Results 101 to 110 of about 2,868,735 (385)

Invasive non‐native species likely to threaten biodiversity and ecosystems in the Antarctic Peninsula region

Global Change Biology, 2020
The Antarctic is considered to be a pristine environment relative to other regions of the Earth, but it is increasingly vulnerable to invasions by marine, freshwater and terrestrial non‐native species.
K. Hughes, O. Pescott, J. Peyton, T. Adriaens, E. J. Cottier-Cook, G. Key, W. Rabitsch, E. Tricarico, D. Barnes, Naomi Baxter, M. Belchier, D. Blake, P. Convey, W. Dawson, Danielle Frohlich, L. Gardiner, Pablo González‐Moreno, R. James, C. Malumphy, Stephanie M. Martin, A. Martinou, D. Minchin, A. Monaco, Niall Moore, S. Morley, Katherine A. Ross, J. Shanklin, K. Turvey, David Vaughan, A. Vaux, Victoria Werenkraut, I. Winfield, H. Roy   +32 more
semanticscholar   +1 more source

Digitising biological collections to advance National Species Inventories: A case study from the flora of Chile

PLANTS, PEOPLE, PLANET, EarlyView.
In response to Chile's public policy to establish a national biodiversity inventory and monitoring system, we launched the HerbarioDigital.cl portal. We have digitised over 120,000 specimens representing more than 3,900 species from two Chilean herbaria, integrating them through a curated local taxonomic index.
Ricardo A. Segovia, Juan M. Sáez, Francisco A. Squeo, Alicia E. Marticorena, Julián Caro, Pablo C. Guerrero   +5 more
wiley   +1 more source

Ancient diversification in extreme environments: exploring the historical biogeography of the Antarctic winged midge Parochlus steinenii (Diptera: Chironomidae)

Frontiers in Ecology and Evolution
The terrestrial fauna of Antarctica consists of a limited number of species, notably insects, small crustaceans and other micro-invertebrates. Over long periods of evolutionary isolation, these organisms have developed varying degrees of tolerance to ...
Claudia S. Maturana, Claudia S. Maturana, Tamara Contador Mejias, Tamara Contador Mejias, Tamara Contador Mejias, Felipe L. Simões, Felipe L. Simões, Moisés A. Valladares, Moisés A. Valladares, Paula M. Vidal, Melisa Gañán, Melisa Gañán, Melisa Gañán, Melisa Gañán, Claudio A. González-Wevar, Claudio A. González-Wevar, Elie Poulin, Elie Poulin, Chester J. Sands, Peter Convey, Peter Convey, Peter Convey, Peter Convey   +22 more
doaj   +1 more source

Activities and Issues of a Developed Information System for the Italian Polar Research

Data Science Journal, 2010
Activities performed to develop an information system for the diffusion of Italian polar research (SIRIA project) are here described. The system collects and shares information related to research projects carried out in both the Antarctic (since 1985 ...
A Damiani, C Rafanelli, E Benedetti, M Storini   +3 more
doaj   +1 more source

Windows of opportunity in subseasonal weather regime forecasting: A statistical–dynamical approach

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study explores how the atmospheric state at initialisation creates windows of opportunity for improving week 3 forecasts of weather regime activity. Greenland blocking activity increases following Madden–Julian Oscillation phases 7, 8, and 1 and weak stratospheric polar vortex states, revealing patterns exploitable by statistical models.
Fabian Mockert, Christian M. Grams, Sebastian Lerch, Julian Quinting   +3 more
wiley   +1 more source

Biogeographic survey of soil bacterial communities across Antarctica

Microbiome
Background Antarctica and its unique biodiversity are increasingly at risk from the effects of global climate change and other human influences. A significant recent element underpinning strategies for Antarctic conservation has been the development of a
Gilda Varliero, Pedro H. Lebre, Byron Adams, Steven L. Chown, Peter Convey, Paul G. Dennis, Dandan Fan, Belinda Ferrari, Beat Frey, Ian D. Hogg, David W. Hopkins, Weidong Kong, Thulani Makhalanyane, Gwynneth Matcher, Kevin K. Newsham, Mark I. Stevens, Katherine V. Weigh, Don A. Cowan   +17 more
doaj   +1 more source

Recommended reference figures for geophysics and geodesy [PDF]

Specific reference figures are recommended for consistent use in geophysics and geodesy. The selection of appropriate reference figure for geophysical studies suggests a relationship between the Antarctic negative gravity anomaly and the great shrinkage ...
Khan, M. A., Okeefe, J. A.
core   +1 more source

A pilot variational coupled reanalysis based on the CESAM climate model

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Variational data assimilation of in‐situ and satellite ocean data and reanalysis atmospheric data into an intermediate complexity Earth system model is possible by adjusting the surface fluxes and internal model parameters. This pilot application requires nearly complete information on the atmospheric state for synchronization.
Armin Köhl, Iuliia Polkova, Guokun Lyu, Frank Lunkeit, Abhirup Banerjee, Silke Schubert, Detlef Stammer   +6 more
wiley   +1 more source

Mid-Miocene cooling and the extinction of tundra in continental Antarctica [PDF]

, 2008
A major obstacle in understanding the evolution of Cenozoic climate has been the lack of well dated terrestrial evidence from high-latitude, glaciated regions.
Ashworth, A.C., Hedenas, L., Hemming, S.R., Johnson, J.V., Leng, Melanie, Lewis, A.R., Machlus, M.L., Marchant, D.R., Newton, A.E., Raine, I., Willenbring, J.K., Williams, M., Wolfe, A.P.   +12 more
core   +1 more source

Using a causal effect network approach to quantify the impact of ENSO teleconnections on summer monsoon precipitation over the Himalayas and key regional circulations

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We quantified the causal effect (CE) of linkages between four monthly climate indices ENSO, SMHP, RWC, and MHC for 1940–2022 with a time lag of one month. The results show CE values from (1) ENSO to SMHP of −0.33$$ -0.33 $$ to −0.44$$ -0.44 $$ (i.e., a one standard deviation (SD) increase in ENSO causes a decrease in SMHP of −0.33$$ -0.33 $$ to −0.44$$
Grzegorz Muszynski, Andrew Orr, Indrani Roy, Giorgia Di Capua, Hamish D. Pritchard, J. Scott Hosking   +5 more
wiley   +1 more source