Table 1 (A) Mean ground cover (%) at urban and non-urban sites in and around Tucson, AZ per transect.
From: Spatial cover and carbon fluxes of urbanized Sonoran Desert biological soil crusts
Non-urban | Urban | |||||
|---|---|---|---|---|---|---|
Mean | SEM | Percent of total | Mean | SEM | Percent of total | |
(A): Mean ground cover: difference by site | ||||||
Light cyanobacterial crusts | 5.6 | 0.5 | 7.5% | 3.8 | 0.3 | 5.3 |
Dark cyanobacterial crusts | 2.4 | 0.5 | 2.7% | 3.8 | 0.4 | 4.9 |
Rock | 6.4 | 0.6 | 8.7% | 7.3 | 0.5 | 10.3 |
Litter | 25.1 | 0.8 | 35.0% | 24.4 | 0.9 | 34.6 |
Vegetation/canopy cover | 42.1 | 0.2 | 40.3% | 48.7 | 0.7 | 45.0 |
Total crust cover (combined) | – | – | 11.4% | – | – | 10.6 |
% crusts found in open* | – | – | 22.4% | – | – | 55.8 |
% crusts found under plants* | – | – | 77.7% | – | – | 44.3 |
(B): Soil properties: difference by site | ||||||
pH | 8.54 | 0.02 | – | 8.57 | 0.01 | – |
Soil organic matter (grams) | 0.59 | 0.12 | – | 0.43 | 0.02 | – |
