Approximately 34 m.y. ago, Earth’s climate transitioned from a relatively warm, ice-free world to one characterized by cooler climates and a large, permanent Antarctic Ice Sheet. Understanding this major climate transition is important, but determining its causes has been complicated by uncertainties in the basic patterns of global temperature and ice volume change. Here we use an unusually wel...

In the summer of 2022, Po River Delta (Northern Italy), a eutrophication hotspot, was severely affected by high temperatures, exceptional lack rainfall and saline water intrusion. The effect intrusion on benthic nitrogen dynamics, in particular N removal capacity, investigated during extreme drought conditions. Laboratory incubations intact sediment cores were used to determine denitrification ...

Abstract River deltas provide important livelihoods to local populations, but at the same time are under increasing anthropogenic pressure. The opening of Gibe III dam on Omo in Ethiopia 2016 attracted international attention due importance free-flowing for pastoralist communities Delta. Sustainable river basin management requires spatially explicit, long-term information about human settlement...

Microbial communities are responsible for the bulk of biogeochemical processing in temporary headwater streams, yet there is still relatively little known about how community structure and function respond to periodic drying. Moreover, the ability to sample temporary habitats can be a logistical challenge due to the limited capability to measure and predict the timing, intensity and frequency o...

BACKGROUND, AIM, AND SCOPE The chemical substance 2,4,7,9-tetramethyl-5-decyne-4,7-diol (TMDD) is a non-ionic surfactant used as an industrial defoaming agent and in various other applications. Its commercial name is Surynol 104 and the related ethoxylates are also available as Surfynol 420, 440, 465 and 485 which are characterized by different grades of ethoxylation of TMDD at both hydroxyl fu...

The article presents the research results on identification of seasonal variability in values physicochemical parameters and metal content water Northern Dvina River. Sampling was carried out daily from January 23, 2020 to 2021 at low tide. In general, researchers have revealed that studied largely depend volume river runoff, underlying rocks basin, also anthropogenic influence. Thus, pH, miner...

some biological characteristics of broodstock and juvenile kutum, rutilus kutum. were investigated using data collected from the estuaries of tajen and shirood rivers (tr and sr) (southern caspian sea basin) as well as from the caspian sea in 2012. the results showed higher condition factors (cf) in the male broodstocks kutum than those estimated in the female broodstock of both tr and sr. the ...

The Permanent Protection Areas (PPA) are relevant to ensure vegetation around the drainage network. This paper presents an automated methodology for extraction of from river and generation PPA, analysis environmental adequacy. is based on geoprocessing remote sensing techniques applied RapidEye satellite images. analyzed area covers a portion Paraíba do Sul basin, located in city São José dos C...