Grasslands occur on all continents and comprise about 50% of the area of the United States (Sims et al 1978). Grasslands, native and cultivated, provide the bulk of human nourishment. They do this directly via the growing of edible crops such as wheat and rice, and indirectly as a source of plant food for livestock.

Grasslands are threatened globally by human activities with conversion to cultivated croplands and overgrazing being the most common causes of habitat destruction and degradation. Not only have grasslands been disproportionately affected by human societies but they are also the least protected of any major habitat type. In recognition of these factors, grasslands have been identified as a top priority for conservation by TNC, and significant conservation action is required to meet its 2015 goal of effectively conserving 10% of grasslands worldwide. In order to contribute to this goal, the Conservancy pursues a variety of management actions on the lands and waters we steward. We also develop voluntary partnerships with public agencies and private landowners to help maintain and improve ecological conditions outside of our ownership boundaries.