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• W4213306436 abstract "• Aloe lettyae confirmed as narrow Woodbush Granite Grassland (WGG) endemic. • Vegetation structure variables differed significantly between WGG fragments. • Baseline WGG data provides for long-term vegetation monitoring. • Remaining WGG ∼1% of estimated historical WGG extent. • Imperative to conserve all WGG fragments. Fine-scale data on species of special concern in fragments of highly threatened vegetation types are important for conservation management. This study investigated the vegetation structure and composition associated with the range-restricted long-lived Aloe lettyae and documented mesic Woodbush Granite Grassland (WGG) fragments. Google Earth imagery was used to detect WGG remnants in the highly fragmented landscape within the original WGG polygon as outlined on the National Vegetation Map. Field-verified WGG fragments were described (size, ownership, location, condition, observed threats and surrounding land cover types) and searched for A. lettyae . In six of the currently known 13 WGG fragments boasting an A. lettyae population, including two intact large (60–192 ha), two intact small (9–14 ha) and two degraded small (9–10 ha) WGG fragments, we studied the vegetation structure and composition associated with A. lettyae . For all sampled WGG fragments combined, vegetation structure (percentage aerial cover of grass, forb and woody species, bare soil and rock, maximum height (cm) of grass, forb and woody species and standing vegetation biomass (kg/ha)) within 1 m of each A. lettyae individual ( n = 378) and ≥ 5 m away from A. lettyae plants ( n = 442) varied very little. However, vegetation structure variables differed significantly between WGG fragments. For the intact large WGG fragments, percentage aerial cover for grass, forb and woody species were 49–50, 26–37 and 5–15%, respectively, with the small remaining percentages being made up of bare soil and rock cover. In the intact small WGG fragments, percentage aerial cover for grass, forb and woody species was similar to that in the large fragments. In the degraded small WGG fragments, however, percentage aerial cover for grass was significantly higher (66–74%) while the percentage forb cover tended to be lower (8–13%) than in the intact fragments. WGG fragment size ranged from <1 to 192 ha, with the estimate of all currently known extant WGG fragments amounting to a total of ∼6 km 2 , or ∼1% of the estimated historical WGG extent. Therefore, it is imperative to conserve all remaining WGG fragments. We provide fine-scale baseline data on the vegetation structure and composition associated with A. lettyae and a description of extant WGG fragments for long-term vegetation monitoring, management and biodiversity conservation decisions and future research." @default.
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• W4213306436 date "2022-07-01" @default.
• W4213306436 modified "2023-09-25" @default.
• W4213306436 title "Vegetation structure and composition associated with Aloe lettyae in dwindling grassland fragments: Fine-scale baseline data to underpin conservation efforts" @default.
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• W4213306436 doi "https://doi.org/10.1016/j.sajb.2022.02.010" @default.
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