scholarly journals Individual Trophic Specialisation in the Alpine Newt Increases with Increasing Resource Diversity

2019 ◽  
Vol 56 (1-6) ◽  
pp. 17 ◽  
Author(s):  
Sebastiano Salvidio ◽  
Andrea Costa ◽  
Federico Crovetto
Author(s):  
Victoria Paniagua ◽  
Jan P. Vogler

AbstractWhat explains the emergence and persistence of institutions aimed at preventing any ruling group from using the state apparatus to advance particularistic interests? To answer this recurring question, a burgeoning literature examines the establishment of power-sharing institutions in societies divided by ethnic or religious cleavages. Going beyond existing scholarly work focused on these specific settings, we argue that political power-sharing institutions can also be the result of common disputes within the economic elite. We propose that these institutions are likely to emerge and persist when competition between elite factions with dissimilar economic interests is balanced. To address the possibility of endogeneity between elite configurations and public institutions, we leverage natural resource diversity as an instrument for elite configurations. We show that, where geological resources are more diverse, competition between similarly powerful economic groups is more likely to emerge, leading ultimately to the establishment of power-sharing mechanisms that allow elite groups to protect their diverging economic interests.


Zoology ◽  
2013 ◽  
Vol 116 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Eva Líznarová ◽  
Lenka Sentenská ◽  
Luis Fernando García ◽  
Stano Pekár ◽  
Carmen Viera

2019 ◽  
Vol 30 (1) ◽  
pp. 93-106 ◽  
Author(s):  
Xia Zhao ◽  
Zhiying Wang ◽  
Lieven Eeckhout
Keyword(s):  

2008 ◽  
Vol 36 (4) ◽  
pp. 297-311 ◽  
Author(s):  
Konstantinos Sotiropoulos ◽  
Karolos Eleftherakos ◽  
Milos L. Kalezić ◽  
Anastasios Legakis ◽  
Rosa Maria Polymeni

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5913
Author(s):  
Wei Sun ◽  
Sam Harrison ◽  
Gareth P. Harrison

It is imperative to increase the connectable capacity (i.e., hosting capacity) of distributed generation in order to decarbonise electricity distribution networks. Hybrid generation that exploits complementarity in resource characteristics among different renewable types potentially provides value for minimising technical constraints and increasing the effective use of the network. Tidal, wave and wind energy are prominent offshore renewable energy sources. It is of importance to explore their potential complementarity for increasing network integration. In this work, the novel introduction of these distinct offshore renewable resources into hosting capacity evaluation enables the quantification of the benefits of various resource combinations. A scenario reduction technique is adapted to effectively consider variation of these renewables in an AC optimal power flow-based nonlinear optimisation model. Moreover, the beneficial impact of active network management (ANM) on enhancing the renewable complementarity is also investigated. The combination of complementary hybrid generation and ANM, specifically where the maxima of the generation profiles rarely co-occur with each other and with the demand minimum, is found to make the best use of the network components.


2008 ◽  
Vol 52 (No. 3) ◽  
pp. 57-61
Author(s):  
U. Czarnik ◽  
M. Galiński ◽  
T. Zabolewicz ◽  
Ch.S. Pareek

The present study addresses the characteristics of the frequency and segregation of alleles determining the SNP 775C>T polymorphism within the bovine <i>ITGB2</i> gene in the Black-and-White cattle population as well as in two endemic breeds of Polish Red and Polish White-Back cattle population qualified to the international programme of genetic resource diversity preservation in farm animals. The SNP 775C>T polymorphism revealed three amplified restriction fragments of 31 bp, 77 bp and 108 bp, forming three genotypes <i>CC</i> (31 bp, 77 bp), <i>CT</i> (31 bp, 77 bp, 108 bp) and <i>TT</i> (108 bp). A group of randomly selected Black-and-White cows was characterized by a negligible percentage of homozygous genotypes <i>TT</i> (5.1%) and by a prevailing percentage of heterozygous <i>CT</i> (60.1%) and homozygous <i>CC</i> (34.8%). In contrast, the between breeds analysis revealed that cows involved in the programme of genetic diversity preservation had a high prevalence of homozygotes <i>CC</i> (Polish Red &minus; 55.9%, Polish White-Back &minus; 60.0%), and a low percentage of homozygotes <i>TT</i> (Polish Red &minus; 8.8%, Polish White-Back &minus; 5.7%) in comparison with the Black-and-White cattle population. The degree of homozygosity in groups of Polish White-Back cows (65.7%) and Polish Red cows (64.7%) was remarkably higher than that of the Black-and-White cows (39.9%).


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