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Lahontan Salt Shrub Basin
Ecoregion
in
Great Basin
,
NV
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The Lahontan Salt Shrub Basin is an expansive dry plain that was once beneath Pleistocene Lake Lahontan. The Lahontan Basin, compared to the Bonneville Basin to the east in Ecoregion 13b, is lower in elevation and warmer in winter. Although there is a direct connection to the south through low elevation valleys to the Mojave Basin and Range (14), winters are cold enough in Ecoregion 13j to discourage the northward dispersal of many Mojavean species into the Lahontan Basin. In addition to shadscale, other salt-tolerant shrubs, such as Shockley desert thorn and Bailey greasewood, cover the lower basin slopes, and distinguish the Lahontan Salt Shrub Basin (13j) and Tonopah Basin (13u) from other Nevada salt shrub ecoregions. Sand dunes may occur where windblown sand accumulates against a barrier; dune complexes support a specialized plant community and diverse small mammal populations. The Carson and Truckee rivers, originating in the Sierra Nevada, provide water for irrigated farming. Riparian corridors along these rivers support the only trees found in the ecoregion.
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