research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Abundance, occurrence, seasonal changes and species composition of Macroinvertebrates in the restored Iraqi southern marshes

Author: A.H. Ali; N.M. Aziz and H.A. Hamza
Journal: Marsh Bulletin مجلة الاهوار ISSN: 18169848 Year: 2007 Volume: 2 Issue: 1 Pages: 80-95
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

78 species of macroinvertebrate were recorded in all monitored marshes comprised 17 snails, 40 insects, 4 of each shrimp and Annelid, 3 of each mussel, spider and crab, 2 Isopods, and 1 of amphipod and 1 Cirriped. Density of macroinvertebrates was higher on aquatic plants in all groups except stations Saddah, Burkah (both in East Hammar). the bottom substratum organisms were higher. Maximum species were recorded in Suq Shuyukh52 species while minimum values were recorded in East Hammar 39 species.Maximum density was recorded in East Hammar for snail 11.32-15.6 ind. /m2 on plant and 29.3-27ind/m2 on bottom substrate, while minimum density recorded in Um Alnaaj (Huwayzah) 2.2 ind. /m2. Maximum value for insect in Burkah bottom 6.3ind/m2 and minimum value in Suq Shuyukh bottom 0.33 ind. /m2. Maximum value for shrimp was recorded on plant of Um Alnaaj 15.17 ind. /m2 and minimum value on plant in Amia 6.9 ind. /m2. Seasonal changes in macroinvertebrates numbers were recognized ,that maximum numbers were recorded for all groups in spring, while minimum values were recorded in summer.Snail had higher values of diversity in all marshes; moreover East Hammar was higher than that in other marshes in biological indices. Evenness was found to be 0.71 for shrimp in Huwayzah in comparison to Suq Shuyukh 0.45 and East Hammar 0.13. Higher diversity of shrimp in Suq Shuyukh 0.73, while insect had a comparable in seasonal values and low in all ecological indices between Huwayzah and Suq Shuyukh.


Article
A Study of Recent Native Sulfur Deposits in South Eastern Basrah area -
دراسة الترسبات الحديثة للكبريت الخالص جنوب شرقي البصرة جنوبي العراق

Author: Basim H. Soltan باسم حميد سلطان
Journal: Journal of Basrah Researches (Sciences) مجلة ابحاث البصرة ( العلميات) ISSN: 18172695 Year: 2007 Volume: 33 Issue: 2A Pages: 54-65
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

Nine rock samples were collected from yellow coloured fragments scattered in two neighbor sites in Abul-Khasib area. Field study and sampling were carried out during Feb./2005-Jan./2006. All samples were chemically analyzed by SEM technique. This analysis emphasizes that the sulfur content is 100%. The origin of this sulfur is not yet decided if it is native sulfur deposits originated from underground source ,which could related to the subsurface hydrocarbons seepage in the area or released biologically from underneath evaporatic rocks and dissolved in ground water which derived to the surface by capillary phenomenon, the sulfur which precipitated later by evaporation of salty water. This is a first study of this phenomenon, and it needs more detailed studies to predict a final real hypothesis.

جمعت تسع عينات من قطع صخرية صفراء اللون متناثرة على سطح الارض ومن موقعين متقاربين نسبيا في منطقة ابي الخصيب ولفترة امتدت من شباط(2005) ولغاية كانون ثان (2006) ، وبعد اجراء المسوحات الحقلية التفصيلية للمنطقة وتحليل النماذج كيميائيا ومعدنيا بالاستعانة بجهاز المسبار الالكتروني ظهر ان نسبة عنصر الكبريت في العينات المختارة بلغت 100%. ان مصدر هذا الكبريت غير معروف لحد الان فيما اذا كان قد جاء من مصادر تحت سطحية مرتبطة بوجود نضوحات هيدروكاربونية في تلك المنطقة او انه استخلص من صخور المتبخرات تحت السطحية بايولوجيا وذاب ضمن المياه الجوفية والتي ساقته نحو السطح بوساطة الخاصية الشعرية ثم تركز على السطح بشكل ترسبات سطحية متناثرة بعد تبخر المياه المالحة. تعد هذه الدراسة الاولى لهذه الظاهرة وهناك حاجة الى دراسات مفصلة اخرى للتنبوء بفرضية نهائية لتفسيرها.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2007 (2)