Wyatt, Kevin H.

45 items:

Regulation of algal structure and function by nutrients and grazing in a boreal wetland 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... Categories: Publication; Types: Citation; Tags: P2-Changes in Plant and Animal Species Due to Climate Change
Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Categories: Data, Publication; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Monitoring 1-Changes in Plant and Animal Distribution: Ecosystems
Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Categories: Publication; Types: Citation; Tags: M1-Ecosystems
The importance of nutrient co-limitation in regulating algal community composition, productivity and algal-derived DOC in an oligotrophic marsh in interior Alaska Categories: Publication; Types: Citation; Tags: Modeling, Monitoring 1-Changes in Plant and Animal Distribution: Ecosystems, Monitoring 3-Improve Permafrost Mapping, and Monitoring
The role of light availability and herbivory on algal responses to nutrient enrichment in a riparian wetland, Alaska 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... Categories: Publication; Types: Citation; Tags: Monitoring 5-Physical Science

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