9 hasil untuk "Robbert Duker"
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Artikel Jurnal
Transfer learning from citizen science photographs enables plant species identification in UAV imagery
Accurate information on the spatial distribution of plant species and communities is in high demand for various fields of application, such as nature conservation, forestry, and agriculture. A series of studies has shown that Convolutional Neural Networks (CNNs) accurately predict plant species and…
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Automated mapping of Portulacaria afra canopies for restoration monitoring with convolutional neural networks and heterogeneous unmanned aerial vehicle imagery
Ecosystem restoration and reforestation often operate at large scales, whereas monitoring practices are usually limited to spatially restricted field measurements that are (i) time- and labour-intensive, and (ii) unable to accurately quantify restoration success over hundreds to thousands of…
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Site selection for subtropical thicket restoration: mapping cold-air pooling in the South African sub-escarpment lowlands
Restoration of subtropical thicket in South Africa using the plant Portulacaria afra (an ecosystem engineer) has been hampered, in part, by selecting sites that are frost prone—this species is intolerant of frost. Identifying parts of the landscape that are exposed to frost is often challenging…
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Restoring South African subtropical succulent thicket using Portulacaria afra: root growth of cuttings differs depending on the harvest site during a drought
The restoration of succulent thicket (the semi-arid components of the Albany Subtropical Thicket biome endemic to South Africa) has largely focused on the reintroduction of Portulacaria afra L. Jacq—a leaf- and stem-succulent shrub—through the planting of unrooted cuttings directly into field…
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The soil microbiomics of intact, degraded and partially-restored semi-arid succulent thicket (Albany Subtropical Thicket)
This study examines the soil bacterial diversity in the Portulacaria afra-dominated succulent thicket vegetation of the Albany Subtropical Thicket biome; this biome is endemic to South Africa. The aim of the study was to compare the soil microbiomes between intact and degraded zones in the…
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Science is the fuel required for lifting ecosystem restoration into the orbit of hundreds of millions of hectares
Restoring the hundreds of millions of hectares of degraded ecosystems worldwide will require new approaches to raise the required funds and new systems to implement at the required scales. Two decades of large-scale restoration in the subtropical thicket biome in the Eastern Cape, South Africa…
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Arthropod Assemblages in Desert Ecosystems of Alula County, Saudi Arabia
ABSTRACT Despite their ecological importance, epigeic arthropod assemblages in hyper‐arid systems remain understudied, particularly across the Arabian Peninsula. We provide an initial description of epigeic arthropod assemblages sampled in two protected areas in AlUla County in the Kingdom of Saudi…
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Artikel Jurnal
Organic carbon stocks in aboveground biomass and soils in hyper-arid AlUla County, Saudi Arabia
Abstract Background Dryland ecosystems, which cover nearly half of the Earth's terrestrial surface, play a considerable role in global carbon dynamics yet remain underrepresented in carbon stock assessments. This study evaluates organic carbon stocks in six protected areas within the hyper-arid…
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Artikel Jurnal
Allometric equations for hyper-arid desert plant species of AlUla County, Saudi Arabia
Abstract Background Estimates of aboveground woody plant biomass in hyper-arid ecosystems have predominantly relied on allometric equations developed in more mesic habitats. However, these equations do not account for local variations in plant morphology, necessitating the development of equations…