Fundacion CTF

Santiago, Chile

Fundacion CTF

Santiago, Chile
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Marin V.H.,University of Chile | Delgado L.E.,University of Chile | Tironi-Silva A.,Fundacion CTF | Finlayson C.M.,Charles Sturt University | Finlayson C.M.,Institute for Water Education
Wetlands | Year: 2017

Complexity is an accepted characteristic of social-ecological systems. However, its analysis has been mostly theoretical with few empirical studies. Complex systems share three features: radical openness (the system cannot be understood unless an extended, global, environment is considered), radical uncertainty (emergence and non-linearity make them impossible to be fully predictable) and contextuality (no unique way to know them). Social-ecological systems listed as important under international treaties, such as wetlands within the Ramsar Convention, share these features, which can be explored using case studies. In this article, we explore the complexities derived from the 2004 ecological change (i.e. the local collapse of an emblematic bird species) in the Carlos Anwandter Sanctuary, a Chilean coastal wetland, by means of two ten-year windows (scientific publications and Internet web pages). We based our analysis on the question: what is the state of knowledge, ten years after its ecological change? Results show many answers; science has several hypotheses with low testing possibilities. Still, civil society decided that only one (a forestry company guilty of producing the change) is valid. We discuss the role of international organizations when dealing with social-ecological conflicts and identify the conundrum that can develop in response to how these are handled. © 2017 Society of Wetland Scientists

PubMed | Fundacion CTF, Copenhagen University, Romanian Academy of Sciences, Stanford University and 5 more.
Type: Published Erratum | Journal: International journal of environmental research and public health | Year: 2015

The authors would like to add the following affiliation for Peter Sgaard Jrgensen of paper [1]: 8 International Network of Next-Generation Ecologists, Universitetsparken 15, Building 3, Copenhagen 2100, Denmark[...].

Delgado L.E.,Fundacion CTF | Delgado L.E.,University of Chile | Sepulveda M.B.,University of Chile | Marin V.H.,University of Chile
Ecosystem Services | Year: 2013

How much do ecosystems contribute to the wellbeing of rural populations in developing nations? In this article we provide an answer to this question through an eco-social study of two provisioning ecosystem services (wood from native forest and clean water) of the Aysén watershed in northern Chilean Patagonia. Social data was gathered by means of a semi-structured survey to rural households while ecological data was obtained from the available literature and Chilean Government databases. Results show that provisioning ecosystem services contribute, on average, 148. USD per month (range: 155-345. USD) to the livelihood of rural households. We discuss the potential effect of rural wood exploitation on native forest coverage and the role of uncertainties in the available information. © 2013 Elsevier B.V.

Delgado L.E.,Fundacion CTF | Delgado L.E.,University of Chile | Marin V.H.,University of Chile
Ecosystem Services | Year: 2016

The main objective of this article is to analyse the relationship between human well-being (HWB) and ecosystem services (ES). We studied the Río Cruces watershed (Chile) as a social-ecological system by means of a social survey and compared the results with those previously obtained at the Aysén watershed. We surveyed six localities characterized by different types of habitat. HWB was assessed by means of two indicators (material conditions and quality of life) and ES through the analysis of provisioning and regulating services. Results for Río Cruces show no significant HWB differences between localities, with the exception of life satisfaction (lower on isolated localities). The use of provisioning and regulating services did not differ between localities, with the exception of two components (wood and soil fertility), and we only found a significant positive correlation between regulating services and HWB material conditions. The comparison between watersheds show that changes in HWB material conditions and both types of ES are positively correlated. We conclude that the relationship between human well-being and ecosystem services seems to be contextual to the analysed social-ecological system and that generalizations across systems may not be possible. © 2016 Elsevier B.V.

Delgado L.E.,Fundacion CTF | Tironi A.,Fundacion CTF | Vila I.,University of Chile | Verardi G.,University of Santiago de Chile | And 3 more authors.
Latin American Journal of Aquatic Research | Year: 2014

We review in this article the 2004-2014 scientific information on the Río Cruces wetland ecosystem, Valdivia, Chile. This information is used in the generation of a conceptual ecosystem model, which is used in turn to generate a synthetic hypothesis about the regime shift during 2004/2005. The model is based on the concentration of suspended solids in the wetland as controlling variable, affected by watershed processes (e.g., clear-cut forestry) and re-suspension of sediments in the wetland affected by the presence or absence of macrophytes. © 2014, Escuela de Ciencias del Mar. All rights reserved.

Delgado L.E.,Fundacion CTF | Delgado L.E.,University of Chile | Marin V.H.,University of Chile
Ecosystem Services | Year: 2015

The analysis of temporal changes in the number of scientific articles written on ecosystem services shows an exponential growth from 1991 to 2013. However, it also shows a lack of information regarding the location of the studies and the type of ecosystem analyzed. A literature search showed that some regions (Antarctica) and ecosystems (urban) have been less studied. However, given the structure of the knowledge databases it is impossible to know if there are no studies or it is difficult to reach them. © 2015 Elsevier B.V.

Bird monitoring is frequent in wetlands; however, in the absence of information on other variables, trends in bird numbers are difficult to interpret. In this article we describe a methodology for bird's habitat area assessment based on remote sensing. We calibrated the methodology to study the changes in the habitat area of Cygnus melancoryphus, the black-necked swan, at the Carlos Anwandter Sanctuary, a wetland located in Valdivia, Southern Chile. Swan habitat area was estimated by means of the Normalized Difference Vegetation Index (NDVI) based on Landsat images and calibrated through spectral photography by means of a portable Tetracam ADC Camera. Results show that calibrated NDVI values from Landsat images can be used to estimate habitat area but not to separate individual species of vegetation. We also show that the joint analysis of habitat area and swan count can indeed be used to separate some of the scales of variability of bird counts: those with "local-influence" associated with changes in habitat area from those of larger scales not related with habitat area. © 2012 Society of Wetland Scientists.

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