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The sensitivity of peat-covered upland landscapes

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The sensitivity of peat-covered upland landscapes. / Bragg, Olivia; Tallis, J. H.

In: CATENA, Vol. 42, No. 2-4, 01.2001, p. 345-360.

Research output: Contribution to journalArticle

Harvard

Bragg, O & Tallis, JH 2001, 'The sensitivity of peat-covered upland landscapes' CATENA, vol 42, no. 2-4, pp. 345-360.

APA

Bragg, O., & Tallis, J. H. (2001). The sensitivity of peat-covered upland landscapes. CATENA, 42(2-4), 345-360doi: 10.1016/S0341-8162(00)00146-6

Vancouver

Bragg O, Tallis JH. The sensitivity of peat-covered upland landscapes. CATENA. 2001 Jan;42(2-4):345-360.

Author

Bragg, Olivia; Tallis, J. H. / The sensitivity of peat-covered upland landscapes.

In: CATENA, Vol. 42, No. 2-4, 01.2001, p. 345-360.

Research output: Contribution to journalArticle

Bibtex - Download

@article{ef50f1317d4f45c0a847fd70c29a214c,
title = "The sensitivity of peat-covered upland landscapes",
author = "Olivia Bragg and Tallis, {J. H.}",
note = "dc.publisher: Elsevier",
year = "2001",
volume = "42",
number = "2-4",
pages = "345--360",
journal = "CATENA",
issn = "0341-8162",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - The sensitivity of peat-covered upland landscapes

A1 - Bragg,Olivia

A1 - Tallis,J. H.

AU - Bragg,Olivia

AU - Tallis,J. H.

PY - 2001/1

Y1 - 2001/1

N2 - Ombrogenous mires, or bogs, are remarkable in that they are organic landforms built from living plants and their partially decayed remains (peat), together with large quantities of water derived directly from precipitation. In the uplands and northwest of the British Isles, they tend to dominate landscapes wherever the slope allows. The components of ombrogenous mires are highly sensitive to change, especially in hydrology. Their vegetation may alter in response to very small changes in water level and/or water chemistry, whereas the underlying peat may undergo total degradation on dewatering. The function of intact mire ecosystems incorporates mechanisms which tend to maintain stability when environmental conditions change; observation indicates, however, that the stability threshold may be crossed under some natural as well as some man-induced circumstances. Sensitivity is demonstrated by evidence from the plant remains preserved in the peat; from manipulation of management practices (particularly grazing and burning); from long-term (28–68 years) mapping of vegetation change; and from experimentation on the sensitivity of bog plants to components of air pollution. The ultimate manifestation of sensitivity is peat erosion, which is widespread in the uplands and may, in places, have been ongoing for several hundred years. It is concluded that we may anticipate heightened sensitivity to cultural perturbation of mire ecosystems during times of climate change, and thus that particular care in our approach to management of blanket peat landscapes is indicated at the present time.

AB - Ombrogenous mires, or bogs, are remarkable in that they are organic landforms built from living plants and their partially decayed remains (peat), together with large quantities of water derived directly from precipitation. In the uplands and northwest of the British Isles, they tend to dominate landscapes wherever the slope allows. The components of ombrogenous mires are highly sensitive to change, especially in hydrology. Their vegetation may alter in response to very small changes in water level and/or water chemistry, whereas the underlying peat may undergo total degradation on dewatering. The function of intact mire ecosystems incorporates mechanisms which tend to maintain stability when environmental conditions change; observation indicates, however, that the stability threshold may be crossed under some natural as well as some man-induced circumstances. Sensitivity is demonstrated by evidence from the plant remains preserved in the peat; from manipulation of management practices (particularly grazing and burning); from long-term (28–68 years) mapping of vegetation change; and from experimentation on the sensitivity of bog plants to components of air pollution. The ultimate manifestation of sensitivity is peat erosion, which is widespread in the uplands and may, in places, have been ongoing for several hundred years. It is concluded that we may anticipate heightened sensitivity to cultural perturbation of mire ecosystems during times of climate change, and thus that particular care in our approach to management of blanket peat landscapes is indicated at the present time.

KW - Blanket mire

KW - Bog

KW - Cultural influence

KW - Environmental change

KW - Peat erosion

KW - Ombrogenous mire

U2 - 10.1016/S0341-8162(00)00146-6

DO - 10.1016/S0341-8162(00)00146-6

M1 - Article

JO - CATENA

JF - CATENA

SN - 0341-8162

IS - 2-4

VL - 42

SP - 345

EP - 360

ER -

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