Results 81 to 90 of about 119,043 (304)

Marine trophic architecture and hidden ecological connections in the Strait of Magellan: keystone species and ecosystem resilience

Oikos, EarlyView.
Understanding the ecological implications of species coexistence is central to biodiversity studies and to identify environmental and anthropogenic drivers of ecosystem dynamics, where ecological network analysis offers valuable insights. This study examines the complexity, structure, and potential responses to disturbances of the Strait of Magellan's ...
Claudia D. Andrade, Taryn Sepúlveda, Cristóbal Rivera, Cristian Aldea, Tomás I. Marina   +4 more
wiley   +1 more source

Bacterial diversity assessment in Antarctic terrestrial and aquatic microbial mats : a comparison between bidirectional pyrosequencing and cultivation [PDF]

, 2014
The application of high-throughput sequencing of the 16S rRNA gene has increased the size of microbial diversity datasets by several orders of magnitude, providing improved access to the rare biosphere compared with cultivation-based approaches and more ...
D'hondt, Sofie, De Meyer, Tim, De Wever, Aaike, Obbels, Dagmar, Peeters, Karolien, Tytgat, Bjorn, Van Criekinge, Wim, Verleyen, Elie, Vyverman, Wim, Willems, Anne   +9 more
core   +4 more sources

Global analysis of annual survival among shorebirds reveals a negative effect of migration distance and a decline in recent decades

Oikos, EarlyView.
Annual survival is a key demographic parameter driving population trends in wildlife populations. However, despite numerous species‐specific or regional studies, global reviews of the factors affecting the survival of declining taxa remain scarce. Here, we investigated annual survival of fledged immature and adult shorebirds, a globally‐distributed and
Guillaume Dillenseger, Christopher H. J. Sparkes, Tamás Székely, Brett K. Sandercock, Robert P. Freckleton, Vojtěch Kubelka   +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

Blogging on the ice: Connecting audiences with climate-change sciences [PDF]

, 2013
Scientists working in Antarctica have recognized the need to counteract problems associated with mainstream media's treatment of the climate-change crisis.
Thorsen, Einar
core   +1 more source

Deep Proteomic Profiles of the Antarctic Diatom Fragilariopsis Cylindrus Under Varying Iron and Manganese Conditions

PROTEOMICS, EarlyView.
ABSTRACT Fragilariopsis cylindrus is a key diatom in the Southern Ocean, where low iron and manganese availability constrain primary production and biogeochemical activity. The molecular mechanisms used by polar diatoms, including F. cylindrus, to cope with trace metal limitations remain largely unexplored.
Loay J. Jabre, Elden Rowland, J. Scott P. McCain, Erin M. Bertrand   +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

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

Key Scientific Developments Since the IPCC Fourth Assessment Report [PDF]

, 2009
Provides an overview of peer-reviewed research published between July 2006 and June 2009 on fossil fuel emissions; ocean acidification; projected sea level rises; rates of ice and permafrost melting and thawing, and the lasting impacts of global ...

core