eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-31
20
2
115
122
10.21608/taec.2000.12480
12480
Original Article
Spatial relationship of ephemeral plants to Artemisia monosperma (Asteraceae) canopy in Egyptian deserts
Mohamed ZAYED
1
Detlef Bartsch
2
Botany Dept., Fac. of Science, El-Menoufiya University, 32511, Egypt.
Biology V, Aachen University of Technology RWTH, 52056 Aachen Germany
In desert plant communities, annual plant species interact both positively and negatively with perennial shrubs.In this study, the influence of Artemisia monosperma shrubs on soil nutrients, plant density and biomass ofannual plants underneath and outside the canopy was examined. Two desert habitats were compared with similarsoil texture but with different climatic attributes. Levels of soil nitrogen, phosphorus and organic matter weresignificantly higher underneath than between shrubs, but differed between the two habitats which may beattributed to differences in climatic conditions. Despite higher availability of nutrients underneath the canopy,density and biomass of most ephemerals were lower than between shrubs. An hypothetic explanation could bethe difference in canopy shading or water supply as well as allelopathic effects of oil leachates from the shrubs.
https://taec.journals.ekb.eg/article_12480_603bd1934c695ec0961907952c04a9b9.pdf
Allelopathy
Artemisia monosperma
nitrogen
phosphorus
Soil nutrients
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-01
20
2
123
138
10.21608/taec.2000.12552
12552
Original Article
Seasonal variation in phytomass and nutrient status of Phragmites australis along the water courses in the middle Nile Delta, Egypt.
Hassan El-Kady
1
Botany Department, Faculty of Science, Tanta University, Tanta, Egypt.
The present study provides an evaluation of the nutrient status of Phragmites australis, which is one of the mostimportant weeds along the water courses in the middle Nile Delta Egypt. Shoots were collected seasonally fromtwenty-five permanent stands. Living and dead parts and total phytomass were estimated. The inorganic (Na, K,Ca, Fe, Mg, P, Cu, Mn, Zn, Pb and Co) and organic (carbohydrates, total nitrogen, total protein, ether extract,crude fiber and ash) contents were estimated. Some digestible and energy parameters (digestible protein, totaldigestible nutrient, digestible energy, metaboilse energy, and net energy) were calculated. Based on the nutrientanalysis, the present study evaluated the nutritive value of plant as a poor forage.
https://taec.journals.ekb.eg/article_12552_86a10e102fd683434d93c2dd3320f2e4.pdf
Phragmites australis
water courses
Nile Delta
phytomass
nutritive value
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-01
20
2
139
146
10.21608/taec.2000.12555
12555
Original Article
Contributions to the moss flora of the Isthmic Desert, Sinai; Egypt
Mahmoud Refai
1
Wagieh El- Saadawi
elsaadawy@link.com.eg
2
Botany Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Sixteen moss species are reported as new records from Gebel Dalfa and Ain Qadies of the Isthmic Desert inNorthern Sinai, among these seven species are new records to the Isthmic Desert while Trichostomumbrachydontium, is a new record to the flora of Egypt. This brings the total number of fully identified mossesknown from Isthmic Desert to 32 taxa. Notes on habitats, fruiting, sex organs and gemmae are given.
https://taec.journals.ekb.eg/article_12555_dabcc1bc4b18042b8999ebaa143fdb64.pdf
Bryoflora
Egypt
Isthmic Desert
moss flora
Northern Sinai
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-01
20
2
147
157
10.21608/taec.2000.12560
12560
Original Article
Fossil plant remains from Oligocene (?) of Farafra Oasis, Egypt
Mona Darwish
monahd@mailexcite.com
1
Amin Strougo
2
Wagieh El- Saadawi
elsaadawy@link.com.eg
3
Botany Department, Faculty of Girls, Ain Shams University, Cairo, Egypt.
Geology Department, Faculty of Science Ain Shams University,Cairo, Egypt.
Botany Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Well preserved fragments of fossil leaves of Dipterocarpophyllum , Cyperaceae, Gramineae and a pod-like fruitare described from Oligocene (?) of Farafra Oasis, Egypt
https://taec.journals.ekb.eg/article_12560_97d8b6c6f1ef89708efb907cf2db56de.pdf
Cyperaceae
Dipterocarpophyllum
Egypt
Farafra
Fossil-fruits-leaves
Gramineae
Oligocene
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-31
20
2
159
171
10.21608/taec.2000.12565
12565
Original Article
Algal Flora of Egyptian Soils 1. The occurrence of Cyanobacteria and Algae in some habitats
Abd El-Salam Shaaban
1
Adel Hamed
2
Hoda Mansour
3
Botany Department, Faculty of Science, Ain Shams University, Abbasia, Cairo, Egypt
Botany Department, Faculty of Science, Ain Shams University, Abbasia, Cairo, Egypt
Botany Department, Faculty of Science, Ain Shams University, Abbasia, Cairo, Egypt
The culturing of reclaimed soils (from Burg El-Arab and Modiriya El-Tahrir areas) and old soils of Nile Valley(from Dakahlia , Giza and Luxor areas) on Myre's, Chu's No 10 and Beijerinck's artifiial media contributed tothe isolation and identification of 78 algal taxa related to 31 genera belonging to Cyanophycophyta (52.6 %),Chlorophycophyta (28.2%), Xanthophycophyta (8.9 %), Bacillariophycophyta (7.7 %) and Euglenophycophyta(2.6 %). No single region contains all taxa recorded in the investigated soils. Although, each soil had its owncharacteristic algal flora and edaphic factors , they participated mostly in the production of Chlamydomonaskomma Skuja, followed by Amorphonostoc punctiforme (Kütz.) Elenk., Stratonostoc linckia f. spongiaeforme(Ag.) Kütz, Calothrix elenkinii Kossinsk., Hantzschia amphioxys f. capitata O. Mull., Chloroclosterraphidioides Patch., Chlorella vulgaris Beij. and Scenedesmus bijugatus (Turp.) Kütz. The edaphic propertiesshowed that slightly alkaline to alkaline pH reaction favoured the prevailence of members of Cyanobacteria inthe investigated soils. The representation of iron - tolerated taxon Chloridella ferruginea Pasch. between theyellow green algae recorded in Dakahlia emphasized the relativley high level of iron in this soil. The presentwork added 38 new taxa to Egyptian algal flora. However, full descriptions as well as expressive illustrationsand / or photos of the new reccords will be the subject of a future publication.
https://taec.journals.ekb.eg/article_12565_2b23d2d103b23aae05cb565752789720.pdf
edaphic factors
New records
soil algae
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-31
20
2
173
179
10.21608/taec.2000.12567
12567
Original Article
Pollen Atlas for the Flora of Egypt 1. Centaurea L. and allied genera, Compositae
Zeinab El Karemy
aafyed65@yahoo.com
1
Botany Department, Faculty of Science, Assiut University, Assiut, Egypt
Pollen grains of 15 species belonging to Centaurea and three allied genera of Compositae in Egypt werestudied. Pollen characters, including those of size, shape, exine sculpture and structure of the aperture allowedthe recogrition of three pollen types : Centaurea, Amberboa and Carthamus. A key for the separation of thedifferent species is provided.
https://taec.journals.ekb.eg/article_12567_4c99436cd9ea4ce1599376ecd7105646.pdf
Centaurea and allied genera
Flora of Egypt
Pollen Atlas
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-31
20
2
181
194
10.21608/taec.2000.12568
12568
Original Article
Alliaceae in the flora of Egypt 1. Systematic revision of the indigenous species of Allium L.
Ibrahim El Garf
ibrahim.elgarf@yahoo.com
1
The Herbarium, Faculty of Science, Cairo University, Giza 12613, Egypt.
The indiginous taxa of Allium L. represented in the flora of Egypt were systematically revised. This revealed thepresence of 20 species belonging to 4 sections. For each species, valid name, synonymes (if any), type,distribution (local and golbal) and representative specimens are given. A key for the seperation of the species isprovided.
https://taec.journals.ekb.eg/article_12568_231c639fb9cbbe98dc525e32116dc92d.pdf
Flora of Egypt
Alliaceae
Allium L
eng
Cairo University Herbarium (CAI)
Taeckholmia
1110-7413
2357-044X
2000-12-31
20
2
195
198
10.21608/taec.2000.12569
12569
The Rediscovery of Papyrus (Cyperus papyrus L.), on the bank of the Damietta branch of the Nile Delta, Egypt
Mamdouh Serag
serag_1999@yahoo.com
1
Botany Department, Faculty of Science, Mansoura University, New Damietta, P.O. Box 34517 (54), Egypt
Cyperus papyrus was rediscovered in two stands on the eastern bank of the Damietta branch of the Nile Delta.The first stand is located at Sharabas village ca. 24 km south of Damietta. The growth of papyrus at this site isrich and giant where the habitat conditions are favorable for swampy vegetation. The second stand is recorded atDahtora about one kilometer north of Zifta town with a feeble growth of an average height of one meter.Ecological notes and reasons of extinction of this important sedge are briefly discussed.
https://taec.journals.ekb.eg/article_12569_c940e89dca9413daa3912d776abc4dba.pdf
Damietta Branch
Discovery
Nile Delta
Papyrus