Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari

Standard

Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari. / Elliott, David R.; Thomas, Andrew D.; Hoon, Stephen R.; Sen, Robin.

In: Biodiversity and Conservation, Vol. 23, No. 7, 01.06.2014, p. 1709-1733.

Research output: Contribution to journalArticle

Author

Elliott, David R. ; Thomas, Andrew D. ; Hoon, Stephen R. ; Sen, Robin. / Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari. In: Biodiversity and Conservation. 2014 ; Vol. 23, No. 7. pp. 1709-1733.

Bibtex - Download

@article{f7862ba364e04155906ecb0cab143adc,
title = "Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari",
abstract = "The Kalahari of southern Africa is characterised by sparse vegetation interspersed with microbe-dominated biological soil crusts (BSC) which deliver a range of ecosystem services including soil stabilisation and carbon fixation. We characterised the bacterial communities of BSCs (0–1 cm depth) and the subsurface soil (1–2 cm depth) in an area typical of lightly grazed Kalahari rangelands, composed of grasses, shrubs, and trees. Our data add substantially to the limited amount of existing knowledge concerning BSC microbial community structure, by providing the first bacterial community analyses of both BSCs and subsurface soils of the Kalahari region based on a high throughput 16S ribosomal RNA gene sequencing approach. BSC bacterial communities were distinct with respect to vegetation type and soil depth, and varied in relation to soil carbon, nitrogen, and surface temperature. Cyanobacteria were predominant in the grass interspaces at the soil surface (0–1 cm) but rare in subsurface soils (1–2 cm depth) and under the shrubs and trees. Bacteroidetes were significantly more abundant in surface soils of all areas even in the absence of a consolidated crust, whilst subsurface soils yielded more sequences affiliated to Acidobacteria, Actinobacteria, Chloroflexi, and Firmicutes. The common detection of vertical stratification, even in disturbed sites, suggests a strong potential for BSC recovery after physical disruption, however severe depletion of Cyanobacteria near trees and shrubs may limit the potential for natural BSC regeneration in heavily shrub-encroached areas.",
keywords = "biological soil crust, 454 pyrosequencing, bacterial community, Kalahari Sand, carbon, vegetation",
author = "Elliott, {David R.} and Thomas, {Andrew D.} and Hoon, {Stephen R.} and Robin Sen",
note = "Elliott, D. R., Thomas, A. D., Hoon, S. R., Sen, R. (2014). Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari. Biodiversity & Conservation, 23 (7), 1709-1733",
year = "2014",
month = jun,
day = "1",
doi = "10.1007/s10531-014-0684-8",
language = "English",
volume = "23",
pages = "1709--1733",
journal = "Biodiversity and Conservation",
issn = "0960-3115",
publisher = "Springer Nature",
number = "7",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari

AU - Elliott, David R.

AU - Thomas, Andrew D.

AU - Hoon, Stephen R.

AU - Sen, Robin

N1 - Elliott, D. R., Thomas, A. D., Hoon, S. R., Sen, R. (2014). Niche partitioning of bacterial communities in biological crusts and soils under grasses, shrubs and trees in the Kalahari. Biodiversity & Conservation, 23 (7), 1709-1733

PY - 2014/6/1

Y1 - 2014/6/1

N2 - The Kalahari of southern Africa is characterised by sparse vegetation interspersed with microbe-dominated biological soil crusts (BSC) which deliver a range of ecosystem services including soil stabilisation and carbon fixation. We characterised the bacterial communities of BSCs (0–1 cm depth) and the subsurface soil (1–2 cm depth) in an area typical of lightly grazed Kalahari rangelands, composed of grasses, shrubs, and trees. Our data add substantially to the limited amount of existing knowledge concerning BSC microbial community structure, by providing the first bacterial community analyses of both BSCs and subsurface soils of the Kalahari region based on a high throughput 16S ribosomal RNA gene sequencing approach. BSC bacterial communities were distinct with respect to vegetation type and soil depth, and varied in relation to soil carbon, nitrogen, and surface temperature. Cyanobacteria were predominant in the grass interspaces at the soil surface (0–1 cm) but rare in subsurface soils (1–2 cm depth) and under the shrubs and trees. Bacteroidetes were significantly more abundant in surface soils of all areas even in the absence of a consolidated crust, whilst subsurface soils yielded more sequences affiliated to Acidobacteria, Actinobacteria, Chloroflexi, and Firmicutes. The common detection of vertical stratification, even in disturbed sites, suggests a strong potential for BSC recovery after physical disruption, however severe depletion of Cyanobacteria near trees and shrubs may limit the potential for natural BSC regeneration in heavily shrub-encroached areas.

AB - The Kalahari of southern Africa is characterised by sparse vegetation interspersed with microbe-dominated biological soil crusts (BSC) which deliver a range of ecosystem services including soil stabilisation and carbon fixation. We characterised the bacterial communities of BSCs (0–1 cm depth) and the subsurface soil (1–2 cm depth) in an area typical of lightly grazed Kalahari rangelands, composed of grasses, shrubs, and trees. Our data add substantially to the limited amount of existing knowledge concerning BSC microbial community structure, by providing the first bacterial community analyses of both BSCs and subsurface soils of the Kalahari region based on a high throughput 16S ribosomal RNA gene sequencing approach. BSC bacterial communities were distinct with respect to vegetation type and soil depth, and varied in relation to soil carbon, nitrogen, and surface temperature. Cyanobacteria were predominant in the grass interspaces at the soil surface (0–1 cm) but rare in subsurface soils (1–2 cm depth) and under the shrubs and trees. Bacteroidetes were significantly more abundant in surface soils of all areas even in the absence of a consolidated crust, whilst subsurface soils yielded more sequences affiliated to Acidobacteria, Actinobacteria, Chloroflexi, and Firmicutes. The common detection of vertical stratification, even in disturbed sites, suggests a strong potential for BSC recovery after physical disruption, however severe depletion of Cyanobacteria near trees and shrubs may limit the potential for natural BSC regeneration in heavily shrub-encroached areas.

KW - biological soil crust

KW - 454 pyrosequencing

KW - bacterial community

KW - Kalahari Sand

KW - carbon

KW - vegetation

UR - http://hdl.handle.net/2160/29935

U2 - 10.1007/s10531-014-0684-8

DO - 10.1007/s10531-014-0684-8

M3 - Article

VL - 23

SP - 1709

EP - 1733

JO - Biodiversity and Conservation

JF - Biodiversity and Conservation

SN - 0960-3115

IS - 7

ER -

Show download statistics
View graph of relations
Citation formats