ArcGIS REST Services Directory

Layer: Tamarisk Occurrence Points (1965) (ID: 21)

Parent Layer: Invasive Vegetation Occurrences

Name: Tamarisk Occurrence Points (1965)

Display Field: Project_Na

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: See metadata (FGDC section) for complete information about this layer - 1965 tamarisk point data for the Colorado Plateau ecoregion, USA Over the past 100 years, species of non-native tamarisk (Tamarix spp.) have invaded perhaps hundreds of thousands of acres in riparian zones and desert washes throughout the semi-arid, west and southwest United States (Robinson 1965, Cleverly et al. 1997). Large stands of tamarisk transpire vast amounts of precious water supplies, negatively alter soil chemistry, and out-compete native plant species (Zimmerman 1997, Di Tomaso 1998, Smith et al. 1998, Zavaleta 2000). Tamarisk is a prolific seeder, consummate resprouter, and is fire tolerant. Tamarisk has negative effects on many wildlife species, but it can act as marginal replacement habitat for some bird species, including the federally endangered native Southwestern Willow Flycatcher, though native riparian species such as cottonwoods, box elder, and willows would be more suitable habitat in the long term (DeLoach et al. 2003). Disruptions of the natural flow regimes and hybridization may be partly responsible for the spread and dominance of tamarisk in some areas, but additional research is needed for many aspects of tamarisk ecology (Schaal et al. 2003). One of the greatest limiting factors in understanding and controlling tamarisk is the lack of a detailed, high resolution map of tamarisk distribution and abundance relative to biologic, geographic and hydrologic conditions. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. The BLM should be cited as the data source in any products derived from these data.

Copyright Text: National Institute of Invasive Species (

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Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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