Patterns of fish diversity in a mainstem Missouri River reservoir and associated delta in South Dakota and Nebraska, USA

摘要: There is an expansive and expanding delta at the confluence of Niobrara Missouri Rivers in Lewis Clark Reservoir. The provides diverse aquatic habitat that somewhat similar to historic River remnant river habitats. As such, may have relatively high fish species diversity compared lentic reservoir To compare patterns between habitats, we collected several nursery habitats both areas using four gear types (seine, gill net, electrofisher fyke net) on three occasions (July, August September) 2005. Species richness was higher (n = 34) than (n = 22). Thirteen composed more 1% collections while only collections. (Fisher's α) also significantly delta. Higher be explained by diversity. These results suggest newly forming deltas potential protect restore diversity, because they retain natural functions such as sediment transport formation. Copyright © 2007 John Wiley & Sons, Ltd.