Seasonality of the soil biota of grazed and ungrazed hill grasslands

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Seasonality of the soil biota of grazed and ungrazed hill grasslands. / Bardgett, R. D.; Leemans, David; Cook, Roger; Hobbs, Philip J.

In: Soil Biology and Biochemistry, Vol. 29, No. 8, 1997, p. 1285-1294.

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Harvard

Bardgett, RD, Leemans, D, Cook, R & Hobbs, PJ 1997, 'Seasonality of the soil biota of grazed and ungrazed hill grasslands', Soil Biology and Biochemistry, vol. 29, no. 8, pp. 1285-1294. https://doi.org/10.1016/S0038-0717(97)00019-9

APA

Bardgett, R. D., Leemans, D., Cook, R., & Hobbs, P. J. (1997). Seasonality of the soil biota of grazed and ungrazed hill grasslands. Soil Biology and Biochemistry, 29(8), 1285-1294. https://doi.org/10.1016/S0038-0717(97)00019-9

Vancouver

Bardgett RD, Leemans D, Cook R, Hobbs PJ. Seasonality of the soil biota of grazed and ungrazed hill grasslands. Soil Biology and Biochemistry. 1997;29(8):1285-1294. https://doi.org/10.1016/S0038-0717(97)00019-9

Author

Bardgett, R. D. ; Leemans, David ; Cook, Roger ; Hobbs, Philip J. / Seasonality of the soil biota of grazed and ungrazed hill grasslands. In: Soil Biology and Biochemistry. 1997 ; Vol. 29, No. 8. pp. 1285-1294.

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@article{d7a975cbe1324c0abedd3e2877503835,
title = "Seasonality of the soil biota of grazed and ungrazed hill grasslands",
abstract = "Temporal and spatial measurements of soil microbial biomass, activity and community structure and nematode abundance were made in grazed and ungrazed Agrostis-Festuca and Nardus dominated hill grasslands, with brown earth and podzolic soils, respectively. Microbial biomass and activity were significantly higher in podzolic soils with Nardus dominated vegetation, than in brown earth soils with Agrostis-Festuca vegetation. Phospholipid fatty acid analysis (PLEA) revealed differences in microbial community structure between soils. The ratio of fungal-to-bacterial fatty acids was higher in the brown earth than in the podzolic soil, whereas the diversity (Shannon-Weaver index) of PLFAs was greater in the podzolic soil. A large proportion of the microbial biomass (50%) and activity (40-70%) was within the surface 0-5 cm soil, with reduced amounts at lower depths of 5-10 cm and 10-15 cm. Microbial biomass and activity and nematode abundance showed pronounced summer maxima and winter minima. The long-term removal of sheep grazing from both grassland types resulted in significant reductions in microbial biomass and activity in the surface soil. The abundance of active soil fungi, measured as the fungal fatty acid 18:2 omega 6, was significantly reduced by the removal of sheep grazing, as was the ratio of fungal-to-bacterial fatty acids. Bacterial fatty acids were unaffected by the removal of sheep grazing. Possible mechanisms for these changes are discussed. Numbers of soil nematodes were significantly lower in the ungrazed sites. The effects of removing sheep grazing on nematodes and microbial community structure were most pronounced in brown earth soils. Factors responsible for these changes are discussed. (C) 1997 Elsevier Science Ltd",
keywords = "direct extraction method, microbial biomass, Serengeti grasslands, resource quality, excluding sheep, nitrogen, communities, fertilizer, dynamics, decomposition",
author = "Bardgett, {R. D.} and David Leemans and Roger Cook and Hobbs, {Philip J.}",
year = "1997",
doi = "10.1016/S0038-0717(97)00019-9",
language = "English",
volume = "29",
pages = "1285--1294",
journal = "Soil Biology and Biochemistry",
issn = "0038-0717",
publisher = "Elsevier",
number = "8",

}

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TY - JOUR

T1 - Seasonality of the soil biota of grazed and ungrazed hill grasslands

AU - Bardgett, R. D.

AU - Leemans, David

AU - Cook, Roger

AU - Hobbs, Philip J.

PY - 1997

Y1 - 1997

N2 - Temporal and spatial measurements of soil microbial biomass, activity and community structure and nematode abundance were made in grazed and ungrazed Agrostis-Festuca and Nardus dominated hill grasslands, with brown earth and podzolic soils, respectively. Microbial biomass and activity were significantly higher in podzolic soils with Nardus dominated vegetation, than in brown earth soils with Agrostis-Festuca vegetation. Phospholipid fatty acid analysis (PLEA) revealed differences in microbial community structure between soils. The ratio of fungal-to-bacterial fatty acids was higher in the brown earth than in the podzolic soil, whereas the diversity (Shannon-Weaver index) of PLFAs was greater in the podzolic soil. A large proportion of the microbial biomass (50%) and activity (40-70%) was within the surface 0-5 cm soil, with reduced amounts at lower depths of 5-10 cm and 10-15 cm. Microbial biomass and activity and nematode abundance showed pronounced summer maxima and winter minima. The long-term removal of sheep grazing from both grassland types resulted in significant reductions in microbial biomass and activity in the surface soil. The abundance of active soil fungi, measured as the fungal fatty acid 18:2 omega 6, was significantly reduced by the removal of sheep grazing, as was the ratio of fungal-to-bacterial fatty acids. Bacterial fatty acids were unaffected by the removal of sheep grazing. Possible mechanisms for these changes are discussed. Numbers of soil nematodes were significantly lower in the ungrazed sites. The effects of removing sheep grazing on nematodes and microbial community structure were most pronounced in brown earth soils. Factors responsible for these changes are discussed. (C) 1997 Elsevier Science Ltd

AB - Temporal and spatial measurements of soil microbial biomass, activity and community structure and nematode abundance were made in grazed and ungrazed Agrostis-Festuca and Nardus dominated hill grasslands, with brown earth and podzolic soils, respectively. Microbial biomass and activity were significantly higher in podzolic soils with Nardus dominated vegetation, than in brown earth soils with Agrostis-Festuca vegetation. Phospholipid fatty acid analysis (PLEA) revealed differences in microbial community structure between soils. The ratio of fungal-to-bacterial fatty acids was higher in the brown earth than in the podzolic soil, whereas the diversity (Shannon-Weaver index) of PLFAs was greater in the podzolic soil. A large proportion of the microbial biomass (50%) and activity (40-70%) was within the surface 0-5 cm soil, with reduced amounts at lower depths of 5-10 cm and 10-15 cm. Microbial biomass and activity and nematode abundance showed pronounced summer maxima and winter minima. The long-term removal of sheep grazing from both grassland types resulted in significant reductions in microbial biomass and activity in the surface soil. The abundance of active soil fungi, measured as the fungal fatty acid 18:2 omega 6, was significantly reduced by the removal of sheep grazing, as was the ratio of fungal-to-bacterial fatty acids. Bacterial fatty acids were unaffected by the removal of sheep grazing. Possible mechanisms for these changes are discussed. Numbers of soil nematodes were significantly lower in the ungrazed sites. The effects of removing sheep grazing on nematodes and microbial community structure were most pronounced in brown earth soils. Factors responsible for these changes are discussed. (C) 1997 Elsevier Science Ltd

KW - direct extraction method

KW - microbial biomass

KW - Serengeti grasslands

KW - resource quality

KW - excluding sheep

KW - nitrogen

KW - communities

KW - fertilizer

KW - dynamics

KW - decomposition

UR - http://hdl.handle.net/2160/43187

U2 - 10.1016/S0038-0717(97)00019-9

DO - 10.1016/S0038-0717(97)00019-9

M3 - Article

VL - 29

SP - 1285

EP - 1294

JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

SN - 0038-0717

IS - 8

ER -

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