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

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S. Gholami et al. 2010. Spatial pattern of soil macrofauna biodiversity in wildlife refugee of Karkhe in Southwestern Iran<br />

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4. Discussion<br />

Fig.2. Distribution of soil macrofauna diversity: A – Abundance, B –Shannon H index<br />

This study showed that soil macrofauna abundance <strong>and</strong> diversity were spatially autocorrelated<br />

within the range of 1519 <strong>and</strong> 1937 meters. In line with our result Gongalski et.al., (2008)<br />

reported the spatial autocorrelation for soil macrofauna abundance <strong>and</strong> diversity in<br />

Mediteranean forest in Russia.<br />

Typically these structures constitute one source of the nugget variance of the variograms (Rossi,<br />

2003). However, the variograms reported here featured a somewhat high ratio of nugget<br />

variance to sill (Table 2). This result showed that there was the small-scale variability <strong>and</strong><br />

important proportion of unexplained variance (Rossi, 2003, Gongalski et.al., 2008,).<br />

Spatial distribution of soil macrofauna at large scales may be influenced by factors like<br />

gradients in soil organic matter (quantity <strong>and</strong> or quality), texture <strong>and</strong> vegetation cover structure<br />

(Ettema & Wardle 2002). These factors together with intrinsic population processes constitute<br />

proximate controlling factors of population structure (Rossi, 2003).<br />

References<br />

Barrios, E. 2007. Soil biota, ecosystem services <strong>and</strong> l<strong>and</strong> productivity. Ecological Economics,<br />

24(2):269-285.<br />

Coulson, R.N., McFadden, B.A., Pully, P.A., Lovelady, C.N., Fitzgerald, J.W., Jack, S.B., 1999.<br />

Heterogeneity of forest l<strong>and</strong>scape <strong>and</strong> the distribution <strong>and</strong> abundance of southern pine<br />

beetle. <strong>Forest</strong> Ecology <strong>and</strong> Management, 114: 471-485.<br />

Ettema, C. H., Wardle, D. A. 2002. Spatial soil ecology. Trends in Ecology <strong>and</strong> Evolution 17,<br />

177–183.<br />

<strong>Forest</strong> <strong>L<strong>and</strong>scapes</strong> <strong>and</strong> <strong>Global</strong> <strong>Change</strong>-New Frontiers in Management, Conservation <strong>and</strong> Restoration. Proceedings of the IUFRO L<strong>and</strong>scape Ecology<br />

Working Group International Conference, September 21-27, 2010, Bragança, Portugal. J.C. Azevedo, M. Feliciano, J. Castro & M.A. Pinto (eds.)<br />

2010, Instituto Politécnico de Bragança, Bragança, Portugal.

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