salma K . shaltout - Profile on Academia.edu (original) (raw)

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Papers by salma K . shaltout

Journal of ecology and environment, Jan 31, 2024

The present study aims to identify the pattern and size of Juniperus species (Juniperus phoenicea... more The present study aims to identify the pattern and size of Juniperus species (Juniperus phoenicea and J. procera) in the natural forests in terms of tree dimension, size structure and density, discussing the existing both species in Sarrawat Mountains for suggesting the preservation, conservation, and sustainable development. For achieving this, the height and mean crown diameter of each individual was measured based on 2-4 diameter measurements per ind. (506 ind. for J. phoenicea and 322 ind. for J. procera). The size index of both species was classified into 7 classes: the first (< 100 cm) and the second (100-200 cm) classes were chosen to represent the juvenile stage. The total mean of the J. phoenicea population increased with the increase of altitude, while the whole population decreased after altitude of 2,000 m. The total mean of the J. procera population increased with the increase of altitude till altitude of 2,000-2,100 m. Conclusions: The present study indicated that both of species grow at low altitudes, they only grow at altitude above 1,700 m above sea level. The present study indicated that the study area has the two Juniperus spp. (J. phoenicea and J. procera) associated together all over the area. The results were discussed and compared with other related studies.

Journal of Coastal Conservation, Jan 3, 2024

The IUCN Red List, which provides data on distribution, ecology and habitats, population size, ec... more The IUCN Red List, which provides data on distribution, ecology and habitats, population size, economic uses, threats and conservation actions, is a critical indicator of the status of the world's biodiversity and will assist in informing a necessary conservation decision. The Mediterranean region is characterized by a heavy endemism of plant diversity, where the majority of its species are narrow endemic species. The current investigation aims at evaluating the conservation status, degree of extinction of Mediterranean endemic plants in Egypt and their changes over the recent climate changes. Twenty Field trips were conducted from February 2017 to March 2023, investigating different regions in the coastal Mediterranean strip in Egypt. In addition, all the previous studies performed in the investigated area, scientific literature, and different herbaria have been taken into consideration. Coordinates, main habitats and threats for 15 Mediterranean endemic taxa were conducted during visits to evaluate their level of conservation depending on IUCN categories. The current investigation indicated that nine taxa were found to be threatened (7 endangered, 2 critically endangered). In addition, four taxa were believed to be extinct, while two species were recorded as Data Deficient. Climate changes (drought and excessive temperature) and human impacts (urbanization and tourism) are the most effective threats on the taxa in this region. The present investigation is the pioneer study for completely evaluation of these taxa according to IUCN criteria.

Diversity

In this study, we evaluated the species diversity, density, cover, and size index of plant specie... more In this study, we evaluated the species diversity, density, cover, and size index of plant species within and outside 37 enclosures in the South Sinai mountainous region (Egypt), which had been protected for six years (March 2012–March 2018) against over-grazing and over-cutting for medicinal and fuel purposes. Within and outside the enclosures, the plant species were recorded, and their density (individuals per 100 m2) and cover (cm per 100 cm) were estimated using the line-intercept method. The biovolume of each individual of each species was calculated as the average of its height and diameter. The species richness was calculated as the average number of species per enclosure, and the species turnover was calculated as the ratio between the total number of species and the species richness. The relative evenness was calculated using the Shannon–Weaver index, whereas the relative concentration of dominance was calculated using the Simpson index. Detrended correspondence analysis (D...

Taeckholmia

The present study aims to update the list of the alien species in the Egyptian flora, which prepa... more The present study aims to update the list of the alien species in the Egyptian flora, which prepared from literature reviewing, field trips and herbaria consultation. The recent list includes 250 taxa (11.7% of the Egyptian flora); including 5 subspecies and two varieties; related to 161 genera and 41 families. Three states of alien species are recognized: causals (114 taxa), naturalized (129 taxa) and, invasive (7 taxa). The most represented life form is the therophytes. On the other hand, four geophytes-helophytes and three hydrophytes. Four major habitats supporting the distribution of these species: cultivated land, wetland, ruderal and natural habitats. The cultivated lands are the most represented. These alien taxa belong to 16 origins: 12 in the Old World (with 156 taxa) and four origin belong to New World (with 117 taxa), Pantropic (with four taxa) and palaeotropics (with 11 taxa). The same taxon may have more than origin. The most represented taxa were from South and Tropical America (58 taxa = 23.2 %), South Asia (51 taxa = 20.4 %) followed by Europe (38 = 15.2 %). The highest taxa were recorded in family Poaceae (74), Amaranthaceae s.l. (25), Fabaceae (23), Asteraceae (20), Solanaceae (16) followed Euphorbiaceae (10 taxa).