AFFINITY BETWEEN CLIMATIC VARIABLES (TEMPERATURE AND MOISTURE) AND PRESENCE OF SOME SAHARA-SINDIAN PLANT SPECIES IN EASTERN MARGIN OF CASPIAN REGION

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BARANI H.; OWNEGH M.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2007 | Volume:14 | Issue:SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES) Page(s): 110-123

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Title

AFFINITY BETWEEN CLIMATIC VARIABLES (TEMPERATURE AND MOISTURE) AND PRESENCE OF SOME SAHARA-SINDIAN PLANT SPECIES IN EASTERN MARGIN OF CASPIAN REGION

Author(s)

BARANI H. | OWNEGH M. | Issue Writer Certificate

Keywords

PLANT GEOGRAPHYQ4

PALEOTROPICSQ3

SUDANO-ZAMHEZIANQ3

SAHARN- SINDIANQ3

SUMMER RAINRAFULLQ3

Abstract

In Iran, the northern boundary of PALEOTROPICS realm is the latitude of approximately 28 N from a phytogeographical point of view. But a few exclusive species of this realm (such as Heteropogon contortus) have been reported from east and north east of Golestan province in north of Iran that is located about 1000km further to the north. Also some other paleotropic species (such as Tetrapogon villosus) were found in this study area. Ten climatic variables were chosen in two categories (moisture and temperature) and their averages were calculated using five weather stations for a l6-year period (1985-2000) in order to analysis of climatic variables affecting on the distribution of these species. Three weather stations were chosen from each phytogeographical zone of Iran (nine stations in total) to calculate the average of the selected variables. Due to different scales of the variables the dita were made dimensionless. The climatic similarities were calculated using Euclidian distance among the study area and the cities that were selected from other zones. The corresponding dendrograms were produced by average linkage method. The results indicate that the climatic similarity between the study area and Sahra-Sindi and Caspian zones are respectively the highest (63 percent) and lowest (25 percent). So the presence of tropical species is expectable in spite of the long distance between the study area and Sahara-Sindi zone. It seems these species dispersionally are relic and remain of Paleogene extending of tropical plant communities that occupied most area of northern hemisphere. These vegetations are reduced in Neogene's and quaternary periods. It recommends that the study area should be receiving more attention for conservation as a rare and limited area in such a high latitude locations.

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APA: Copy

BARANI, H., & OWNEGH, M.. (2007). AFFINITY BETWEEN CLIMATIC VARIABLES (TEMPERATURE AND MOISTURE) AND PRESENCE OF SOME SAHARA-SINDIAN PLANT SPECIES IN EASTERN MARGIN OF CASPIAN REGION. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 14(SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES)), 110-123. SID. https://sid.ir/paper/8970/en

Vancouver: Copy

BARANI H., OWNEGH M.. AFFINITY BETWEEN CLIMATIC VARIABLES (TEMPERATURE AND MOISTURE) AND PRESENCE OF SOME SAHARA-SINDIAN PLANT SPECIES IN EASTERN MARGIN OF CASPIAN REGION. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2007;14(SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES)):110-123. Available from: https://sid.ir/paper/8970/en

IEEE: Copy

H. BARANI, and M. OWNEGH, “AFFINITY BETWEEN CLIMATIC VARIABLES (TEMPERATURE AND MOISTURE) AND PRESENCE OF SOME SAHARA-SINDIAN PLANT SPECIES IN EASTERN MARGIN OF CASPIAN REGION,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 14, no. SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES), pp. 110–123, 2007, [Online]. Available: https://sid.ir/paper/8970/en

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