Sentence examples for many river systems from inspiring English sources
Ranging from two to three inches in length with an even longer wingspan and a telltale orange abdomen, salmon flies represent a significant source of protein; on many river systems, they are the biggest bug the trout will see.
Much of the challenge is borne of the general scarcity of salmon in many river systems that once held sizable runs and the number of anglers besieging the fish with colorfully named flies in the streams where returns are more stable.
Droughts are predicted to increase in many river systems due to increased demand on water resources and climate variability.
Man-made, physical barriers have disrupted longitudinal connectivity for migratory fish in many river systems throughout the world for centuries.
Pleistocene glacial activity transformed the runoff regimes and sediment loads of many river systems in the Mediterranean region.
Sediment is a major non-point source pollutant in many river systems that greatly increases water treatment cost for domestic use.
The distributions of species of Pteronotropis, combined with the many rivers systems that they occupy and independently enter the Gulf of Mexico or Atlantic Ocean, make species of the genus of particular interest for both systematic and biogeographic evaluations.
It occupies the lowest point of the Australian continent (about 50 feet [15 metres] below sea level), and many large river systems drain into it.
Distributed worldwide in all oceans and seas except the Caspian and Aral seas, they range from equatorial to subpolar waters and also can be found in many major river systems.
Sockeye productivity in many Canadian river systems has declined over the last decade, including the Skeena River; thus multiple contributing factors other than farm-origin parasites are likely responsible for reduced sockeye productivity.
Broadly coincident with these events, many old, large river systems were destroyed and new ones formed as much of the world's landscape changed.
