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Introduction
I study the dynamics of the environment from a modelling perspective through innovations in monitoring, statistics and data science.
Current institution
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March 2013 - August 2015
Publications
Publications (35)
Tracking environmental change is important to ensure efficient and sustainable natural resources management. Eastern Africa is dominated by arid and semi-arid rangeland systems, where extensive grazing of livestock represents the primary livelihood for most people. Despite several mapping efforts, eastern Africa lacks accurate and reliable high-res...
The endemic Magellanic Woodpecker (Campephilus magellanicus), the southernmost and largest extant congener of the Ivory‐billed woodpecker (C. principalis), is among the most iconic species of the Valdivian forest ecoregion. Threatened by habitat loss and fragmentation and with less than one‐third of its original extent remaining, the Valdivian ecor...
ContextInteractions between landscape-scale processes and fine-grained habitat heterogeneity are usually invoked to explain species occupancy in fragmented landscapes. In variegated landscapes, however, organisms face continuous variation in micro-habitat features, which makes necessary to consider ecologically meaningful estimates of habitat quali...
The ability of animals to collect and use environmental information in fragmented landscapes may considerably decrease as the spatial scale at which they search for feeding resources increases. Here, we used an individual-based model to assess the scale-dependent movement patterns of woodpeckers when searching for their main foraging resources (woo...
Tracking environmental change is important to ensure efficient and sustainable natural resources management. East Africa is dominated by arid and semi-arid rangeland systems, where extensive grazing of livestock represents the primary livelihood for most of the human population. Despite several mapping efforts, East Africa lacks accurate and reliab...
A correction to this paper has been published: https://doi.org/10.1007/s10336-021-01888-8
Animals with stable territories, specialized diets and narrow habitat choices, such as some woodpecker species, should concentrate foraging activity in areas of higher quality, a behavior consistent with the area-restricted search (ARS) behavior. The assessment of ARS behavior in specialized woodpeckers contributes to identify feeding areas importa...
In the Northern Hemisphere, several avian cavity excavators (e.g., woodpeckers) orient their cavities increasingly toward the equator as latitude increases (i.e. farther north), and it is proposed that they do so to take advantage of incident solar radiation at their nests. If latitude is a key driver of cavity orientations globally, this pattern s...
In the Northern Hemisphere, several avian cavity excavators (e.g., woodpeckers) orient their cavities increasingly toward the equator as latitude increases (i.e. farther north), and it is proposed that they do so to take advantage of incident solar radiation at their nests. If latitude is a key driver of cavity orientations globally, this pattern s...
One important landscape-scale consequence of deforestation is reduced connectivity, which has the potential to isolate populations in ways that affect genetic diversity and population structure. Among the many regions of the world where this scenario has played out is the South American temperate forest (SATF) in southern Chile, and there is now st...
Background
Large woodpecker species with stable territories, specialized diets and narrow habitat choices, such as the Magellanic Woodpecker (Campephilus magellanicus), are expected to adjust their movements based on the distribution of available resources within territories. Thus, Magellanic Woodpeckers should concentrate foraging activity in area...
Theoretical and empirical studies have addressed predator-prey relationships, but the relevance of individual prey species, prey species richness and environment on the niche and the distribution of specialist predators have been scarcely tested with a macroecological approach. Here we aim to analyze the niche and spatial distribution of the Magell...
Habitat restoration is a cornerstone of conservation, particularly for habitat‐limited species. However, restoration efforts are seldom rigorously monitored at meaningful spatial scales. Poor understanding of how species respond to habitat restoration programs limits conservation efficacy for habitat‐restricted species like the Golden‐winged Warble...
Context
The switching pattern between behavioral modes provides a mechanistic basis for understanding how animals perceive and memorize the habitat quality in their home ranges.
Objectives
We assessed if Magellanic woodpeckers (Campephilus magellanicus) move based on habitat quality at local (neighboring trees) and home range scales.
Methods
We u...
A major challenge for protected areas is providing wildlife with enough suitable habitat to cope with stochastic environment and increased pressure from the surrounding landscapes. In this study, we addressed changes in local populations of Magellanic Woodpeckers (Campephilus magellanicus) occupying three national parks of central-southern Chile. W...
Animals facing seasonal food shortage and habitat degradation may adjust their foraging behaviour to reduce intraspecific competition. In the harsh environment of the world's southernmost forests in the Magellanic sub-Antarctic ecoregion in Chile, we studied intersexual foraging differences in the largest South American woodpecker species, the Mage...
The microclimate of avian nest and roost sites affects reproduction and survival; therefore, environmental placement of these structures is of adaptive significance. It has been hypothesized that, to optimize thermal properties, at higher latitudes avian excavators should orient their cavities more toward the equator. In support of this, a meta-ana...
The avifauna of Mocha Island is analysed according to species richness, habitat use, and reproductive status, and the first quantitative population estimates of forest landbirds are presented basing on unbiased survey data as a basis for conservation. We recorded a total of 100 species, including non-breeders. Among all recorded taxa, landbirds (n...
Theoretical models predict that animals should make foraging decisions after assessing the quality of available habitat, but most models fail to consider the spatio-temporal scales at which animals perceive habitat availability. We tested three foraging strategies that explain how Magellanic woodpeckers (Campephilus magellanicus) assess the relativ...
Table A. Main behaviors elicited by Magellanic woodpeckers according to Short (1970) and classified into two behavioral states (see main text). Table B. Coefficients, standard errors and p-values from an ordinal regression model evaluating the contribution of the Plant Senescence Reflectance Index (PSRI, see text) to the observed decay state of the...
Tree data containing the following variables: PSRI = untransformed values of PRSI for all trees used by woodpeckers; Tree.stage = the foraging stage of each tree (unused trees: 0, used for foraging: 1, used for other behaviour: 2); Time = time step along the route; Route = the number of the route.
(XLSX)
Understanding how species respond to habitat structure in landscapes transformed by human activities is crucial to design management strategies that promote the conservation of wildlife in human-created lands. The aim of this study was to test the ecological hypothesis that fine-grain habitat structure may be an important determinant of habitat use...
Agonistic behavior in woodpeckers has been described for a wide range of species, although previous studies have not reported aggressive encounters resulting in the death of adults. In this study, we provide the first evidence of lethal agonistic behavior between two male Magellanic woodpeckers (Campephilus magellanicus), inhabiting Patagonia. This...
It is a long-standing question how tsunamis can influence wild populations of animals and plants. Here, we assessed short-term changes in the population of the criti-cally endangered Juan Fernández Firecrown (Sephanoides fernandensis) by using abundance data recorded 1 year before and 1 year after the 2010 Chilean tsunami. We tested that the abunda...
The American mink (Neovison vison) has been described as one of the worst invasive species in the northern hemisphere. Although some studies on the mink exist for the southern hemisphere, aside from impacts on marine and freshwater birds, its effect on other components of the biota is not well understood. Here, as a result of 3 different studies, w...
Natural catastrophes could damage island biodiversity and ecosystems, and their effects could become devastating if combined with human disturbances. In this study, we determined the effects of the tsunami occurred in Robinson Crusoe Island (Chile) on 27 February 2010 on an endangered soil–plant system. Using data of endemic Cabbage Trees (Dendrose...
Background/Question/Methods
Sexual differences in nest attendance of large woodpeckers are scarcely documented in spite of its importance in understanding the nesting biology of these vulnerable species. We studied nest attendance of three breeding pairs of Magellanic woodpeckers (Campephilus magellanicus), the largest extant woodpecker in the Am...
Background/Question/Methods
Understanding how woodpeckers select foraging trees is critical for the conservation of endangered woodpecker species, such as the largest South American woodpecker: Campephilus magellanicus. We assessed selection of individual trees of lenga (Nothofagus pumilio), coigüe (Nothofagus betuloides), ñirre (Nothofagus antar...
The abundance of woodland birds in fragmented forest landscapes may depend on the properties of patch networks. Understanding the consequences of deforestation on woodland birds, therefore, necessarily requires determining which changes in landscape structure make a major contribution to the degradation and subdivision of patch networks. In this st...
The level of specialization of endemic island birds to their native habitats could contribute importantly to increase their extinction risk. We used abundance obtained from mist-netting and radio telemetry data from one individual to determine the micro-habitat use pattern of Juan Fernandez Tit-tyrants (Anairetes fernandezianus) within native fores...
The level of specialization of endemic island birds to their native habitats could contribute importantly to increase their extinction risk. We used abundance obtained from mist-netting and radio telemetry data from one individual to determine the micro-habitat use pattern of Juan Fernandez Tit-tyrants (Anairetes fernandezianus) within native fores...
El efecto que tienen las perturbaciones causadas por el castor norteamericano (Castor canadensis) -introducido en la Reserva de Biosfera Cabo de Hornos- sobre especies de aves especialistas de hábitat forestales es poco conocido. Utilizando datos de telemetría determinamos qué atributos de las castoreras abandonadas tienen una mayor influencia en l...
