Results 71 to 80 of about 109,024 (352)

Taxonomic diversity and abundance of enchytraeids (Annelida, Clitellata, Enchytraeida) in the Northern Palaearctic. 1. Asian part [PDF]

Biodiversity Data Journal
Enchytraeids, or potworms, are tiny oligochaetes that are distributed worldwide in many terrestrial, freshwater and marine ecosystems. Despite their key role in the functioning of ecosystems, the diversity and abundance of Enchytraeidae are rarely ...
Maxim Degtyarev, Ruslan Saifutdinov, Daniil Korobushkin, Alexander Bastrakov, Margarita Danilova, Ivan Davydov, Anastasia Gorbunova, Polina Guseva, Evgeniy Karlik, Roza Koshchanova, Ksenia Kuznetsova, Iurii Lebedev, Dmitriy Medvedev, Roman Obolenskiy, Anna Popova, Nina Pronina, Leonid Rybalov, Alexei Surov, Akmal Tadzhimov, Alexander Tarasov, Vladislav Vasiliev, Andrey Zaitsev, Elena Zvychaynaya, Konstantin Gongalsky   +23 more
doaj   +3 more sources

Use of Very High Spatial Resolution Commercial Satellite Imagery and Deep Learning to Automatically Map Ice-Wedge Polygons across Tundra Vegetation Types

Journal of Imaging, 2020
We developed a high-throughput mapping workflow, which centers on deep learning (DL) convolutional neural network (CNN) algorithms on high-performance distributed computing resources, to automatically characterize ice-wedge polygons (IWPs) from sub-meter
Md Abul Ehsan Bhuiyan, C. Witharana, A. Liljedahl   +2 more
semanticscholar   +1 more source

Impacts of large herbivores on mycorrhizal fungal communities across the Arctic

Ecography, EarlyView.
Mycorrhizal fungi play an integral role in nutrient and carbon cycling in soils, which may be especially important in the Arctic, one of the world's most soil carbon‐rich regions. Large mammalian herbivores can influence these fungi through their impacts on vegetation and soil conditions, however the strength and prevalence of these interactions in the
Cole G. Brachmann, Martin Ryberg, Brendan R. Furneaux, Anna Rosling, Tinghai Ou, Alf Ekblad, Svetlana Abdulmanova, Isabel C. Barrio, M. Syndonia Bret‐Harte, Hannu Fritze, Laura Gough, Robert D. Hollister, Ingibjörg S. Jónsdóttir, Oula Kalttopää, Elin Lindén, Päivi Mäkiranta, Johan Olofsson, Rauni Partanen, Kirsten A. Reid, Aleksandr Sokolov, Maija S. Sujala, Maja K. Sundqvist, Otso Suominen, Craig E. Tweedie, Amanda Young, Robert G. Björk   +25 more
wiley   +1 more source

20 years of change in tundra NDVI from coupled field and satellite observations

Environmental Research Letters, 2023
In 2022 we resampled normalized difference vegetation index (NDVI) along a 100 m transect in tundra near Utqiagvik, AK that had been previously measured through the 2000–2002 growing seasons, providing an opportunity to examine a 20 year NDVI change at a
K Fred Huemmrich, John Gamon, Petya Campbell, Marianna Mora, Sergio Vargas Z, Brenda Almanza, Craig Tweedie   +6 more
doaj   +1 more source

Co‐dominant species fail to compensate after 13‐year of dominant species removal in a Tibetan alpine grassland

Ecography, EarlyView.
To better understand the dynamics of community resilience, it is crucial to examine the role of dominant species in maintaining ecosystem functions. Dominant species, due to their high abundance, are considered to maintain productivity after species loss.
Wenyu Li, Qu‐zong Ci‐ren, Xianzhou Zhang, Shiping Wang, Yangjian Zhang, Xine Li, Yunlong He, Ge Hou, Rina Wendu, Wenchao Wu, Dorji Tsechoe, Lin Jiang, Josep Peñuelas, Yann Hautier, Juntao Zhu   +14 more
wiley   +1 more source

Influence of topography and moisture and nutrient availability on green alder function on the low arctic tundra, NT [PDF]

, 2017
The Arctic has warmed by at least 3°C over the past 50 years and this rapid warming is expected to continue. Climate warming is driving the proliferation of shrubs across the tundra biome with implications for energy balance, climate, hydrology, nutrient
Baltzer, Jennifer Lynn, Dr., Black, Katherine Louise, Ms.   +1 more
core   +1 more source

Neotropical Bird Migration During The Ice Ages: Orientation And Ecology [PDF]

, 1996
Reconstruction of breeding habitat of North American Neotropical migrants 18,000 years ago and 9,000 years ago indicated major shifts in both location and composition of plant communities relative to present conditions.
Webb, T., III, Williams, Timothy C., , \u2764   +1 more
core   +2 more sources

Soil nutrient content dominates short-term vegetation changes in alpine tundra of Changbai Mountains

Frontiers in Microbiology
Alpine tundra, covering 3% of the Earth’s land surface, harbors approximately 4% of higher plant species. Changes in this vegetation significantly impact biodiversity and ecosystem services.
Shanfeng Xing, Shanfeng Xing, Wen J. Wang, Lei Wang, Haibo Du, Zhengfang Wu, Shengwei Zong, Yu Cong, Shengjie Ba, Shengjie Ba   +9 more
doaj   +1 more source

Mycobiont contribution to tundra plant acquisition of permafrost-derived nitrogen.

New Phytologist, 2020
As Arctic soils warm, thawed permafrost releases nitrogen (N) that could stimulate plant productivity and thus offset soil carbon losses from tundra ecosystems.
R. Hewitt, M. DeVan, Irina V. Lagutina, H. Genet, A. McGuire, D. L. Taylor, M. Mack   +6 more
semanticscholar   +1 more source

Does Palsa Thaw in Northern Finland Contribute to Remobilisation of Metals Accumulated in Peat Into Surface Waters?

Land Degradation &Development, EarlyView.
ABSTRACT Permafrost is rapidly degrading in the sporadic zone, including palsa mires in Scandinavia. Peatlands in the area have likely accumulated heavy metals from atmospheric deposition of industrial contaminants in the wider region. As the palsa mire chemical composition is not well known, and in other permafrost regions the permafrost thaw may ...
Joanna Katarzyna Jóźwik, Krystyna Kozioł, Marcin Frankowski, Marta Jakubiak, Kamil Nowiński, Mariusz Jędrysek, Danuta Szumińska, Żaneta Polkowska   +7 more
wiley   +1 more source