Landscapes Forest and Global Change - ESA - Escola Superior ...

S. Gholami et al. 2010. Spatial pattern of soil macrofauna biodiversity in wildlife refugee of Karkhe in Southwestern Iran
49
used to classify the spatial dependence of soil properties. In this study we used similar criteria to
those reported by Sun et al., (2003). The variable is considered to have a strong spatial
dependence if the ratio is less than 25%, and has a moderate spatial dependence if the ratio is
between 25% and 75%; otherwise, the variable has a weak spatial dependence.
Soil macrofauna abundance and diversity were moderately spatially dependent (Table 2). The
range of influence is considered as the distance beyond which observations are not spatially
dependent. This distance ranged from 1326 m for soil macrofauna diversity to 1724 m for
abundance (Table 2).
The maps obtained by kriging for soil macrofauna abundance and diversity are shown in Fig. 2.
Table 1. Mean, standard deviation (S.D.), coefficient of variation (CV), minimum and maximum values
of for soil macrofauna abundance and diversity
Index mean S. D C.V (%) minimum maximum
Abundance (indiv. m -2 ) 43.1 73.9 171 0 480
Shannon (H’) 0.55 0.51 92 0 1.9
Table2. Variogram model parameters for soil macrofauna abundance and diversity
Index Model Sill Nugget Nugget/ Sill (%) Range(m)
abundance spherical 1.13 0.59 52 1724
Shannon (H’) spherical 0.27 0.153 55 1326
(A)
(B)
Fig.1. Variograms of (A) Log transformed data for soil macrofauna abundance and (B) soil macrofauna
diversity
Forest Landscapes and Global Change-New Frontiers in Management, Conservation and Restoration. Proceedings of the IUFRO Landscape Ecology
Working Group International Conference, September 21-27, 2010, Bragança, Portugal. J.C. Azevedo, M. Feliciano, J. Castro & M.A. Pinto (eds.)
2010, Instituto Politécnico de Bragança, Bragança, Portugal.