Pub Date : 2024-06-01DOI: 10.21608/jesj.2024.289071.1075
Nurah M. Alzamel
: Wadi Al-Quwayiyah, Riyadh Region, Saudi Arabya is one of the most important Wadis of the Kingdom. The current study aimed to determine floristic composition, the structure of the vegetation, and species distribution at four different plant communities in Wadi Al-Quwayiyah, Riyadh Region, Saudi Arabia, and highlighting the ecological factors that affect species distribution. The study revealed forty-two plant species belonging to 21 families were collected and found to be dispersed over four different plant communities : Acacia tortilis, Leptadenia pyrotechnica, Zizuphus nummularia, and Acacia gerradii . Leguminosae and Brassicaceae were the dominant families, and therophytes and chamaephytes and were predominant life forms, which demonstrate a typical desert life-form. Soil texture, organic matter content, Na, CaCO3, Cl, Ca, Mg, pH and EC were the primary parameters affecting the occurrence of plants. Perennials accounted for 28 of the total reported species in this survey about 66.7% of the listed species. Annuals, on the other hand, accounted for 14 species (33.3%).
{"title":"Floristic Composition, Diversity, and Vegetation Structure in Wadi Al-Quwayiyah, Riyadh Region, Saudi Arabya","authors":"Nurah M. Alzamel","doi":"10.21608/jesj.2024.289071.1075","DOIUrl":"https://doi.org/10.21608/jesj.2024.289071.1075","url":null,"abstract":": Wadi Al-Quwayiyah, Riyadh Region, Saudi Arabya is one of the most important Wadis of the Kingdom. The current study aimed to determine floristic composition, the structure of the vegetation, and species distribution at four different plant communities in Wadi Al-Quwayiyah, Riyadh Region, Saudi Arabia, and highlighting the ecological factors that affect species distribution. The study revealed forty-two plant species belonging to 21 families were collected and found to be dispersed over four different plant communities : Acacia tortilis, Leptadenia pyrotechnica, Zizuphus nummularia, and Acacia gerradii . Leguminosae and Brassicaceae were the dominant families, and therophytes and chamaephytes and were predominant life forms, which demonstrate a typical desert life-form. Soil texture, organic matter content, Na, CaCO3, Cl, Ca, Mg, pH and EC were the primary parameters affecting the occurrence of plants. Perennials accounted for 28 of the total reported species in this survey about 66.7% of the listed species. Annuals, on the other hand, accounted for 14 species (33.3%).","PeriodicalId":517459,"journal":{"name":"Journal of Environmental Studies","volume":"16 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141279116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-17DOI: 10.21608/jesj.2024.260628.1063
Ghada Saad, Ahmed Hassanein, Abdelnasser Galal, deya soltan
: Jojoba tolerates drought, salinity and high temperatures and can be grown on marginal lands . Jojoba is the only plant known that synthesizes liquid wax
:荷荷巴耐旱、耐盐碱、耐高温，可在贫瘠的土地上生长。荷荷巴是已知唯一能合成液态蜡的植物
{"title":"Simmondsia chinensis is a suitable plant candidate to be cultivated in soil of marginal fertility and under stress conditions","authors":"Ghada Saad, Ahmed Hassanein, Abdelnasser Galal, deya soltan","doi":"10.21608/jesj.2024.260628.1063","DOIUrl":"https://doi.org/10.21608/jesj.2024.260628.1063","url":null,"abstract":": Jojoba tolerates drought, salinity and high temperatures and can be grown on marginal lands . Jojoba is the only plant known that synthesizes liquid wax","PeriodicalId":517459,"journal":{"name":"Journal of Environmental Studies","volume":" 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140391051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-01DOI: 10.21608/jesj.2024.270871.1070
Olfat Abdelsaleheen
: Freshwater mussels play an important role in aquatic ecosystems and have been the subject of numerous ecological and taxonomical studies. The present study investigated the shell morphology of A. anatina and U. tumidus with focusing on the width-length, height-length, and width-height relationships in Lake Polvijärvi, Finland. Both species revealed distinct external shell morphologies, where A. anatina exhibited an elongated shell shape with a slightly curved dorsal margin and a smooth surface, while U. tumidus had a shorter and flat shell with a more swollen umbo region and a rough surface. The correlation analysis demonstrated strong positive relationships between width-length, height-length, and width-height variables for both species (R 2 ≥ 0.82). Linear regression models accurately described these relationships indicating that shell width and height increased consistently as shell length increased. Both of A. anatina and U. tumidus exhibited positive slopes in the width-length relationship suggesting a widening of shells with increasing length, however, A. anatina had a higher intercept than U. tumidus indicating a wider shell at a given length in comparison to U. tumidus . In the height-length relationship, both species showed positive relationships, but U. tumidus exhibited a steeper slope indicating a faster rate of increasing shell height with increasing length compared to A. anatina . These findings contribute to understand the patterns of shell morphology for both species; and the observed species-specific dependence have implications for their growth, proportions, ecological adaptations, and shedding light on their ecological niches and evolutionary dynamics.
{"title":"Variations in shell morphology of freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae) from Lake Polvijärvi, Finland","authors":"Olfat Abdelsaleheen","doi":"10.21608/jesj.2024.270871.1070","DOIUrl":"https://doi.org/10.21608/jesj.2024.270871.1070","url":null,"abstract":": Freshwater mussels play an important role in aquatic ecosystems and have been the subject of numerous ecological and taxonomical studies. The present study investigated the shell morphology of A. anatina and U. tumidus with focusing on the width-length, height-length, and width-height relationships in Lake Polvijärvi, Finland. Both species revealed distinct external shell morphologies, where A. anatina exhibited an elongated shell shape with a slightly curved dorsal margin and a smooth surface, while U. tumidus had a shorter and flat shell with a more swollen umbo region and a rough surface. The correlation analysis demonstrated strong positive relationships between width-length, height-length, and width-height variables for both species (R 2 ≥ 0.82). Linear regression models accurately described these relationships indicating that shell width and height increased consistently as shell length increased. Both of A. anatina and U. tumidus exhibited positive slopes in the width-length relationship suggesting a widening of shells with increasing length, however, A. anatina had a higher intercept than U. tumidus indicating a wider shell at a given length in comparison to U. tumidus . In the height-length relationship, both species showed positive relationships, but U. tumidus exhibited a steeper slope indicating a faster rate of increasing shell height with increasing length compared to A. anatina . These findings contribute to understand the patterns of shell morphology for both species; and the observed species-specific dependence have implications for their growth, proportions, ecological adaptations, and shedding light on their ecological niches and evolutionary dynamics.","PeriodicalId":517459,"journal":{"name":"Journal of Environmental Studies","volume":"148 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140286677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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