HOME >> BIOLOGY >> NEWS
Studies: Floyd, other major hurricanes of '99 caused significant changes in nation's largest lagoonal estuary

CHAPEL HILL - In as few as six weeks in late summer and early autumn 1999, three major hurricanes -- Dennis, Floyd and Irene -- walloped and partially drowned great swaths of eastern North Carolina under more than three feet of rain. Floodwaters at some sites rose more than 20 feet.

Besides their human toll, the storms powerfully altered the nation's largest lagoonal estuary, Pamlico Sound, new studies show. They flushed unprecedented amounts of nutrients and sediments into this key Mid-Atlantic fisheries nursery, sickening and killing countless thousands of fish and shellfish and greatly diluting the shallow waterway's natural saltiness.

The studies, published as a single paper in the May 8 issue of the Proceedings of the National Academy of Sciences, showed floodwaters displaced three-fourths of the sound's volume. Salinity also declined by two-thirds, and the sound's annual intake of nitrogen jumped by at least 50 percent in the aftermath. "Within six weeks, the entire water content of Pamlico Sound was replaced by the flood," said Dr. Hans W. Paerl, Kenan professor at the University of North Carolina at Chapel Hill's Institute of Marine Sciences and lead author of the paper. "Normally, that would take a year because the sound has only four small inlets restricting exchange with the sea."

Freshwater algae and higher organisms that normally live far up in the freshwater tributaries feeding the Pamlico Sound were driven far down into the sound, Paerl said. This was accompanied by a period of low-oxygen conditions in the sound's bottom waters, restricting habitat for shellfish and finfish." Resident crab, shrimp and fish communities either scurried out of the system, took up residence near the inlets or, in some cases, just died.

"While extensive low-oxygen conditions were documented during fall 1999, we didn't see equivalent low oxygen during the summer of 2000 because that spring and summer were very windy, keeping the waters well-mixed," the scient
'"/>

Contact: David Williamson
David_Williamson@unc.edu
919-962-8596
University of North Carolina at Chapel Hill
6-May-2001


Page: 1 2 3

Related biology news :

1. New molecular link key to cellular proteins involved in cancer progression, other diseases
2. New hydrothermal vents discovered as South Pacific Odyssey research begins
3. Posters highlight water, energy and other natural resource research
4. Joslin Diabetes Center honors brothers living 70-plus years with type 1 diabetes
5. K-State, other universities to study how climate affects plant evolution
6. The search for a kinder, gentler chemotherapy
7. Green tea research leads to gum and other products
8. New survey reveals insights into unique relationship between mothers and pediatricians
9. Manatee population rising in some regions, likely stalled or declining in others
10. Study shows impact of emotionally healthy fathers when mothers poor mental health affects children
11. Another key for the p53 door

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/5/2020)... (PRWEB) , ... August 05, 2020 , ... Regenative Labs ... two new innovations, CoreText™ and ProText™, making them the first Wharton’s jelly allografts to ... using a syringe. The company’s solutions are the first Wharton’s jelly allograft product to ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been ... Medical Neoasis™ active noise control device to attenuate typical noises in a simulated ... attenuated the alarm sounds from patient monitors, ventilators and other bedside devices that ...
(Date:7/2/2020)... (PRWEB) , ... July 01, 2020 , ... ... presented its phase 1a findings of Neihulizumab, a biologic for the treatment of ... June 2020. Led by hemato-oncologist Dr. Paul J Martin of the Fred Hutchinson ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... ... August 11, 2020 , ... ... chain validation engineering firm, is making available for free its new white ... incorporate concurrent transport simulation testing into today’s biologics licensing application (BLA). In ...
(Date:8/7/2020)... ... August 06, 2020 , ... VGXI, a highly ... closed on the purchase of greenfield for a new, expanded manufacturing facility. The ... 21 acres in the initial acquisition, with an option to purchase an additional ...
(Date:8/3/2020)... ... August 03, 2020 , ... Introducing Ardent Animal Health ... growth, , Known as MediVet Biologics since its formation in ... The new Ardent Animal Health will build on its base of innovative therapies ...
(Date:7/31/2020)... (PRWEB) , ... July 29, 2020 , ... ... today announced the launch of its new tagline, “BUILDING FOR LIFE.” The adoption ... industry and around the globe, requiring fast track capacity to provide patients with ...
Breaking Biology Technology:
Cached News: