Distribution and importance of some endemic Astragalus L. species in semi-arid environmentally sensitive areas: a case study from northern Turkey

Background: The objective of this study was to determine the distribution some endemic species genus Astragalus L. (Astragalus anthylloides Lam., lycius Boiss. and xylobasis var. angustus (Freyn & Sint.) Freyn Bornm.) species, interaction between soil, climatic characteristics desertification risk which affect these in semi-arid environment Çankırı, northwest Turkey. During vegetation period 2017, soil plant samples were collected from 180 points. Desertification (DR) environmentally sensitive area index (ESAI) calculated for each sampling point using indicator system Mediterranean Europe (DIS4ME). Results: According DIS4ME forest areas, DR values A. lowest with 0.49 (no risk) highest 3.73 (moderate risk), an average 2.20 field (low risk). For grassland, ranged a low 5.01 high 5.42. ESAI 1.34 1.50 areas where distributed, they 1.33 1.47 grassland areas. results analysis changes according land use types distribution. Conclusion: When relationships all three species’ are evaluated together, emerged as best determining status.