janoska - methods for description of distribution of species obtained by quadrant mapping
DESCRIPTION
Presentation from Third InDOG Doctoral Conference in Olomouc, Czech Republic. 13. - 16. October 2014TRANSCRIPT
www.geoinformatics.upol.cz
Methods for description of distribution of species obtained by quadrant mapping
Zbyněk Janoška
www.geoinformatics.upol.cz
Quadrant mapping
Kartierung der Flora Mitteleuropas (KFME), Niklfeld, 1971 Environmental mapping (biological) CZ, SK, A, RO Base level:
10 minutes longitude 6 minutes latitude
www.geoinformatics.upol.cz
Data
Lepidoptera – daily butterflies White Carpathians area (715 km2) Data collection: 2004-05; 124 species; 20 000 records Incidence of species – T/F values Locations checked multiple times (5-20) Bias in data collection (towards accesible and enviromentaly rich locations)
www.geoinformatics.upol.cz
Data
www.geoinformatics.upol.cz
Data
www.geoinformatics.upol.cz
Data
www.geoinformatics.upol.cz
Data
www.geoinformatics.upol.cz
Data
www.geoinformatics.upol.cz
Aim of study
Propose descriptors of distribution Clustering / regularity / randomness Density Dominance
Patches – continuously inhabited areas (Rook neighborhood)
www.geoinformatics.upol.cz
Descriptors of shape
Moran's Index (Moran, 1950) Bias – not suitable
www.geoinformatics.upol.cz
Dominance
DI1 = Size of largest patch / Size of second largest patch DI2 = Size of largest patch / Size of inhabited area
www.geoinformatics.upol.cz
Dominance
www.geoinformatics.upol.cz
Density
Typicaly: Occupied area / Total area In this case: total area same for all species
Modification: Occupied area / Homerange Homerange = Minimal Convex Polygon
www.geoinformatics.upol.cz
Coverage
Percentage of patches needed to cover X % of area
Number of patches
(Self-explanatory)
www.geoinformatics.upol.cz
Results
Descriptors partially correlated Suitable for comparisson of pairs of distribution Given data quality, should be used with caution All calculations can be automatized → data mining tool
www.geoinformatics.upol.cz
Further analysis
Transformation, standardization, outlier detection Dimension reduction (PCA, Correspondence Analysis) Clustering of data
www.geoinformatics.upol.cz
Literature
MORAN, P. A. P. (1950). Notes on Continuous Stochastic Phenomena. Biometrika 37(1) 17-23. NIKLFELD, H. (1971). Bericht über die Kartierung der Flora Mitteleuropas. Taxon 20(4) 545-571