Article
Ecology
Paul Savary, Jean-Christophe Foltete, Herve Moal, Stephane Garnier
Summary: This article discusses the potential benefits of integrating landscape graphs and genetic graphs in landscape genetics. By comparing different features and partitions of these graphs, the influence of intra-patch features and inter-patch connectivity on genetic structure can be examined, as well as the sensitivity of genetic diversity and differentiation to landscape factors. Additionally, the integration of these graphs through gravity models can enhance their joint use for various theoretical and applied objectives.
Review
Ecology
Lea Uroy, Audrey Alignier, Cendrine Mony, Jean-Christophe Foltete, Aude Ernoult
Summary: This article provides an overview of existing methods for assessing the temporal dynamics of connectivity, highlighting two main approaches based on spatial dispersal and spatio-temporal dispersal. These methods offer indicators to advance understanding of biodiversity patterns and implement measures to conserve and restore connectivity.
Article
Biochemistry & Molecular Biology
Paul Savary, Jean-Christophe Foltete, Herve Moal, Gilles Vuidel, Stephane Garnier
Summary: This study explored the use of genetic graphs in landscape genetic analyses, comparing different pruning methods and genetic distances to weight graph links. Results showed that methods based on geographical distance thresholds were more effective in identifying dispersal networks, and counter-intuitively, sub-selection of pairwise distances through graph pruning could lead to improved inferences of landscape effects on dispersal. Additionally, genetic distances such as D-PS or Euclidean genetic distances were found to respond faster to landscape changes, making them preferable for landscape effect inference.
MOLECULAR ECOLOGY RESOURCES
(2021)
Article
Environmental Sciences
Fatemeh Jahanishakib, Abdolrassoul Salmanmahiny, Seyed Hamed Mirkarimi, Fatemeh Poodat
Summary: The study focused on analyzing the hydrological connectivity within the landscape ecological network of Gharesou watershed in Iran using Graph theory to mitigate negative impacts of land use developments. By assessing future land use arrangements, the study identified critical areas, ecosystem services hotspots, and incompatible land uses, and used Circuit Theory to identify future critical areas in runoff source networks. Optimization of land use arrangements through Simulating Annealing algorithm helped balance ecological suitability and ecological network relationships, ultimately minimizing hydrological and ecological costs.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Ecology
Paul Savary, Jean-Christophe Foltete, Herve Moal, Gilles Vuidel, Stephane Garnier
Summary: The study developed an R package to enhance and promote the use of landscape and genetic graphs in landscape genetics. The package includes functions for handling genetic data, computing genetic distances, and geodesic calculations, as well as command-line tools and various parameters for analysis. Users can analyze, compare, visualize the graphs and export them for further research.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Computer Science, Interdisciplinary Applications
Wojciech Pomianowski
Summary: The importance of optimization in graph-theoretic algorithms and landscape connectivity methods is explored in this article. It is pointed out that indeterminate solutions may introduce bias in the results, and two optimization targets are distinguished. The use of complete planar graphs is advocated over thresholding in landscape graph creation.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Biodiversity Conservation
Tina G. Mozelewski, Zachary J. Robbins, Robert M. Scheller
Summary: Maintaining and enhancing landscape connectivity is crucial for reducing biodiversity declines caused by habitat fragmentation. However, the effectiveness of conservation efforts in enhancing connectivity for multiple species on dynamic landscapes is uncertain. This study forecasted landscape connectivity from 2020 to 2100 under different conservation land-acquisition strategies and found that clustering new protected areas around existing conservation areas yielded the greatest improvements in connectivity for specialist species.
CONSERVATION BIOLOGY
(2022)
Article
Plant Sciences
Lin Jin, Youngkeun Song
Summary: This study aims to analyze the changes in urban forest landscape connectivity and identify the most important forest patches for connectivity. A case study in Seoul, South Korea showed that forest landscape connectivity significantly increased from 2001 to 2018. The top ten forest patches with the highest importance for connectivity remained stable in all four years, and these patches were generally large in size. Based on these findings, the study also examined the impact of afforestation of small patches on overall connectivity and identified the 50 most important patches for afforestation as a guide for effective ecological afforestation planning.
URBAN FORESTRY & URBAN GREENING
(2023)
Article
Environmental Sciences
V. Marsili, S. Alvisi, F. Maietta, C. Capponi, S. Meniconi, B. Brunone, M. Franchini
Summary: This study investigates the application of graph theory metrics for assessing the transient response of water distribution networks to maneuvers on devices or users' activity. The analysis shows that some connectivity metrics can effectively reflect the dynamic pressure behavior of the network and provide useful indications for design and management operations considering unsteady flow features.
WATER RESOURCES RESEARCH
(2023)
Article
Ecology
F. Mestre, B. Silva
Summary: The lconnect R package is a user-friendly tool for assessing landscape connectivity and prioritizing habitat patches, which helps understand and address the challenges in biodiversity conservation.
ECOLOGICAL MODELLING
(2023)
Article
Clinical Neurology
J. Lanzone, M. Boscarino, T. Tufo, G. Di Lorenzo, L. Ricci, G. Colicchio, V. Di Lazzaro, M. Tombini, G. Assenza
Summary: This study used qEEG analysis to investigate the impact of VNS cycles on brain network activity in patients with epilepsy. The study found no differences in spectral activity, but consistent changes in network organization, most notably in the slow EEG bands.
CLINICAL NEUROPHYSIOLOGY
(2022)
Article
Plant Sciences
Tanguy Louis-lucas, Celine Clauzel, Flavie Mayrand, Philippe Clergeau, Nathalie Machon
Summary: This study aims to explore the contribution of green roofs to urban functional connectivity. Through modeling and calculating multiple indicators, it was found that green roofs slightly improve connectivity at a global scale, primarily through connections rather than area addition. Green roofs have a dispersion flux function at a local scale, but those over 20 meters high are often disconnected from ecological networks. The study also highlights the importance of building configuration.
URBAN FORESTRY & URBAN GREENING
(2022)
Article
Environmental Studies
Felipe de la Barra, Audrey Alignier, Sonia Reyes-Paecke, Andrea Duane, Marcelo D. Miranda
Summary: This research provides an overview of graph metrics for landscape characterization, analyzing their ecological significance to explain biodiversity patterns and ecological processes. Through literature review and case study, different landscape-scale and local-scale metrics were analyzed to identify differences between landscapes and discuss their potential applications in ecological contexts.
Article
Biodiversity Conservation
Bruno A. Aparicio, Jose M. C. Pereira, Francisco C. Santos, Chiara Bruni, Ana C. L. Sa
Summary: This study quantifies the influence of fuel spatial arrangement on fire spread connectivity and proposes network metrics for assessing wildfire hazard and fuel management plans. It shows that network metrics can identify important areas of wildfire connectivity and that fuelbreak construction can reduce overall connectivity and ground-based suppression opportunities. However, fuelbreaks may not be sufficient under extreme weather conditions to contain fire spread.
ECOLOGICAL INDICATORS
(2022)
Article
Ecology
Kevin S. McCann, Kevin Cazelles, Andrew S. MacDougall, Gregor F. Fussmann, Carling Bieg, Melania Cristescu, John M. Fryxell, Gabriel Gellner, Brian Lapointe, Andrew Gonzalez
Summary: Nearly 50 years ago, Rosenzweig and Tilman highlighted the destabilizing effects of nutrient addition on food webs and the resulting loss of species diversity and ecosystem function. Current research indicates that nutrient additions can lead to destabilization and loss of stability, particularly in human-impacted regions, due to competitive exclusion of edible plant species. Theoretical models suggest that spatial nutrient transport can amplify instabilities in highly modified landscapes, leading to rapid and expansive ecological disruptions over vast areas.