HOME >> BIOLOGY >> NEWS
Species unique to tidal marshes face threats

Tidal marshes cover only about 45,000 square kilometers worldwide--about the area of Denmark. In comparison with other habitats, tidal marshes support few nonaquatic vertebrate species, but their unique characteristics have led to the evolution of species and subspecies that are endemic (found nowhere else). These endemic species and subspecies, which seem to be largely restricted to North America, have adaptations that suit them to life in a harsh environment in which seed abundance is low, salinity is high, and flooding is frequent. Yet they face a broad variety of threats from human-caused environmental damage, according to an assessment in the August 2006 issue of BioScience written by Russell Greenberg of the Smithsonian Migratory Bird Center and colleagues.

Tidal marshes occur in mid to high latitudes, along coasts that are protected within estuaries or behind barrier islands. They are most common in North America and China. Some tidal marsh species are protected from high salinity by relatively impermeable skin, and others have kidneys that can concentrate salts from large volumes of water or specialized glands that exude salt. Many are gray or black in color, which is believed to be an advantage because it matches the dark color of the soils often found in tidal marshes. Why endemic tidal marsh species seem to be largely restricted to North America--which has 24 of the worldwide total of 25--is not clear. Although it could reflect differing taxonomic practices in different countries, it may be related to the history of glaciation or of agriculture.
Endemic tidal marsh species are vulnerable to coastal development and to sea level rise, both of which are rapidly reducing the area of tidal marshes. They are also threatened by toxic wastes and invasive species. Greenberg and his coauthors argue for an expanded research program to try to understand how species will respond to these threats.

BioScience publishes commentary and peer-revi
'"/>

Contact: Donna Royston
droyston@aibs.org
202-628-1500 x261
American Institute of Biological Sciences
1-Aug-2006


Page: 1 2

Related biology news :

1. Species detectives track unseen evolution
2. Species thrive when sexual dimorphism broadens their niches
3. Species mapping revolutionized
4. Species take care of each other in ecological communities
5. Species evolve to the brink of evolution
6. Endangered Species Act provisions appear to benefit imperiled organisms
7. 2004 IUCN Red List of Threatened Species reveals 15,589 species at risk of extinction
8. A unique arrangement for egg cell division
9. Genomics study provides insight into the evolution of unique human traits
10. Geologists witness unique volcanic mudflow in action in New Zealand
11. Liverpool amongst first in UK to install unique DNA sequencing technology

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


(Date:2/8/2017)... YORK , Feb. 8, 2017 About ... individual,s voice to match it against a stored ... such as pitch, cadence, and tone are compared ... require minimal hardware installation, as most PCs already ... for different transactions. Voice recognition biometrics are most ...
(Date:2/7/2017)... MINNETONKA, Minn. , Feb. 7, 2017   ... that supports the entire spectrum of clinical research, is ... iMedNet , its innovative, highly flexible and ... iMedNet customers. iMedNet is a ... only provides Electronic Data Capture (EDC), but also delivers ...
(Date:2/3/2017)... Feb. 3, 2017 A new independent identity ... Partners, LLP (IdSP) . Designed to fill a critical ... identity market, founding partners Mark Crego and ... years just in identity expertise that span federal governments, ... leadership. The Crego-Kephart combined expertise has a common theme ...
Breaking Biology News(10 mins):
(Date:2/17/2017)... 17, 2017  Protagonist Therapeutics, Inc. (NASDAQ: PTGX) ... oral peptide drug candidates, PTG-100 and PTG-200, at ... Crohn,s and Colitis Organization (ECCO).  The ECCO congress ... from February 15 – 18, 2017. ... on Protagonist drug candidates PTG-100 and PTG-200. PTG-100, ...
(Date:2/16/2017)... GREENWICH, Conn. , Feb. 16, ... focused on venture growth investments in biotechnology and ... Josh Richardson , M.D. to Managing Director. ... companies.  He is a board observer at InfaCare ... Longitude,s investments in Aimmune Therapeutics, Akebia Therapeutics, Cadence ...
(Date:2/16/2017)... 2017   Capricor Therapeutics, Inc. (NASDAQ: ... developing first-in-class biological therapies for cardiac and other ... to terminate its license agreement with the Mayo ... Cenderitide. "Our decision to return these ... our efforts to advance our core cell and ...
(Date:2/16/2017)... Feb. 16, 2017  Dermata Therapeutics, LLC, a ... treat a variety of dermatological diseases, today announced ... financing and entered into a $5 million credit ... to use the capital for general corporate purposes ... in the treatment of serious diseases treated by ...
Breaking Biology Technology:
Cached News: