Aldabra Island xeric scrub

The Aldabra Island xeric scrub is a deserts and xeric shrublands ecoregion located in the Afrotropic biogeographic realm, covering sub-Saharan Africa and the southern Arabian Peninsula, spanning approximately 159.1 km². Classified under the WWF ecoregion code AT1301, this region represents a distinct ecological community shaped by its unique combination of climate, geography, and evolutionary history.

Climate and Vegetation

This ecoregion experiences arid to hyper-arid with extreme temperature fluctuations and minimal rainfall. The dominant vegetation consists of sparse succulents, drought-adapted shrubs, and ephemeral annuals. These conditions create the foundation for the ecological communities found within the Aldabra Island xeric scrub.

Ecological Significance

Desert species exhibit remarkable adaptations to water scarcity, including nocturnal activity patterns, water-storing tissues, and deep root systems. Biological soil crusts play a critical role in nutrient cycling. The Aldabra Island xeric scrub contributes to the broader biodiversity patterns of the Afrotropic realm.

Geographic Distribution

The Aldabra Island xeric scrub extends entirely within Seychelles. This geographic range places it within the Afrotropic realm, one of the eight major biogeographic divisions of the world.

Notable Species

The Aldabra Island xeric scrub supports a range of wildlife, including Abalone (Haliotis unilateralis), Adzuki bean (Vigna angularis), african-juniper (Juniperus procera), African plume (Bauhinia galpinii), African Teak (Milicia excelsa), Aldabra Giant Tortoise (Aldabrachelys gigantea), Allspice (Pimenta dioica), Aloe Yucca (Yucca aloifolia), and 42 more species. Among these, 6 species are classified as threatened on the IUCN Red List, underscoring the conservation importance of this ecoregion.

Conservation

Like many deserts and xeric shrublands ecosystems, the Aldabra Island xeric scrub faces threats from overgrazing, groundwater depletion, solar energy development, and off-road vehicles. Conservation efforts in this ecoregion focus on habitat preservation, sustainable land management, and protecting corridors that connect fragmented habitat patches.