机构:
Nelson Mandela Univ, Bot Dept, South Campus, Port Elizabeth, Eastern Cape, South AfricaUniv Pretoria, Ctr Microbial Ecol & Genom, Dept Biochem Genet & Microbiol, Pretoria, Gauteng, South Africa
This study examines the soil bacterial diversity in the Portulacaria afra-dominated succulent thicket vegetation of the Albany Subtropical Thicket biome; this biome is endemic to South Africa. The aim of the study was to compare the soil microbiomes between intact and degraded zones in the succulent thicket and identify environmental factors which could explain the community compositions. Bacterial diversity, using 16S amplicon sequencing, and soil physicochemistry were compared across three zones: intact (undisturbed and vegetated), degraded (near complete removal of vegetation due to browsing) and restored (a previously degraded area which was replanted approximately 11 years before sampling). Amplicon Sequence Variant (ASV) richness was similar across the three zones, however, the bacterial community composition and soil physicochemistry differed across the intact and degraded zones. We identified, via correlation, the potential drivers of microbial community composition as soil density, pH and the ratio of Ca to Mg. The restored zone was intermediate between the intact and degraded zones. The differences in the microbial communities appeared to be driven by the presence of plants, with plant-associated taxa more common in the intact zone. The dominant taxa in the degraded zone were cosmopolitan organisms, that have been reported globally in a wide variety of habitats. This study provides baseline information on the changes of the soil bacterial community of a spatially restricted and threatened biome. It also provides a starting point for further studies on community composition and function concerning the restoration of degraded succulent thicket ecosystems.
机构:
Wageningen Univ, Soil Sci Ctr, Soil Phys & Land Management Grp, NL-6700 AA Wageningen, Netherlands
Living Lands, ZA-6335 Patensie, South AfricaWageningen Univ, Soil Sci Ctr, Soil Phys & Land Management Grp, NL-6700 AA Wageningen, Netherlands
van Luijk, G.
Cowling, R. M.
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Nelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6032 Port Elizabeth, South AfricaWageningen Univ, Soil Sci Ctr, Soil Phys & Land Management Grp, NL-6700 AA Wageningen, Netherlands
Cowling, R. M.
Riksen, M. J. P. M.
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Wageningen Univ, Soil Sci Ctr, Soil Phys & Land Management Grp, NL-6700 AA Wageningen, NetherlandsWageningen Univ, Soil Sci Ctr, Soil Phys & Land Management Grp, NL-6700 AA Wageningen, Netherlands
Riksen, M. J. P. M.
Glenday, J.
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Living Lands, ZA-6335 Patensie, South Africa
Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USAWageningen Univ, Soil Sci Ctr, Soil Phys & Land Management Grp, NL-6700 AA Wageningen, Netherlands
机构:
Nelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South AfricaNelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South Africa
van der Vyver, Marius L.
Cowling, Richard M.
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Nelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South AfricaNelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South Africa
Cowling, Richard M.
Campbell, Eileen E.
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Nelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South AfricaNelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South Africa
Campbell, Eileen E.
Difford, Mark
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Nelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South AfricaNelson Mandela Metropolitan Univ, Dept Bot, Restorat Res Grp, ZA-6031 Port Elizabeth, South Africa