Preprint Article Version 1 This version not peer reviewed

Successes of Restoration and Its Effect on the Fish Community in a Freshwater Tidal Embayment of the Potomac River, USA

Version 1 : Received: 10 May 2017 / Approved: 11 May 2017 / Online: 11 May 2017 (07:54:59 CEST)

A peer-reviewed article of this Preprint also exists.

de Mutsert, K.; Sills, A.; Schlick, C.J.C.; Jones, R.C. Successes of Restoration and Its Effect on the Fish Community in a Freshwater Tidal Embayment of the Potomac River, USA. Water 2017, 9, 421. de Mutsert, K.; Sills, A.; Schlick, C.J.C.; Jones, R.C. Successes of Restoration and Its Effect on the Fish Community in a Freshwater Tidal Embayment of the Potomac River, USA. Water 2017, 9, 421.

Journal reference: Water 2017, 9, 421
DOI: 10.3390/w9060421

Abstract

After a local pollution control plant significantly reduced phosphorus loading into a phytoplankton-dominated tributary of the Potomac River in the early 1980’s, water quality and biological communities were monitored bi-weekly from April-September. After a 10-year time-lag, submerged aquatic vegetation (SAV), once abundant in this freshwater tidal embayment, returned to the area in 1993. After additional reductions in nitrogen load starting in 2000, the system completely switched to a SAV-dominated state in 2005. Fish abundance didn’t change during these distinct phase changes, but the fish community structure did. Increases in SAV provided refuge and additional spawning substrate for species with adhesive eggs such as Banded Killifish (Fundulus diaphanus), which is now the most abundant species in the embayment. Other changes seen were a decrease in the relative contribution of open water dwelling species such as White Perch (Morone americana), and an increase of visual predators such as Largemouth Bass (Micropterus salmoides). The 30-year record of data from this Potomac River tributary has revealed many important long-term trends that validate the effectiveness of initiatives to improve water treatment, and will aid in the continued management of the watershed and point source inputs.

Subject Areas

fish assemblages; community dynamics; alternate stable states; eutrophication; submerged aquatic vegetation; nutrient load reduction; point-source pollution

Readers' Comments and Ratings (0)

Leave a public comment
Send a private comment to the author(s)
Rate this article
Views 0
Downloads 0
Comments 0
Metrics 0
Leave a public comment

×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.