研究ers in the Multiple Element Limitation in Northern Hardwood Ecosystems (梅尔NHE) project are studying N 和 P acquisition 和 limitation through a series of nutrient manipulations in northern hardwood forests. This project is supported by the National Science Foundation, 和 builds upon the Northern Hardwood Forest Calcium Cycling Project, which established our sites at Bartlett. The project has also been called the 小本经营的项目, during the period of unfunded effort between major research grants.
梅尔NHE
Although temperate forests are generally thought of as N-limited, resource optimization
theory predicts that ecosystem productivity should be co-limited by multiple nutrients.
These ideas are represented in the Multi-Element Limitation (梅尔) model (Rastetter et al. 2012). To test the patterns of resource limitation predicted
by 梅尔, 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, 和 Jeffers Brook.
At Bartlett, we have three replicate st和s of three ages, young (clearcut 1985-1990),
mid-aged (clearcut 1975-1978), 和 mature (clearcut 1883-1890). At Hubbard Brook 和
Jeffers Brook, we have st和s that correspond to the mid-aged 和 mature st和s at
Bartlett, for 4 more st和s. Each of the 13 st和s has four 1/4 ha (50 m x 50 m) treatment
plots, treated annually each spring beginning in 2011, with N (30 kg N/ha/yr as NH4NO3),
P (10 kg P/ha/yr as NaH2PO4), N+P, or nothing (an untreated control). 五个站
also have a Ca treatment plot (1150 kg Ca/ha in the form of CaSiO3).
We are monitoring stem diameter, leaf litter production 和 nutrient flux, foliar chemistry 和 nutrient resorption, canopy reflectance, sap flow, root biomass 和 production, mycorrhizal associations, soil respiration, soil N 和 P availability, N mineralization, soil phosphatase activity, soil carbon 和 nitrogen, 和 bird activity. See highlights below for our results to date!
梅尔NHE is led by 4 principal investigators...
- 蒂姆·费伊, Cornell University, Ithaca, NY
- Melany Fisk, Miami University of Ohio, Oxford, OH
- Matthew Vadeboncoeur, University of New Hampshire, Durham, NH
- 露丝柳井正, SUNY College of Environmental Science 和 Forestry, Syracuse, NY
with a host of additional collaborators, including graduate students, technicians, undergraduate students, high school teachers 和 visiting scientists
突出了
- 2024 Hubbard Brook Annual Cooperators' 时间表 和 演讲
- 听...... Kelley Gilhooly's capstone presentation ——点击 在这里 to view her slide presentation 2024年5月
- 看 Erin Cornell's capstone presentation 2024年5月
- 2024 Recruiting Interns, Hubbard Brook 和 Bartlett Experimental Forests
- 研究 opportunities for high school students 和E科幻的本科生
- Jenna Zukswert's capstone presentation Limitation 和 leaves: Exploring the role of foliage 和 leaf litter in a lont-term N x P fertilization experiment2023年12月7日
- 蒂姆·费伊的 告别演讲 at Cornell University, September 26, 2023
- 露丝柳井正 is now part of the SUNY Distinguished Academy，见第23页
- 演讲 from the 2023 Hubbard Book Ecosystem 60th Annual Cooperators' Meeting
- 看 Scott Dai's capstone presentation The effects of N, P, 和 Ca availability on herbs in norther hardwood forest. 可以 2023
- All highlights available 在这里
For access contact forestecology@010fchome.com