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59. Vigie-Chiro : 9 ans de suivi des tendances des espèces communes

Author

Kerbiriou, Christian, Julien, Jean-François, Bas, Yves, Marmet, Julie, Le Viol, Isabelle, Lorrillièr, Romain, Azam, Clémentine, Gasc, Amandine, Lois, Grégoire, Lorrilliere, Romain, Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDE.BE] Environmental Sciences/Biodiversity and Ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

International audience; le programme Vigie-Chiro regroupe 250 observateurs et repose sur trois protocoles complémentaires: le circuit routier, le circuit pédestre et le poste fixe. De 2006 à 2014, il a déjà permis de collecter des enregistrements sur 284 circuits routiers et pédestres, totalisant 111000 contacts. Pour évaluer les variations d'abondance des populations au cours du temps, nous avons eu recours à des modèles linéaires généralisés mixtes (GLMM) pour prendre en compte des variations inter-annuelles de l'effort d'échantillonnage. Il est apparu clairement que certaines espèces déclinent très fortement comme Pipistrellus pipistrellus, Nyctalus leisleri et Eptesicus serotinus, tandis que P. kuhlii ou le groupe des Myotis présentent une tendance significative à l'augmentation jusqu'en 2013. N. noctula quant à elle, présente sur la période étudiée d'importantes fluctuations. Les causes responsables de ces variations de populations restent cependant à clarifier. Mots-clés.-Tendances de populations ; Suivi ultrasonore standardisé.

Published
2015

60. Potential of bat pass duration measures for studies of bat activity.

Author

Kerbiriou, Christian, Bas, Yves, le Le Viol, Isabel, Lorrilliere, Romain, Mougnot, Justine, and Julien, Jean François

Subjects
*BAT ecology, *ACOUSTIC transducers, *BATS, *WEATHER, *BAT sounds
Abstract

Acoustic detectors have become increasingly used by bat workers to investigate bat ecology and assess the impacts of anthropogenic pressures. Within these studies, the metric used, 'bat activity', is based on the number of bat passes, without considering the bat pass duration (i.e. each event of a bat detected within the range of an ultrasonic detector). We expected that bat pass duration may contain information about site quality in terms of foraging potential. Because bats are expected to have a more sinuous trajectory and slower velocity when they exhibit foraging behaviour, as opposed to commuting behaviour, we hypothesize a longer bat pass duration in favourable habitats; during seasons with important energetic demands; or during night peak activity. We used datasets from a large-scale acoustic bat survey (n = 2890 sites), with a total of 24,597 bat pass measures from 6 taxa, and performed GLMM modelling. We detected a significant effect of habitat type on bat pass duration for five taxa. Shorter bat pass durations were detected at the beginning of the night. We detected longer pass durations during the lactation period or just before hibernating, while weather conditions or ageing and wear of the detector rarely influenced bat pass duration. Bat pass duration appears to be a simple and easy measure for position calls on a gradient between commuting vs. foraging behaviour. We suggest that the traditional measure of bat activity may be weighted by bat pass duration by giving more weight to events with potentially stronger links to foraging behaviour. [ABSTRACT FROM AUTHOR]

Published
2019
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61. Bat overpasses: An insufficient solution to restore habitat connectivity across roads.

Author

Struebig, Matthew, Julien, Jean‐François, Claireau, Fabien, Bas, Yves, Kerbiriou, Christian, Puechmaille, Sébastien J., and Allegrini, Benjamin

Subjects
FRAGMENTED landscapes, BATS, TRANSPORTATION & the environment, ROOSTING, POPULATION dynamics, ANIMAL feeding behavior
Abstract

Copyright of Journal of Applied Ecology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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62. Classification de signaux acoustiques : Classification de matrices cepstre par Support Vector Machine

Author

Dufour, Olivier, Glotin, Hervé, Giraudet, Pascale, Artières, Thierry, Bas, Yves, Laboratoire des Sciences de l'Information et des Systèmes (LSIS), Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Université de Toulon (UTLN)-Aix Marseille Université (AMU), Machine Learning and Information Access (MLIA), Laboratoire d'Informatique de Paris 6 (LIP6), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), LSIS, and Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Centre National de la Recherche Scientifique (CNRS)

Subjects
[INFO]Computer Science [cs], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

LSIS - ADEME - BIOTOPE; no abstract

Published
2013

66. Classification de signaux acoustiques : Recherche des valeurs optimales des 17 paramètres d'entrée de la fonction melfcc

Author

Dufour, Olivier, Glotin, Hervé, GIRAUDET, Pascale, Artières, Thierry, Bas, Yves, Laboratoire des Sciences de l'Information et des Systèmes (LSIS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Centre National de la Recherche Scientifique (CNRS), Machine Learning and Information Access (MLIA), Laboratoire d'Informatique de Paris 6 (LIP6), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), LSIS, and Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Université de Toulon (UTLN)-Aix Marseille Université (AMU)

Subjects
[INFO]Computer Science [cs], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

LSIS - ADEME - BIOTOPE; no abstract

Published
2013

67. Low-intensity agriculture increases farmland bird abundances in France

Author

DOXA Aggeliki, BAS Yves, PARACCHINI Maria-Luisa, POINTEREAU Philippe, TERRES Jean, and JIGUET Frederic

Abstract

1. It is now widely accepted that agricultural intensification has highly contributed to the observed sharp decline of farmland biodiversity over the last decades. However, in some areas, farming practices continue to favor the existing biodiversity. These areas are referred to as High Nature Value farmlands. The identification of agricultural areas that still support a high level of biological diversity and the quantification of the impact that agricultural practices have on the existing biodiversity are major challenges for biological conservation and environmental politics. 2. Here we cross-validate results obtained from widely used indicators in Europe, that describe ecological changes linked to agricultural activities, namely the High Nature Value (HNV) farmland Indicator and the Common Bird Indicator. 3. Our results confirm our initial prediction that farmland areas estimated as having a high value for nature ¿ from agriculture statistics and landscape elements - effectively hold enhanced levels of biological diversity. 4. Comparing the temporal trend in the Farmland Bird Indicator (FBI) inside and outside HNV farmland, we observed higher trend in HNV than in non-HNV areas. 5. We found that HNV farmlands do not hold more bird species but more specialized bird communities than non-HNV farmlands. In addition, specialist bird species are significantly more abundant in HNV farmlands., JRC.H.5-Rural, water and ecosystem resources

Published
2010

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