All three individuals from the creosotebush
community selected complex microhabitats, but they differed regarding avoided categories (Table 2).
Birds of creosotebush
community in the Cuatrocienegas basin, Coahuila, Mexico.
Historical records indicate that the Jornada Basin was dominated by warm-season C4 perennial grasses (e.g., Bouteloua eriopoda, Sporobolus flexuosus) at the time of European settlement, but much of the area has become dominated by shrubs, especially creosotebush
(Larrea tridentata) and mesquite (Prosopis glandulosa).
Blake (1984) examined seasonal changes of bird communities of a creosotebush
habitat in southern Nevada and found that foliage insectivores were more abundant, although fluctuations in abundance were likely for a variety of different factors, including resources, climate, etc.
Five sites were selected at random in both typical creosotebush
shrubland and mesquite shrubland habitats within 10 km of the grassland sites.
Mean percentage cover by forbs was correlated positively ([r.sub.s] = 1.0; P < 0.001; n = 4) with cumulative precipitation in July-August in alkali sacaton, creosotebush
, and sand sagebrush habitats.
Vegetation measurements were made at 10 sites dominated by creosotebush
(Larrea tridentata), tarbush (Florensia cernua) and bush muhly (Muhlenbergia porteri) within mixed desert scrub habitat.
Arthropods were sampled on each creosotebush
in September (late wet season) and November (early dry season) 1990, and early March (mid-dry season), May (late dry season) and August (mid-wet season) 1991 to represent seasonal changes in arthropod abundances and community structure.
(Larrea tridentata), and A.
Water and nitrogen effects on growth and allocation patterns of creosotebush
in the northern Chihuahuan Desert.
[Larrea tridentata (D.C.) Cov] is a xerophytic, evergreen, perennial shrub widely distributed and abundant in the hot deserts of North America (Shreve, 1942; Hunziker et al., 1977).
Associated vegetation included creosotebush
(Larrea sp.), mesquite, mariola (Parthenium sp.), catclaw, and various grasses.