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Contrary to the predictions stemming from the nitrogen saturation hypothesis (Stoddard, 1994), some forested long-term research sites in Eastern North America exhibit peak streamwater nitrate exports during the growing season. Some initial hypotheses about climatic controls (Mullholland and Hill, 1997) have recently been questioned (Goodale et al., 2009). This is a proposal to fund a… Read more »

Climate change alters ecosystem and community properties and although inter-annual variation occurs year-round (Dominguez et al. 2012), most research on the response of ecosystems to climate change occurs during the primary growing season (e.g. Knapp et al. 2002) or uses annual averages that homogenize across seasons (e.g. Knapp & Smith 2001, Hsu et al. 2012)…. Read more »

Objectives We are requesting funds to assemble a working group of scientists (primarily LTER and ILTER) with interest and experience in designing and conducting climate change experiments. Our goal is to continue to design a network-level experiment, proposed previously as part of the LTER Decadal Planning process, to manipulate rainfall (i.e., impose drought) in terrestrial… Read more »

Goals: Coastal ecosystems are highly valued as key economic and cultural assets for society. They provide a wealth of ecosystem functions including storm protection, nutrient cycling, carbon sequestration, water filtration, detrital processing, fisheries, food web support, biodiversity and wildlife habitat. Rapidly growing populations and expanding development are intensifying pressures on these valuable ecosystems. Sea-level rise… Read more »