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A narrow-waveband spectral index that tracks diurnal changes in photosynthetic efficiency
Abstract We present a new “physiological reflectance index” (PRI) isolated from narrow waveband spectral measurements of sunflower canopies. This index correlates with the epoxidation state of the… Expand
Estimation of plant water concentration by the reflectance Water Index WI (R900/R970)
Abstract Water Index WI (R900/R970) was used for the estimation of plant water concentration (PWC) by ground-based, reflectance measurements. Reflectance and PWC were measured for adult plants… Expand
Responses of terrestrial ecosystems to temperature and precipitation change: a meta-analysis of experimental manipulation.
Global mean temperature is predicted to increase by 2–71C and precipitation to change across the globe by the end of this century. To quantify climate effects on ecosystem processes, a number of… Expand
Running to stand still: adaptation and the response of plants to rapid climate change
Climate is a potent selective force in natural populations, yet the importance of adaptation in the response of plant species to past climate change has been questioned. As many species are unlikely… Expand
Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability.
Ratios of nitrogen (N) isotopes in leaves could elucidate underlying patterns of N cycling across ecological gradients. To better understand global-scale patterns of N cycling, we compiled data on… Expand
Assessment of photosynthetic radiation‐use efficiency with spectral reflectance
Reflectance changes at 531 nm, associated with the zeaxanthin-antheraxanthin-violaxanthin interconversion and the related thylakoid energization, are widespread among plant species. We evaluated an… Expand
Reflectance indices associated with physiological changes in nitrogen- and water-limited sunflower leaves☆
Abstract We followed diurnal and seasonal changes in physiology and spectral reflectance of leaves throughout the canopies of sunflower plants grown in control, nitrogen (N)-limited, and… Expand
Relationships Between NDVI, Canopy Structure, and Photosynthesis in Three Californian Vegetation Types
In a range of plant species from three Californian vegetation types, we examined the widely used "normalized difference vegetation index" (NDVI) and "simple ratio" (SR) as indicators of canopy… Expand
Changed plant and animal life cycles from 1952 to 2000 in the Mediterranean region
The available data on climate over the past century indicate that the earth is warming. Important biological effects, including changes of plant and animal life cycle events, have already been… Expand
Remote sensing of nitrogen and lignin in Mediterranean vegetation from AVIRIS data: Decomposing biochemical from structural signals
Remote sensing estimates of vegetation nitrogen (N) and lignin concentration are central to assess ecosystem processes such as growth and decomposition. Although remote sensing techniques have been… Expand