Invaded sagebrush steppe -- Owyhee, Idaho : 無料・フリー素材/写真
Invaded sagebrush steppe -- Owyhee, Idaho / Ecological Society of America
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | A sea of non-native crested wheatgrass (Agropyron cristatum) fills the path of the Poison Creek fire (left), which burned in 1996 on the remote Owyhee High Plateau, in the southwest corner of Idaho. Nearly two decades later, an abrupt transition to healthy sagebrush marks the edge of the fire. The U.S. Bureau of Land Management (BLM), which oversees several hundred acres of public lands along the Owyhee, Bruneau, and Jarbidge Rivers, requires that new land use plans incorporate the U.S. National Vegetation Classification (USNVC) macrogroup types. The agency is pushing use of the USNVC for monitoring of sage grouse habitat, advocating for a common standard for the many stakeholders in sage grouse conservation.The USNVC launched in February 2016. Learn more about it.Classification of vegetation is essential for land use planning. The U.S. National Vegetation Classification was created to help federal and state agencies, academic scientists, and conservation groups speak the same language when classifying plant communities. The classification covers plant communities heavily influenced by human development as well as “natural” communities. It was designed to be adaptable through a peer review system, allowing the addition of new types of plant communities – arising through the influence of climate change and the rapid spread of species around the globe.Macrogroups fall at the mid-scale of the 8-level classification and include ecosystem categories familiar to ecologists, like Caribbean mangrove forest, tall grass prairie, or Great Basin sagebrush steppe. BLM is working to translate its Assessment, Inventory, and Monitoring (AIM) data to USNVC macrogroup types.Agropyron cristatum - Bromus tectorum - Sisymbrium altissimum Western North American Ruderal Semi-Desert Scrub & Grassland This Macrogroup occurs in semi-desert basins, piedmonts, and foothills where past disturbances from farming, livestock, buildings, and other human industry have created conditions that favor invasion by non-native species such as wheatgrass, cheatgrass, and tumble mustard.Photo credit: Robert Arkle, Supervisory Ecologist for the USGS Forest & Rangeland Ecosystem Science Center, Snake River Field Station, Idaho. |
| 撮影日 | 2011-06-27 20:01:15 |
| 撮影者 | Ecological Society of America |
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| カメラ | Canon PowerShot A590 IS , Canon |
| 露出 | 0.001 sec (1/1000) |
| 開放F値 | f/3.2 |
| 焦点距離 | 14506.66667 dpi |