1,720,967 research outputs found
Viticulture and climate change: a socio-ecological perspective
No full textI paesaggi viticoli sono il risultato di secoli di evoluzione tra uomo e natura, in cui i viticoltori hanno sviluppato le conoscenze di uve, ambiente e tecniche per produrre i vini migliori. Oggigiorno, questo equilibrio è minacciato dai cambiamenti climatici, che pongono sfide significative in molte regioni viticole nel mondo. Gli impatti dei cambiamenti climatici sono stati studiati principalmente in termini biofisici, spesso tralasciando le relazioni con le componenti umane presenti nei vigneti. Questa tesi esplora i benefici di un approccio socio-ecologico per lo studio degli impatti dei cambiamenti climatici sulla viticoltura. L’elaborato è strutturato in una collezione di articoli che analizzano le molteplici interrelazioni tra le componenti umane e biofisiche della viticoltura. Il primo capitolo analizza la letteratura sui paesaggi viticoli e i cambiamenti climatici, identificando se e come in questo campo sia mai stato adottato un approccio socio-ecologico. Il secondo capitolo è incentrato sulla creazione di dati geospaziali adatti all’analisi delle regioni viticole europee che producono vini di qualità nel contesto dei cambiamenti climatici. Il terzo capitolo presenta la prima analisi di vulnerabilità della viticoltura ai cambiamenti climatici a scala europea, che definisce quanto le aree viticole di qualità saranno messe in pericolo dagli attuali trend climatici. I risultati mostrano come l’adozione di un approccio socio-ecologico faciliti la conoscenza dei meccanismi che regolano il funzionamento delle aree viticole, suggerendo possibili strategie per accrescere la resilienza di queste regioni considerando il loro specifico contesto
A Network Approach to Green Infrastructure: How to Enhance Ecosystem Services Provision?
Full text linkLandscape fragmentation is increasingly undermining the capacity of ecosystems to provide services and benefits to humans. The development of a green infrastructure network can enhance the provision of ecosystem services connecting ecosystem features. We review and explore the concepts, methodologies, and applications that allow to analyse connectivity of green infrastructure networks and the role of spatial connectivity for supporting and maintaining ecosystem services. Together with connectivity, the quality, quantity, diversity, redundancy, and distances of ecosystem elements result to be important characteristics to support the provision of services. We report how spatial and connectivity-based methodologies (for example, network indices and spatial pattern analysis) can support characterisation and prioritization of green infrastructure networks for crucial interventions, both for preserving and restoring connection elements
Upscaling ecosystem service maps to administrative levels: beyond scale mismatches
Full text linkAs Ecosystem Services (ES) are the products of complex socio–ecological systems, their mapping requires a deep understanding of the spatial relationships and pattern that underpin ES provision. Upscaling ES maps is often carried out to avoid mismatches between the scale of ES assessment and that of their level of management. However, so far only a few efforts have been made to quantify how information loss occurs as data are aggregated to coarser scales. In the present study this was analyzed for three distinct case studies in the eastern Alps by comparing ES maps of outdoor recreation at the municipality level and at finer scales, i.e. high-resolution grids. Specifically, we adopt an innovative and flexible methodology based on Exploratory Spatial Data Analysis (ESDA), to disentangle the problem of the scale from the perspective of different levels of jurisdiction, by assessing in an iterative process how ES patterns change when upscaling high-resolution maps. Furthermore, we assess the sensitivity to the modifiable areal unit problem (MAUP) by calculating global statistics over three grid displacements. Our results demonstrate that spatial clusters tend to disappear when their extent becomes smaller than the features to which values are upscaled, leading to substantial information loss. Moreover, cross-comparison among grids and the municipality level highlights local anomalies that global spatial autocorrelation indicators fail to detect, revealing hidden clusters and inconsistencies among multiple scales. We conclude that, whenever ES maps are aggregated to a coarser scale, our methodology represents a suitable and flexible approach to explore clustering trends, shape and position of upscaling units, through graphs and maps showing spatial autocorrelation statistics. This can be crucial to finding the best compromise among scale mismatches, information loss and statistical bias that can directly affect the targeted ES mapping
A geospatial inventory of regulatory information for wine protected designations of origin in Europe
Full text linkThe Wine Protected Designation of Origin (PDO) label is a European quality scheme that protects high quality wines by linking them to legally defined geographic areas and a set of specific production practices. Because of the tight relation between PDO wines and the specifications defined in the official regulatory documents, these products are highly susceptible to changes in climatic, environmental, or socioeconomic conditions. However, the content of these regulatory documents has never been systematically analysed and summarized in a single dataset. Here, we present the first geospatial inventory that organizes regulatory information about the 1177 wine PDO in Europe based on the documents from the official EU geographical indication register. It includes essential legal information that defines the wine PDO such as the geographic boundaries, authorized cultivars and maximum yields. This inventory opens new possibilities for researchers to accurately assess, compare and map the regulatory information in each wine region at an unprecedented level of detail, supporting decision makers in developing adaptation strategies for the preservation of PDO wine regions
Climate resilience of European wine regions
Full text linkOver centuries, European vintners have developed a profound knowledge about grapes, environment, and techniques that yield the most distinguishable wines. In many regions, this knowledge is reflected in the system of wine geographical indications (GI), but climate change is challenging this historical union. Here, we present a climate change vulnerability assessment of 1085 wine GIs across Europe and propose climate-resilient development pathways using an ensemble of biophysical and socioeconomic indicators. Results indicate that wine regions in Southern Europe are among the most vulnerable, with high levels also found in Eastern Europe. Vulnerability is influenced by the rigidity of the GI system, which restricts grape variety diversity and thus contributes to an increased sensitivity to climate change. Contextual deficiencies, such as limited socioeconomic resources, may further contribute to increased vulnerability. Building a climate-resilient wine sector will require rethinking the GI system by allowing innovation to compensate for the negative effects of climate change
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Mapping a Green Infrastructure Network: a framework for spatial connectivity applied in Northern Italy
No full textGlobal environmental changes, including landscape fragmentation, are threatening the integrity of ecosystems and reducing their capacity to deliver ecosystem services. Spatial configuration of a green network supports ecological functions and services, that depend on living organisms and material movements across the landscape. It is important to study the structure of green infrastructure networks and to develop robust methodologies that can inform future planning. In this paper we describe a framework for connectivity analysis and enhancement within the green infrastructure networks. We review and combine methods to map and analyse the current spatial network configuration of green elements, in order to identify the key nodes and links that can maintain connectivity and consequently support the benefits provided across the landscape. The study explores the creation of network scenarios and the improvement or reduction of connectivity by adding, preserving, or removing corridors and core areas. Methods include morphological spatial pattern analysis, landscape connectivity metrics and graph theory elements. The analysis has been applied in the Northern Italian Plain, considering green riparian zones and the protected areas as elements of the network. The results show that this method can be used to analyse the status of green infrastructure networks and to identify the main needs for maintaining and improving network connectivity. This is important in the current context of change, as it may support decision-makers in developing tailored adaptation strategies that exploit nature-based solutions to reduce the risks caused by the major drivers of change
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