Search results for "Island"
showing 10 items of 761 documents
The Philippines, country of islands
2014
Genomic divergence landscape in recurrently hybridizing Chironomus sister taxa suggests stable steady state between mutual gene flow and isolation
2021
Abstract Divergence is mostly viewed as a progressive process often initiated by selection targeting individual loci, ultimately resulting in ever increasing genomic isolation due to linkage. However, recent studies show that this process may stall at intermediate stable equilibrium states without achieving complete genomic isolation. We tested the extent of genomic isolation between two recurrently hybridizing nonbiting midge sister taxa, Chironomus riparius and Chironomus piger, by analyzing the divergence landscape. Using a principal component‐based method, we estimated that only about 28.44% of the genomes were mutually isolated, whereas the rest was still exchanged. The divergence land…
Cruise tourism effetcts in the EU Islands' economies
2007
The theme of ‘the island condition and the characteristics of the EU territories surrounded by the sea has already been treated in a number of studies and in some recent research projects which have highlighted disparities, structural disadvantages and the presence of an economy which relies excessively on tourism. The aim of this paper is to show the incoming tourism or daily visitors’ flows generated by cruises in the EU islands, and to present the tourist expenditure matrix and the composition of the main expenses. The results seem to show that local economies generated by cruise daily visitors if combined with local productions, could have a good level of economic impact.
Assessing Climate Change Adaptation and Risk Management Programmes: Stakeholder Participation Process and Policy Implications for Transport, Energy a…
2022
Climate change is a critical sustainability challenge for islands and their main economic sectors. Rising sea levels, extreme temperatures, and drier conditions are the impacts with the most significant potential to amplify the economic damage on islands. However, their isolation and natural conditions bring about some leeway to respond to climate impacts on their terms. This paper aims to provide a local-level analysis and ranking of alternative adaptation pathways in an island context through the stakeholders’ lens. This study reviews the latest advancements in adaptation science and proposes a catalogue of adaptation and risk management options that feed a participatory assessment …
Wyspa w krajobrazie jako problem regionalizacji fizyczno-geograficznej na przykładzie Garbu Opola
2016
W regionalizacji fizyczno-geograficznej Polski obszar Garbu Opolskiego zaliczony został do makrore-gionu Nizina Śląska i mezoregionu Pradolina Wrocławska. Kwalifikacja ta nie jest zgodna z kryteria-mi wyróżniania mezoregionów i makroregionów. Garb Opolski pod względem budowy geologicznej może być identyfikowany jako część nieodległej Wyżyny Śląskiej, choć położony jest na znacząco mniejszej wysokości niż granica hipsometryczna między nizinami a wyżynami. Przykład Garbu Opolskiego pokazuje problem określenia przynależności wyspowych jednostek fizyczno-geograficznych na pograniczu wyżyn i nizin Polski. Na podstawie przeprowadzonych badań wska-zano na dwie możliwości rozwiązania podobnych prob…
Characterization of the seismic dynamical state through joint analysis of earthquakes and seismic noise: the example of Ischia Volcanic Island (Italy)
2020
This work is devoted to the study of both earthquakes and background seismic noise at Ischia Island (Italy) recorded pre and post the Md 4.0 earthquake occurred on 21 August 2017 (18:57 UTC). We compare and characterize noise and earthquakes in terms of Independent Component Analysis, energy and polarization properties. The earthquakes' waveforms and the background noise are decomposed into a few independent components with two main common signals peaked around 1–2 and 3–4 Hz, respectively. A slight increase of the energy of the background seismic noise is observed comparing samples recorded in 2016 and 2017, whereas no variations are detected in 2017 pre and post the main ear…
Tunable diode laser measurements of hydrothermal/volcanic CO2 and implications for the global CO2 budget
2014
Quantifying the CO2 flux sustained by low-temperature fumarolic fields in hydrothermal/volcanic environments has remained a challenge, to date. Here, we explored the potential of a commercial infrared tunable laser unit for quantifying such fumarolic volcanic/hydrothermal CO2 fluxes. Our field tests were conducted between April 2013 and March 2014 at Nea Kameni (Santorini, Greece), Hekla and Krýsuvík (Iceland) and Vulcano (Aeolian Islands, Italy). At these sites, the tunable laser was used to measure the path-integrated CO2 mixing ratios along cross sections of the fumaroles' atmospheric plumes. By using a tomographic post-processing routine, we then obtained, for each manifestation, the co…
«(Des)obediències de la reducció vocàlica en el català de Mallorca»
2013
En el català de Mallorca, el procés de reducció vocàlica de les vocals mitjanes de la sèrie anterior a e neutra en posició àtona no opera (o subaplica) en determinades circumstàncies: (a) en formes derivades productives amb una vocal àtona situada a la síl·laba esquerra o inicial del radical i alternant amb e tancada o e oberta en el radical de la forma primitiva; (b) en formes verbals amb una vocal àtona situada a la síl·laba esquerra o inicial del radical i alternant amb e tancada en una altra forma verbal del mateix paradigma flexiu; (c) en manlleus i paraules apreses amb una vocal àtona e situada, també, a la síl·laba esquerra o inicial del radical i generalment precedida d’una consonan…
Blueprint for a minimal photoautotrophic cell: conserved and variable genes in Synechococcus elongatus PCC 7942.
2011
This is an Open Access article distributed under the terms of the Creative Commons Attribution License.-- et al.
Island selection on mammalian life-histories: genetic differentiation in offspring size
2008
BACKGROUND: Since Darwin's pioneering work, evolutionary changes in isolated island populations of vertebrates have continued to provide the strongest evidence for the theory of natural selection. Besides macro-evolutionary changes, micro-evolutionary changes and the relative importance of natural selection vs. genetic drift are under intense investigation. Our study focuses on the genetic differentiation in morphological and life-history traits in insular populations of a small mammal the bank vole Myodes glareolus. RESULTS: Our results do not support the earlier findings for larger adult size or lower reproductive effort in insular populations of small mammals. However, the individuals li…