Plant Diversity, Life-form Spectrum, and phytogeographical Distribution in Al-Mahwery Villages and Yabraq Valley, Al-Wadheea, Abyan Yemen

doi:10.22541/au.174712157.79299232/v1

Plant Diversity, Life-form Spectrum, and phytogeographical Distribution in Al-Mahwery Villages and Yabraq Valley, Al-Wadheea, Abyan Yemen

2025 · doi:10.22541/au.174712157.79299232/v1

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This study recorded 291 angiosperm species across diverse habitats in Yemen, dominated by perennial chamaephytes and therophytes, indicating a transitional phytoclimate influenced by Sudano-Zambezian and Saharo-Sindian regions.

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This preprint studied plant diversity, life-form spectrum, and phytogeographical distribution in arid habitats across 50 sites in Al-Mahwery villages and Yabraq Valley, Al-Wadheea, Abyan, Yemen. Across these habitats, the authors recorded 291 angiosperm species from 175 genera and 61 families, with Asteraceae (28 species) and Poaceae (23) as the most species-rich families, and found perennials (189 species) to outnumber annuals (106). Chamaephytes were the dominant life form (39.66%), and the authors interpreted the pattern as a Chamaeo-Therophytic phytoclimate associated with harsh environmental conditions, while phytogeographical analysis indicated influence from the Sudano-Zambezian and Saharo-Sindian regions; the study is limited by being a preprint and not peer-reviewed. The paper does not explicitly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.

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Abstract

This study provides essential insights into plant diversity in arid environments by examining floristic composition, life forms, and life span patterns across 50 sites representing diverse habitats such as alluvial plains, gravel plains, and wadis. A total of 291 species belonging to 175 genera and 61 families of angiosperms were recorded, reflecting a remarkable level of plant diversity in the region. The most species-rich families were Asteraceae (28 species), followed by Poaceae (23 species) and Apocynaceae (19 species). Regarding life span, perennial species dominated with 189 species, compared to 106 annual species. In terms of life forms, chamaephytes were the most dominant (39.66%), followed by therophytes (24.06%), phanerophytes (19.32%), hemicryptophytes (9.49%), geophytes (4.40%), parasitic plants (2.71%), and epiphytes (0.34%). This distribution indicates a Chamaeo-Therophytic phytoclimate, reflecting the adaptation of vegetation to harsh environmental conditions. Phytogeographical analysis revealed that the vegetation of the study area is influenced by two major regions: the Sudano-Zambezian and the Saharo-Sindian, highlighting the ecological significance of the area as a transitional zone with high biodiversity value.

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Posted on 13 May 2025 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.174712157.79299232/v1 — This is a preprint and has not been peer-reviewed. Data may be preliminary. Plant Diversity, Life-form Spectrum, and phytogeographical Distribution in Al-Mahwery Villages and Yabraq Valley, Al-Wadheea, Abyan Yemen Madleen Obel 1, Mona Alwahibi 2, Hana AL- Quhbi 3, Mohammed Hussien 4, and Rania Ali 5 1 Zingibar Abyan university 2King Saud University 3University of Aden 4Zingiber Abyan university 5Omar Al-Moukhtar University May 13, 2025 Abstract This study provides essential insights into plant diversity in arid environments by examining ﬂoristic composition, life forms, and life span patterns across 50 sites representing diverse habitats such as alluvial plains, gravel plains, and wadis. A total of 291 species belonging to 175 genera and 61 families of angiosperms were recorded, reﬂecting a remarkable level of plant diversity in the region. The most species-rich families were Asteraceae (28 species), followed by Poaceae (23 species) and Apocynaceae (19 species). Regarding life span, perennial species dominated with 189 species, compared to 106 annual species. In terms of life forms, chamaephytes were the most dominant (39.66%), followed by therophytes (24.06%), phanerophytes (19.32%), hemicryptophytes (9.49%), geophytes (4.40%), parasitic plants (2.71%), and epiphytes (0.34%). This distribution indicates a Chamaeo-Therophytic phytoclimate, reﬂecting the adaptation of vegetation to harsh environmental conditions. Phytogeo- graphical analysis revealed that the vegetation of the study area is inﬂuenced by two major regions: the Sudano-Zambezian and the Saharo-Sindian, highlighting the ecological signiﬁcance of the area as a transitional zone with high biodiversity value. Hosted ﬁle NJB taxonomy template for authors ver4 _0.docx available at https://authorea.com/users/ 923024/articles/1294926-plant-diversity-life-form-spectrum-and-phytogeographical- distribution-in-al-mahwery-villages-and-yabraq-valley-al-wadheea-abyan-yemen Hosted ﬁle Figures.docx available at https://authorea.com/users/923024/articles/1294926-plant-diversity- life-form-spectrum-and-phytogeographical-distribution-in-al-mahwery-villages-and-yabraq- valley-al-wadheea-abyan-yemen Hosted ﬁle Tables.docx available at https://authorea.com/users/923024/articles/1294926-plant-diversity- life-form-spectrum-and-phytogeographical-distribution-in-al-mahwery-villages-and-yabraq- valley-al-wadheea-abyan-yemen 1

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