Intercontinental Comparison of Small-Lake Fish Assemblages: The Balance between Local and Regional Processes

1990 ◽  
Vol 136 (3) ◽  
pp. 345-375 ◽  
Author(s):  
William M. Tonn ◽  
John J. Magnuson ◽  
Martti Rask ◽  
Jorma Toivonen
Keyword(s):  
Fish Assemblages ◽  
Small Lake ◽  
Local And Regional Processes ◽  
Regional Processes ◽  
Lake Fish

scholarly journals Comparative landscape dynamics of two anuran species: climate-driven interaction of local and regional processes

2009 ◽  
Vol 79 (3) ◽  
pp. 503-521 ◽  
Author(s):  
Earl E. Werner ◽  
Rick A. Relyea ◽  
Kerry L. Yurewicz ◽  
David K. Skelly ◽  
Christopher J. Davis
Keyword(s):  
Landscape Dynamics ◽  
Anuran Species ◽  
Local And Regional Processes ◽  
Regional Processes

scholarly journals Catch-per-unit-effort and size spectra of lake fish assemblages reflect underlying patterns in ecological conditions and anthropogenic activities across regional and local scales

2016 ◽  
Vol 73 (4) ◽  
pp. 535-546 ◽  
Author(s):  
Cindy Chu ◽  
Nigel P. Lester ◽  
Henrique C. Giacomini ◽  
Brian J. Shuter ◽  
Donald A. Jackson
Keyword(s):  
Body Size ◽  
Fish Assemblages ◽  
Anthropogenic Activities ◽  
Ecological Indicators ◽  
Size Spectrum ◽  
Catch Per Unit Effort ◽  
Ecological Processes ◽  
Boosted Regression Tree ◽  
Unit Effort ◽  
Lake Fish

Across broad geographic scales, ecological indicators for fish assemblages should represent causal ecological processes, be sensitive enough to show patterns across the landscape, and reflect underlying biotic or abiotic conditions that influence those patterns. We assessed the responses of commonly applied ecological indicators for lake fish assemblages (mean body size, catch-per-unit-effort (CPUE), and normalized length size spectrum (NLSS) slope) to regional (climate, water chemistry, and watershed stress due to human activities) and local (lake morphometry, water quality, and angling pressure) ecological and anthropogenic variables. The indicators were estimated using fish assemblage catch data acquired via a standardized gillnetting protocol implemented within 693 lakes in Ontario, Canada. To our knowledge, our study is the first size-based or catch-based indicator evaluation to include detailed observations of angling pressure on hundreds of inland lakes. Boosted regression tree models showed that CPUE of large-bodied organisms and NLSS slope best described underlying patterns in the regional and local variables. Models developed with a mix of regional and local variables performed better than models developed with regional or local variables alone. The relative influences of the variables and responses varied among indicators, but in general, ecological variables had greater influence on the indicators than anthropogenic variables. These results emphasize the complex and multiscaled nature of factors and ecological processes affecting body size, habitat-community production, and trophic dynamics in lake fish assemblages.

Biogeographic Associations in Fish Assemblages: Local vs. Regional Processes

Ecology ◽  
1989 ◽  
Vol 70 (5) ◽  
pp. 1472-1484 ◽  
Author(s):  
Donald A. Jackson ◽  
Harold H. Harvey
Keyword(s):  
Fish Assemblages ◽  
Regional Processes

The London Development Agency and Local Regeneration Issues: an Overview of Urban Regeneration Management

2002 ◽  
Vol 17 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Emmanuel Mutale ◽  
Michael Edwards
Keyword(s):  
Training Institution ◽  
Local Authorities ◽  
Development Agency ◽  
Regeneration Dynamics ◽  
Democratic Principles ◽  
Local And Regional Processes ◽  
And Training ◽  
Opening Section ◽  
Regional Processes ◽  
Broad Overview

The London Development Agency (LDA) was established in July 2000 as part of the new Greater London Authority (GLA). It has a remit to work in partnership with local authorities, businesses, voluntary groups, regeneration partnerships and training institution s. This paper is a broad overview of selected issues related to regeneration management in London . The opening section provides a brief policy con text leading to the formation of the LDA an d its strategic agenda. Secondly, we argue for a local role in regeneration management. Third, we examine the creation of the LDA, its approach and offer a tentative assessment of the democratic principles leading to its formation and the content of its strategy. Fourth, we sketch local regeneration dynamics from three localities, before concluding with possible outcomes as the new institution al structure takes effect an d also offer some suggestions on the linking up an d democratization of local and regional processes.

Sign in / Sign up

Export Citation Format

Share Document