Imaging Spectrometry for Earth Remote Sensing

a b s t r a c tTo investigate the mechanisms and potential for the remote sensing of phenanthrene-induced vegetation stress, we measured field canopy spectra, and associated plant and soil parameters in the field controlled experiment in the Yellow River Delta of China. Two widely distributed plant communities, separately dominated by reed (Phragmites australis) and glaucous seepweed (Suaeda salsa), were treated with different doses of phenanthrene. The canopy spectral changes of plant community resulted from the decreases of biomass and foliar projective coverage, while leaf photosynthetic pigment concentrations showed no significance difference among treatments. The spectral response to phenanthrene included a flattened red edge, with decreased first derivative of reflectance. The red edge slope and area consistently responded to phenanthrene, showing a strong relationship with aboveground biomass, coverage and canopy pigments density. These results suggest the potential of remote sensing and the importance of field validation to correctly interpret the causes of the spectral changes.

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“…Two peaks at ca. 700 and 725 nm were first identified (Goetz et al, 1985). Three peaks were also found by different researchers .…”

Section: Mechanisms and Potential For Monitoring Plant Stress Using Tmentioning

confidence: 78%

“…Hyperspectral sensors detect signals of hundreds of contiguous spectral bands < 10 nm within the visible and near-infrared spectrum (Goetz et al, 1985;Yi et al, 2007). Therefore, hyperspectral sensors can collect information that traditional multispectral sensors cannot.…”

Section: Introductionmentioning

confidence: 99%

Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Zhu

Chen

Wang

et al. 2014

Marine Pollution Bulletin

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“…In developing a strategy to explore for ancient hydrothermal deposits on Mars, it is useful to consider the methods developed by explorationists who explore for economic mineral deposits on the Earth [Huntington, 1996;Horn, 1996]. Because of their characteristic mineralogy, hydrothermal deposits may often be detected using high-resolution remote-sensing methods [Goetz et al, 1983[Goetz et al, , 1985 In subaerial thermal springs, microbial species are arrayed along thermal gradients according to their temperature tolerances, creating characteristic biomes that are easily discerned by variations in mat pigmentation and structure (Plate la). Springs deliver nutrients and reduced compounds to the surface environment that are capable of sustaining high rates of biological productivity.…”

Section: Surface Hydrothermal Systemsmentioning

confidence: 99%

Exploring for a record of ancient Martian life

Farmer¹,

Marais²

1999

J. Geophys. Res.

297

222

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Abstract. The immediate task facing exopaleontology is to define a strategy to explore Mars for a fossil record during the decade-long exploration program that lies ahead. Consideration of the quality of paleontological information preserved under different geological conditions is important if we are to develop a strategy with broad applicability. The preservation of microbial fossils is strongly influenced by the physical, chemical, and biological factors of the environment which, acting together, determine the types of information that will be captured and retained in the rock record. In detrital sedimentary systems, preservation is favored by rapid burial in fine-grained, clay-rich sediments. In chemical sedimentary systems, preservation is enhanced by rapid entombment in finegrained chemical precipitates. For long-term preservation, host rocks must be composed of stable minerals that are resistant to chemical weathering and that form an impermeable matrix and closed chemical system to protect biosignatures from alteration during subsequent diagenesis or metamorphism. In this context, host rocks composed of highly ordered, chemically stable mineral phases, like silica (e.g., cherts) or phosphate (e.g., phosphorites), are especially favored. Such lithologies tend to have very long crustal residence times and, along with carbonates and shales, are the most common host rocks for the Precambrian microfossil record on Earth. Although we make the defensible assumption that Mars was more like the Earth early in its history, clearly, the geological and historical differences between the two planets are many. Such differences must be carefully considered when adapting an Earth-based strategy to Mars. IntroductionThe present emphasis in Mars exploration lies in the search for a fossil record [Klein and Farmer, 1995]. On Earth the long-term preservation of fossils occurs under a fairly narrow range of geological conditions [Knoll, 1984; Allison and Briggs, 1991a; Allison and Pye, 1994]. Favored environments share many basic physical and compositional characteristics that serve to guide the search for a microbial fossil record, whether in ancient stratigraphic sequences on Earth or, with appropriate adaptation, on other planetary surfaces like Mars. Because the basic conceptual framework and methodology required for paleontological exploration of other planetary bodies differ substantially from the search for extant life (embraced by the traditional discipline of exobiology), we refer to the former activity as "exopaleontology" [Farmer, 1995].In this paper we seek to create a historical perspective about the Earth's biosphere that will serve as a practical context for Mars exploration. The early history of the terrestrial biosphere and the factors that control life's limits are important constraints for assessing the probability that Mars developed life. Such constraints also provide a focus for the identification of potential habitable zones (past or present) on Mars.At the heart our strategy for Mars exopaleontology ...

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“…As we have mentioned before, originally was hyperspectral imaging developed for remote sensing, non-biological applications (Goetz et al, 1985). However, in the last years, hyperspectral imaging has been widely accepted as a non-destructive, rapid and safe method of qualitative analysis of plants as well as of a wide spectrum of food products.…”

Section: Hyperspectral Imaging and Its Utilization In Crop Phenotypinmentioning

confidence: 99%

Applying hyperspectral imaging to explore natural plant diversity towards improving salt stress tolerance

Sytar

Brestič

Živčák

et al. 2017

Science of The Total Environment

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• Salinity represents an abiotic stress constraint affecting growth and productivity of plants • Better solutions is to improve the level of salt resistance using natural genetic variability within crop species • Phenomic methodology employing different non-invasive imaging systems for detecting quantitative and qualitative changes caused by salt stress at the whole plant and canopy level. Hyperspectral imaging techniques provide unique opportunities for fast and reliable evaluation of numerous characteristics associated both with various structural, biochemical and physiological traits • Salt-soil-plant interaction and sustainable coastal agriculture need powerful phenotyping tools Salinity represents an abiotic stress constraint affecting growth and productivity of plants in many regions of the world. One of the possible solutions is to improve the level of salt resistance using natural genetic variability within crop species. In the context of recent knowledge on salt stress effects and mechanisms of salt tolerance, this review present useful phenomic approach employing different non-invasive imaging systems for detection of quantitative and qualitative changes caused by salt stress at the plant and canopy level. The focus is put on hyperspectral imaging technique, which provides unique opportunities for fast and reliable estimate of numerous characteristics associated both with various structural, biochemical Science of the Total Environment 578 (2017) 90-99 ⁎ Corresponding authors at:

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Imaging Spectrometry for Earth Remote Sensing

Cited by 1,626 publications

References 11 publications

Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Monitoring plant response to phenanthrene using the red edge of canopy hyperspectral reflectance

Exploring for a record of ancient Martian life

Applying hyperspectral imaging to explore natural plant diversity towards improving salt stress tolerance

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