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Filters: Contacts: Rober, Allison R. (X) > partyWithName: Wyatt, Kevin H. (X)

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We investigated how the relative availability of solar radiation in the presence or absence of grazing alters the ability of benthic algae to respond to nutrient enrichment in an Alaskan marsh. We used a factorial mesocosm experiment that included nutrient enrichment (enriched or control), grazing (grazed or ungrazed), and light (unshaded or shaded) to simulate shading by macrophytes early and late in the growing season, respectively. We found stronger effects of grazers and nutrients compared to light on benthic algal biomass and taxonomic composition. Algal biomass increased in nutrient-enriched treatments and was reduced by grazing. Shading did not have an effect on algal biomass or taxonomic composition, but...
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We evaluated the potential for grazers to regulate benthic algal biomass and taxonomic composition in an Alaskan marsh after enrichment with nutrients that are expected to increase in the region with ongoing climate change. We nested caged and uncaged substrates together inside mesocosm enclosures with natural abundances of snails or no snails and with or without nutrient enrichment (NO3 + PO4 + Si). Algal biomass was greater in all nutrient-enriched enclosures than in controls. Algal biomass was greater in enclosures where grazers were present but excluded by a cage than in enclosures where grazers were allowed to graze or where grazers were absent. In the presence of nutrients, grazed communities were dominated...
    map background search result map search result map The role of light availability and herbivory on algal responses to nutrient enrichment in a riparian wetland, Alaska Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Spatial and temporal variability of algal community dynamics and productivity in floodplain wetlands along the Tanana River, Alaska Effects of soil moisture and water depth on ERS SAR backscatter measurements from an Alaskan wetland complex Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Regulation of algal structure and function by nutrients and grazing in a boreal wetland The role of light availability and herbivory on algal responses to nutrient enrichment in a riparian wetland, Alaska Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Spatial and temporal variability of algal community dynamics and productivity in floodplain wetlands along the Tanana River, Alaska Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Effects of soil moisture and water depth on ERS SAR backscatter measurements from an Alaskan wetland complex Regulation of algal structure and function by nutrients and grazing in a boreal wetland