2012 LTER ASM - Biogeochemistry

Riparian Nitrogen Dynamics in Tropical Forest Groundwaters: A Challenge to Our Understanding of Near-Stream Ecosystem Function

rbrereton — Mon, 10 Sep 2012 19:03:31 +0000

Poster Number:

402

Presenter/Primary Author:

Richard Brereton

Riparian zones are widely understood to control the flux of water, nutrients, and carbon from terrestrial to aquatic ecosystems.

Student Poster:

Yes

Examining the mechanistic basis of summer nitrate peaks: a coupled biogeochemical and hydrological approach

jduncan — Wed, 05 Sep 2012 15:11:47 +0000

Poster Number:

389

Presenter/Primary Author:

Jonathan Duncan

Co-Authors:

Lawrence E. Band

Co-Authors:

Peter M. Groffman

Co-Authors:

Emily S. Bernhardt

Contrary to behavior predicted by the nitrogen saturation hypothesis, Pond Branch (the Baltimore Ecosystem Study forested reference watershed) exhibits peak nitrogen export during the growing seaso

Student Poster:

Yes

Nitrous Oxide Fluxes As a Function of Diffusion and Profile Concentrations in the Upper Meter of an Agricultural Soil

ishcherbak — Mon, 03 Sep 2012 18:00:16 +0000

Poster Number:

382

Presenter/Primary Author:

Iurii Shcherbak

Co-Authors:

G. Philip Robertson

Nitrous oxide (N₂O) production in arable soils is a major part of agricultural GHG emissions but not much is known about subsurface sources of N₂O.

Student Poster:

Yes

Detecting the sensitivity of desert herbaceous plant responses to co-occurring atmospheric compounds

ecook — Sun, 02 Sep 2012 04:41:56 +0000

Poster Number:

379

Presenter/Primary Author:

Elizabeth Cook

Co-Authors:

Sharon J Hall

Cities occupy a small land area globally, yet atmospheric compounds generated from human-dominated ecosystems have significant impacts on protected lands within and beyond urban boundaries. D

Student Poster:

Yes

Greenhouse gas emissions from a constructed wetland system in Phoenix, AZ

jramos1 — Sat, 01 Sep 2012 09:39:33 +0000

Poster Number:

365

Presenter/Primary Author:

Jorge Ramos

Co-Authors:

Eric Chapman

Co-Authors:

Nicholas A. Weller

Wetlands support ecological functions that result in valuable services to society, including the purification of water through processes such as denitrification, plant uptake, and soil retention.

Student Poster:

Yes

Remote sensing of canopy nitrogen as a window to the functioning of ecosystems

sollinger — Fri, 31 Aug 2012 21:02:36 +0000

Poster Number:

343

Presenter/Primary Author:

Scott Ollinger

Co-Authors:

L. Lepine

Co-Authors:

H. Wicklein

Co-Authors:

F. Sullivan

Co-Authors:

M. Martin

Co-Authors:

M.Day

How plants interact with sunlight is central to the existence of life and provides a window to the functioning of ecosystems. Although the basic properties of leaf spectra have been known for

Iron redox cycling: unexplored mechanisms for soil organic matter decomposition

wsilver — Fri, 31 Aug 2012 18:38:30 +0000

Poster Number:

341

Presenter/Primary Author:

Whendee Silver

Co-Authors:

Steven Hall

Iron (Fe) oxide minerals have long been known to protect soil organic carbon (C) from microbial decomposition, especially in humid tropical soils abundant in both Fe and C.

Regional Consequences of Changing Climate-Disturbance Interactions for the Resilience of Alaska's Boreal Forest

jdowning — Fri, 31 Aug 2012 17:12:03 +0000

Poster Number:

337

Presenter/Primary Author:

Roger Ruess

Rapid environmental change in interior Alaska over the past century has altered the interrelationships among physical, biological and social drivers of the regional system.

Microbial mat nutrient storage in the McMurdo Dry Valleys, Antarctica

tkohler — Thu, 30 Aug 2012 15:30:05 +0000

Poster Number:

321

Presenter/Primary Author:

Tyler Kohler

Co-Authors:

Diane McKnight

Microbial mats from Antarctic Dry Valley streams are important nutrient and carbon subsidies to Dry Valley lakes and soils, either transported by wind or flow.

Student Poster:

Yes

Mechanisms of soil C storage in bioenergy cropping systems

ltiemann — Thu, 30 Aug 2012 02:24:56 +0000

Poster Number:

318

Presenter/Primary Author:

Lisa Tiemann

Co-Authors:

Stuart Grandy

Soils often accrue carbon (C) when land is converted from grain based row crops such as corn to perennial bioenergy crops.