The piñon (Pinus edulis Engelm.)-juniper [Juniperus monosperma (Engelm.) Sarg.] woodlands of Bandelier National Monument are experiencing accelerated erosion. Earlier studies suggest that causes of these rapidly eroding woodlands are related to an unprecedented rapid transition of ponderosa pine (Pinus ponderosa C. Lawson) savanna to piñon-juniper woodlands as a result of cumulative historical ...

Rainfall simulations allow for controlled comparisons of runoff and erosion among ecosystems and land cover conditions. Runoff and erosion can increase greatly following fire, yet there are few rainfall simulation studies for post-fire plots, particularly after severe fire in semiarid forest. We conducted rainfall simulations shortly after a severe fire (Cerro Grande) in ponderosa pine forest n...

Unprecedented development along tropical shorelines is causing severe degradation of coral reefs primarily from increases in sedimentation. Sediment particles smother reef organisms and reduce light available for photosynthesis. Excessive sedmentation can adversely affect the structure and function of the coral reef ecosystem by altering both physical and biological processes. Mean sediment rat...

Surface sediment samples obtained from 46 sites of the Unete River in Casanare (Colombia) were analyzed to evaluate concentrations heavy metals As, Cu, Ni, Pb and Zn as well determine their geographic spatial distribution potential ecological risk. The measured compared with background values (BV), threshold effect concentration (TEC) probable (PEC) consensus-based Sediment quality criteria gui...

Chloramphenicol antibiotics (CAs) are broad-spectrum which widely used in the prevention and treatment of infectious diseases livestock poultry breeding. However, overused CAs can enter watershed eventually sediment. Antibiotics sediment cause secondary pollution through disturbance suspension. In this study, taking Fenhe River Basin as research area, risk were assessed by collecting samples. T...