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Modeling spatio-temporal activity dynamics of the small relict marsupial Dromiciops gliroides

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Abstract

Spatial and temporal heterogeneity can affect animal activity patterns under environmental conditions that fluctuate over time and space. The activity timing and habitat structure are essential components of the animals' choices. Here we studied the spatio-temporal activity dynamics of an arboreal marsupial (Dromiciops gliroides) with a key ecological role, endemic to the Andean Patagonian forest. Using camera traps and live traps, we determined temporal variations and the effect of the spatial variables at the micro (habitat structure)- and macro (forest type and geographic location)-scales on the activity patterns of D. gliroides. We built a hierarchical regression model to accommodate variation at both temporal and spatial levels. At a temporal level, we found that D. gliroides was affected by seasonality, increasing their activity toward the end of the summer and the beginning of autumn. At a spatial level, habitat structure was extremely important for this marsupial, particularly shrub cover which positively affected D. gliroides activity. Behavioral adjustments that we documented may be driven by differences in resource availability or predator avoidance. These findings help to understand the mechanisms modulating the activity of D. gliroides, essential for the conservation of this species with an ecological role that allows extended positive consequences to the whole forest community. Our results further support the importance of understory conservation for the survival of this species and warn about the negative consequences of habitat degradation.

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We thank all the volunteers who participated in the fieldwork. We also thank the National Parks Administration, Secretary of the Environment of Río Negro, and Arelauquen Golf & Country Club for granting permits to work in the area. We are grateful to Idea Wild foundation for granting equipment and to Juan Manuel Morales and the course entitled “Modelos en Ecología” for the discussions about our data analysis. We also thank Soham Mehta for his English edition, and Ricardo Sage and Francisco Fonturbel for providing comments and suggestions that helped to improve the quality of the manuscript.

Funding

Partial financial support was received from Conicet (Comision Nacional de Investigaciones cientificas y tecnicas).

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Authors and Affiliations

  1. INIBIOMA, CONICET-Universidad Nacional del Comahue, Quintral 1250, 8400, Bariloche, Río Negro, Argentina

    M. Soledad Vazquez, Luca Schenone & Guillermo C. Amico

  2. Laboratorio de Limnología, INIBIOMA, CONICET-Universidad Nacional del Comahue, Bariloche, Argentina

    Luca Schenone

  3. Grupo de Ecología de Invasiones, INIBIOMA, CONICET-Universidad Nacional del Comahue, Av. de los Pioneros 2350, 8400, Bariloche, Río Negro, Argentina

    Mariano A. Rodriguez-Cabal

  4. Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT, 05405, USA

    Mariano A. Rodriguez-Cabal

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All authors contributed to the conceptualization. MSV y GA participated in the study conception and design. Material preparation and data collection were performed by MSV, and data analysis was performed by LS. The first draft of the manuscript was written by MSV and all authors commented, reviewed, and edited the manuscript. All authors read and approved the final manuscript.

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Vazquez, M.S., Schenone, L., Rodriguez-Cabal, M.A. et al. Modeling spatio-temporal activity dynamics of the small relict marsupial Dromiciops gliroides. Mamm Biol 103, 1–12 (2023). https://doi.org/10.1007/s42991-022-00331-6

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