id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-010620-4ghzpqct	Odasz, Ann Marie	Nitrate reductase activity in vegetation below an arctic bird cliff, Svalbard, Norway	2009-02-24		.txt	text/plain	4603	289	58	The aim of this study was to investigate the relationship between the distribution of plant species in bird cliff vegetation and the amount of soil nitrate available in the region of sea-bird guano deposition. In this study I used the maximally induced nitrate reductase activities of species to establish nitrogen indicator figures for arctic plants, thus extending the system of Ellenberg (1991) for central-European plants for different levels of nitrogen, using a scalar system from 1, environments poor in N, through 9, rich in N. Induced NRA values for the dominant species in each zone decreased significantly downslope: Cochlearia groenlandica: 4.35; Oxyria digyna: 6.06; Cerastium arcticum: 4.26; Saxifraga hieracifolia: 1.36; Saxifraga cespitosa: 1.23; and Dryas octopetala representative of the tundra sites: 1.10 (Table 2) .	./cache/cord-010620-4ghzpqct.txt	./txt/cord-010620-4ghzpqct.txt