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- Above-ground biomass (1)
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Articles 1 - 6 of 6
Full-Text Articles in Forest Sciences
How Do Long-Term Above-Ground Biomass Dynamics Vary Between Different Forest Stand Types At Harvard Forest?, Maya Y. Chandar-Kouba
How Do Long-Term Above-Ground Biomass Dynamics Vary Between Different Forest Stand Types At Harvard Forest?, Maya Y. Chandar-Kouba
Honors Projects
Monitoring forest carbon storage is necessary in accurately modelling the global carbon cycle. In the Northeast, terrestrial forests represent a major carbon sink with above-ground biomass (AGB) accounting for 40% of stored forest carbon. Therefore, understanding how AGB varies spatiotemporally is essential in predicting future carbon storage. Repeated measurements in permanent, long-term plots provide an opportunity to examine how carbon stored in AGB is changing over time. I used 29 years of data from the Harvard Forest Environmental Monitoring Systems (HF EMS) Site to determine how stand composition, intrinsic factors, and extrinsic environmental factors influenced rates of carbon storage in …
Salicylic Acid Response To Simulated Herbivory In Geographically Distinct T. Heterophylla And H. Discolor Populations, Amy E. Castle
Salicylic Acid Response To Simulated Herbivory In Geographically Distinct T. Heterophylla And H. Discolor Populations, Amy E. Castle
Honors Projects
It is commonly known that plants may produce salicylic acid as a chemical defense response to wounding, although the phenomenon has usually been observed with regard to insect herbivory. Stem and leaf tissue of two species, Tsuga heterophylla and Holodiscus discolor, which are often eaten by deer, were extracted in methanol and analyzed by HPLC to quantify salicylic acid concentration in experimentally wounded or control samples. No salicylic acid response was detectable in T. heterophylla, suggesting it is a less useful candidate species for future study. Some but not all H. discolorsamples had a measurable salicylic acid …
Surveying Eastern Hemlocks In The Northwestern Portion Of Port Sheldon Natural Area For Hemlock Woolly Adelgid, Murielle A. Garbarino
Surveying Eastern Hemlocks In The Northwestern Portion Of Port Sheldon Natural Area For Hemlock Woolly Adelgid, Murielle A. Garbarino
Honors Projects
Hemlock woolly adelgid (Adelges tsugae, HWA) is an insect native to Asia that feeds on the starches of hemlock trees (Tsuga spp.). HWA is invasive to the Eastern United States and can kill Eastern hemlock trees (Tsuga canadensis). Eastern hemlock is the only hemlock species native to Michigan. As of 2019, the invasion of HWA in Michigan is concentrated in the western portion of the lower peninsula. Monitoring is important to determine the extent of HWA within the state and to establish infested areas in need of treatment. This purpose of this project was to do a 100 percent survey …
Comparing Population Density Estimation Techniques For Columbia Black-Tailed Deer (Odocoileus Hemionus Columbianus): Fecal Standing Crop And Distance Sampling Methods, Jubilee D. Brenneman
Comparing Population Density Estimation Techniques For Columbia Black-Tailed Deer (Odocoileus Hemionus Columbianus): Fecal Standing Crop And Distance Sampling Methods, Jubilee D. Brenneman
Honors Projects
I estimated deer density and population size on Blakely Island, WA, using the fecal standing crop (FSC) method described by Martin et al. (2011). I compared the FSC method with a well established and broadly applicable estimation method, distance sampling. Additionally, architecture of a commonly browsed shrub, Ocean Spray (Holodiscus discolor), was measured as an indicator of browsing pressure. Fecal standing crop was estimated by counting pellet groups along 26, 100 x 2m line transects. Deer density was estimated using these data and the equation derived by Martin et al. (2011). Distance sampling consisted of recording perpendicular distance …
Coping With Forest Fragmentation: A Comparison Of Colobus Angolensis Palliatus Dietary Diversity And Behavioral Plasticity In The East Sagara Forest, Tanzania., Noah T. Dunham
Honors Projects
Habitat destruction and forest fragmentation are perhaps the largest threats to primate species around the world. While national parks, games reserves, and primate sanctuaries are instrumental in primate conservation, research suggests that some non-governmentally protected forest fragments may also serve as viable habitats for primates. Of course not all primates respond to fragmentation in the same way, but a species’ ability to survive in a fragment relates to 1) home range size 2) degree of frugivory 3) dietary flexibility and behavioral plasticity and 4) ability to utilize matrix habitats. Here I describe these variables in relation to black and white …
Species Vs. Height As Predictors Of Increased Growth Rate In New England Canopy Trees, Kiely Schultz
Species Vs. Height As Predictors Of Increased Growth Rate In New England Canopy Trees, Kiely Schultz
Honors Projects
As part of a larger study on the effect of an experimentally-created gap within a forest on adult canopy trees, focuses on the possible effect of tree height versus type of species on radial growth response to gap creation. Sample includes fifty trees within four transects next to a gap in the Yale-Myers Experimental Forest in Connecticut, with results showing that type of species affects radial growth response.