Scientists Come Closer to Solving Caribbean Seaweed Mystery
samples also showed, for example, a 111% rise in the ratio of nitrogen to phosphorus during the same time frame. That ratio has been nearly constant across the world’s oceans going back decades. The change suggests the water chemistry has been radically altered.The researchers singled out the Amazon River for particular scrutiny.Climate changeAs global temperatures rise, scientists believe that rainstorms are intensifying in certain areas of the globe, including over the Amazon. Those storms are increasing the frequency of extreme flooding, which likely is pushing more nitrogen-rich runoff out
Amazon's Pink Dolphins Threatened by End of Fishing Ban
The Amazon river dolphin is an intelligent and friendly mammal that appears to grin and flush like a human blushing when it gets excited.But some are concerned about the world's largest freshwater dolphin coming under threat again in Brazil, where fishermen hunt and kill it illegally to make bait for a catfish called piracatinga.A legal moratorium on fishing the piracatinga ended last month, prompting calls for its renewal from environmentalists and researchers such as biologist Vera da Silva, who has worked to preserve the so-called pink river dolphins for 25 years."I never stop being amazed
New Pusher Tugs for Hidrovias do Brasil
Hidrovias do Brasil S.A. has started operating two new pusher tugs custom-designed by Vancouver, Canada based Robert Allan Ltd, pushing barges containing bulk products along the Amazon River system. This HB PIRARARA shallow-draft pusher tug and sister vessel HB PIRARUCU have a Robert allan RApide 4000-Z3 tug design and were constructed by Estaleiro Rio Maguari in Belem, Brazil.Computational Fluid Dynamics (CFD) simulations were used in the early phases of the design work to optimize the hull shapes and minimize total convoy resistance, and the Z-drives fitted in customized tunnels designed to optimize
Log-In Logística selects COMPAC
maintain. Performance will be assessed and if the results show an advantage, the owner has said it will consider the system for further newbuildings.” When delivered from the Chinese shipbuilder in April 2019, Log-In Polaris will operate in the Brazilian cabotage from Manaus, up in the Amazon river, to Buenos Aires in the Rio de la Plata. Last year, Thordon received a record number of containership COMPAC contracts, with orders from Lomar, Tropical Shipping, COSCO Shipping and Matson Navigation. To date, Thordon has supplied its water lubricated shaft system to more than 40 containership
Brazil Regulator Rejects Total Study on Drilling at Amazon River Basin
impact on marine mammals and turtles, clarify models for how oil in the water would disperse itself as well as address Ibama's initial rejection of Total's proposals for environmental monitoring and other projects. Oil leaks in the Foz do Amazonas basin, named for its location near the mouth of the Amazon river, could wreak havoc on the rainforest in Brazil's far northern Amapá state in addition to harming the reef, scientists and activists say. Total had said it expected a decision from Ibama this year and called for more flexibility from Brazil in awarding environmental licenses, saying Amap&aacut
A New Reef Biome Under the Amazon Plume
large and unique reef system has been discovered among offshore exploration and production blocks. In a research article recently published in Science Advances, a group of researchers from Brazil and the U.S. described the unexpected discovery they made in offshore shallow waters off the mouth of the Amazon River in northern Brazil. The international group of scientists, coordinated by Fabiano Thompson (UFRJ) and Carlos Rezende (UENF), which used research ships to study the offshore seabed, was immensely surprised when confronted by a large reef system under muddy water off the Amazon River mouth during
Side Scan Sonar Helps Discover Huge Reef
EdgeTech side scan sonar instrumental in the recent discovery of extremely large reef at the mouth of the Amazon River Side scan sonar equipment provided by EdgeTech was used in support of the recent discovery of a large coral reef at the mouth of the Amazon River. The recently publicized finding is exciting for researchers as they learn more about the area and the unique marine life and characteristics of the distinctive environment. One of the key researchers on the project is Dr. Michel Michaelovitch de Mahiques, Instituto Oceanográfico of the University of
February 2024
