[LTER-luq] Final litterfall graph (until we add palms) Can stable carbon isotopes be run on oven dried leaf litter? or does it have to be air dried?

[McDowell, Bill]

We should also try to get a survey of water isotopes in the streams as well as any rainfall that is collected.  18O and deuterium. They respond to the degree of evaporation that the water has undergone. Bill

William H. McDowell
Professor of Environmental Science and Presidential Chair
Department of Natural Resources and the Environment, University of New Hampshire
Director, NH Water Resources Research Center (http://wrrc.unh.edu/)
(603) 862-2249 bill.mcdowell at unh.edu<mailto:bill.mcdowell at unh.edu>

From: luq [mailto:luq-bounces at lists.lternet.edu] On Behalf Of Deborah J Lodge
Sent: Monday, August 10, 2015 6:28 AM
To: Xiaoming Zou <xzou2011 at gmail.com>
Cc: LUQ-LTER <luq at lternet.edu>
Subject: Re: [LTER-luq] Final litterfall graph (until we add palms) Can stable carbon isotopes be run on oven dried leaf litter? or does it have to be air dried?

Yes, from what I understand, 13C could be informative.

BUT, I know for soils they can't be oven dried for stable carbon isotope analyses - what about leaf litter?

Jean
On Aug 10, 2015, at 12:16 AM, Xiaoming Zou <xzou2011 at gmail.com<mailto:xzou2011 at gmail.com>> wrote:


I believe that the key measurement missions is water evapotranspiration rate. Along with it is the stomatal cell closure dynamics.  Another variable is 13C of plant leaves. --Xiaoming

On Thu, Aug 6, 2015 at 11:56 AM, Jess Zimmerman <jesskz at ites.upr.edu<mailto:jesskz at ites.upr.edu>> wrote:
Hi All,

To contribute to our discussions going on, I pass along the litterfall graph that Sarah prepared that compares litterfall YTD vs. the averages since the CTE started in 2002.  There was an immense amount during one single fortnight in May.  It was so much that it took all the staff to collect it all.  I spoke to John Bithorn yesterday and he told me he was many species, not just a few, that contributed to the peak.  We'll keep you posted as more data are added.  We are also analyzing the data set on palm litter, too.

jess

Jess K. Zimmerman
Professor
Lead PI, Luquillo LTER Program
Department Environmental Sciences
University of Puerto Rico - Rio Piedras
Rio Piedras, Puerto Rico

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---------- Forwarded message ----------
From: Sarah Stankavich <sarahstankavich at gmail.com<mailto:sarahstankavich at gmail.com>>
Date: Wed, Aug 5, 2015 at 1:17 PM
Subject: Final litterfall graph (until we add palms)
To: Jess Zimmerman <jesskz at ites.upr.edu<mailto:jesskz at ites.upr.edu>>

Here you go

--
Sarah Stankavich
LUQ-LTER Coordinator
El Verde Field Station
787-222-7756<tel:787-222-7756>


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