Inventory and Monitoring Program
The Northeast Temperate Network (NETN) was established by the US National Park Service (NPS) to monitor ecological conditions in 11 parks located in seven northeastern states as well as six additional states through which the Appalachian National Scenic Trail passes. The NETN operates with the mandate to preserve park natural resources "unimpaired for future generations." These resources include water, air, geological, faunal and floral, and the various ecological, biological, and physical processes that act on these resources. The broad-based, scientifically sound information obtained through long term natural resource monitoring will have multiple applications for management decision-making, research, education, and promoting public understanding of park resources.Knowing the condition of natural resources in national parks is fundamental to the Services ability to manage park resources. Historically, managers and scientists have sought a way to characterize and determine trends in the condition of parks and other protected areas to provide early warning of impending threats and to assess the efficacy of management practices and restoration efforts. The challenge of protecting and managing a parks natural resources relies on a partnership based ecosystem approach because most parks are open systems, where threats such as air and water pollution, and invasive species, originate outside established park boundaries beyond the control of park managers. Natural resource monitoring provides site-specific information needed to understand and identify change in complex, variable, and imperfectly understood natural systems and to determine whether observed changes are within natural levels of variability.

