Database Report

Hyrcanian Forest Vegetation Database

Hamid Gholizadeh & Alireza Naqinezhad

GIVD Database ID: AS-IR-006	Last update: 2019-10-28
Hyrcanian Forest Vegetation Database	Web address:
Database manager(s): Hamid Gholizadeh (gholizadeh.hamid@gmail.com); Alireza Naqinezhad (a.naqinezhad@umz.ac.ir)
Owner: Alireza Naqinezhad & Hamid Gholizadeh
Scope: Hyrcanian forest in north of Iran
Abstract: Although many vegetation and floristic studies were carried out in the Hyrcanian forests, a comprehensive phytosociological analysis is still missing. For this purpose, we created a database using the TURBOVEG software
Availability: according to a specific agreement	Online upload: no	Online search: no
Database format(s): TURBOVEG, Excel	Export format(s): TURBOVEG, Excel, CSV file
Plot type(s): normal plots	Plot-size range (m²): 20 to 400
Non-overlapping plots: 1597	Estimate of existing plots: 2200	Completeness: 73%	Status: ongoing capture
Total no. of plot observations: 1597	Number of sources (biblioreferences, data collectors): 17	Valid taxa: 802
Countries (%): IR: 100
Formations: Forest: 100% = Terrestrial: 100%
Guilds: all vascular plants: 100%
Plot size categories (%): 10-100 m2: 1.1%; 100-1000 m2: 98.9%;
Environmental data (%): altitude: 92; slope aspect: 97; slope inclination: 97; microrelief: 31; surface cover other than plants (open soil, litter, bare rock etc.): 40; other soil attributes: 55; soil pH: 60; land use categories: 0; soil depth: 0
Performance measure(s): presence/absence only: 0%; cover: 100%; number of individuals: 0%; measurements like diameter or height of trees: 0%; biomass: 0%; other: 0%
Geographic localisation: GPS coordinates (precision 25 m or less): 52%; point coordinates less precise than GPS, up to 1 km: 0%; small grid (not coarser than 10 km): 48%; political units or only on a coarser scale ( above 10 km): 0%
Sampling periods: before 1920: 0%; 1920-1929: 0%; 1930-1939: 0%; 1940-1949: 0%; 1950-1959: 1.2%; 1960-1969: 1%; 1970-1979: 13.8%; 1980-1989: 9.3%; 1990-1999: 5.6%; 2000-2009: 31.8%; 2010-2019: 37.3%; unknown: 0%
Information as of 2025-07-02; further details and future updates available from http://www.givd.info/ID/AS-IR-006

Hamid Gholizadeh* (gholizadeh.hamid@gmail.com)
Department of Biology, University of Mazandaran, IRAN
Alireza Naqinezhad (a.naqinezhad@umz.ac.ir)
Department of Biology, University of Mazandaran, IRAN
* corresponding author