Urgent Problems Caused by Alien Species

Tracking marine alien species by ship movements.

Under human influence, plants, animals, and microbes are spreading beyond their native ranges faster and farther than ever before. Rates of invasion are increasing worldwide, especially in large aquatic systems (1). Many of these alien species appear to be innocuous, whereas others cause substantive impacts on biodiversity, ecosystem services, and human and animal health (2, 3). Effective manag...

Myth: Emergency room overcrowding is caused by non-urgent cases.

According to critics, patients with minor problems take up limited emergency room (ER) resources and create backlogs, leaving the sickest patients at risk of facing unreasonable and unsafe waits for potentially life-saving care. If this were true, then clearing the backlog would depend on diverting non-urgent patients away from the ER and increasing the number of primary care doctors available ...

Alien Species and Their Control

Urgent Problems at Small X

Regge theory provides an excellent fit to small-x structure-function data from Q 2 = 0 right up to the highest available values, but it also teaches us that conventional approaches to perturbative evolution are incorrect.

Invasion of North American drainages by alien fish species

1. Data from the literature were used to document colonization patterns by introduced freshwater fishes in 125 drainages across temperate North America. We analysed this data set to quantify susceptibility to invasion, success of the invaders and changes in species richness. 2. Drainages with a high number of impoundments, large basin area and low native species diversity had the greatest numbe...