Cairo University Herbarium (CAI)Taeckholmia1110-741321220011231Species composition and population density of Phytoplankton of Great Bitter Lake, Suez Canal, Egypt.1872031246410.21608/taec.2001.12464ENMonaGab AllahBotany Department, Faculty of Science,
Ismailia, Suez Canal University.Journal Article20001210The structure and dynamic of phytoplankton assemblages in Great Bitter Lakes were studied seasonally during<br />the period from May 1999 to February 2000. Population density varied between112198X103 cells. l-1 in spring<br />and 2382X106 cells. l-1 in winter. In terms of cell number, Bacillariophyceae was the most important group<br />(mean annual percentage contribution was 67%), which remained dominant throughout the study period.<br />Cyanophyceae ranked the second abundant group (14 %) dominated in autumn and winter. The contribution of<br />Dinophyceae and Chlorophyceae were 8.6 and 7.3% respectively. The other classes contributed with very low<br />share of the total phytoplankton. The relationship between phytoplankton composition and physico-chemical<br />variables was studied. CCA analysis indicated that water salinity, and temperature are the most important factors<br />affecting phytoplankton distribution. The trophic status index indicated that the lake ranked between<br />mesotrophic and moderately eutrophic. In winter, the lake was under blooming due to the luxuriance growth of<br />Nitzschia pseudo delicatissima Hasle. and Phormidium sp. The impact of pollution was significantly effective in<br />the western side of the lake compared to the eastern one.https://taec.journals.ekb.eg/article_12464_357e81677f7cac87f019a61f10c40551.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Macroalgal communities of the Suez Canal after the recent improvement of marine habitats2052191246510.21608/taec.2001.12465ENIslamEl-ManawyDepartment of Botany, Faculty of Science,
Ismailia, Suez Canal University.Journal Article20010112The macroalgal communities of the Suez Canal were seasonally investigated at 16 sites during 1996 and 2000. A<br />hundred and twenty eight taxa including 15 new records were identified. The recent reduction of navigation and<br />urbanization works resulted in an increase in species richness (42 species) and algal forms.<br />Distribution pattern, seasonal variation, and algal zonation were also examined. All were intensely<br />regulated by substrate, space, depth, light, and water movement during the passage of ships. Sites were clustered,<br />on the basis of species co-occurrence, into five groups, suggesting division of the Suez Canal into four biological<br />sectors. The hard substrata supported distinct algal zones. Cladophoropsis zollingeri and Bangia fuscopurpurea<br />characterized the littoral zone. A rich algal community dominated the infralittoral at a depth of 30-150 cm, while<br />a few red species with Caulerpa racemosa were found deeper. Competition for space in some sites was evident<br />by presence of 61 epiphytic macroalgae. A half of these were also found on hard substrata when the space was<br />available.<br />Algal succession in the canal during the past century was also discussed in the light of environmental<br />changes. Algal succession could have passed through four stages; including the establishment of pioneers until<br />1924, the maturity to a climax sometime before1953, degradation of the climax due to navigation and<br />urbanization constructions, and the reestablishment of the climax with the recent improvement in algal habitats.https://taec.journals.ekb.eg/article_12465_7bd56fbb6a3b46a80f12f1e84bcb469b.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Morpho-anatomical characters of the achene in certain species of sub-family Rosoideae (Rosaceae), a comparative study2212381246610.21608/taec.2001.12466ENMagdyMouradBotany Department, Faculty of Science,
Ain Shams University, Cairo, Egypt.Abd El-SalamAl- NowaihiBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.Journal Article20010220The morpho-anatomical characters of 18 species belonging to six genera of sub-family Rosoideae were<br />investigated. The anatomical characters of both the pericarp and testa were found to be impracticable for species<br />delimitation since they are consistent at the generic level. The same reason rendered the character evaluation<br />invaluable within the species of the same genus. Of the morphological characters the mode of the achene<br />vasculature as well as its ramification varied in the different taxa. The basic number of the achene supply is one<br />median and two lateral strands. The behaviour of the latter, whether distinct or fused, as well as the ramification ,<br />or not, of a part or the whole of the vascular skeleton led to the suggestion of a key-like layout which shows the<br />pathway of these character states as being primitive vs advanced.https://taec.journals.ekb.eg/article_12466_c1436e2b533ec04d28e8e06db25dedee.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Plantaginaceae in the flora of Egypt 1.Systematic revision of the indigenous taxa2392551246710.21608/taec.2001.12467ENAmalHosnyThe Herbarium,Faculty of Science,
Cairo University, Giza-12613,Egypt.NahedWalyThe Herbarium,Faculty of Science,
Cairo University, Giza-12613,Egypt.Journal Article20010220Plantago is the representative genus of Plantaginaceae in Egypt, it comprises 19 species of which Plantago<br />weldenii Rchb. is recorded new to the flora of Egypt. Stem, leaf shape and size, and inflorescence are key<br />characters while floral characters are useful for the separation between the closely allied taxa.https://taec.journals.ekb.eg/article_12467_a3a08a9747d8817d9dfbc6d98701b9d8.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Capparaceae in the flora of Egypt2572671246810.21608/taec.2001.12468ENZeinabEl KaremyBotany Department, Faculty of Science,
Assiut University, Assiut, EgyptJournal Article20010207A systematic revision of the native species of the family Capparaceae (Cleome excluded) was carried out. The<br />presence of Boscia angustifolia in Egypt is uncertain, while Capparis spinosa is represented in Egypt by 3<br />varieties viz. : spinosa, inermis & deserti.<br />Diagnostic characters of the taxa are given and a key for the separation of species and varieties, synonyms and<br />notes on distribution are provided. SEM features of the leaf epidermis were proved to be of taxonomic<br />significance.https://taec.journals.ekb.eg/article_12468_61f85f51cd05b5fce9363e9d6f66b186.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Effect of Petroleum oil on the germination, growth and yield of broad bean plants2692821246910.21608/taec.2001.12469ENH.El- TantawyScience Department, College of Basic Education P.O. Box 34053, Adailya, KuwaitA.El- HilalyScience Department, College of Basic Education P.O. Box 34053, Adailya, KuwaitJournal Article20001220The effect of crude oil on germination, growth and yield of broad bean was tested in contaminated soil. A series<br />of soil pollution levels, ranged between 1% and 10% (w/w) were prepared. The seed germination, vegetative<br />growth and yield of broad bean were investigated. Low concentration of crude oil was found to stimulate the<br />vegetative growth and increase the yield. High concentration of crude oil (4% and above) reduced the<br />germination percentage ,vegetative growth and yield. At concentrations of 8% & 10%, many seedlings had<br />reduced growth and survival. Hydrocarbons accumulated in shoot and pods (seeds) were separated and<br />monitored by quantitative gas chromatography (GC.). The residual n-alkanes and iso-alkanes of the saturates<br />fraction were decreased with increasing the pollution levels. Lighter n-alkanes (C10 – C20) were found only in the<br />shoots, while the higher carbon number n-alkanes (C20 – C31) were detected in both shoots and pods. The results<br />suggested not to grow edible plants in areas subjected to low or high concentration of petroleum oil.https://taec.journals.ekb.eg/article_12469_b7acbb761fbde1bb79f89ddb1f2177de.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Contributions to the moss flora of the Egyptian Oases. 1. Farafra Oasis.2832901247010.21608/taec.2001.12470ENUsama,Abou-SalamaBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.WagiehEl-SaadawiBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.Journal Article20010720Twelve moss species are reported for the first time from Farafra Oasis (Western Desert of Egypt). Eight of them<br />belong to Bryum of which Bryum inclinatum is a new record to Egypt. The number of mosses known from the<br />Oases territory is raised from 15 to 23 species. Floristic comparisons show more elements in common with<br />Northern Africa and Sinai than with the Nile Region.https://taec.journals.ekb.eg/article_12470_af787bd9f23223056a7524c0e3f95b23.pdfCairo University Herbarium (CAI)Taeckholmia1110-741321220011231Contributions to the moss flora of the Egyptian Oases. 2. Siwa Oasis2913021247110.21608/taec.2001.12471ENMahmoudRefaiBotany Department, Faculty of Science,
Ain Shams University, Cairo-Egypt.Journal Article20010730Ten moss species are reported as pioneer records of the Bryoflora in Siwa oasis. All taxa except Bryum species<br />are new records to Libyan Oases territory, while Tortella inclinata is a new record to Egypt. This brings the total<br />number of fully identified Egyptian mosses to 176 entities and that of Egyptian Oases to 30 mosses. Bryum<br />bicolor is recorded fruiting for the first time in Egypt. Notes on habitats, sex organs and fruiting are given. Key<br />for the recorded species and illustrated drawings for Tortella inclinata & Bryum bicolor are also provided.https://taec.journals.ekb.eg/article_12471_c7352c9190a0d0ce31b70f7cd777c8c0.pdf