<span>Stream size and speed is dependent on discharge. Discharge is the volumetric or mass flowrate flowing out of the conduit. Gradient is a factor since it is the driving force of flow such as pressure difference. Load as well which pertains to mass is a factor. The answer is salinity. </span>
Scientists are concerns about the loss of species because the loss of one species can set off a chain reaction that cause other species to die out and affect out food chain.