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| DOI | 10.1093/aob/mcae009 |
| Patterns of Grewia (Malvaceae) diversity across geographical scales in Africa and Madagascar | |
| 发表日期 | 2024 |
| ISSN | 0305-7364 |
| EISSN | 1095-8290 |
| 起始页码 | 133 |
| 结束页码 | 5-6 |
| 卷号 | 133期号:5-6 |
| 英文摘要 | Background and Aims Quantifying spatial species richness is useful to describe biodiversity patterns across broad geographical areas, especially in large, poorly known plant groups. We explore patterns and predictors of species richness across Africa in one such group, the palaeotropical genus Grewia L. (Malvaceae).Methods Grewia species richness was quantified by extracting herbarium records from GBIF and Tropicos and creating geographical grids at varying spatial scales. We assessed predictors of species richness using spatial regression models with 30 environmental variables. We explored species co-occurrence in Madagascar at finer resolutions using Schoener's index and compared species range sizes and International Union for Conservation of Nature status among ecoregions. Lastly, we derived a trait matrix for a subset of species found in Madagascar to characterize morphological diversity across space.Key Results Grewia species occur in 50 countries in Africa, with the highest number of species in Madagascar (93, with 80 species endemic). Species richness is highest in Madagascar, with <= 23 Grewia species in a grid cell, followed by coastal Tanzania/Kenya (<= 13 species) and northern South Africa and central Angola (11 species each). Across Africa, higher species richness was predicted by variables related to aridity. In Madagascar, a greater range in environmental variables best predicted species richness, consistent with geographical grid cells of highest species richness occurring near biome/ecoregion transitions. In Madagascar, we also observe increasing dissimilarity in species composition with increasing geographical distance.Conclusions The spatial patterns and underlying environmental predictors that we uncover in Grewia represent an important step in our understanding of plant distribution and diversity patterns across Africa. Madagascar boasts nearly twice the Grewia species richness of the second most species-rich country in Africa, which might be explained by complex topography and environmental conditions across small spatial scales. |
| 英文关键词 | Africa; co-occurrence; endemism; environmental heterogeneity; Grewia; Madagascar; Malvaceae; morphological diversity; spatial diversity; species richness |
| 语种 | 英语 |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| WOS记录号 | WOS:001160705500001 |
| 来源期刊 | ANNALS OF BOTANY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/302624 |
| 作者单位 | Missouri Botanical Gardens; Eastern Michigan University |
| 推荐引用方式 GB/T 7714 | . Patterns of Grewia (Malvaceae) diversity across geographical scales in Africa and Madagascar[J],2024,133(5-6). |
| APA | (2024).Patterns of Grewia (Malvaceae) diversity across geographical scales in Africa and Madagascar.ANNALS OF BOTANY,133(5-6). |
| MLA | "Patterns of Grewia (Malvaceae) diversity across geographical scales in Africa and Madagascar".ANNALS OF BOTANY 133.5-6(2024). |
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