TAILIEUCHUNG - Ratio-based vegetation indices for biomass estimation depending on grassland characteristics

Aboveground biomass (AGB) is one of the key indicators of aboveground net primary productivity (ANPP). The aim of this study is to demonstrate the potential of hyperspectral remote sensing techniques to predict AGB in grasslands. In order to reach this goal, biomass properties with different ecological features and altitudes of 550 m, 1200 m, and 1400 m above sea level were investigated. Twenty-one biomass samples and hyperspectral measurements were collected from each region and a total of 63 samples were analyzed. Linear and nonlinear regression models were generated to analyze the relationships between biomass and hyperspectral vegetation indices (VIs). The results showed strong relationships between VIs and biomass variations. | Turkish Journal of Botany Turk J Bot 2019 43 619-633 http botany TÜBİTAK Research Article doi bot-1902-50 Ratio-based vegetation indices for biomass estimation depending on grassland characteristics 1 2 Ahmet KARAKOÇ Murat KARABULUT 1 Department of Geography Institute of Social Science Kahramanmaraş Sütçü İmam University Kahramanmaraş Turkey 2 Department of Geography Faculty of Art and Sciences Kahramanmaraş Sütçü İmam University Kahramanmaraş Turkey Received Accepted Published Online Final Version Abstract Aboveground biomass AGB is one of the key indicators of aboveground net primary productivity ANPP . The aim of this study is to demonstrate the potential of hyperspectral remote sensing techniques to predict AGB in grasslands. In order to reach this goal biomass properties with different ecological features and altitudes of 550 m 1200 m and 1400 m above sea level were investigated. Twenty-one biomass samples and hyperspectral measurements were collected from each region and a total of 63 samples were analyzed. Linear and nonlinear regression models were generated to analyze the relationships between biomass and hyperspectral vegetation indices VIs . The results showed strong relationships between VIs and biomass variations. However dense biomass samples indicated weaker relationships with VIs due to saturation phenomena. Findings based on the measured data showed that AGB except dense biomass can be estimated with high accuracy using hyperspectral vegetation indices. Key words Biomass hyperspectral remote sensing ratio-based vegetation indices grasslands Kahramanmaraş 1. Introduction characterization of the types and conditions of grasslands Grasslands are geographically unique and ecologically are required for the sustainable use of such resources and and agroeconomically significant covering roughly 25 for better understanding the impact of changes in these of the terrestrial landscape of the .

• Sinh học
• Journal of Botany
• Hyperspectral remote sensing
• Ratio based vegetation indices
• Aboveground biomass
• Nonlinear regression models
• Saturation phenomena
• Ricinus communis
• Glycine max
• Fatty acid biosynthesis
• Comparative proteomics
• Plant seed oil
• Aluminum stress
• DNA methylation
• iPBS profile
• Genomic instability
• Reactive oxygen species
• Helianthus annuus
• Molecular marker analysis
• Simple sequence repeats
• Orobanche cumana
• Genetic structure
• Water deficit stress
• Trifolium repens
• Exogenous application
• Oxidative defense system
• Chicken feather
• Protein hydrolysate
• Aqueous solutions
• Nonproteinogenic amino acids
• Glutathione peroxidase
• Białowieża Forest
• Hay meadow
• Long term study
• Mowing regime
• Floristic composition
• Ecological status
• Indication system
• Trophic weight
• Aquatic ecosystems
• Weighted average regression
• Molecular analyses
• Stalked puffballs
• Fungal DNA barcode
• Nuclear ribosomal DNA
• Scanning electron microscopes
• Astragalus devesae
• Chemical scarification
• Endangered species
• In situ and ex situ conservation
• Population reinforcement
• Seed germination
• Onopordum nezaketianum
• Ornamentation microreticulate
• Palynological features
• Sparsely arachnoid pubescent
• New record
• High mountain lakes
• Artabel Lakes Nature Park
• Chlamydomonas pertusa Chodat
• Coenochloris pyrenoidosa Korshikov
• Chalcone isomerase
• Gene cloning
• Sequence analysis
• Flavonoid biosynthesis
• Cerebral blood flow
• G Quadruplex
• Plant genetics
• Intron mediated enhancement
• Double stranded helix
• Biological significance
• Arabidopsis thaliana
• Boron toxicity
• Posttranscriptional regulation
• Cell wall modification
• Ethylene metabolisms
• Characterizing ethylene pathway genes
• Citrus reticulata
• Fruit pulp development
• Postharvest storage
• Khasi mandarin fruit
• Panicum miliaceum L
• Genetic diversity
• SSR markers
• Grain yield stability
• Panicle and grain morphology
• Brachypodium distachyon
• B hybridum
• Flow cytometry
• Genome size variation
• Model grass genus
• Salt tolerance
• Essential oil productivity
• Ocimum basilicum L
• Hydroponic system
• Intracellular signaling cascades
• Mine site
• Abiotic stress
• Hyperaccumulator plant species
• Nonmine site plants
• Stressful environments
• Asymmetry index
• Somatic chromosome
• Asymmetrical karyotype
• Intrachromosomal asymmetry
• Chromosome morphology
• Endemic species
• Ecological niche modeling
• Local endemic chasmophyte
• Geological formation
• Ecosystem processes
• Bryophyte flora
• Morphological characters
• Anatomic characters
• Reproductive forms
• Eastern Black Sea Region
• Macrostructural properties
• Smaller fruit bodies
• Accompanying bryophytes
• Calcium signaling
• Signal transduction
• Adverse environmental stimuli
• CBL–CIPK signaling pathways
• Biomass production
• GA20 oxidase gene
• Melia azedarach L
• Xylem cells