Geographic distribution of fruit trees diversity surveyed during FAO project

RAIMONDA SEVO1,  BELUL GIXHARI1,FRIDA ÇARKA,VALBONA HOBDARI1, ATHINA GJYLI 2

1Genetic Resources Centre, Agricultural University of Tirana, Tirana, Albania  

2Agricultural Transferring Technology Center  of  Vlore, Albania

 

Coresponding authors: Raimonda Sevo. raimondasevo@gmail.com

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Abstract

Study for geographic distribution of 172 geo-observations representing new accessions collected from four districts of Albania (Dibra, Korca, Gjirokastra, Shkodra) during FAO Project (2013-2014), including 9 species, was carried out, using grids of 5 x 5 km to assess the number of individuals per species and per district, the area of occupancy and diversity indices. Geospatial analysis detects areas of high alpha significant diversity. Combination of diversity indices as Species Richness, Simpson index (1–D), Shannon index, Evenness, Brillouin index, Equitability, and Fisher-alpha found the areas of Gjirokastra and Shkodra were richer in fruit trees diversity than other observed areas. Surveyed diversity of Gjirokastra and Shkodra comparable between them, was found comparable with diversity surveyed in Dibra and Korca areas, but the diversity among Dibra and Korca areas was non-comparable. Cluster analysis based on Euclidian distance(pair group method) generate a dendrogram of three clusters. Higher similarity (0.74) and significant positive correlation (r = 0.72) between diversity of Korca and Shkodra areas found. Higher species evenness > 0.78, and equitability > 87, were found in surveyed areas of Dibra and Gjirokastra Counties. These results suggest the presence of more relative stable ecosystems and more ecological niches available in Dibra and Gjirokastra areas. The diversity of these two areas could be used for the assessment of the current status of conservation of fruit tree genetic resources and for the prioritization of potential ecological areas suitable for their in situ conservation.

Keywords:Diversity indices, geographic distribution, species evenness.

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