Article
Ecology
Claire E. Woods, Kara G. Leimberger, Adam S. Hadley, Sarah J. K. Frey, Matthew G. Betts
Summary: This study investigated the effects of climate and forest loss, fragmentation on pollination and reproduction of a tropical herb, Heliconia tortuosa. The results showed that wet years, small patches, and heavily forested landscapes had negative consequences for Heliconia reproduction.
Article
Multidisciplinary Sciences
Jin-Yong Kim, Man-Seok Shin, Changwan Seo, Soo Hyung Eo, Seungbum Hong
Summary: The study found that the richness of passerine species is influenced by multiple factors in the Korean peninsula, which counter the global latitudinal gradient. The complex mechanism of the peninsular effect in the peninsula involves climate, habitat area, and migrant species inflow.
Article
Ecology
Helin Zhang, Daniel Bearup, Gyorgy Barabas, William F. Fagan, Ivan Nijs, Dongdong Chen, Jinbao Liao
Summary: Previous studies have assumed that habitat destruction has consistently negative effects on biodiversity, but there has been ongoing debate about whether habitat fragmentation also has negative effects. Using a simple model, researchers demonstrate that a competition-colonization trade-off can result in non-linear oscillatory responses to both habitat loss and fragmentation, which can explain the mixed responses of species richness to habitat fragmentation observed in nature.
Article
Multidisciplinary Sciences
Dan Cogalniceanu, Florina Stanescu, Diana Szekely, Theodor-Sebastian Topliceanu, Ruben Iosif, Paul Szekely
Summary: Urbanization has direct and indirect impacts on biodiversity, with this study finding that changes in body size and condition, rather than age parameters, better reflect the response of a common spadefoot toad population to habitat degradation caused by urban development.
Article
Ecology
Andre Luis Regolin, Luiz Gustavo Oliveira-Santos, Milton Cezar Ribeiro, Larissa Lynn Bailey
Summary: This study found that in a naturally fragmented landscape, habitat quality is more important than habitat amount in determining species habitat use. Habitat quality alone was the best predictor of habitat use for two of the less sensitive species (white lipped peccary and collared peccary).
Article
Ecology
Nicola Tommasi, Beatrice Colombo, Emiliano Pioltelli, Paolo Biella, Maurizio Casiraghi, Andrea Galimberti
Summary: Urbanization and human activities have significant impacts on ecosystems and host-pathogen interactions. Urban pollinator insects, such as bumblebees, are affected by various stressors, such as habitat loss and reduced floral resources, which can influence parasite transmission. This study used DNA-based diagnostics to investigate the occurrence of parasites in two bumblebee species and found that infection rates differed between the species and were influenced by ecological variables. The findings highlight the importance of species-specific conservation measures and considering the indirect effects of flower planting on parasite transmission and pollinator biodiversity.
ECOLOGY AND EVOLUTION
(2023)
Review
Biology
Amanda E. Martin, Jessica K. Lockhart, Lenore Fahrig
Summary: Ecologists often believe that weak dispersers are more vulnerable to land use intensification, but our review of empirical evidence found that only 56% of tests supported this prediction. Strong dispersers may also be at risk. Factors such as location, taxonomic group, and land use type influence the vulnerability of species. Overall, weak dispersal should not be used as a general indicator of species risk.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biodiversity Conservation
David L. Stokes, Arianne F. Messerman, David G. Cook, Leyna R. Stemle, Julian A. Meisler, Christopher A. Searcy
Summary: The study used a 19-year dataset to examine the effectiveness of current conservation efforts for the Sonoma County distinct population segment of California tiger salamanders. The results showed a 48% decrease in relative larval densities over the study period, highlighting the inadequacy of the current conservation approach and emphasizing the need for active management of preserves to effectively conserve the species.
BIOLOGICAL CONSERVATION
(2021)
Article
Environmental Sciences
Michelle Ward, James E. M. Watson, Hugh P. Possingham, Stephen T. Garnett, Martine Maron, Jonathan R. Rhodes, Chris MacColl, Richard Seaton, Nigel Jackett, April E. Reside, Patrick Webster, Jeremy S. Simmonds
Summary: This study provides a comprehensive assessment of the extirpation of threatened birds in Australia by mapping their past and current potential habitats. The results indicate a significant loss of habitat and range contraction for these species, with some having been extirpated from the majority of their former potential habitat.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Ecology
Anna C. C. Nisi, John F. F. Benson, Richard King, Christopher C. C. Wilmers
Summary: A rigorous understanding of how environmental conditions affect population dynamics is crucial for species conservation. This study analyzed an 11-year dataset on puma space use, mortality, and reproduction to quantify the impacts of living in a fragmented landscape on individual survival and population dynamics. The results showed that long-term exposure to housing density led to increased mortality risk for female pumas, resulting in source-sink dynamics and reduced female survival in more developed areas. Habitat selection was found to be a better proxy for habitat quality in predicting source areas for large carnivores compared to time-of-day-independent habitat selection. The study highlights the importance of conserving high-quality source habitat and linking landscape conditions to population dynamics for effective conservation.
ECOLOGICAL APPLICATIONS
(2023)
Article
Biodiversity Conservation
Fernando Ascensao, Marcello D'Amico, Eloy Revilla, Henrique M. Pereira
Summary: Assessing the impacts of road density on bird species occurrence and community composition, this study utilized a large citizen-science dataset to model the effects. The results showed that different bird species respond differently to roads, leading to changes at the community level. The study highlights the importance of considering road effects on biodiversity in landscape and road-network management, and suggests tailored conservation and compensation actions based on species responses.
BIOLOGICAL CONSERVATION
(2022)
Article
Ecology
Adam Kimberley, Danny Hooftman, James M. Bullock, Olivier Honnay, Patricia Krickl, Jessica Lindgren, Jan Plue, Peter Poschlod, Anna Traveset, Sara A. O. Cousins
Summary: Increasing landscape connecting elements cannot compensate for large-scale grassland area loss, leading to significant declines in both structural and functional connectivity. Generalist species are negatively affected by connectivity, with structural connectivity having the strongest impact, while functional connectivity determines the presence of grassland specialist species in focal grasslands.
Article
Ecology
Leonardo Vilas-Boas M. P. de Cerqueira, Daniel Gonzalez Tokman, Cesar M. A. Correa, Danielle Storck-Tonon, Mario Cupello, Carlos A. Peres, Renato Portela Salomao
Summary: Fragmentation and degradation of natural landscapes can adversely affect animal populations, including dung beetles. Insularization, particularly in dam-created land-bridge islands, leads to habitat loss and fragmentation, impacting terrestrial biodiversity. This study found that higher forest cover positively influenced dung beetle body size, but the effects of insularization varied among species. The proportion of closed-canopy forest also impacted physiological attributes of the dung beetles. These findings contribute to understanding the effects of habitat fragmentation in aquatic matrices on insect assemblages.
ECOLOGY AND EVOLUTION
(2023)
Article
Ecology
Erin Simons-Legaard, Daniel Harrison, Jeffrey Hepinstall-Cymerman, David Payer
Summary: Maintaining sufficient habitat, especially for adult females, is crucial for the conservation of American martens in commercial forestlands.
Article
Forestry
Julia Perez Cabral, Deborah Faria, Jose Carlos Morante-Filho
Summary: Biodiversity-friendly agricultural systems, such as cocoa agroforestry, play a crucial role in maintaining native species and providing habitats for various bird groups. The study found that landscapes with more forest cover and fewer cattle pastures support higher richness and abundance of frugivorous birds in cocoa agroforests, while an increase in cattle pasture negatively impacts all bird groups evaluated. Local vegetation structure, such as canopy closure and number of cocoa trees, also influences the abundance of insectivorous and non-forest bird species in cocoa agroforestry systems.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Ornithology
Ivan De La Hera, Guillermo Fandos, Javier Fernandez-Lopez, Alejandro Onrubia, Anton Perez-Rodriguez, Javier Perez-Tris, Jose Luis Telleria
Article
Infectious Diseases
Florian Binetruy, Christine Chevillon, Benoit de Thoisy, Stephane Garnier, Olivier Duron
TICKS AND TICK-BORNE DISEASES
(2019)
Article
Environmental Sciences
Folkert van Oort, Fabrice Monna, Stephane Garnier
WATER AIR AND SOIL POLLUTION
(2020)
Review
Ecology
Jean-Christophe Foltete, Paul Savary, Celine Clauzel, Marc Bourgeois, Xavier Girardet, Yohan Saharoui, Gilles Vuidel, Stephane Garnier
Article
Ornithology
Ivan de la Hera, Jordi Gomez, Eileen Dillane, Azaitz Unanue, Anton Perez-Rodriguez, Javier Perez-Tris, Maria Torres-Sanchez
JOURNAL OF AVIAN BIOLOGY
(2020)
Article
Ecology
Antoine Perrin, Aurelie Khimoun, Bruno Faivre, Anthony Ollivier, Nyls de Pracontal, Franck Theron, Maxime Loubon, Gilles Leblond, Olivier Duron, Stephane Garnier
Summary: The study found that habitat fragmentation led to loss and differentiation of neutral genetic diversity, resulting in divergence of genetic pools at a small spatial scale. The patterns of genetic diversity observed for TLR4 and TLR5 were consistent with neutral genetic patterns, while those observed for TLR3 and TLR21 were not. This suggests that the dominant evolutionary force shaping immunogenetic diversity may vary depending on the loci considered.
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
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
Ecology
Paul Savary, Jean-Christophe Foltete, Maarten J. van Strien, Herve Moal, Gilles Vuidel, Stephane Garnier
Summary: This study examined the influence of habitat quantity and spatial configuration on genetic structure, showing that measuring the amount of reachable habitat (ARH) can effectively describe habitat patterns and predict genetic structure. ARH metrics were found to be relevant predictors of genetic structure components, demonstrating significant impact on allelic richness and genetic differentiation.
Article
Computer Science, Information Systems
Paul Savary, Jean Christophe Foltete, Stephane Garnier
Summary: Least-cost path modeling is crucial for biodiversity conservation and landscape planning, but it is also influenced by cost scenarios. The study found that the spatial overlap of LCPs is more sensitive to cost scenarios, and highly correlated CD matrices can be derived from different cost scenarios. Therefore, when using LCP modeling, factors such as the range of cost values, landscape composition, and configuration variables should be considered.
INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE
(2022)
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.
Article
Biodiversity Conservation
Alexandrine Daniel, Paul Savary, Jean-Christophe Foltete, Aurelie Khimoun, Bruno Faivre, Anthony Ollivier, Cyril Eraud, Herve Moal, Gilles Vuidel, Stephane Garnier
Summary: This study validates the effect of habitat connectivity on population genetic structure using landscape graphs constructed by different methods. The results show that these graphs have a certain reliability in reflecting the influence of connectivity on genetic structure, but the ecological relevance and data requirements of different construction methods are not straightforward and need to be considered on a case-by-case basis.
CONSERVATION BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Antoine Perrin, Aurelie Khimoun, Anthony Ollivier, Yves Richard, Anton Perez-Rodriguez, Bruno Faivre, Stephane Garnier
Summary: There is ongoing debate among ecologists about the effects of habitat fragmentation on biodiversity, and whether these effects are positive or negative. This study found that habitat fragmentation has a greater impact on parasite prevalence in birds than habitat loss or landscape heterogeneity. The effects of fragmentation also vary between different regions.
Article
Biochemistry & Molecular Biology
Paul Savary, Jean-Christophe Foltete, Herve Moal, Gilles Vuidel, Stephane Garnier
Summary: In this study, the reliability of cost value inference in connectivity models was assessed under different migration rates, population spatial patterns, and degrees of population size heterogeneity. The study also examined whether considering intra-population variables improved the inference when drift was spatially heterogeneous. The results showed that considering intra-population variables can improve the reliability of cost value inference and better identify the true cost scenarios in certain situations.
MOLECULAR ECOLOGY RESOURCES
(2023)