Herbaceous Vegetation Cover Analysis of Selected Sites in Jordan (Research Note)

Said A. Damhoureyeh

Abstract


Five selected sites representing two biogeographical regions and five different vegetation types in Jordan were studied. Herbaceous vegetation were surveyed using the line transect. A total of 50 quadrat units (1m sq. each) per site were sampled along a ten fifty-meter-line transects with 5 quadrat units per line. Herbaceous vegetation total cover and maximum plant height, total number of individuals of each species and number of species were recorded. The analysis of the surveyed sites included species composition, species frequencies, abundances and Importance Value (IV). Analysis revealed that three to four families constituted more than 50% of the relative abundance of the total families in each site. Asteraceae was the most abundant family in all sites and had the highest IV. Other families that showed high abundance and IV values include, Leguminosae, Labiatae and Gramineae. Highest coverage, height, number of species, number of families and number of individuals have been recorded in Alouk and Na’ur areas, representing the deciduous oak and non-forest Mediterranean vegetation types, respectively. Dana and Adaseyeh had the lowest values. Only few species in each site contributed a major percent of the total abundance. Identifying the species with the highest IV values in each family at each of the five sites showed that these herbaceous vegetation types exhibit diverse array of species

Keywords


Herbaceous vegetation cover, Jordan, Biogeographical regions

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