Browsing Natural and Agricultural Sciences by Author "Naidoo, Laven"

Browsing Natural and Agricultural Sciences by Author "Naidoo, Laven"

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  • Aboveground biomass density models for NASA’s global ecosystem dynamics investigation (GEDI) lidar mission 
    Duncanson, Laura; Kellner, James R.; Armston, John; Dubayah, Ralph; Minor, David M.; Hancock, Steven; Healey, Sean P.; Patterson, Paul L.; Saarela, Svetlana; Marselis, Suzanne; Silva, Carlos E.; Bruening, Jamis; Goetz, Scott J.; Tang, Hao; Hofton, Michelle; Blair, Bryan; Luthcke, Scott; Fatoyinbo, Lola; Abernethy, Katharine; Alonso, Alfonso; Andersen, Hans-Erik; Aplin, Paul; Baker, Timothy R.; Barbier, Nicolas; Bastin, Jean Francois; Biber, Peter; Boeckx, Pascal; Bogaert, Jan; Boschetti, Luigi; Boucher, Peter Brehm; Boyd, Doreen S.; Burslem, David F.R.P.; Calvo-Rodriguez, Sofia; Chave, Jerome; Chazdon, Robin L.; Clark, David B.; Clark, Deborah A.; Cohen, Warren B.; Coomes, David A.; Corona, Piermaria; Cushman, K.C.; Cutler, Mark E.J.; Dalling, James W.; Dalponte, Michele; Dash, Jonathan; De-Miguel, Sergio; Deng, Songqiu; Ellis, Peter Woods; Erasmus, Barend Frederik Nel; Fekety, Patrick A.; Fernandez-Landa, Alfredo; Ferraz, Antonio; Fischer, Rico; Fisher, Adrian G.; Garcia-Abril, Antonio; Gobakken, Terje; Hacker, Jorg M.; Heurich, Marco; Hill, Ross A.; Hopkinson, Chris; Huang, Huabing; Hubbell, Stephen P.; Hudak, Andrew T.; Huth, Andreas; Imbach, Benedikt; Jeffery, Kathryn J.; Katoh, Masato; Kearsley, Elizabeth; Kenfack, David; Kljun, Natascha; Knapp, Nikolai; Kral, Kamil; Krucek, Martin; Labriere, Nicolas; Lewis, Simon L.; Longo, Marcos; Lucas, Richard M.; Main, Russell; Manzanera, Jose A.; Martínez, Rodolfo Vasquez; Mathieu, Renaud; Memiaghe, Herve; Meyer, Victoria; Mendoza, Abel Monteagudo; Monerris, Alessandra; Montesano, Paul; Morsdorf, Felix; Næsset, Erik; Naidoo, Laven; Nilus, Reuben; O’Brien, Michael; Orwig, David A.; Papathanassiou, Konstantinos; Parker, Geoffrey; Philipson, Christopher; Phillips, Oliver L.; Pisek, Jan; Poulsen, John R.; Pretzsch, Hans; Rudiger, Christoph; Saatchi, Sassan; Sanchez-Azofeifa, Arturo; Sanchez-Lopez, Nuria; Scholes, Robert; Silva, Carlos A.; Simard, Marc; Skidmore, Andrew; Sterenczak, Krzysztof; Tanase, Mihai; Torresan, Chiara; Valbuena, Ruben; Verbeeck, Hans; Vrska, Tomas; Wessels, Konrad; White, Joanne C.; White, Lee J.T.; Zahabu, Eliakimu; Zgraggen, Carlo (Elsevier, 2022-03)
    NASA’s Global Ecosystem Dynamics Investigation (GEDI) is collecting spaceborne full waveform lidar data with a primary science goal of producing accurate estimates of forest aboveground biomass density (AGBD). This ...
  • Assessment of the mapping of fractional woody cover in southern African savannas using multi-temporal and polarimetric ALOS PALSAR L-band images 
    Urbazaev, Mikhail; Thiel, Christian; Mathieu, Renaud; Naidoo, Laven; Levick, Shaun R.; Smit, Izak P.J.; Asner, Gregory P.; Schmullius, Christiane (Elsevier, 2015-09)
    Woody vegetation cover affects several ecosystem processes including carbon and water cycling, energy fluxes, and fire regimes. In order to understand the dynamics of savanna ecosystems, information on the spatial ...
  • Conservation conundrum – red listing of subtropical-temperate coastal forested wetlands of South Africa 
    Van Deventer, Heidi; Adams, J.B.; Durand, J.F.; Grobler, E.; Grundling, P.L.; Janse van Rensburg, S.; Jewitt, D.; Kelbe, B.; Mackay, C.F.; Naidoo, Laven; Nel, Jeanne L.; Pretorius, L.; Riddin, T.; Van Niekerk, L. (Elsevier, 2021-11)
    Africa’s range-restricted and transitional subtropical-temperate coastal forested wetlands are facing interlinking threats of climate and anthropogenic pressures. We assessed their conservation status using the criteria ...
  • Estimating above ground biomass as an indicator of carbon storage in vegetated wetlands of the grassland biome of South Africa 
    Naidoo, Laven; Van Deventer, Heidi; Ramoelo, Abel; Mathieu, Renaud; Nondlazi, Basanda; Gangat, Ridhwannah (Elsevier, 2019-06)
    Wetlands store higher carbon content relative to other terrestrial ecosystems, despite the small extent they occupy. The increase in temperature and changes in rainfall pattern may negatively affect their extent and ...
  • Estimating tree species diversity in the savannah using NDVI and woody canopy cover 
    Madonsela, Sabelo; Cho, Moses Azong; Ramoelo, Abel; Mutanga, Onisimo; Naidoo, Laven (Elsevier, 2018-04)
    Remote sensing applications in biodiversity research often rely on the establishment of relationships between spectral information from the image and tree species diversity measured in the field. Most studies have used ...
  • Hyper-temporal C-band SAR for baseline woody structural assessments in deciduous savannas 
    Main, Russell; Mathieu, Renaud; Kleynhans, Waldo; Wessels, K.J. (Konrad); Naidoo, Laven; Asner, Gregory P. (MDPI Publishing, 2016-08-17)
    Savanna ecosystems and their woody vegetation provide valuable resources and ecosystem services. Locally calibrated and cost effective estimates of these resources are required in order to satisfy commitments to monitor ...
  • Indirect estimation of structural parameters in South African forests using MISR-HR and LiDAR remote sensing data 
    Mathieu, Renaud; Wessels, K.J. (Konrad); Naidoo, Laven; Verstraete, Michel; Asner, Gregory; Main, Russell (MDPI Publishing, 2018-09)
    Forest structural data are essential for assessing biophysical processes and changes, and promoting sustainable forest management. For 18+ years, the Multi-Angle Imaging SpectroRadiometer (MISR) instrument has been ...
  • Integrating random forest and synthetic aperture radar improves the estimation and monitoring of woody cover in indigenous forests of South Africa 
    Qabaqaba, Mcebisi; Naidoo, Laven; Tsele, Philemon; Ramoelo, Abel; Cho, Moses Azong (Springer, 2023-03)
    Please read abstract in article.
  • L-band synthetic aperture radar imagery performs better than optical datasets at retrieving woody fractional cover in deciduous, dry savannahs 
    Naidoo, Laven; Mathieu, Renaud; Main, Russell; Wessels, K.J. (Konrad); Asner, Gregory P. (Elsevier, 2016-10)
    Woody canopy cover (CC) is the simplesttwo dimensional metric for assessing the presence ofthe woody component in savannahs, but detailed validated maps are not currently available in southern African savannahs. A number ...
  • Mapping and monitoring fractional woody vegetation cover in the arid savannas of Namibia using LiDAR training data, machine learning, and ALOS PALSAR data 
    Wessels, Konrad; Mathieu, Renaud; Knox, Nichola; Main, Russell; Naidoo, Laven; Steenkamp, Karen (MDPI Publishing, 2019-11-11)
    Namibia is a very arid country, which has experienced significant bush encroachment and associated decreased livestock productivity. Therefore, it is essential to monitor bush encroachment and widespread debushing ...
  • Quantifying the structure of the woody element in Savannahs using integrated optical and Synthetic Aperture Radar (SAR) approach : a stepping stone towards country wide monitoring in South Africa 
    Naidoo, Laven (University of Pretoria, 2017)
    Savannahs, which are defined as a heterogeneous mixture of herbaceous and woody plant components, occupy one fifth of the global land surface and is the largest biome in South Africa. The woody vegetation structure of ...
  • Savannah woody structure modelling and mapping using multi-frequency (X-, C- and L-band) synthetic aperture radar data 
    Naidoo, Laven; Mathieu, Renaud; Main, Russell; Kleynhans, Waldo; Wessels, K.J. (Konrad); Asner, Gregory P.; Leblon, Brigitte (Elsevier, 2015-07)
    Structural parameters of the woody component in African savannahs provide estimates of carbon stocks that are vital to the understanding of fuelwood reserves, which is the primary source of energy for 90% of households ...