Analysis of Anthropogenic, Climatological, and Morphological Influences on Dissolved Organic Matter in Rocky Mountain Streams

摘要: In recent decades, the Rocky Mountains (RM) have undergone significant changes associated with anthropogenic activities and natural disturbances. These potential to alter primary productivity biomass carbon storage. particular, dissolved organic (DOC) in RM streams can affect heterotrophic processes, act as a source for nutrient cycle, absorb sunlight radiation, metal transport, promote production of carcinogenic byproducts during water treatment. Recent studies focused on relationship between bark beetle infestations stream matter but reached conflicting conclusions. Consequently, here we compile process multiple datasets representing features period 1983–2012 purpose assessing their relative influence DOC concentrations using spatial statistical modeling. Features climate, land cover, forest disturbances, topography, soil types, are included. We focus base-flow conditions because more representative longer-term (annual decadal) impacts less dependent episodic, short-term storm runoff/erosion events. To predict throughout network, use network model 56,550 km2 area address intrinsic connectivity hydrologic directionality network. Natural disturbances positively correlated increased concentrations; however, effect urbanization is far greater. Similarly, higher maximum temperatures, which be exacerbated by climate change, also elevated concentrations. Overall, present an increasing trend over time region.