Browsing by Author "Zorondo-Rodriguez, Francisco"

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    Environmental and biotic filters interact to shape the coexistence of native and introduced bees in northern Patagonian forests
    (2023) Vergara, Pablo M.; Fierro, Andres; Carvajal, Mario A.; Alaniz, Alberto J.; Zorondo-Rodriguez, Francisco; Cifuentes, Maria C.; Castro, Sergio A.
    Native and introduced species can coexist in rich ecosystems where competition for resources is less intense; however, native species can be excluded from suitable habitats hosting a high abundance of introduced species. To test these hypotheses, we estimated the probability of introduced bees (buff-tailed bumblebees and honeybees) to co-occur and dominate giant bumblebees in forested landscapes of northern Patagonia. We evaluated the effects of 29 remote-sensing variables of forest ecosystems on bee abundance using data from 56 landscapes. Then, we used a probabilistic Bayesian model to estimate the effects of the most important predictors of bee abundance on their co-occurrence and dominance probabilities. Introduced and native bees exhibited heterogeneous and scale-dependent responses to environmental conditions, with only six variables affecting their cooccurrence and dominance probabilities. A high maximum temperature was associated with both a decreased co-occurrence and an increased dominance of introduced bumblebees, and the opposed pattern was found for vegetation continuous fields, an index of canopy continuity. Similar responses were found for the co-occurrence probability of honeybees and giant bumblebees. Thus, species dominance and co-occurrence changed differently along environmental gradients, with co-occurrence increasing as native and introduced species become more abundant. A high dominance of introduced bees in unsuitable habitats suggests interspecific competition is strengthened as resources become scarcer, thus reinforcing the idea that abiotic and biotic filters interact with each other.
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    Where Forest Policy and Social Support Collide: Perceptions and Knowledge of Landholders About Forest Management in Central Chile
    (2023) Zorondo-Rodriguez, Francisco; Gomez-Fernandez, Nicolas A.; Bondoux, Arthur; Alfonso, Amanda; Carrasco-Oliva, Gabriela; Abasolo, Francisco; Rodriguez-Gomez, Gloria; Root-Bernstein, Meredith; Garcia, Claude A.
    Public perceptions and knowledge of forestry institutions are key for effective governance. Drawing from research among landholders in Chile through structured questionnaires, we examine the role that knowledge of forest regulations and agencies plays in relation to public perceptions of the forestry agency, and how tenure of forest land affects this association. Multivariate regressions showed a U-shaped relationship between perceptions and knowledge, explained by ownership of forested land. Landholders with more hectares of native forest reported a negative relationship between knowledge and perception, whereas landowners with fewer hectares of native forest reported a positive association. Our results suggest a forest management paradox: forestry institutions are established to sustainably manage and conserve biodiversity, especially for native threatened forests; nonetheless, the perceptions of landholders with greater areas of forest, who should be the targeted partners of these institutions, appear to become more negative as their knowledge of forestry institutions increased. Our results provide key information for adapting forestry institutions to socio-ecological contexts to produce effective outcomes..