Results 141 to 150 of about 164,105 (362)

Climate change and underwater light: Large‐scale changes in ultraviolet radiation transparency associated with intensifying wet–dry cycles

open access: yesLimnology and Oceanography Letters, EarlyView.
Abstract Ultraviolet radiation (UV) is the most energetic waveband of incident solar radiation and has wide‐ranging effects in the aquatic environment. Our analysis of an 18‐year record of underwater irradiance and related limnological variables in sub‐alpine, ultra‐oligotrophic Lake Tahoe revealed orders of magnitude changes in UV transparency ...
Shohei Watanabe   +4 more
wiley   +1 more source

Vulnerable but not equal: Mountain lakes exhibit heterogeneous patterns of phytoplankton responses to climate change

open access: yesLimnology and Oceanography Letters, EarlyView.
Abstract While climate change affects the phytoplankton biodiversity at both local and global scales, predicting phytoplankton community responses to warming is impaired by their polyphyletic complexity. High mountain lakes are highly vulnerable systems, partly due to their limited biodiversity, and forecasting their ecological trajectories is a key ...
Flavia Dory   +13 more
wiley   +1 more source

Extending monitoring with sediment archive approaches: Comparison of biomonitoring, metabarcoding, and biomarkers to assess past phytoplankton dynamics

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract Sedimentary archives can provide valuable insights into the study of anthropogenic impacts on marine and limnic ecosystems over centennial and millennial timescales, potentially extending the temporal breadth of observation‐based biomonitoring.
Juliane Romahn   +7 more
wiley   +1 more source

Snowmelt Timing Regulates Community Composition, Phenology, and Physiological Performance of Alpine Plants

open access: yesFrontiers in Plant Science, 2018
The spatial patterning of alpine plant communities is strongly influenced by the variation in physical factors such as temperature and moisture, which are strongly affected by snow depth and snowmelt patterns.
D. Winkler   +4 more
semanticscholar   +1 more source

Warming winters promote biodiversity through reduced mortality of a habitat‐forming species in soft‐sediment intertidal systems

open access: yesOikos, EarlyView.
Habitat‐forming species enhance biodiversity by providing shelter, substrate and feeding grounds for many species. Climate‐change effects on these species may have wide ranging impacts on local species richness and abundance. Warmer winter temperatures in particular are an important driver of demographic parameters in temperate to polar environments ...
Paula de la Barra   +2 more
wiley   +1 more source

Perturbative description of high-$T_c$ superconductivity in the Hubbard model via unitary transformation and classical spins [PDF]

open access: yesarXiv
A unitary transformation is applied to the Hubbard model, which maps the Hubbard interaction to a single particle term. The resulting Hamiltonian consists of unconstrained fermions, which is then mapped to a Hamiltonian of spinless fermions coupled to pseudospins.
arxiv  

Effects of boreal ground layer shrubs and bryophytes on the diversity, biomass and composition of lichen communities across contrasting ecosystems

open access: yesOikos, EarlyView.
There has been much recent interest in understanding how abiotic factors such as light, nutrients, and soil moisture affect the composition and biomass of lichen communities. Meanwhile, whether and how ground layer vegetation such as bryophytes and shrubs also influence lichen communities have received much less attention, particularly regarding how ...
Nicolas Fanin   +5 more
wiley   +1 more source

Muon Tomography of Ice-filled Cleft Systems in Steep Bedrock Permafrost: A Proposal [PDF]

open access: yesarXiv, 2010
In this note, we propose a novel application of geoparticle physics, namely using a muon tomograph to study ice-filled cleft systems in steep bedrock permafrost. This research could significantly improve our understanding of high alpine permafrost in general and climate-permafrost induced rockfall in particular.
arxiv  

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