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A Study of some factors affecting the natural Regeneration of Pinus brutia Ten. In some locations burned in Lattakia (Qurdaha region)

دراسة بعض العوامل المؤثرة في التجدد الطبيعي للصنوبر البروتي Pinus brutia Ten. في بعض المواقع المحروقة في محافظة اللاذقية (منطقة القرداحة)

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 Publication date 2017
and research's language is العربية
 Created by Shamra Editor




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This research aimed to study the natural regeneration of Pinus brutia in Qurdaha region, and to determine the most important factors affecting the regeneration. 42 circular samples were taken, the area of each sample was 400m2. The following measurements were taken: geographic coordinates of each sample's centre, altitude, aspect, the slope, forest litter thickness, the proportion of gravels, stones and rocks, tree, bushes and herb cover. Forest inventories were achieved using Braun-Blanquet method. Which, the number of sample seedlings, the seedling height, seedling diameter, the seedling age, burning trees and alive trees of Pinus brutia were registered. The results showed a significant negative effect of slope and a significant positive effect of herb cover, where the percentage of data classification by the model was reached 74.4%, while the Nagelkerke R2value was 37%. The negative effect of the slope comes from increasing the risks of soil erosion and the loss in their nutritional elements. In contrast, the positive effect of herbal coverage is the contribution to reducing the risks of summer drought that can be affect the seedlings.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى تحليل العوامل المؤثرة في التجدد الطبيعي لشجرة الصنوبر البروتي في منطقة القرداحة بمحافظة اللاذقية بعد تعرضها للحرائق. تم أخذ 42 عينة دائرية بمساحة 400 متر مربع لكل عينة، وتم قياس عدة عوامل منها الإحداثيات الجغرافية، الارتفاع عن سطح البحر، الميل، سماكة الفرشة الغابوية، نسبة الحصى والحجارة والصخور، التغطية الشجرية والشجيرية والعشبية. أظهرت النتائج تأثيرًا سلبيًا معنويًا للانحدار وتأثيرًا إيجابيًا معنويًا للتغطية العشبية على التجدد الطبيعي للصنوبر البروتي. بلغت نسبة تصنيف البيانات من قبل النموذج 74.4%، وقيمة Nagelkerke R2 كانت 37%. يُعزى التأثير السلبي للانحدار إلى زيادة مخاطر تعرض التربة للانجراف وفقدان العناصر الغذائية، بينما يُعزى التأثير الإيجابي للتغطية العشبية إلى دورها في التخفيف من مخاطر الجفاف الصيفي. توصي الدراسة باستخدام تقنيات النمذجة الرياضية في دراسة التجدد الطبيعي للصنوبر البروتي، والمحافظة على التغطية العشبية في المواقع ذات الانحدار العالي.
Critical review
دراسة نقدية: تعد هذه الدراسة مهمة لفهم العوامل المؤثرة في التجدد الطبيعي للصنوبر البروتي بعد الحرائق، ولكن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل توسيع نطاق العينات لتشمل مناطق أخرى من سوريا لضمان تعميم النتائج. ثانياً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل المناخية الأخرى مثل درجة الحرارة والرطوبة على التجدد الطبيعي. ثالثاً، كان من الممكن استخدام تقنيات تحليلية أكثر تعقيدًا لتحليل البيانات بشكل أعمق. على الرغم من هذه النقاط، فإن الدراسة تقدم إسهامًا مهمًا في مجال إدارة الغابات والمحافظة على التنوع البيولوجي.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو تحليل العوامل المؤثرة في التجدد الطبيعي لشجرة الصنوبر البروتي في منطقة القرداحة بعد تعرضها للحرائق.

  2. ما هي العوامل التي تم قياسها في الدراسة؟

    تم قياس عدة عوامل منها الإحداثيات الجغرافية، الارتفاع عن سطح البحر، الميل، سماكة الفرشة الغابوية، نسبة الحصى والحجارة والصخور، التغطية الشجرية والشجيرية والعشبية.

  3. ما هو التأثير السلبي للانحدار على التجدد الطبيعي للصنوبر البروتي؟

    التأثير السلبي للانحدار يعود إلى زيادة مخاطر تعرض التربة للانجراف وفقدان العناصر الغذائية.

  4. ما هي التوصيات التي قدمتها الدراسة؟

    توصي الدراسة باستخدام تقنيات النمذجة الرياضية في دراسة التجدد الطبيعي للصنوبر البروتي، والمحافظة على التغطية العشبية في المواقع ذات الانحدار العالي.


References used
Catav, SukruSerter; Ismail, Bckar; Busra, SedaAtes; Gokhan, Ergan; Funda, Oymak; Elif, DenziUlker and Cagatay, Tavsanoglu. Germination response of five eastern Mediterranean woody species to smoke solutions derived from various plants. Turk J Bot, 36, 2012, 480-487
Clarke, Peter J.; Kirsten, J. E. Knox; Monica, L. Campbell and Lachlan, M. Copeland. Post-fire recovery of woody plants in the New England Table Bioregion.Cunninghamia, 11 (2), 2009,221-239
Langer, Andreas; Jukka, Miettinen and Florian, Siegert.Land cover change 2002–2005 in Borneo and the role of fire derived from MODIS imagery. Global Change Biology, 13, 2007, 2329–2340
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This study aimed to estimate the height of the Pinus brutia trees in Kafardabeel forested area- Jableh. Eight mathematical forms (Michailoff, Prodan, Petterson, Parabel, Korsun, Logarithmic, Freese, Chapman-Richards) were used. In 2015, the diamet er of 330 trees at breast height (dbh) were measured, and only heights of 165 of them were taken. Measurements were carried out in 15 sample plots all over the study area to cover site variations in altitude, exhibition, gradient and density. Data were split into two parts: 116 tree (70%) were used for model constrction, while the remaining trees 49 tree (30%) were used for model validation. The Results showed that, Parabel had the highest value for the Coefficient of Determination (R²=0.53) and the lowest value of the relative accuracy (mx%) (17.665%). That means it was the the best model to calculate tree height using diameter at breast height. This model can help foresters in forest management planning for study area and similar sites.
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