Several mining companies have proposed building the world's largest open pit mine in Bristol Bay's headwater rivers.
Yasuní protects a large tract of the Napo Moist Forests terrestrial ecoregion [24] and the Upper Amazon Piedmont freshwater ecoregion, which contains numerous headwater rivers of the Amazon [25].
However, MSW salmon form an important component of the female spawning stock in some tributaries as well as in the mainstem and all three large headwater rivers, Kárášjohka, Iešjohka and Inarijoki (Niemelä 2004).
Our previous studies exploring population structure of Teno salmon with genetic clustering methods indicated that each tributary (T) sample constitutes a separate genetic cluster, while a collection of samples from the mainstem and headwater rivers (MS/HW) constituted four genetic clusters: Teno main stem lower (TmsL), Teno main stem Upper (TmsU), Iešjohka and Kárášjohka (Vähä et al. 2007).
First, after introducing basic concepts, relevant scales and methodologies, the different components of Quaternary routing systems from erosion in headwaters, river systems, glacial and paraglacial systems, lakes, deltas, estuaries, coasts, shelves, epicontinental seas, and deep-sea fans are discussed in terms of their sediment budget.
From its headwaters the river flows west-northwest, leaving the mountains to meander through the level plains of the Llanos.
From its headwaters, the river flows north for a short distance and collects the Lyell Peak Fork.
Nepal is a strategic buffer between China and India, and it controls the headwaters of rivers providing water for hundreds of millions of people in the region.
Born in the icy headwaters of rivers on the east coast of North America, Britain, Iceland, Ireland, Poland, Portugal, Russia, Scandinavia and Spain, baby salmon, or parr, swim far out to sea to fatten up on herring and sprat.
