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Kotowska, M. &amp; Werner, F.A. (2013): <b>Environmental controls over methane emissions from bromeliad phytotelmata: The role of phosphorus and nitrogen availability, temperature, and water content</b>. <i>GLOBAL BIOGEOCHEMICAL CYCLES</i> <b>27</b>, 1-8.

Resource Description

Title: Environmental controls over methane emissions from bromeliad phytotelmata: The role of phosphorus and nitrogen availability, temperature, and water content
FOR816dw ID: 1317
Publication Date: 2013-11-13
License and Usage Rights: PAK 823-825 data user agreement. (www.tropicalmountainforest.org/dataagreementp3.do)
Resource Owner(s):
Individual: Martyna Kotowska
Contact:
Individual: Florian A. Werner
Contact:
Abstract:
Tank bromeliads are common epiphytic plants throughout neotropical forests that store<br/> signi?cant amounts of water in phytotelmata (tanks) formed by highly modi?ed leafs.<br/> Methanogenic archaea in these tanks have recently been identi?ed as a signi?cant source of<br/> atmospheric methane. We address the effects of environmental drivers (temperature, tank<br/> water content, sodium phosphate [P], and urea [N] addition) on methane production in<br/> anaerobically incubated bromeliad slurry and emissions from intact bromeliad tanks in<br/> montane Ecuador. N addition ? 1 mg g 1 had a signi?cantly positive effect on headspace<br/> methane concentrations in incubation jars while P addition did not affect methane<br/> production at any dosage (? 1 mg g 1 ). Tank bromeliads (Tillandsia complanata) cultivated<br/> in situ showed signi?cantly increased ef?uxes of methane in response to the addition of<br/> 26 mg N addition per tank but not to lower dosage of N or any dosage of P (? 5.2 mg plant 1 ).<br/> There was no signi?cant interaction between N and P addition. The brevity of the<br/> stimulatory effect of N addition on plant methane ef?uxes (1–2 days) points at N<br/> competition by other microorganisms or bromeliads. Methane ef?ux from plants closely<br/> followed within-day temperature ?uctuations over 24 h cycles, yet the dependency of<br/> temperature was not exponential as typical for terrestrial wetlands but instead linear. In<br/> simulated drought, methane emission from bromeliad tanks was maintained with minimum<br/> amounts of water and regained after a short lag phase of approximately 24 h. Our results<br/> suggest that methanogens in bromeliads are primarily limited by N and that direct effects of<br/> global change (increasing temperature and seasonality, remote fertilization) on bromeliad<br/> methane emissions are of moderate scale.
Keywords:
| nutrients | gas emission | NUMEX | N-cycle | nitrogen | Gas exchange | phosphorus | nutrient manipulation | nutrient limitation | phosphorus availability | nutrient cycle | methane |
Literature type specific fields:
ARTICLE
Journal: GLOBAL BIOGEOCHEMICAL CYCLES
Volume: 27
Page Range: 1-8
Metadata Provider:
Individual: Florian A. Werner
Contact:
Online Distribution:
Download File: http://www.lcrs.de/publications.do?citid=1317


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