The Geography of Desert Locust in Sudan; Depicting of Niches using Modis Satellite Images

Mohammed Abd Alla Eltoum, Eltayieb Saeed Ganawa, Mohammed Salih Dafalla, Andrew Townsend Peterson


Recent FAO reports have mentioned several outbreaks of Desert Locusts as putting large economically agricultural areas of the country at risk of environmental damage and socio economic disaster. Civil wars and financial constraints limited ground survey efforts. This study tested the hypothesis that the Desert Locust niches could be understood through serial satellite images. Such an understanding would aid in identifying priority areas for fast control. Data from satellite sources and Desert Locust occurrence data from Plant Protection Directory were integrated in GIS media. Change detection techniques using RS and GIS were applied. Results showed significant correlations were registered between metrological, edaphic, Vegetation and other Eco geographical parameters tested. Moreover predicted Desert Locust densities in the locust niches exceeded the FAO threshold value for ground spraying control. A Desert Locust vegetation damage risk map was produced to help decisionmakers through an early warning system for where and when control operations must take place.


المستخلص:أشارت التقارير الحديثه لمنظمة الفاو الى الانفجار العددى للجراد الصحراوى ممايضع مساحه اقتصادية زراعيه عريضة من البلاد تحت خطر الضرر البيئي والكارثة الاقتصادية الاجتماعيه.الحرب الاهلية و محددات التمويل قللت مجهودات المسح الارضى.هذه الدراسة تختبر فرضية ان مساكن الجراد الصحراوى يمكن فهمها من خلال سلسة من صور الاقمار الصناعية. سيساعد مثل هذا الفهم فى تعريف المناطق ذات الاولوية للمكافحة السريعة. تم دمج البيانات من ادارة وقاية النبات والاقمار الصناعية فى نظام المعلومات الجغرافية، وطبقت طريقة تحديد التغير باستخدام الاستشعار عن بعد.ا ظهرت النتائج ارتباطاً جوهرياً تم تسجيله بين مقاييس المناخ وأفق التربة والنبات ومقاييس ايكلوجية جغرافية اخرى.اضافة الى ذلك، تزيد كثافة الجراد الصحراوى التى تم التنبؤ بها فى مساكن الجراد الصحراوى عن قيمة حد منظمة الفاو للمكافحة بالرش الارضي, بناءًا عليه .تم انتاج خريطة خطر الجراد الصحراوى لتساعد متخذى القرار من خلال نظام انذار مبكر لتحديد اين ومتى تنفذ عمليات المكافحه.




قمر صناعى;جراد صحراوى;مسكن ايكولوجى; الزمن ;Satellite; Desert Locust; Ecological Niche; Risk; Time;

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