نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده زیست شناسی و مرکز قطب تبارزایی موجودات زنده، دانشکدگان علوم، دانشگاه تهران،تهران، ایران
2 دانشکده زیست شناسی و مرکز قطب تبارزایی موجودات زنده، دانشکدگان علوم، دانشگاه تهران،تهران، ایران.
3 گروه باغبانی و حفاظت نباتات، دانشکده کشاورزی، دانشگاه صنعتی شاهرود، شاهرود، ایران.
4 موزه جانورشناسی استاد جلال افشار ، دانشکدگان کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This study investigates the biodiversity and abundance of short-horned grasshoppers (Acrididae) in the Jaghatai mountain range,. Sampling was conducted during summer and autumn over two consecutive years (2021-2022) on the northern and southern slopes. On each slope, two sampling sites were selected at altitudes of 900 m and 1500 m. Sampling was carried out using insect nets along two transects (one transect in the northern slope and one transect in the southern slope) from the four designated stations. Specimens were mounted using standard entomological technique, and identified to species level using valid taxonomic keys. Biodiversity was assessed using the Shannon-Wiener diversity index Margalef richness index , and Pielou evenness index . Statistical analyses were performed using SPSS software. A total of 19 species of short-horned grasshoppers were collected . The Shannon-Wiener diversity index showed no significant difference between the two slopes (p-value = 0.2). Comparing different altitudes, the highest Shannon-Wiener diversity was observed at 1500 m altitude in both northern and southern slopes. Margalef richness index was higher in the southern slope (2.66) compared to the northern slope (2.21), while Pielou evenness index was higher in the northern slope (0.98) than in the southern slope (0.8). Regarding altitudinal comparison, the highest species richness was observed at 1500 m altitude (1.83), and the highest evenness was observed at 900 m altitude in the northern slope (0.9) and at 1500 m altitude in the southern slope (0.8). These findings demonstrate that slope aspect and altitude significantly influence the structure of grasshopper communities.
کلیدواژهها [English]
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