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V. Etemad & N. Avani 2010. Investigation on species diversity by inventory in Caspian Forests
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Investigation on species diversity by inventory in Caspian Forests
(Case study: Gorazbon District- Noshahr, Iran)
Vahid Etemad & Nazi Avani
Forestry Group, Faculty of Natural resources, Tehran University, Iran
Abstract
Species diversity is an index for forest ecosystems and is an important matter in plant cover
ecology. In this study after %100 inventory in Gorazbon district (Kheyrud Forest) and
establishment of forest type, biodiversity indexes were applied. The results illustrated that the
highest level of the plant species richness, diversity and evenness indexes belonged to Carpinus-
Alnus type with Acer sp. and the least level of the plant species richness belonged to Fagus and
Fagus-Carpinus type. The least level of diversity and evenness belonged to Fagus and
Carpinus-Quercus. The results show that sampling is suitable for biodiversity evaluation too.
Keywords: Kheyrud Forest, diversity, species richness and evenness, Noshahr, Iran
Introduction
Hyrcanus forests with special genetic diversity as number of wooden species and plant
communities is very rich and have different forest communities (Asadollahi, 2000). The studies
of biodiversity indicators in Hyrcanus forests for investigation on species diversity and exact
recognize and function of management plan is very necessary.
Moderate regions forests have the main role in biodiversity conservation. Wooden species are
the major matters in the forest ecosystems that have most traces on the other beings life, as
decrease of species diversity can lead weakness other beings.
In biodiversity study, many experts work on it and show many formula, such as Sympson
biodiversity indicator in 1949, Manhinic richness indicator in 1964.
The purpose of this study is determination of species diversity in North forests of Iran with
100% inventory as sustainable management of stands under utilization. The results can
investigate status of wooden species as number and abundance.
Eshagh Nimvari and et al., (2006), for studying of biodiversity in Fagetum community,
Carpino-fagetum and Querco-carpinetum in Namkhane and Gorazbon district (Noshahr),
richness, species diversity and Evenness indicators were measured. The results show that the
most richness, diversity and Evenness were in Querco-carpinetum and the least was in Fagetum
community. Species diversity in mixed communities was more than pure communities.
Hauk (2005), richness and species diversity were studied in Austrian forests and the results
showed that richness and species diversity in the whole broadleaf communities except Fagetum
was more than conifers. Quercus communities had the most richness , Picea and Fagus
communities had the least.
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.