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Decomposition of old organic matter as a result of deeper active layers in a snow depth manipulation experimentGeographical Area and Life History Traits Influence Diet in an Arctic Marine PredatorArctic Vortex changes alter the sources and isotopic values of precipitation in northeastern USComplex carbon cycle responses to multi-level warming and supplemental summer rain in the high Arctic.Long-term experimental warming alters community composition of ascomycetes in Alaskan moist and dry arctic tundra.Long-term warming alters richness and composition of taxonomic and functional groups of arctic fungi.Coupled long-term summer warming and deeper snow alters species composition and stimulates gross primary productivity in tussock tundra.Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes.Changes in composition and abundance of functional groups of arctic fungi in response to long-term summer warming.Greater temperature sensitivity of plant phenology at colder sites: implications for convergence across northern latitudes.Ecological dynamics across the Arctic associated with recent climate change.Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska.Long-term increase in snow depth leads to compositional changes in arctic ectomycorrhizal fungal communities.Pacific North American circulation pattern links external forcing and North American hydroclimatic change over the past millenniumTree-ring isotopes reveal drought sensitivity in trees killed by spruce beetle outbreaks in south-central Alaska.Differential ecophysiological response of deciduous shrubs and a graminoid to long-term experimental snow reductions and additions in moist acidic tundra, Northern Alaska.Interactions among shrub cover and the soil microclimate may determine future Arctic carbon budgets.ENSO effects on δ18O, δ2H and d-excess values in precipitation across the U.S. using a high-density, long-term network (USNIP).Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability.Paired oxygen isotope records reveal modern North American atmospheric dynamics during the Holocene.Diet and metabolic state are the main factors determining concentrations of perfluoroalkyl substances in female polar bears from Svalbard.Choose your poison - Space-use strategy influences pollutant exposure in Barents Sea polar bears.Sea ice-associated decline in body condition leads to increased concentrations of lipophilic pollutants in polar bears (Ursus maritimus) from Svalbard, Norway.Emission Changes Dwarf the Influence of Feeding Habits on Temporal Trends of Per- and Polyfluoroalkyl Substances in Two Arctic Top Predators.Warming chambers stimulate early season growth of an arctic sedge: results of a minirhizotron field study.Climate and species affect fine root production with long-term fertilization in acidic tussock tundra near Toolik Lake, Alaska.Modeling the effect of photosynthetic vegetation properties on the NDVI--LAI relationship.Variation in leaf physiology of Salix arctica within and across ecosystems in the High Arctic: test of a dual isotope (Delta13C and Delta18O) conceptual model.Corrigendum to "Sea ice-associated decline in body condition leads to increased concentrations of lipophilic pollutants in polar bears (Ursus maritimus) from Svalbard, Norway" [Sci. Total Environ. 576 (2017) 409-419].Shrub expansion in tundra ecosystems: dynamics, impacts and research prioritiesThe temperature responses of soil respiration in deserts: a seven desert synthesisArctic plant ecophysiology and water source utilization in response to altered snow: isotopic (δO and δH) evidence for meltwater subsidies to deciduous shrubsDelayed herbivory by migratory geese increases summer-long CO uptake in coastal western AlaskaBiomass offsets little or none of permafrost carbon release from soils, streams, and wildfire: an expert assessmentPlot-scale evidence of tundra vegetation change and links to recent summer warmingDeepened winter snow increases stem growth and alters stemδ13C andδ15N in evergreen dwarf shrubCassiope tetragonain high-arctic Svalbard tundraSubstantial proportion of global streamflow less than three months oldThe pronounced seasonality of global groundwater rechargeSoil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern AlaskaQuantifying the isotopic ‘continental effect’
P50
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P50
name
Jeffrey M Welker
@en
type
label
Jeffrey M Welker
@en
prefLabel
Jeffrey M Welker
@en
P2038
Jeff_Welker