These are examples of the projects, publications and data sets used to answer the NTL framework question. Other projects and data sets may be found using the keywords 'long-term change', 'climate forcing', 'drivers', or 'ecosystem services'.
Long term research at the NTL-LTER site, which was established in 1981, provided unexpected insights into the effect of climate shifts on lake-groundwater interactions. Five years after the site was established, the region experienced a severe 4-year drought. The availability of continuous, long-term data before, during, and after the drought allowed Anderson et al. (1993) to show that local flowpaths of groundwater to lakes were much more dynamic and transient than previously thought. Crystal Lake, an NTL-LTER seepage lake located high in the landscape received up to 10% of it's water inputs from groundwater during wet periods, but became totally isolated from groundwater inputs during the drought ....
NTL has transformed our understanding of aquatic ecosystems by pioneering new approaches and perspectives for studying these environments. These transformations include:
Eutrophication, the over-enrichment of freshwaters with nutrients, is caused by complex interactions of people and ecosystems that are hard to manage. A long-term perspective shows how management can adapt to changing social and ecological realities, learning from failures and building on successes.