Natural disturbances can produce misleading bioassessment results: Identifying metrics to detect anthropogenic impacts in intermittent rivers

Anthropogenic disturbances infiltrate forest fragments.

In the years after Edward O. Wilson and Robert MacArthur’s seminal book, The Theory of Island Biogeography (1), which laid the foundations for understanding species diversity and extinction rates in isolated habitats, was published in 1967, a flurry of papers erupted on the effect of fragmentation in tropical rainforests. The big question at that time was whether it would be more advisable to p...

Cross-scale Drivers of Natural Disturbances Prone to Anthropogenic Amplification: The Dynamics of Bark Beetle Eruptions

I between plants and insects encompass half of all ecological relationships (Strong et al. 1984), yet natural constraints keep most species from undergoing widescale population eruptions. Understanding the dynamics of eruptive species can provide valuable insights into fundamental ecological processes such as ecosystem disturbance, multitrophic interactions, symbioses, chemical signaling, and t...

Optimization of Natural Rhenium Irradiation Time to Produce Compositional Radiopharmaceutical

Introduction: Previously, 186Re and 188Re radioisotopes have been produced through appropriate activities, and each of them has been used for therapeutic applications. The 186Re and 188Re have unique properties, which make them proper for the treatment of  tumors in different sizes. The long-range 188Re, is suitabl...

Revolving rivers in sandpiles: from continuous to intermittent flows.

In a previous paper [E. Altshuler, Phys. Rev. Lett. 91, 014501 (2003)], the mechanism of "revolving rivers" for sandpile formation is reported: As a steady stream of dry sand is poured onto a horizontal surface, a pile forms which has a river of sand on one side flowing from the apex of the pile to the edge of the base. For small piles the river is steady, or continuous. For larger piles, it be...

Anthropogenic Impacts on Estuaries