Responses of Arvicola terrestris scherman populations to agricultural practices, and to Talpa europaea abundance in eastern France

Morilhat, Céline; Bernard, Nadine; Bournais, Corentin; Meyer, Caroline; Lamboley, Christophe; Giraudoux, Patrick

doi:10.1016/j.agee.2007.02.005

Cited by 23 publications

(19 citation statements)

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“…Firstly, numerous species have been shown to respond to landscape level effects whereby densities respond to composition or structure of landscape in a surrounding neighbourhood. Examples include Tetrao urogallus (Graf et al, 2005), Echinococcus multilocularis (Giraudoux et al, 2003), Arvicola terrestris (Fichet-Calvet et al, 2000; Giraudoux et al, 2007; Morilhat et al, 2007) and Microtus arvalis (Delattre et al, 1999, 2006; Duhamel et al, 2000), the latter two being small mammal species of the sub-family Arvicolinae . Here effects of composition and structure in buffers surrounding traplines were not considered, largely due to identifiability issues associated with the required increased level of data mining and the small sample size.…”

Section: Discussionmentioning

confidence: 99%

Modelling and spatial discrimination of small mammal assemblages: An example from western Sichuan (China)

Vaniscotte¹,

Pleydell²,

Raoul³

et al. 2009

Ecological Modelling

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We investigate the relationship between landscape heterogeneity and the spatial distribution of small mammals in two areas of Western Sichuan, China. Given a large diversity of species trapped within a large number of habitats, we first classified small mammal assemblages and then modelled the habitat of each in the space of quantitative environmental descriptors. Our original two step "classify then model" procedure is appropriate for the frequently encountered study scenario: trapping data collected in remote areas with sampling guided by expert field knowledge.In the classification step, we defined assemblages by grouping sites of similar species composition and relative densities using an expert-class-merging procedure which reduced redundancy in the habitat factor used within a multinomial logistic regression predicting species trapping probabilities. Assemblages were thus defined as mixtures of small mammal frequency distributions in discrete groups of sampled sites.In the modelling step, assemblages' habitats and environments of the two sampled areas were discriminated in the space of remotely sensed environmental descriptors. First, we compared the discrimination of assemblage/study areas by linear and non-linear forms of Discriminant Analysis (Linear Discriminant Analysis versus Mixture Discriminant Analysis) and of Multiple Regression (Generalized Linear Models versus Multiple Adaptive Regression Splines). The "best" predictive modelling technique was then used to quantify the contribution of each environmental variable in discriminations of assemblages and areas.Mixtures of Gaussians provided a more efficient model of assemblage coverage in environmental space than a single Gaussian cluster model. However, non-linearity in assemblage response to

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Section: Discussionmentioning

confidence: 99%

Modelling and spatial discrimination of small mammal assemblages: An example from western Sichuan (China)

Vaniscotte¹,

Pleydell²,

Raoul³

et al. 2009

Ecological Modelling

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“…Concerns about the impact of sheep on the population of water voles and hence on the population of eagle owls led to this preliminary investigation. Because water voles are susceptible to farming and grazing regimes (Morilhat et al 2007;Macpherson & Bright 2011), I predicted that sheep will to some extent reduce their populations.…”

Section: Resultsmentioning

confidence: 99%

Grazing by sheep Ovis aries reduces island populations of water voles Arvicola amphibius

Frafjord

2014

Fauna Norv.

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1Frafjord K. 2014. Grazing by sheep Ovis aries reduces island populations of water voles Arvicola amphibius. Fauna norvegica 34: 79-81.The population of water voles Arvicola amphibius was surveyed on 21 islands in the Solvaer archipelago, northern Norway, in August 2012; 11 islands with semi-wild domestic sheep Ovis aries and 10 islands without sheep. Signs from water voles are very easy to detect and were used as a measure of the population (on a scale 0-10), and the numbers of sheep were counted. The ranking of signs on islands with and without sheep was compared, and a significant difference was found. Islands with sheep had, with one exception, only very small and fragmented populations of water voles, the one exception being a fairly large Carex swamp that was not grazed by the sheep and where a moderate-sized population of voles was found. Islands without sheep had much larger populations of water voles, giving a ranking about four times higher. One reason for the devastating effect of sheep on water voles is probably the fact that the sheep are living year-round on these islands with no supplemental food.

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“…De cara a testar también el posible papel de la gestión agro-ganadera sobre la abundancia de rata topera, se caracterizó el manejo seguido en los últimos años en cada parcela muestreada mediante entrevistas con los agricultores (Morilhat et al 2007) incluyendo en los análisis la presencia de trébol, el uso de abono, si se trataba de una pradera sembrada o un prado y el tipo de aprovechamiento ganadero (oveja, vaca o yegua).…”

Section: Gestión Agro-ganaderaunclassified

Influencia de la gestión agroganadera y las variables climáticas y topográficas en los cambios de abundancia de la rata topera (Arvicola scherman) en el Oeste del Pirineo

Villanúa

Díez-Huget

Leránoz

et al. 2021

ECOS

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La rata topera (Arvicola scherman) es una especie de gran interés, tanto por su papel como presa de multitud de depredadores, como por el impacto de sus daños sobre la agricultura. Las variaciones en su abundancia poblacional y el papel de los factores que la modulan han sido ampliamente estudiadas en el norte de Europa, pero hasta el momento, se carecía de esta información para las poblaciones del Pirineo. En el presente trabajo se exponen los resultados obtenidos en el plan de monitorización de la especie en Navarra desde 2016 hasta 2020, describiendo tanto los cambios de abundancia registrados, como la influencia de los factores ambientales y de gestión agroganadera analizados. Describimos una variación de la abundancia a lo largo del año, con valores significativamente mayores en primavera que en verano; y entre los 5 años de muestreo, con una abundancia significativamente mayor en 2016 y 2020. La pluviometría acumulada en los meses previos al censo y el pastoreo con ovejas han sido los factores retenidos en los modelos con influencia significativa. Ambos han ejercido un efecto positivo sobre la rata topera, aumentando su abundancia al incrementarse la pluviometría y con el aprovechamiento con ganado ovino. Se discute el papel de estos factores y otras variables de estructura del paisaje y de gestión agrícola en los cambios de abundancia poblacional de la rata topera.

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Responses of Arvicola terrestris scherman populations to agricultural practices, and to Talpa europaea abundance in eastern France

Cited by 23 publications

References 24 publications

Modelling and spatial discrimination of small mammal assemblages: An example from western Sichuan (China)

Modelling and spatial discrimination of small mammal assemblages: An example from western Sichuan (China)

Grazing by sheep Ovis aries reduces island populations of water voles Arvicola amphibius

Influencia de la gestión agroganadera y las variables climáticas y topográficas en los cambios de abundancia de la rata topera (Arvicola scherman) en el Oeste del Pirineo

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