Response of NDVI, biomass, and ecosystem gas exchange to long-term warming and fertilization in wet sedge tundra

Publication Status is "Submitted" Or "In Press: 
Yes
LDEO Publication: 
Yes
Publication Type: 
Year of Publication: 
2003
Journal Title: 
Oecologia
Journal Date: 
May
Volume: 
135
Issue: 
3
Pages: 
414-421
ISBN Number: 
0029-8549
Accession Number: 
ISI:000183198000013
LDEO Publication Number: 
6425
Abstract: 

This study explores the relationship between the normalized difference vegetation index (NDVI), aboveground plant biomass, and ecosystem C fluxes including gross ecosystem production (GEP), ecosystem respiration (ER) and net ecosystem production. We measured NDVI across long-term experimental treatments in wet sedge tundra at the Toolik Lake LTER site, in northern Alaska. Over 13 years, N and P were applied in factorial experiments (N, P and N + P), air temperature was increased using greenhouses with and without N + P fertilizer, and light intensity (photosynthetically active photon flux density) was reduced by 50% using shade cloth. Within each treatment plot, NDVI, aboveground biomass and whole-system CO,! flux measurements were made at the same sampling points during the peak-growing season of 2001. We, found that across all treatments, NDVI is correlated with aboveground biomass (r(2)=0.84), GEP (r(2)=0.75) and ER (r(2)=0.71), providing a basis for linking remotely sensed NDVI to aboveground biomass and ecosystem carbon flux.

Notes: 

684GXTimes Cited:22Cited References Count:54

DOI: 
DOI 10.1007/s00442-003-1198-3