More Like this

1. Multiple Element Limitation in Northeast Hardwood Ecosystems (MELNHE): Salt Exchangeable Cation Extractions from Hubbard Brook and Bartlett sites

   https://doi.org/10.6073/pasta/02e2764efb408a8b66b7f486eac14dc0  

   Walsh, Griffin E (January 2022, Environmental Data Initiative)

   {"Abstract":["Soil element concentrations (Na, Mg, K, Ca, Al, Mn, Fe, Si, Sr, and\n Ba) were measured in salt exchangeable extracts of soil samples taken\n in July 2017 in the MELNHE study, specifically in Bartlett stands\n C1-C9 and Hubbard Brook stands HBM and HBO.\n\n \n Additional detail on the MELNHE project, including a datatable of site\n descriptions and a pdf file with the project description and diagram\n of plot configuration can be found in this data package:\n https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344.\n\n \n Additional analysis data on these samples can be found in the dataset\n "Soil properties in the MELNHE study at Hubbard Brook\n Experimental Forest, Bartlett Experimental Forest and Jeffers Brook,\n central NH USA, 2009 - present"\n (https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=165).\n\n \n This work is a contribution of the Hubbard Brook Ecosystem Study.\n Hubbard Brook is part of the LTER network, which is supported by the\n US National Science Foundation. The Hubbard Brook Experimental Forest\n is operated and maintained by the US Department of Agriculture, Forest\n Service, Northern Research Station."]} 

   more » « less
2. Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Foliage Scans and Photographs

   https://doi.org/10.6073/pasta/7d93f50f9f2e848805b4aac9ed24689c  

   Zukswert, Jenna M (January 2024, Environmental Data Initiative)

   In the MELNHE project, we are conducting nutrient manipulations in three study sites in the White Mountain National Forest in New Hampshire: Bartlett Experimental Forest, Hubbard Brook Experimental Forest, and Jeffers Brook. We monitored foliar chemistry in 11 of our stands pre-treatment (2008-2010) and post-treatment (2014-2016 and 2021-22). In 2021-22 , we also measured specific leaf area, leaf dry matter content, carbon isotope composition, and stomatal density. This dataset includes scans of the foliage sampled in 2021-22, used to measure leaf area, and photos of all foliage samples used for trait measurements and chemical analysis. For the corresponding trait and chemistry data, please see the following dataset: https://portal.edirepository.org/nis/mapbrowse?packageid=knb-lter-hbr.313.1 Additional detail on the MELNHE project, including a datatable of site descriptions and a pdf file with the project description and diagram of plot configuration can be found in this data package: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344 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. Some of these data have been published in: Jenna M Zukswert, Matthew A Vadeboncoeur, Ruth D Yanai, Responses of stomatal density and carbon isotope composition of sugar maple and yellow birch foliage to N, P and CaSiO3 fertilization, Tree Physiology, Volume 44, Issue 1, January 2024, tpad142, https://doi.org/10.1093/treephys/tpad142 

   more » « less
3. Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Leaf Area Index (LAI), 2004

   https://doi.org/10.6073/pasta/c5aa2fccc8cdd81fa11db6007e9ce959  

   Hamburg, Steven P; Yanai, Ruth D; Vadeboncoeur, Matthew A (January 2025, Environmental Data Initiative)

   Leaf area index (LAI) is commonly used to assess forest canopies, and is calculated as the area of all leaves per unit area of ground. In September 2004, LAI was measured in all Bartlett Experimental Forest stands (C1-C9) of the MELNHE study in New Hampshire, using an LAI-2000 Plant Canopy Analyzer. Variables reported are leaf area index (LAI), standard error of LAI (SEL), diffuse non-interceptance (DIFN), mean tip angle (MTA), standard error of mean tip angle (SEM), and sample size (SMP). Additional detail on the MELNHE project, including a data table of site descriptions and a pdf file with the project description and diagram of plot configuration can be found in this data package: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344. 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. 

   more » « less
4. Data and Code in support of Nitrogen and phosphorus co-limitation of forest growth in northern hardwood forests; Blumenthal et al. 2025

   https://doi.org/10.6073/pasta/83dfe28aeb72ab797319847a17b2bc85  

   Stevens, M H; Blumenthal, Noah M; Fisk, Melany C (August 2025, Environmental Data Initiative)

   The Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) project studies N and P acquisition and limitation of forest productivity through a series of nutrient manipulations in northern hardwood forests. This data set is published in support of a manuscript titled "Nitrogen and phosphorus co-limitation of forest growth in northern hardwood forests" and includes data and code used in the analysis. The primary diameter breast height dataset can be found in: Fisk, M.C., R.D. Yanai, and T.J. Fahey. 2025. Tree DBH response to nitrogen and phosphorus fertilization in the MELNHE study, Hubbard Brook Experimental Forest, Bartlett Experimental Forest, and Jeffers Brook ver 2. Environmental Data Initiative. https://doi.org/10.6073/pasta/fb8f8d5b903627bee9ad6aa4c32f2289. Additional detail on the MELNHE project, including a datatable of site descriptions and a pdf file with the project description and diagram of plot configuration can be found in this data package: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344. 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. 

   more » « less
5. Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Sugar Maple Sap Sweetness and Nutrients, and Foliar Gas Exchange and Nutrients, 2013

   https://doi.org/10.6073/pasta/41f92f5c263ba689dee002f30f8dbd91  

   Wild, Adam D; Yanai, Ruth; Sinacore, Katherine (March 2025, Environmental Data Initiative)

   Sugar maple (Acer saccharum Marsh.) sap sweetness and elemental concentrations, foliar gas exchange, and foliar elemental concentrations were measured in 2013 in Bartlett Experimental Forest stands C6, C8, and C9 and Jeffers Brook stands JBM and JBO. In February and March 2013, sugar maples were sampled for sap sweetness and elemental concentrations of potassium (K), aluminum (Al), calcium (Ca), magnesium (Mg), manganese (Mn), phosphorus (P), and strontium (Sr). In July 2013, leaves from four sugar maple trees per plot, representing the two highest and lowest sap sugar concentrations, were sampled for foliar gas exchange and foliar elemental analyses of Ca, K, Mn, P, nitrogen (N), and silicon (Si). Additional detail on the MELNHE project, including a datatable of site descriptions and a pdf file with the project description and diagram of plot configuration can be found in this data package: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344 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. 

   more » « less