Browsing by Author "Barcelo, Matias"

Now showing 1 - 5 of 5
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    A new flower fly species of Cepa Thompson & Vockeroth (Diptera: Syrphidae from the Valdivian evergreen forest hotspot, Chile
    (2019) Barahona-Segovia, Rodrigo M.; Barcelo, Matias
    The Neotropical region has a high species richness of flower flies. However, there are many known species awaiting proper description. Cepa Thompson & Vockeroth is a Neotropical genus with scattered records and few individuals collected of its three species. In the present study, a female of a new species of Cepa is described, C. simonettii Barahona-Segovia sp. nov., from the Valdivian evergreen forest representing the first record of this genus in Chile. In addition, an identification key to all known species of Cepa is provided. Morphological and biogeographic aspects of this new Cepa species are discussed, as well as the potential phylogenetic relationship with other members of Merodontini.
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    Enhancing habitat quality for small mammals at young pine plantations after clearcutting
    (2021) Barcelo, Matias; Rubio, Andre, V; Andres Simonetti, Javier
    Monoculture plantations of exotic Monterey pine (Pinus radiata) is a widespread practice which reduces richness and abundance of native species. The presence of shrub vegetation in mature pine plantations confers structural complexity, enabling the presence of native wildlife, and potentially mitigating the impacts of these plantations. However, little is known about the effect of shrub cover in young pine plantations after clearcutting. We assessed if shrub vegetation cover contributes to enhancing habitat quality for small mammals by assessing the abundance and composition of small mammal assemblages in young pine plantations (15 years), and in the native temperate forest in central Chile. We found that a high development of shrub vegetation in young pine plantation increased both the abundance of small mammals, and the similarity of small mammal assemblages among habitat types. These findings support maintaining developed shrub vegetation in Monterrey pine plantations as a conservation strategy that could help reduce the negative impact of this monoculture and the impact of clearcutting.
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    Exploring links between local knowledge, values and livelihoods in land-sea interface: insights on emerging tradeoffs and change in Southern Chile
    (2024) Barcelo, Matias; Tengo, Maria; Simonetti, Javier A.; Gelcich, Stefan
    Local knowledge and values of coastal communities offer insights into the intricate human-nature relationships in the land-sea interface. Considering a diversity of values unveils how people perceive nature, encompassing both tangible and intangible dimensions, and this understanding is part of how they navigate dynamic environmental challenges by embracing livelihood diversification spanning land-sea activities. Better understanding of these values, relationships and diversification strategies can improve social-ecological systems theory and practice. Here we assess links between local knowledge, values and livelihoods in order to identify emerging tradeoffs. Using semi-structured interviews with qualitative and quantitative methods, we conducted a total of 88 interviews in five communities in Southern Chile. Local knowledge and values were collected as free-listing on terrestrial and marine species. We probed relationships between livelihood diversification and values, classified as relational, intrinsic, and instrumental. Our findings showed that marine species were most associated with instrumental values, while terrestrial species had a balance between relational, intrinsic and instrumental values. We observed that as communities expand their livelihoods and live closer to the city, they showed lower knowledge and values, and in these cases instrumental values predominate. Certain diversification strategies could lead to time constraints, impacting the transmission of knowledge and resulting in less values. Deeper and long-term cooperation between different actors to recover and protect different values is necessary to couple local knowledge and values with livelihood diversification. Our research provides valuable insights for policymakers aiming to develop holistic strategies that include relational values and leverage diverse knowledge systems to address contemporary environmental challenges.
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    From classical collections to citizen science: change in the distribution of the invasive blowfly Chrysomya albiceps (Wiedemann, 1819) in Chile
    (2021) Barahona-Segovia, Rodrigo M.; Barcelo, Matias
    Tracking the invasion of Chrysomya albiceps (Wiedemann, 1819) (Diptera: Calliphoridae) in South America has multiple distribution gaps. In the present study, we describe the distribution change of this invasive blowfly through time in Chile, using combined methods of collection of occurrences to fill these distributional gaps. We reconstruct the current distribution with entomological collection data, literature. and citizen science. We found that the distribution of C. albiceps expanded only in the central zone of Chile from 2006 to 2011. However, from 2015, the species was recorded in northern Chile. more than 1300 km away from the first locality recorded, through samples and citizen science. We discuss the distribution change and the possible cause of its expansion in the country.
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    Pathogen- and diet-dependent foraging, nutritional and immune ecology in mealworms
    (2011) Catalan, Tamara P.; Barcelo, Matias; Niemeyer, Hermann M.; Kalergis, Alexis M.; Bozinovic, Francisco
    Background: Feeding habits and dietary nutritional content may play a key role in pathogen-dependent foraging ecology, because mounting an effective immune response is costly for the host.