Search results for: Nathan Ranc

Items from 1 to 10 out of 10 results

article

The aeroecology of atmospheric convergence zones: the case of pallid swifts

Lyndon Kearsley, Nathan Ranc, Christoph M. Meier, Carlos Miguel Pacheco, more

Oikos > 2022 > 6 > n/a - n/a

Trans‐Saharan migratory bird species encounter large scale seasonal atmospheric convergence zones, where opposing monsoon and continental air masses meet. These macro‐scale atmospheric conditions determine local weather, influence migratory and foraging behaviour and seasonal bird survival rates. Here, we investigate the flight behaviour of pallid swifts Apus pallidus, a small aerial insectivore,...

article

Dietary flexibility promotes range expansion: The case of golden jackals in Eurasia

József Lanszki, Matt W. Hayward, Nathan Ranc, Andrzej Zalewski

Journal of Biogeography > 49 > 6 > 993 - 1005

Aim Ongoing global changes can lead to the expansion of species' geographical range. Exploring the drivers of the successful ongoing expansion of the golden jackal across Europe is essential to understand the species' trophic ecology. We analysed which climatic and environmental factors affected the dietary composition of golden jackals and compared these drivers in the species' historic and recently...

article

Memory drives the formation of animal home ranges: Evidence from a reintroduction

Nathan Ranc, Francesca Cagnacci, Paul R. Moorcroft, Tim Coulson

Ecology Letters > 25 > 4 > 716 - 728

Most animals live in home ranges, and memory is thought to be an important process in their formation. However, a general memory‐based model for characterising and predicting home range emergence has been lacking. Here, we use a mechanistic movement model to: (1) quantify the role of memory in the movements of a large mammal reintroduced into a novel environment, and (2) predict observed patterns...

article

Temporal scale of habitat selection for large carnivores: Balancing energetics, risk and finding prey

Anna C. Nisi, Justin P. Suraci, Nathan Ranc, Laurence G. Frank, more

Journal of Animal Ecology > 91 > 1 > 182 - 195

When navigating heterogeneous landscapes, large carnivores must balance trade‐offs between multiple goals, including minimizing energetic expenditure, maintaining access to hunting opportunities and avoiding potential risk from humans. The relative importance of these goals in driving carnivore movement likely changes across temporal scales, but our understanding of these dynamics remains limited...

article

Large carnivore expansion in Europe is associated with human population density and land cover changes

Marta Cimatti, Nathan Ranc, Ana Benítez‐López, Luigi Maiorano, more

Diversity and Distributions > 27 > 4 > 602 - 617

Aim The recent recovery of large carnivores in Europe has been explained as resulting from a decrease in human persecution driven by widespread rural land abandonment, paralleled by forest cover increase and the consequent increase in availability of shelter and prey. We investigated whether land cover and human population density changes are related to the relative probability of occurrence of three...

article

Knowing your neighbours: How memory‐mediated conspecific avoidance influences home ranges

Nathan Ranc, Francesca Cagnacci, Paul R. Moorcroft, Jennifer Gill

Journal of Animal Ecology > 89 > 12 > 2746 - 2749

In Focus: Ellison, N., Hatchwell, B. J., Biddiscombe, S. J., Napper, C. J., & Potts, J. R. (2020). Mechanistic home range analysis reveals drivers of space use patterns for a non‐territorial passerine. Journal of Animal Ecology. https://doi.org/10.1111/1365‐2656.13292. Most animals for which space use has been studied restrict their movements into a constrained spatial area: their home range....

article

Stay home, stay safe—Site familiarity reduces predation risk in a large herbivore in two contrasting study sites

Benedikt Gehr, Nadège C. Bonnot, Marco Heurich, Francesca Cagnacci, more

Journal of Animal Ecology > 89 > 6 > 1329 - 1339

Restricting movements to familiar areas should increase individual fitness as it provides animals with information about the spatial distribution of resources and predation risk. While the benefits of familiarity for locating resources have been reported previously, the potential value of familiarity for predation avoidance has been accorded less attention. It has been suggested that familiarity...

article

Cluster-based trajectory segmentation with local noise

Maria Luisa Damiani, Fatima Hachem, Hamza Issa, Nathan Ranc, more

Data Mining and Knowledge Discovery > 2018 > 32 > 4 > 1017-1055

We present a framework for the partitioning of a spatial trajectory in a sequence of segments based on spatial density and temporal criteria. The result is a set of temporally separated clusters interleaved by sub-sequences of unclustered points. A major novelty is the proposal of an outlier or noise model based on the distinction between intra-cluster (local noise) and inter-cluster noise (transition...

article

Golden jackal expansion in Europe: First telemetry evidence of a natal dispersal

József Lanszki, Gergely Schally, Miklós Heltai, Nathan Ranc

Mammalian Biology - Zeitschrift f�r S�ugetierkunde > 2018 > 88 > C > 81-84

The Eurasian golden jackal (Canis aureus) is currently undergoing a rapid range expansion. Originally restricted to small coastal areas of the Mediterranean and Black seas, this highly adaptive and generalist species is now reproducing throughout Southeastern and Central Europe. In addition, individuals are being seen further to the North and West. This continental-scale phenomenon is receiving high...

article

Performance tradeoffs in target‐group bias correction for species distribution models

Nathan Ranc, Luca Santini, Carlo Rondinini, Luigi Boitani, more

Ecography > 40 > 9 > 1076 - 1087

Species distribution models (SDMs) are often calibrated using presence‐only datasets plagued with environmental sampling bias, which leads to a decrease of model accuracy. In order to compensate for this bias, it has been suggested that background data (or pseudoabsences) should represent the area that has been sampled. However, spatially‐explicit knowledge of sampling effort is rarely available....

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