Community and ecosystems processes in systems around the world are controlled by a variety of abitoic factors, including nutrient limitation. Although extensive research has been conducted examining how nutrient additions affect ecosystem structure and function, this remains an important objective for the field of ecology. In particular, the need for long-term experimental work examining how nutrient additions impact a variety of systems has become exceedingly clear. The goal of this session will be to bring together scientists studying the effects on nutrient additions on both community and ecosystem level processes within the Long-Term Ecological Research (LTER) network. The long-term nature of LTER studies within the network puts us in an ideal position to examine the long-term effects of chronic nutrient additions in a variety of systems. This session will be sponsored by the LTER Graduate Student Committee in order to facilitate communication on this important issue between scientists at several different stages of their careers. Speakers will be a combination of both lead PIs and graduate students from LTER sites in order to encourage discussion between these groups. In addition to direct nutrient effects, we aim to consider (1) the interactive effects of multiple nutrient additions, (2) how other global change drivers, such as changes in temperature, salinity, and CO2, as well as urbanization, potentially interact with the effects of nutrient additions, and (3) how systems recover from chronic nutrient additions. This session will include speakers from a wide variety of study systems, including oceans, streams, lakes, grasslands, forests, and urban systems. By examining the long-term effects of nutrients on wide range of ecosystem processes, in many habitat types, and by a diverse group of scientists, we will facilitate communication across boundaries.