https://wikigbayprd.ethz.ch/ 2026-04-15T17:20:36+00:00 https://wikigbayprd.ethz.ch/ https://wikigbayprd.ethz.ch/lib/tpl/dokuwiki/images/favicon.ico text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=a_trade-off_analysis_of_ecosystem_services_and_dynamic_bns_in_the_dutch_wadden_sea&rev=1682083809&do=diff A Trade-off Analysis of Ecosystem Services and Dynamic BNs in the Dutch Wadden Sea, the Netherlands Sonja Wanke, Alex Ziemba, Ghada el Serafy (Deltares) Evaluating interactive effects of global factors with local pressures is one of the major challenges for future management of the Wadden Sea. Global pressures like sea level and temperature rise, and invasive species act on a large scale. For future management strategies it is vital to understand effects of global drivers and their influences … text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=avalanche_protection_in_davos_switzerland&rev=1682083809&do=diff Avalanche protection in Davos, Switzerland Ana Stritih, Peter Bebi, Adrienne Grêt-Regamey Protection from natural hazards such as avalanches is one of the most important ecosystem services provided by mountain forests. Forests decrease the probability of an avalanche release ( text/html 2023-04-21T13:48:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=calculate_distance&rev=1682084890&do=diff Calculate distance to specific cell type This script calculates the distance from each cell to the nearest cell of a specific type (e.g. a road). The script can be used used in the Carbon storage and wood production example, to calculate the distance to roads (node Distance_road) directly in gBay. text/html 2023-04-21T14:04:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=calculate_mean_value_in_neighbouring_cells&rev=1682085845&do=diff Mean of neighbouring cells This script calculates the mean of a continuous variable (e.g. % forest cover) in a specified window around each cell. It runs before the first iteration (i.e. to prepare the input data). The script is used in the Habitat suitability example, to calculate the mean forest cover in a 500m-window around each cell. text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=carbon_storage_and_wood_production&rev=1682083809&do=diff Carbon storage and timber production In order to model carbon sequestration, storage, and wood production in mountain forests, we use two remote sensing products, a land cover classification and a LiDAR-based canopy height model (CHM). The CHM is linked closely related to the total biomass of a forest stand. From one time step to the next, the forest biomass changes due to growth and harvesting, and this change accounts for most of the net carbon sequestration in mountain ecosystems. Forest inv… text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=case_studies&rev=1682083809&do=diff Case studies Avalanche protection in Davos, Switzerland Land-use scenarios in Sierra Nevada Collaborative modelling of ecosystem services in Doñana The impact of aquatic ecosystems provisioning services on tourism in the Danube Delta A Trade-off Analysis of Ecosystem Services and Dynamic BNs in the Dutch Wadden Sea Whale watching in the Pelagos text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=collaborative_modelling_of_ecosystem_services_in_donana&rev=1682083809&do=diff Collaborative modelling of ecosystem services in Doñana Pablo F. Méndez, Luis Santamaría (EBD-CSIC) The overall goal is of the modelling exercise is to better understand and predict the influence of multiple environmental and management/policy factors over the waterbird community of the protected marsh of the Doñana PA. The main interests are twofold. First, the interest lies in the ability of BNs to capture the perceptions and beliefs of different stakeholders (e.g., decision-makers vs expert… text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=dynamic_bns&rev=1682083809&do=diff Iterative BNs Bayesian Networks usually represent a static state of the studied system, and feedback loops cannot be incorporated. To take into account changes over time, including feedbacks, we can use dynamic BNs, using the so-called “time-slicing” approach. In practice, this means that each time step is represented by a run of the network, where the text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=example_scripts&rev=1682083809&do=diff Example scripts for intermediate processing Calculate mean value in neighbouring cells Calculate distance Calculate fuzzy area text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=examples&rev=1682083809&do=diff Example Bayesian Networks In the following, we present three examples of Bayesian Networks for modelling ecosystem services. The networks and some associated data can be downloaded and used to get familiar with Netica and gBay. They are based on real ecosystems in the Swiss Alps, but are simplified, and need to be adapted with own data and/or knowledge in order to apply them elsewhere. text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=habitat_suitability&rev=1682083809&do=diff Habitat suitability The model describes the habitat suitability for a grouse species in the Alps. The grouse mainly live in montane, not-too-dense conifer forests (with 40-70% tree cover), where there is enough light for understory vegetation such as blueberries. Large forest areas are more suitable than small patches, so the model takes into account nearby pixels within a 500 m distance (calculated within gBay using a script to text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=how_to_develop_a_bn&rev=1682083809&do=diff Developing a Bayesian Network A Bayesian Network is a directed, acyclic graph with an underlying joint probability distribution. It therefore consists of three parts: * A set of nodes representing variables, each with a set of mutually exclusive (discrete or continuous) states. text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=how_to_use_gbay&rev=1682083809&do=diff 1. Upload a BN In the first step, the BN we want to run should be uploaded in the .dne or .net format (as created in Netica or another BN software). This is done by using “choose file” and selecting the network file, or dragging and dropping the network file into the application. Then, we click “Proceed”. text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=intermediate_processing_technical_information&rev=1682083809&do=diff The python file uploaded for the intermidiate processing of gBay MUST implement a function named 'process' that receives as an input information about the geographical region being used, the input nodes selected in the application, and the current iteration number. text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=intermediate_processing&rev=1682083809&do=diff Accounting for spatial interactions Spatial interactions, such as neighbourhood effects, are often important in socio-ecological systems. In gBay, we can account for spatial interactions using the Intermediate processing module. Here, we can upload text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=iterative_bns&rev=1682083809&do=diff Iterative BNs Bayesian Networks usually represent a static state of the studied system, and feedback loops cannot be incorporated. To take into account changes over time, including feedbacks, we can use dynamic BNs, using the so-called “time-slicing” approach. gBay uses a simplified version of this approach, where each time step is represented by a run of the network, where the text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=recreation&rev=1682083809&do=diff Recreation The value of recreation in a landscape depends on its natural potential (i.e., the attractiveness of the landscape), as well as the its accessibility and the overall level of demand (e.g. the number of visitors in the region). In this network, we combine three factors that were defined by local stakeholders in the mountain region as important for landscape attractiveness: the topographic variability (heterogeneous terrain with prominent peaks), remoteness, and probability of observin… text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=start&rev=1682083809&do=diff gBay Bayesian Networks with geo-data Bayesian networks (BNs) are a powerful tool to represent complex socio-ecological systems, as they can take into account both qualitative and quantitative data, while the associated uncertainties are explicitly shown and propagated through the network. Furthermore, relationships between variables in the BN are represented graphically, creating a transparent model structure that can facilitate communication with stakeholders. Because of these advantages, BNs… text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=the_impact_of_aquatic_ecosystems_provisioning_services_on_tourism_in_the_danube_delta&rev=1682083809&do=diff The impact of aquatic ecosystems provisioning services on tourism in the Danube Delta Constantin Cazacu, Cristian Mihai Adamescu (UB) The Danube Delta is the second largest delta in Europe, after that of the Volga River and one of the best preserved in the world. The geomorphology of the area is formed by the dynamics of the river arms, low altitudes and the presence of the sea, creating a complex landscape of freshwater ecosystems (canals, shallow lakes, and wetlands), flood plains, alluvial … text/html 2023-04-21T13:30:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://wikigbayprd.ethz.ch/doku.php?id=whale_watching_in_the_pelagos&rev=1682083809&do=diff Whale watching (Pelagos) Kevin Flückiger, Ana Stritih (ETH Zürich) The Pelagos Sanctuary is a marine protected area (MPA) in the Mediterranean Sea aimed to protect all marine mammals. Due to a combination of climatic, oceanographic and physiographic factors, the area has good conditions for the feeding and breeding habitat of several whale and dolphin species (Notarbartolo di Sciara and Reeves 2006). At the same time, it is surrounded by well-developed regions with high economic activity. For …