Results 1 to 10 of about 109,024 (352)

Summer warming explains widespread but not uniform greening in the Arctic tundra biome

Nature Communications, 2020
Arctic warming can influence tundra ecosystem function with consequences for climate feedbacks, wildlife and human communities. Yet ecological change across the Arctic tundra biome remains poorly quantified due to field measurement limitations and ...
Logan Berner, Richard Massey, Patrick Jantz   +2 more
exaly   +2 more sources

Experimental warming differentially affects vegetative and reproductive phenology of tundra plants

Nature Communications, 2021
Rapid climate warming is altering Arctic and alpine tundra ecosystem structure and function, including shifts in plant phenology. While the advancement of green up and flowering are well-documented, it remains unclear whether all phenophases ...
Courtney G Collins, Sarah C Elmendorf, Robert D Hollister   +2 more
exaly   +2 more sources

Linking tundra vegetation, snow, soil temperature, and permafrost

Biogeosciences, 2020
. Connections between vegetation and soil thermal dynamics are critical for estimating the vulnerability of permafrost to thaw with continued climate warming and vegetation changes.
I. Grünberg, E. Wilcox, S. Zwieback, P. Marsh, J. Boike   +4 more
semanticscholar   +2 more sources

Multi-decadal patterns of vegetation succession after tundra fire on the Yukon-Kuskokwim Delta, Alaska

Environmental Research Letters, 2020
Alaska’s Yukon-Kuskokwim Delta (YKD) is one of the warmest parts of the Arctic tundra biome and tundra fires are common in its upland areas. Here, we combine field measurements, Landsat observations, and quantitative cover maps for tundra plant ...
Gerald V Frost, Rachel A Loehman, Lisa B Saperstein, Matthew J Macander, Peter R Nelson, David P Paradis, Susan M Natali   +6 more
doaj   +2 more sources

Environmental drivers of increased ecosystem respiration in a warming tundra

Nature
Arctic and alpine tundra ecosystems are large reservoirs of organic carbon1,2. Climate warming may stimulate ecosystem respiration and release carbon into the atmosphere3,4.
, Sarah Schwieger, Matti Kummu
exaly   +2 more sources

Effects of Sea Animal Activities on Tundra Soil Denitrification and nirS‐ and nirK-Encoding Denitrifier Community in Maritime Antarctica

Frontiers in Microbiology, 2020
In maritime Antarctica, sea animals, such as penguins or seals, provide a large amount of external nitrogen input into tundra soils, which greatly impact nitrogen cycle in tundra ecosystems. Denitrification, which is closely related with the denitrifiers,
Hai-Tao Dai, Ren-Bin Zhu, Bo-Wen Sun, Chen-Shuai Che, Li-Jun Hou   +4 more
doaj   +2 more sources

Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling

Frontiers in Plant Science, 2019
Increases in the availability of nitrogen (N) may have consequences for plant growth and nutrient cycling in N-limited tundra plant communities. We investigated the impact alder (Alnus viridis spp. fruticosa), an N-fixing deciduous shrub, has on tundra N
Verity G. Salmon, Amy L. Breen, Jitendra Kumar, Mark J. Lara, Mark J. Lara, Peter E. Thornton, Stan D. Wullschleger, Colleen M. Iversen   +7 more
doaj   +2 more sources

Spring diet and energy intake of tundra swan (Cygnus columbianus) at the Yellow River National Wetland in Baotou, China [PDF]

PeerJ, 2022
The Yellow River National Wetland in Baotou, China is an important resting and energy replenishment place for many migratory birds, such as tundra swan (Cygnus columbianus). The energy supply of food available at stopover sites plays an important role in
Li Liu, Chao Du, Yan Sun, Wenjing Li, Jiyun Zhang, Litong Cao, Li Gao   +6 more
doaj   +2 more sources

Arctic tundra shrubification: a review of mechanisms and impacts on ecosystem carbon balance

Environmental Research Letters, 2021
Vegetation composition shifts, and in particular, shrub expansion across the Arctic tundra are some of the most important and widely observed responses of high-latitude ecosystems to rapid climate warming.
Z. Mekonnen, W. Riley, L. Berner, N. Bouskill, M. Torn, G. Iwahana, A. Breen, I. Myers-Smith, M. G. Criado, Yanlan Liu, E. Euskirchen, S. Goetz, M. Mack, R. Grant   +13 more
semanticscholar   +1 more source

Rainfall Alters Permafrost Soil Redox Conditions, but Meta-Omics Show Divergent Microbial Community Responses by Tundra Type in the Arctic

Soil Systems, 2021
Soil anoxia is common in the annually thawed surface (‘active’) layer of permafrost soils, particularly when soils are saturated, and supports anaerobic microbial metabolism and methane (CH4) production.
Karl J. Romanowicz, Byron C. Crump, George W. Kling   +2 more
doaj   +1 more source