Elaboration of habitat suitability model for Corncrake

The elaboration of habitat suitability model for the Corncrake, combining habitat data with the data of Corncrake occurrence in Dviete floodplain nature park, takes place within the LIFE+ project. Modeling is almost finished at the moment. Two different methods are used - Ecological Niche Factor Analysis (ENFA) and the principles of Decision Support System (DSS). After comparison of both models it was concluded, that the ENFA model is more accurate, therefore it is recommended to use this model for identification and management of Corncrake habitats in the future.

The DSS model is elaborated in ArcGIS, using map layers, containing landscape elements, relevant to the species. These elements and importance of their impact were defined, using a scientific literature and an opinion of Corncrake experts.

Elaboration of the ENFA model is mainly based on the maps of vegetation height and hyperspectral data, prepared by the Institute for Environmental Solutions for the area of Dviete floodplain nature park. Basing on the census data of Corncrakes, obtained during field counts, the ENFA were made, using the program Biomapper, specially created for identification of species habitats. As a result a map, reflecting suitability of habitats for the Corncrake in Dviete floodplain nature park, was prepared. It is planned, that the model, elaborated within the project, could be used for identification and management planning of Corncrake habitats also in other areas.

Rūta Abaja

08.04.2013.

Maps of Corncrake habitats. DSS model to the left, ENFA model to the right. The map of ENFA model is more detailed. Area of Dviete floodplain nature park near Skuķu lake is shown in the maps.