Phosphorus supply influences heathland responses to atmospheric nitrogen deposition

被引：32

作者：

Pilkington, M. G.

Caporn, S. J. M.

Carroll, J. A.

Cresswell, N.

Lee, J. A.

Emmett, B. A.

Bagchi, R.

机构：

[1] Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England

[2] Ctr Ecol & Hydrol Bangor, Bangor LL57 2UP, Gwynedd, Wales

[3] Manchester Metropolitan Univ, Dept Sci Biol, Manchester M1 5GD, Lancs, England

[4] Manchester Metropolitan Univ, Dept Environm & Geog Sci, Manchester M1 5GD, Lancs, England

[5] Manchester Metropolitan Univ, Dept Environm & Leisure Studies, Crewe CW1 5DU, Cheshire, England

来源：

ENVIRONMENTAL POLLUTION | 2007年 / 148卷 / 01期

基金：

英国自然环境研究理事会;

关键词：

mosses; lichens; Calluna; nitrogen limitation; phosphorus limitation;

D O I：

10.1016/j.envpol.2006.10.034

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

On an upland moor dominated by pioneer Calluna vulgaris and with an understorey of mosses and lichens, experimental plots were treated with factorial combinations of nitrogen (N) at +0 and +20 kg N ha(-1) yr(-1), and phosphorus (P) at +0 and +5 kg P ha(-1) yr(-1). Over the 4-year duration of the experiment, the cover of the Calluna canopy increased in density over time as part of normal phenological development. Moss cover increased initially in response to N addition but then remained static; increases in cover in response to P addition became stronger over time, eventually causing reductions in the cover of the dominant Calluna canopy. Lichen cover virtually disappeared within 4 years in plots receiving +20 kg N ha(-1) yr(-1) and also in separate plots receiving +10 kg N ha(-1) yr(-1), but this effect was reversed by the addition of P. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：191 / 200

页数：10

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