Sentences with phrase «lake eutrophication»

None of the four Tiljander proxies used in Mann08 can be meaningfully calibrated to the instrumental temperature record, the result of progressive contamination of any climate signals during the 19th and 20th centuries by local activities (farming, peat cutting, road building, bridge reconstruction, lake eutrophication).

1850 - 1995, the major influences on the varve series were nearby agricultural activities, roadbuilding and bridge reconstruction, and lake eutrophication.

Unlike some other species, these tiddlers — of no commercial value — appear to be relatively unaffected by lake eutrophication, bank stabilization and channelization.

Not exact matches

«This symbiosis is very important since the leakage of phosphate from farm fields contributes to harmful eutrophication of rivers, lakes and seas,» says Cornelia Spetea Wiklund, professor at the Department of Biological and Environmental Sciences, University of Gothenburg.

For years scientists have known that nitrogen and phosphorus, which commonly enter freshwater lakes in chemical fertilizers, play a role in eutrophication — the process by which algal blooms, turbidity, and oxygen deficiencies turn a lake into a dead zone, largely devoid of animal life.

In a 37 - year experiment with a lake in northern Ontario, scientists demonstrated that controlling phosphorus in particular is the key to reversing eutrophication.

By the 1950s, a declining mayfly population in the western basin of Lake Erie indicated widespread anthropogenic eutrophication (human activities resulting in more nutrients such as phosphorus in the water, leading in turn to decreased oxygen levels).

But after the Nile perch was introduced — for commercial reasons — in the 1950s, and the lake also experienced substantial eutrophication, about half of the cichlid species became extinct.

Over the past 50 years, changes in land use and wastewater inputs have led to eutrophication of the lake, with increased turbidity and oxygen depletion in deeper waters.

They report in Environmental Research Letters that they examined 740 different production systems for 90 different foods, to calculate levels of land use, greenhouse gas emissions (GHGs), fossil fuel energy use, the nutrient runoff that leads to eutrophication or «dead zones» in lakes and rivers, and the potential for acidification of the waters.

Recent work has suggested that eutrophication might «reverse» the carbon budget of lakes and reservoirs (i.e., shifting the ecosystem from net heterotrophy to net autotrophy) by converting large amounts of CO2 to organic matter via elevated primary production (Pacheco et al. 2013).

A very shallow lake, its has suffered from eutrophication that has continued for decades, due to increased nutrient load from farming and other human activities.

Eutrophication overstimulates the growth of algae, phytoplankton, and simple plants in lakes or coastal regions.

The lakes ECV is of relevance to biogeochemical cycling, eutrophication, mesoscale climate models, human impact, vegetation dynamics, water cycle, and radiation budget climate studies.

In the long run, the excess algal growth can have devastating impacts on the health and age of a fresh water lake or river, causing eutrophication to speed up, where lakes and other water bodies fill in with dead algae and other organic matter and eventually turn into dry land.