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:3/29/2016)... RATON, Florida , March 29, 2016 ... or the "Company") LegacyXChange "LEGX" and SelectaDNA/CSI Protect are ... DNA in ink used in a variety of writing ... theft. Buyers of originally created collectibles from athletes on ... through forensic analysis of the DNA. ...
(Date:3/21/2016)... Massachusetts , March 22, 2016 ... facial recognition with passcodes for superior security   ... ), a leading provider of secure digital communications services, ... their biometric technology and offer enterprise customers, particularly those ... secure facial recognition and voice authentication within a mobile ...
(Date:3/15/2016)... Yissum Research Development Company of the ... the Hebrew University, announced today the formation of ... various human biological indicators. Neteera Technologies has completed its ... investors. ... electromagnetic emissions from sweat ducts, enables reliable and speedy ...
Breaking Biology News(10 mins):
(Date:5/18/2016)... (PRWEB) , ... May 18, 2016 , ... The Academy ... is now celebrating its dream of reaching a total of $1 million in awarded ... awarded to 10 high school graduates from across the nation has helped bring the ...
(Date:5/17/2016)... Texas (PRWEB) , ... May 17, 2016 , ... ... for use in animal waste reduction applications, announced today it will be showcasing ... Moines, Iowa. , ManureMagic™ was featured in the Wall Street Journal last year ...
(Date:5/17/2016)... (PRWEB) , ... May 17, 2016 , ... The Children’s ... bridges, and monuments across the globe will show their support in the fight against ... , Neurofibromatosis, NF, is a genetic disorder that causes tumors to grow on nerves ...
(Date:5/17/2016)... ... May 17, 2016 , ... Yukon Medical, a leading ... (Becton, Dickinson and Company) to receive its Global Product Innovation Supplier of the ... made significant contributions to advancing or supporting key BD initiatives, products, processes, and ...
Breaking Biology Technology:
Cached News: