Zhaofei Fan results 28
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Chinese tallow ( Triadica sebifera ) is a menacing invasive tree species in the southeastern United States (US), posing serious ecological and economic threats. Despite numerous regional-scale studies, little research has examined methods to understand localized drivers of tallow density, particularly in the pine flatwoods of coastal Mississippi. This study evaluated five statistical models, Linear Regression (LR), Spatial Aut...
Exploring the sensitivity of SAOCOM L-band SAR to forest biomass under severe spatial uncertaintyNARA Subscribed
Synthetic aperture radar remote sensing has long been recognized as a valuable tool for estimating aboveground biomass density in forest ecosystems. In this study, we specifically evaluated the sensitivity of the SAOCOM mission to forest biomass under conditions of high spatial uncertainty in reference data (± 1.6 km). A complex single-look SAOCOM acquisition was processed to obtain a comprehensive set of polarimetric backscat...
Silvicultural Treatments Affect Growth and Foliar Nutrients in a Young Ponderosa Pine StandNARA Subscribed
Foliar nutrient status, diameter, and height growth were investigated for young ponderosa pine (Pinus ponderosa) stands grown under six fertilizer and herbicide treatments (including control) in southeast Washington to diagnose foliar nutrient status and evaluate the effects of silvicultural treatments on growth rates. Two application methods of fertilizer (one “best guess” multi-nutrient fertilizer blend) and herbicide applic...
Natural Regeneration Dynamics of Longleaf Pine Under Frequent, Low-Intensity Prescribed Fires in Southern Alabama, USANARA Subscribed
Frequent (≤3 y) prescribed burn has been conducted in the Escambia Experimental Forest in southern Alabama, USA, since 2001.The change in the density of new germinants (≤1 y) and older seedlings and saplings (>1 y) of longleaf pine (Pinus palustris Mill.) from stands of varying conditions was quantified using the locally estimated scatterplot smoothing and spatial statistical methods. A relatively longer fire interval or time...
Robinia pseudoacacia decline and fine root dynamics in a plantation chronosequence in the Yellow River Delta, ChinaNARA Subscribed
Fine roots (<2 mm in diameter) play a significant role in tree growth and stand productivity. However, knowledge of fine root dynamics in saline alkali soil remains limited. Using sequential soil core and ingrowth core methods, we assessed the dynamics of aboveground biomass (AGB) and production (AGP), fine root biomass (FRB), production (FRP) and turnover (FRT), and soil properties (water content [SWC], salt content [SSC], pH...
Spatiotemporal Invasion Severity of Chinese Tallow ( Triadica sebifera ) and Invasibility of Forest Types in Southern US ForestlandsNARA Subscribed
Quantifying invasion severity of nonnative invasive plant species is vital for the development of appropriate mitigation and control measures. We examined more than 23,250 Forest Inventory and Analysis (FIA) plots from the southern coastal states of the United States to develop an alternative method to classify and map the invasion severity of Chinese tallow (Triadica sebifera). Remeasured FIA plot-level data were used to exam...