Wyniki wyszukiwania:

Homestead National Monument of America (HOME) is located in the southeast corner of Nebraska (Figure 1). The Monument was established in 1936 to commemorate the Homestead Act of 1862, a law intended to stimulate the agricultural economy through free land deeds. HOME includes the 160 acres once owned by Daniel Freeman, who is credited with filing the first homestead claim in the United States (Hutchinson, 1992). For the settlers of the Great Plains, the prairie initially provided food for livestock and housing by way of sod. A great deal of original prairie has since been converted for...

During surveys in 2006, the authors documented 35 invasive, exotic plant species on Wilson's Creek National Battlefield. Their findings are detailed in this report.

It is against a backdrop of vanishing or altered ecosystems, declining bird populations and the unique role that National Park Service lands can play in conserving threatened bird species that the authors propose monitoring avian communities on National Park Service lands within the HTLN. Long-term trends in the community composition and abundance of breeding bird populations provide one measure for assessing the ecological integrity and sustainability of ecosystems. Long-term patterns in community composition and species abundance in relation to changes in the structural diversity of...

Two broad objectives are addressed by this protocol: 1) Determine the annual status and trends of invertebrate species diversity, abundance and community metrics, and 2) Relate the invertebrate community to overall water quality through quantification of metrics related to species richness, abundance and diversity and region specific multi-metric indices as indicators of water quality and habitat condition