Search results for lake tana

Agriculture Nov 17, 2023

Use of urine in fertilizer can contribute to increased food security

The production of mineral based fertilizers requires a significant amount of energy and relies in part on non-renewable resources such as phosphate rock. Furthermore, the price of mineral fertilizer is currently at a record ...

Plants & Animals Mar 24, 2021

Biosphere reserves and human well-being: Lessons from UNESCO's EVAMAB project

The uneasy relationship between humans and nature is in constant evolution, but we are now witnessing major ecological and climatic changes that affect all of us. In the current context, we need to develop new concepts and ...

Environment Feb 12, 2019

Dams can mimic the free flow of rivers, but risks must be managed

In recent decades, humans have built many dams. These are designed to regulate flow for irrigation, hydropower and water supply. Most major rivers in the world are dammed.

Ecology Nov 24, 2015

Over half of world's primates on brink of extinction: experts

More than half the world's primates, including apes, lemurs and monkeys, are facing extinction, international experts warned Tuesday, as they called for urgent action to protect mankind's closest living relatives.

Ecology Oct 9, 2015

Fish species in Lake Tana genetically surprisingly similar

The different species of barbels in Lake Tana in northern Ethiopia have evolved from a common ancestor. When biologists from Wageningen University first described the fifteen species over twenty years ago, it was not yet ...

Environment Jul 21, 2015

First report on greenhouse gas emissions from African rivers

Twelve scientists from the University of Liege, the KU Leuven and the Research Institute for Development (France), have just completed a large-scale research project conducted over a five-year period on the African continent. ...

Earth Sciences Feb 2, 2015

What is the longest river in the world?

Planet Earth boasts some very long rivers, all of which have long and honored histories. The Amazon, Mississippi, Euphrates, Yangtze, and Nile have all played huge roles in the rise and evolution of human societies. Rivers ...

Ecology Jul 11, 2014

Ecologists make first image of food niche

The ecological niche concept is very important in ecology. But what a niche looks like is fairly abstract. Now, for the first time, Wageningen and British researchers have concretely visualised this. The ecologists have been ...

Earth Sciences Jul 12, 2011

Ethiopian lake sediments reveal history of African droughts

A new survey of Lake Tana in Ethiopia – the source of the Blue Nile – suggests that drought may have contributed to the demise of the Egyptian Old Kingdom, around 4200 years ago.

Earth Sciences Feb 24, 2011

Ancient catastrophic drought leads to question: How severe can climate change become?

How severe can climate change become in a warming world? Worse than anything we've seen in written history, according to results of a study appearing this week in the journal Science.

page 1 from 1