Tracing the origin of wood at the regional scale with dendrochemical markers: elemental and strontium and neodymium isotopic composition.

The dendrochemical approach holds significant promise for determining the geographical origin of wood as a complementary tool to dendroprovenancing based on tree-ring width. Tracing the origin of wood based on its elemental and isotopic composition is in particular interesting for provenance studies at the regional scale, as dendrochemical signatures are indicative of geological and pedological characteristics. Although, absorption of nutrients and trace elements reflects the composition of soil bioavailable pools, it is also modulated by multiple environmental and tree related factors.

Human-triggered magnification of erosion rates in European Alps since the Bronze Age.

A major feature of the Anthropocene is the drastic increase in global soil erosion. Soil erosion is threatening Earth habitability not only as soils are an essential component of the Earth system but also because societies depend on soils. However, proper quantification of the impact of human activities on erosion over thousands of years is still lacking.

Bibliometric analysis of publications on attention deficit hyperactivity disorder (ADHD) in France since 1974.

Background: The predominance of the psychodynamic approach is often put forward to explain the delay in diagnosis and treatment of attention-deficit disorder with hyperactivity (ADHD) reported in France.

Objective: A bibliometric study of abstracts, articles, or letters authored by French researchers may provide objective insight into this issue.

Methods: Online electronic databases were searched without any date limits for documents related to ADHD, and allocated to the AllFR group when all authors had an affiliation in France or to the notAllFR group when at least one author had an affiliation in France.

Sampling frequency, load estimation and the disproportionate effect of storms on solute mass flux in rivers.

Riverine discharge (Q) and dissolved concentrations (C) dictate solute mass export from watersheds. Commonly Q is tracked at a much higher frequency than C for most major solutes, leading to the necessity of load estimation algorithms which are often based on sparse data. The result is that the disproportionate effects of short-duration events (e.