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Physical Sciences and Mathematics Commons™
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Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Compost Land Management And Soil Carbon Sequestration, Kylene A. Hohman
Compost Land Management And Soil Carbon Sequestration, Kylene A. Hohman
Senior Honors Projects, 2010-2019
Extensive fossil fuel burning has released carbon dioxide into the atmosphere. Under proper ecological conditions plants convert atmospheric carbon dioxide into stable soil organic matter, a natural and efficient means of mitigating climate change. In the symbiotic relationship between mycorrhizae and plants, mycorrhizae provide plants with essential nutrients in exchange for carbon sugars leaked from the plants. Mycorrhizae convert carbon sugars to an exudate called glomalin, a protein that assists in developing soil aggregates composed of sand, silt, and clay. These aggregates, called humus, store carbon for hundreds of years under healthy ecological conditions. Compost prompts soil microbes to aerobically …
Reintroduced Beavers Rapidly Influence Sediment Storage And Biogeochemistry In Headwater Streams Of The Methow River, Wa, Rita Mccreesh
Reintroduced Beavers Rapidly Influence Sediment Storage And Biogeochemistry In Headwater Streams Of The Methow River, Wa, Rita Mccreesh
Summer Research
To understand how rapidly beaver bioengineering impacts sediment organic material accumulation, we characterized the short-term, temporal dynamics of how reintroduced beavers have influenced sediment and organic material accumulation on 1st and 2nd order streams over the past decade. Sources of beaver related organics include coarse woody debris, fecal matter, and allochthonous material. We measured sediment physical properties, and analyzed samples for weight percent carbon and nitrogen. Our temporally constrained results provide insight into the rapidity at which beavers can influence biogeochemical systems in headwater streams.
Trade-Offs Between Three Forest Ecosystem Services Across The State Of New Hampshire, Usa: Timber, Carbon, And Albedo, David A. Lutz, Elizabeth A. Burakowski, Mackenzie B. Murphy, Mark E. Borsuk
Trade-Offs Between Three Forest Ecosystem Services Across The State Of New Hampshire, Usa: Timber, Carbon, And Albedo, David A. Lutz, Elizabeth A. Burakowski, Mackenzie B. Murphy, Mark E. Borsuk
Dartmouth Scholarship
Forests are more frequently being managed to store and sequester carbon for the purposes of climate change mitigation. Generally, this practice involves long-term conservation of intact mature forests and/or reductions in the frequency and intensity of timber harvests. However, incorporating the influence of forest surface albedo often suggests that long rotation lengths may not always be optimal in mitigating climate change in forests characterized by frequent snowfall. To address this, we investigated trade-offs between three ecosystem services: carbon storage, albedo-related radiative forcing, and timber provisioning. We calculated optimal rotation length at 498 diverse Forest Inventory and Analysis forest sites in …