Zero methane emission bogs extreme rhizosphere oxygenation by cushion plants in Patagonia

Zero methane emission bogs : extreme rhizosphere oxygenation by cushion plants in Patagonia

© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 190(2011), 2 vom: 01. Apr., Seite 398-408
1. Verfasser: Fritz, Christian (VerfasserIn)
Weitere Verfasser: Pancotto, Veronica A, Elzenga, Josephus T M, Visser, Eric J W, Grootjans, Ab P, Pol, Arjan, Iturraspe, Rodolfo, Roelofs, Jan G M, Smolders, Alfons J P
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Water 059QF0KO0R Methane OP0UW79H66 Oxygen S88TT14065
Beschreibung
Zusammenfassung:© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.
• Vascular wetland plants may substantially increase methane emissions by producing root exudates and easily degradable litter, and by providing a low-resistance diffusion pathway via their aerenchyma. However, model studies have indicated that vascular plants can reduce methane emission when soil oxygen demand is exceeded by oxygen released from roots. Here, we tested whether these conditions occur in bogs dominated by cushion plants. • Root-methane interactions were studied by comparing methane emissions, stock and oxygen availability in depth profiles below lawns of either cushion plants or Sphagnum mosses in Patagonia. • Cushion plants, Astelia pumila and Donatia fascicularis, formed extensive root systems up to 120 cm in depth. The cold soil (< 10°C) and highly decomposed peat resulted in low microbial activity and oxygen consumption. In cushion plant lawns, high soil oxygen coincided with high root densities, but methane emissions were absent. In Sphagnum lawns, methane emissions were substantial. High methane concentrations were only found in soils without cushion plant roots. • This first methane study in Patagonian bog vegetation reveals lower emissions than expected. We conclude that cushion plants are capable of reducing methane emission on an ecosystem scale by thorough soil and methane oxidation
Beschreibung:Date Completed 18.07.2011
Date Revised 30.09.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/j.1469-8137.2010.03604.x