Search Results - "Skidmore, A. K."

Narrow band vegetation indices overcome the saturation problem in biomass estimation by Mutanga, O., Skidmore, A. K.

“…Remotely sensed vegetation indices such as NDVI, computed using the red and near infrared bands have been used to estimate pasture biomass. These indices are…”
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Allometric equations for estimating the above-ground biomass in tropical lowland Dipterocarp forests by Basuki, T.M., van Laake, P.E., Skidmore, A.K., Hussin, Y.A.

“…Allometric equations can be used to estimate the biomass and carbon stock of forests. However, so far the equations for Dipterocarp forests have not been…”
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Spectral discrimination of vegetation types in a coastal wetland by Schmidt, K.S., Skidmore, A.K.

“…Remote sensing is an important tool for mapping and monitoring vegetation. Advances in sensor technology continually improve the information content of imagery…”
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Predicting in situ pasture quality in the Kruger National Park, South Africa, using continuum-removed absorption features by Mutanga, O, Skidmore, A.K, Prins, H.H.T

“…The remote sensing of pasture quality as determined by nitrogen, phosphorous, potassium, calcium and magnesium concentration is critical for a better…”
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Non-linear partial least square regression increases the estimation accuracy of grass nitrogen and phosphorus using in situ hyperspectral and environmental data by Ramoelo, A., Skidmore, A.K., Cho, M.A., Mathieu, R., Heitkönig, I.M.A., Dudeni-Tlhone, N., Schlerf, M., Prins, H.H.T.

“…Grass nitrogen (N) and phosphorus (P) concentrations are direct indicators of rangeland quality and provide imperative information for sound management of…”
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Comparing accuracy assessments to infer superiority of image classification methods by de Leeuw, J., Jia, H., Yang, L., Liu, X., Schmidt, K., Skidmore, A. K.

“…The z-test based on the Kappa statistic is commonly used to infer superiority of one map production method over another. Typically the same reference data set…”
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Spatial autocorrelation and the scaling of species-environment relationships by de Knegt, H. J, van Langevelde, F, Coughenour, M. B, Skidmore, A. K, de Boer, W. F, Heitkönig, I. M. A, Knox, N. M, Slotow, R, van der Waal, C, Prins, H. H. T

“…Issues of residual spatial autocorrelation (RSA) and spatial scale are critical to the study of species-environment relationships, because RSA invalidates many…”
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Integrating imaging spectroscopy and neural networks to map grass quality in the Kruger National Park, South Africa by Mutanga, O, Skidmore, A.K

“…A new integrated approach, involving continuum-removed absorption features, the red edge position and neural networks, is developed and applied to map grass…”
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Estimating tropical pasture quality at canopy level using band depth analysis with continuum removal in the visible domain by Mutanga, O., Skidmore, A. K., Kumar, L., Ferwerda, J.

“…Pasture quality, expressed as a percentage of total digestible nutrients (nitrogen, potassium, phosphorous, calcium and magnesium), is a major factor…”
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Towards red-edge positions less sensitive to canopy biophysical parameters for leaf chlorophyll estimation using properties optique spectrales des feuilles (PROSPECT) and scattering by arbitrarily inclined leaves (SAILH) simulated data by Cho, M. A., Skidmore, A. K., Atzberger, C.

“…Several methods for extracting the chlorophyll sensitive red-edge position (REP) from hyperspectral data are reported in literature. This study is a…”
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Satellite-derived vegetation indices contribute significantly to the prediction of epiphyllous liverworts by Jiang, Yanbin, Wang, Tiejun, de Bie, C.A.J.M., Skidmore, A.K., Liu, Xuehua, Song, Shanshan, Zhang, Li, Wang, Jian, Shao, Xiaoming

“…•The spatial distribution of epiphyllous liverworts in China is predicted.•Six core distribution areas of epiphyllous liverworts across China are found.•The…”
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Identifying habitat patches and potential ecological corridors for remnant Asiatic black bear ( Ursus thibetanus japonicus) populations in Japan by Doko, Tomoko, Fukui, Hiromichi, Kooiman, Andre, Toxopeus, A.G., Ichinose, Tomohiro, Chen, Wenbo, Skidmore, A.K.

“…The Japanese National Biodiversity Strategy 2010 calls for the creation of ecological networks as a biodiversity conservation policy. However, there is an…”
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Hyperspectral predictors for monitoring biomass production in Mediterranean mountain grasslands: Majella National Park, Italy by Cho, M. A., Skidmore, A. K.

“…The research objective was to determine robust hyperspectral predictors for monitoring grass/herb biomass production on a yearly basis in the Majella National…”
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The effects of high soil CO2 concentrations on leaf reflectance of maize plants by Noomen, M. F., Skidmore, A. K.

“…Carbon dioxide gas at higher concentrations is known to kill vegetation and can also lead to asphyxiation in humans and animals. The objective of this study is…”
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A ground-validated NDVI dataset for monitoring vegetation dynamics and mapping phenology in Fennoscandia and the Kola peninsula by Beck, P. S. A., Jönsson, P., Høgda, K.-A., Karlsen, S. R., Eklundh, L., Skidmore, A. K.

“…An NDVI dataset covering Fennoscandia and the Kola peninsula was created for vegetation and climate studies, using Moderate Resolution Imaging…”
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Hyperspectral indices for detecting changes in canopy reflectance as a result of underground natural gas leakage by Noomen, M. F., Smith, K. L., Colls, J. J., Steven, M. D., Skidmore, A. K., Van Der Meer, F. D.

“…Natural gas leakage from underground pipelines is known to affect vegetation adversely, probably by displacement of the soil oxygen needed for respiration…”
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Impact of solid shrimp pond waste materials on mangrove growth and mortality: a case study from Pak Phanang, Thailand by Vaiphasa, C, de Boer, W. F, Skidmore, A. K, Panitchart, S, Vaiphasa, T, Bamrongrugsa, N, Santitamnont, P

“…One of the most serious threats to tropical mangrove ecosystems caused by shrimp farming activities is the poor management of pond waste materials. We…”
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Diet selection of African elephant over time shows changing optimization currency by Pretorius, Y., Stigter, J. D., de Boer, W. F., van Wieren, S. E., de Jong, C. B., de Knegt, H. J., Grant, C. C., Heitkönig, I., Knox, N., Kohi, E., Mwakiwa, E., Peel, M. J. S., Skidmore, A. K., Slotow, R., van der Waal, C., van Langevelde, F., Prins, H. H. T.

“…Multiple factors determine diet selection of herbivores. However, in many diet studies selection of single nutrients is studied or optimization models are…”
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Interannual variability of NDVI and species richness in Kenya by Oindo, B. O., Skidmore, A. K.

“…Ecologists have long recognized the spatial variability of species richness. In an attempt to identify the factors responsible for this variability, ecologists…”
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Hyper-temporal remote sensing helps in relating epiphyllous liverworts and evergreen forests by Jiang, Yanbin, de Bie, C.A.J.M., Wang, Tiejun, Skidmore, A.K., Liu, Xuehua, Song, Shanshan, Shao, Xiaoming

“…Question: Is there, at the macro-habitat scale, a relationship between the fraction of evergreen forests and the presence probability of epiphyllous…”
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