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Tag: "rivers" at biology news

Anti-bacterial additive widespread in U.S. waterways

Many rivers and streams in the United Statesare believed to co...art on an analysis of water samples collected from rivers in andaround Baltimore, Md., as well as from local water filtration andwastewater treatment plants. ...

Researchers reveal the infectious impact of salmon farms on wild salmon

...easurements every 2 to 4 km. The fish start in the rivers and head to sea, traveling en masse in large mixed...er species, pink and chum salmon leave their natal rivers while still much smaller than your baby finger ?3 cm long ?and weighing only half a gram. "The young...

Essential mangrove forest threatened by cryptic ecological degradation

...ironment interactions that affect the hydrology of rivers has turned coastal mangrove lagoons into freshwater bodies. Such elucidation of past ecosystem processes and human-environment interactions is an essential part of the Past Global Changes (PAGES) project of the International Geosphere-Biosphere Prog...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...savannah, into open fields. Riparian forests along rivers have been cut down or degraded which has led to increased erosion and sedimentation, and disruption of the local hydrologic pattern. This has made navigation difficult and also hindered waterfowl and fish migration." Local cattle raising in the Pant...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

... miles away from the Kvichak are similar lakes and rivers with record production. "Our research is directed toward understanding why these runs see such different trends, by looking broadly at different systems subject to the same climate factors and constructing ecosystem conditions going back hundreds of...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...rom farms, which dump tons of excess nitrogen into rivers that eventually flow into the sea. "There has been an international effort to try to understand the productivity of the oceans and their potential vulnerability to nitrogen," said Pamela A. Matson, the dean of the School of Earth Sciences and co-aut...

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

...at adults spawning in less predictable streams and rivers ?ones where conditions are good some years and bad in others -?may be genetically inclined to produce more offspring that are likely to stray. Then there are salmon like the chinook where brothers and sisters from the same parents don't mature and r...

Innovative collaboration brings Arctic science into the classroom

...ater discharge from Russian, Alaskan, and Canadian rivers into the Arctic Ocean. Accompanying him on his travels will be Amy Clapp, an elementary school teacher from Salisbury, Vermont, as part of Teachers and Researchers Exploring and Collaborating (TREC). TREC, a program in which K-12 teachers participate...

Rabies spread speeds up

...ncorporated the likely effect of Ohio's five major rivers on transmission from local points along the Pennsylvania or West Virginia border but also adjusted their model to estimate the potential impact of long distant translocations, such as the occasional garbage truck ride. They estimated that rabies woul...

Beneficial Beetles Battle Pesky Saltcedar

...avoc with farm roads and fields. For example, when rivers and streams overflow their banks, saltcedar bushes can trap natural flood debris, blocking waterflow and causing new, erosive channels to form. These channels sometimes undercut farm roads and fields, causing them to collapse. What's more, river raf...

Amazon source of 5-year-old river breath

The rivers of South America's Amazon basin are "breathing" fa...ed ?or outgassed ?as carbon dioxide from Amazonian rivers and wetlands has spent a mere 5 years sequestered in the trees, other plants and soils of the surrou...

Assessing the Amazon River's sensitivity to deforestation

...zon carries more water than the nine other largest rivers of the world combined. The first phase of the study, led by Marcos Costa at the University of Viçosa in Minas Gerais, Brazil and completed in 2002, put together an enormous collection of data describing the physical characteristics of the Amazon Rive...

Researchers identify new catfish family

...itation of the forests and possible damming of the rivers it lives in. ...

Study shows eutrophic lakes may not recover for a millennium

... has nowhere to go but into the streams, lakes and rivers of the watershed where it is applied. "There's a huge amount of phosphorus in the watershed that hasn't washed into the lake yet," says Carpenter, meaning the problem is likely to persist for centuries. The new study models phosphorus loading into ...

Past droughts geographically widespread in the West, according to tree-ring data

...chers conclude that water supply for those western rivers fluctuated in synchrony during periods of severe d...able to make up for deficits on the Salt and Verde rivers during times of extreme drought," said Charlie Ester, Salt River Project's manager of Water Resource...

Leading scientists rank endangered dolphins, porpoises most in need of immediate action

... in gillnets in the Mekong, Mahakam and Ayeyarwady rivers and in Chilka and Songkhla lakes, Southeast Asia * Indo-Pacific humpback dolphins and Indo-Pacific bottlenose dolphins in drift and bottom-set gillnets on the south coast of Zanzibar (Tanzania) * Harbor porpoises in coastal gillnets in the Bl...

Canada's first embryonic stem cell lines

... in gillnets in the Mekong, Mahakam and Ayeyarwady rivers and in Chilka and Songkhla lakes, Southeast Asia * Indo-Pacific humpback dolphins and Indo-Pacific bottlenose dolphins in drift and bottom-set gillnets on the south coast of Zanzibar (Tanzania) * Harbor porpoises in coastal gillnets in the Bl...

Novel targets found for the development of drugs to complement, or replace, statins

... in gillnets in the Mekong, Mahakam and Ayeyarwady rivers and in Chilka and Songkhla lakes, Southeast Asia * Indo-Pacific humpback dolphins and Indo-Pacific bottlenose dolphins in drift and bottom-set gillnets on the south coast of Zanzibar (Tanzania) * Harbor porpoises in coastal gillnets in the Bl...

Virulizin granted orphan drug status in Europe

... in gillnets in the Mekong, Mahakam and Ayeyarwady rivers and in Chilka and Songkhla lakes, Southeast Asia * Indo-Pacific humpback dolphins and Indo-Pacific bottlenose dolphins in drift and bottom-set gillnets on the south coast of Zanzibar (Tanzania) * Harbor porpoises in coastal gillnets in the Bl...

Birds and bats sow tropical seeds

...nants and fragments and large tracts growing along rivers in rain forests," he said. "I think what it will show is that the replanting that almost everybody does in (tropical regions) is an extremely inefficient way to maintain and promote species diversity." Howe hopes the project -- which he expects wil...

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