Inorganic Nutrient ResearchCedar Creek LTER

CDR LTERHautier et al. 2015. Science

Cedar Creek LTER Synthesis• Effects of nutrients on NPP and Stability are

mediated by nutrient driven diversity loss. (Isbell et al. 2013. PNAS; Hautier et al. 2015. Science)

• Indirect diversity feedbacks lead to weakened nutrient effects over decadal time scales

(Isbell et al. 2013. PNAS)

Cross-site Nutrient Network and LTER Studies• Nutrient addition increases invasion and

reduces diversity, stability, and native abundance in grasslands worldwide (including 5 LTERs).

(Borer et al. Nature. 2014; Hautier et al. 2014.

Nature. Seabloom et al. Nature Comm.)

Isbell et al. 2013. PNAS

Recent Key Findings - Inorganic NutrientsCedar Creek LTER

CDR LTER

Nitrogen Increases Soil Respiration

Nitrogen decreasesSoil Respiration

KNZ

SGS

CDR

CDP-NE

CB-IA

Nitrogen Effects on Soil Respiration and Decomposition Charlotte Riggs

PhD Candidate with Sarah Hobbie Cedar Creek LTER

Nitrogen Increases Decomposition

Nitrogen decreasesDecompositionKNZ

SGSCDR

CDP-NECB-IA

Syntheses ideas - Inorganic NutrientsCedar Creek LTER

CDR LTER

• Meta-analyses of experiments at multiple LTERs to examine effects of nutrients on ecosystem diversity, stability, NPP, and invasion

• Link long-term LTER data sets with more spatially extensive observational and experimental data (GLEON, NutNet, etc) to examine effects of nutrients on ecosystems

• Examine colimitation of multiple nutrients on ecosystem functions

LTER Science Council 2015Instructions

Address question: “How is LTER advancing our understanding of the dynamics and controls of inorganic nutrients?” • 3 Slides, 5 minutes (no exceptions, no animations)

• Modify the following example template:

Slide 1: Brief orientation to your site’s research on inorganic nutrients

Slide 2: Share recent key results made possible by LTER

Slide 3: Explain relevance of research and how it might contribute to interesting, novel synthesis

We suggest that you might highlight results related to one of these major topic areas: 1. Greenhouse gas emissions / Ecosystem role in climate-change feedbacks

2. Hydrologic and marine transport, transformation, and retention of inorganic nutrients

3. Soil/sediment N, P, and organic C dynamics including coupled biogeochemical processes

4. Role of nutrients in controlling primary production and/or species composition/diversity

5. Other

Email powerpoint file to sherri.johnson@oregonstate.edu no later than 21 April 2015