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In summer 2015 and spring 2016, researchers collected soils from the CaSiO3-enriched watershed at Hubbard Brook (W1) and from a nearby site west of the reference watershed at Hubbard Brook (W6). These soils were sampled throughout the hardwood zone of each watershed, and the sampling scheme explicitly examined pit-and-mound microtopographic gradients. These soils were analyzed for acid-base properties, net and gross N cycling rates, microbial biomass, and C cycling rates. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the US Forest Service, Northern Research Station. 

{"Abstract":["Detailed surveys of stream nitrate concentrations in the\n calcium-enriched (W1), hydrologic reference (W3), and biogeochemical\n reference (W6) watersheds were performed in the summer of 2015 with\n the goal of identifying "hotspots" of NO3- inflows into\n streams.\n\n \n Additional details on methods and analysis can be found at:\n\n \n Marinos, R. E., Campbell, J. L., Driscoll, C. T., Likens, G. E.,\n McDowell, W. H., Rosi, E. J., Rustad, L. E., & Bernhardt, E. S.\n (2018). Give and Take: A Watershed Acid Rain Mitigation Experiment\n Increases Baseflow Nitrogen Retention but Increases Stormflow Nitrogen\n Export. Environmental Science & Technology, 52(22), 13155\u201313165.\n https://doi.org/10.1021/acs.est.8b03553\n\n \n These data were gathered as part of the Hubbard Brook Ecosystem Study\n (HBES). The HBES is a collaborative effort at the Hubbard Brook\n Experimental Forest, which is operated and maintained by the US Forest\n Service, Northern Research Station."]} 

In early September 2015, we sampled five debris dams in both the stream draining W1 and Bear Brook, immediately downstream of W6. This dataset contains laboratory analysis of potential denitrification enzyme activity assays from these sediment cores. Details of the analysis method are reported in the supporting information of Marinos et al. 2018. These data are being published only in the interest of full data transparency. These data have very important limitations, discussed in the supporting information of Marinos et al. 2018, and the authors advise anybody considering reusing this data to be appropriately cautious. Marinos, R. E., Campbell, J. L., Driscoll, C. T., Likens, G. E., McDowell, W. H., Rosi, E. J., Rustad, L. E., & Bernhardt, E. S. (2018). Give and Take: A Watershed Acid Rain Mitigation Experiment Increases Baseflow Nitrogen Retention but Increases Stormflow Nitrogen Export. Environmental Science & Technology, 52(22), 13155–13165. https://doi.org/10.1021/acs.est.8b03553 These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.