Ob river floodplain mire

• Main Authors: Mironycheva-Tokareva Nina P., Vishnyakova Evgenia K., Kosykh Natalya P.
• Format: Text
• Language: unknown
• Published: Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования «Национальный исследовательский Томский государственный университет» 2014
• Subjects: floodplain mire; standing crop of phytomass; above-ground production; belowground production; decomposition; element losses; ob river; taiga
• Online Access: http://cyberleninka.ru/article/n/ob-river-floodplain-mire; http://cyberleninka.ru/article_covers/16939374.png

Mires occupy 40% of the Ob river floodplain within the taiga zone. Their forming started about 8 or 9 thousand years ago. Floodplain mires are highly productive ecosystems. Total standing crop is 4.0 or 6.5 t*ha-1. Standing crop of living phytomass takes 50-60% of the total standing crop. The peak of living phytomass (4.5 t*ha-1) is registered in sedgebrownmoss fen, the minimum (4.3 t*ha-1) is in pine-shrub ridge. Net primary production (NPP) is 2.7 t*ha-1*yr-1 in sedge-brownmoss fen, it decreases to 2.0 t*ha-1*yr-1 in pine-shrub ridge. Above-ground production (ANP) takes 7-10% of NPP, below-ground production (BNP) is 75%, brown mosses production is 15-18%. Mass losses of litter have changed from 25 to 85% in the last two years depending on fraction and species. Brownmoss litter losses about a quarter during one-year decomposition. Herewith element losses are following: 90% for Na and K, 73% for Mg and 3% for Ca.