Explaining island-wide geographical patterns of Caribbean fish diversity: A multi-scale seascape ecology approach

2017 ◽  
Vol 38 (3) ◽  
pp. e12434 ◽  
Author(s):  
Linn Sekund ◽  
Simon Pittman
Keyword(s):  
Fish Diversity ◽  
Geographical Patterns ◽  
Multi Scale ◽  
Seascape Ecology

scholarly journals INVESTIGATION ON BIODIVERSITY AND CONSERVATION OF FRESHWATER FISHES IN INDONESIA

2012 ◽  
Vol 7 (2) ◽  
pp. 171
Author(s):  
Sudarto Sudarto ◽  
Emmanuel Paradis
Keyword(s):  
Production Systems ◽  
Global Analysis ◽  
Freshwater Fishes ◽  
Freshwater Ecosystems ◽  
High Rate ◽  
Fish Diversity ◽  
Multi Scale ◽  
Adverse Impacts ◽  
Distribution Of Fish ◽  
Aquaculture Production

Indonesia is one of the richest regions in the world in terms of biodiversity. However, recent evidence has shown that tropical forests destruction has maintained at a high rate over the last few years in this country. At the same time, living resources in Indonesian freshwater ecosystems are important: this country ranks at number seven in terms of production of inland capture fisheries with 323,150 tonnes in 2008. Freshwater fishes represent 42% of the total estimated ichthyofauna, concentrated in 0.01% of the total water covered environment. This environment is closer to human activities, making it critically vulnerable to adverse impacts. Furthermore, there has been some recent debates on the general sustainability of fisheries and aquaculture production systems. This research was focused on initiating a multi-scale study of fish biodiversity in freshwater environments. Two specific actions have been started. A review based on the analyses of the existing scientific literature and of databases on fish taxonomy and distributions. In parallel to this work, a global analysis of the distribution of fish diversity in Indonesia was undertaken. This work aims at identifying the major features of this resource as well as its current and future threats.

scholarly journals Boreal river impoundments caused little change in fish diversity but clear community assemblage shifts: A multi-scale analysis

2017 ◽  
Author(s):  
Katrine Turgeon ◽  
Christian Turpin ◽  
Irene Gregory-Eaves
Keyword(s):  
Beta Diversity ◽  
Spatial Scales ◽  
Fish Diversity ◽  
Sampling Station ◽  
List Type ◽  
Species Assemblage ◽  
Scale Analysis ◽  
Multi Scale ◽  
Boreal River ◽  
Multi Scale Analysis

AbstractHydroelectricity is often presented as a clean and renewable energy source, but river flow regulation and fragmentation caused by dams are recognized to impact aquatic biodiversity in temperate and tropical ecosystems. However, the effects of boreal river impoundment are not clear as the few studies that exist have not been able to separate the hydrological changes brought about by dams from other factors (e.g. fish stocking, and species introduction).We adopted a multi-scale analysis to examine changes in nearshore fish communities over 20 years (spanning before and after impoundment) using a network of 24 sampling stations spread across from four reservoirs and two hydroelectricity complexes located in the boreal region (Northern Québec, Canada). Given the remote location, confounding factors were minimal.We found no strong temporal trends in alpha- and gamma-diversity in impacted stations (upstream and downstream of the dam) relative to reference sites across the three spatial scales. Using beta-diversity analyses, we also detected a high stability in fish composition over time and space at the complex and reservoir scales.At the scale of the sampling stations, we observed higher rates of species turnover (beta-diversity) coincident with the time of reservoir filling and shortly after. Likewise, we detected species assemblage shifts that correlated with time since impoundment only at the sampling station scale. This pattern was masked at the complex and reservoir scales.Synthesis and applications. Overall, the isolated effect of impoundment in these remote boreal ecosystems caused no loss of species and little change in fish diversity over 20 years, but resulted in substantial species assemblage shifts. Our work shows that examining community data at different scales is key to understand the anthropogenic impacts on fish biodiversity.

SPATIAL DISTRIBUTION OF FISH DIVERSITY IN GODAVARI RIVER AT AMBAD STRETCH

2019 ◽  
Vol 34 (1-2) ◽  
pp. 81-93
Author(s):  
D. D. BHUTEKAR ◽  
◽  
S. B. AHER ◽  
M. G. BABARE ◽  
◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Fish Diversity ◽  
Godavari River ◽  
Distribution Of Fish

Is there a regional culture in Russia? Opportunities of using a sociocultural approach in economics

2020 ◽  
pp. 108-126 ◽  
Author(s):  
V. A. Bryzgalin ◽  
Е. N. Nikishina
Keyword(s):  
Far East ◽  
Cross Cultural ◽  
Regional Culture ◽  
Russian Regions ◽  
Geographical Patterns ◽  
Cross Cultural Differences ◽  
The Far East ◽  
Sociocultural Approach ◽  
Critical Issues ◽  
Russian Universities

The paper investigates cross-cultural differences across Russian regions using the methodology of G. Hofstede. First, it discusses the most common approaches in measuring culture and the application of the Hofstede methodology in subnational studies. It identifies the critical issues in measuring culture at the regional level and suggests several strategies to address them. Secondly, the paper introduces subregional data on individualism and uncertainty avoidance using a survey of students across 27 Russian universities. The data allow to establish geographical patterns of individualism in Russia. It is demonstrated that collectivism is most prevalent in the Volga region, while individualism characteristic becomes stronger towards the Far East. The findings are robust to the inclusion of various controls and different specifications of the regression model. Finally, the paper provides a discussion about the potential of applying the sociocultural approach in economics.

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