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Bioindicators of enhanced nitrogen deposition

被引：98
作者：
Pitcairn, CER
Fowler, D
Leith, ID
Sheppard, LJ
Sutton, MA
Kennedy, V
Okello, E
机构：
[1] Ctr Ecol & Hydrol, Penicuik EH26 0QB, Midlothian, Scotland
[2] Ctr Ecol & Hydrol, Grange Over Sands LA11 6JU, Cumbria, England
[3] Univ Newcastle Upon Tyne, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
来源：
ENVIRONMENTAL POLLUTION | 2003年 / 126卷 / 03期
关键词：
bioindicators; N deposition; Ellenberg N index; tissue N; amino acids;
D O I：
10.1016/S0269-7491(03)00248-3
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Increased deposition of atmospheric N largely from intensive agriculture is affecting biodiversity and the composition of natural and semi-natural vegetation in Europe. The value of species based bioindicators such as the Ellenberg N index and measurements of total tissue N and free amino acids in key plant species, is described with reference to a mixed woodland downwind of a livestock farm in the Scottish Borders, operated for over 20 years with a measured spatial gradient of ammonia concentration (29-1.5 mug m(-3)). All the indicators examined showed a relationship with N deposition and provided some indication of vegetation change. Total tissue N and arginine concentrations were most closely linked with ammonia concentrations and N deposition, with r(2) values of >0.97 and >0.78 respectively. (C) 2003 Elsevier Ltd. All rights reserved.
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页码：353 / 361
页数：9
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