The extent of tree defacement is unknown.
At the island's head, water is channelized around obstructions such as tree trunks in relatively rapid flow, which may limit the lateral extent of tree island growth.
Urban variables studied are: the extent of tree canopy coverage, traffic load, surfaces albedo modification, street deepening aspect and the street's ventilation.
We used high spatial resolution remote sensing data to quantify the spatial extent of tree mortality using a 1 m true color aerial photograph and a 1 m LiDAR digital elevation model.
The density of roads (−ve) and the extent of tree cover (+ve) in a landscape were highly correlated with the occurrence of urban sensitive species while at the site level the density of roads and density of rivers were the strongest contributors to their presence.
This potential can be juxtaposed against the extent of tree cover, also estimated from the MODIS sensors, to indicate deforested sites in the rainforest zone.
Therefore, our results suggest the loss of morphological divergence between habitats depends upon the extent of tree cover along the gradient, and that the loss of morphological diversity in traits typically shown to be important in fitness in birds [31] has been greater in West Africa where deforestation has been more extensive [24], [25], [30].
The amenity context and the extent of tree mortality are obviously independent of each other, but together were expected to both shape the context of perceptions of landscape disturbance with important implications for forest management.
WNV infection in Cx. quinquefasciatus was significantly higher in CSO compared with non-CSO streams, and WNV infection rates among humans and corvids were significantly associated with proximity to CSO-affected streams, the extent of tree cover, and median household income.
A previously observed inverse association between street trees and asthma (Lovasi et al. 2008) was limited by an ecologic design, with the neighborhood unit of analysis being much larger than the 0.25-km buffer areas evaluated in this study, and did not consider the full geographic extent of urban trees, due to a focus exclusively on street trees.
