Longitudinal connectivity loss in a riverine network: accounting for the likelihood of upstream and downstream movement across dams
| العنوان: | Longitudinal connectivity loss in a riverine network: accounting for the likelihood of upstream and downstream movement across dams |
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| المؤلفون: | Diego García de Jalón, Santiago Saura, Gonzalo Rincón, Joaquín Solana-Gutiérrez, Carlos Alonso |
| المصدر: | Aquatic Sciences, ISSN 1015-1621, 2017-07, Vol. 79, No. 3 Archivo Digital UPM instname |
| بيانات النشر: | Springer Science and Business Media LLC, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | 0106 biological sciences, Hidrología, Mathematical optimization, Ecology, Computer science, 010604 marine biology & hydrobiology, Functional connectivity, Graph theory, Aquatic Science, Software package, 010603 evolutionary biology, 01 natural sciences, Conservation, Medio Ambiente, Computer software, Graph (abstract data type), Ecology, Evolution, Behavior and Systematics, Water Science and Technology |
| الوصف: | Disruption of longitudinal connectivity is a major concern in most of the world¿s rivers. Approaches based on graph theory have proven to be a suitable tool for analysing functional connectivity. However, previous applications of graph-based connectivity methods to river systems have been oversimplified in that they have treated potential barriers as binary features and rivers as symmetric networks. We here apply a network analytical approach in which (a) upstream and downstream connectivity are considered so that fish passability values across dams are asymmetrical, and (b) it is possible to consider a continuous range of passability values for every dam. We build on previous and widely used connectivity metrics (Probability of Connectivity, PC), which here are generalised and adapted toward that end. We compare the results of our approach with those that would be obtained under the more simplified assumptions of symmetric movement and of barriers as binary features. We want to prove if there are substantial differences between considering or not the asymmetry in river networks. The application of symmetrical and asymmetrical PC highlights major differences between the upstream connectivity versus the downstream connectivity. We provide our methods in a free software package so that they can be used in any other application to riverscapes. We expect to provide a better graph-based approach for the prioritisation of the removal or permeabilization of artificial obstacles as well as for the preservation of target river segments for connectivity conservation and restoration. |
| وصف الملف: | application/pdf |
| تدمد: | 1420-9055 1015-1621 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::802cf462e090786e491411e366cfaab0 https://doi.org/10.1007/s00027-017-0518-3 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....802cf462e090786e491411e366cfaab0 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14209055 10151621 |
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