Estimating Fish Species Richness across Multiple Watersheds

摘要: Assessing fish species richness at the scale of an entire watershed or multiple watersheds is important when designing conservation areas and maintaining aquatic biodiversity. Estimating biodiversity this requires considering effects habitat heterogeneity within across drainages on species-area relationship (SAR). I examined SAR using unusually complete data to assess in minimally disturbed large public lands Sand Hills ecoregion, southeastern United States America (USA). My objectives were compare (1) true with estimates produced by different estimators sampling designs (2) among reservations. Accurate obtained for five contiguous (780 km2 total) Chao 2 first-order jackknife estimators, coupled a stratified design that apportioned effort over 25 sample sites based major spatial correlates assemblage composition, including stream size drainage basin identity sufficient collect enough individuals include rare species. The greatest was streams land holding characterized greater instream diversity, less coverage, more forested land, closer proximity source pools than other Species these range observed high diversity Neotropical Indomalayan realms.