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:
TAG: Species unique tidal marshes face threats

(Date:8/28/2014)... America (ESA) is pleased to announce the selection of ... Society. Honorary Membership acknowledges those who have served ESA ... the affairs of the Society that has reached an ... the ESA Governing Board and then voted on by ... the Awards Ceremony at Entomology 2014, ESA,s Annual Meeting ...
(Date:8/28/2014)... than traditional cigarettes, but still release toxins into ... USC. , Scientists studying secondhand smoke from e-cigarettes ... harmful particles, with close-to-zero exposure to organic carcinogens. ... in second-hand e-cigarette smoke were found to be ... levels of polycyclic aromatic hydrocarbons cancer-causing organic ...
(Date:8/28/2014)... MARC (Maximizing Access to Research Careers) Program has ... Society of America,s 27th Annual Mouse Molecular Genetics ... in Pacific Grove, California. These awards are ... doctorates and scientists from underrepresented groups into the ... encourage the participation of young scientists at the ...
Breaking Biology News(10 mins):Fred Baxendale selected as Honorary Member of the Entomological Society of America 2Second-hand e-cig smoke compared to regular cigarette smoke 2
(Date:8/28/2014)... Kent, WA (PRWEB) August 28, 2014 ... Synder Filtration’s polymeric membranes to its stable of ... of available molecular weight cut-offs and include membrane filters ... a steady increase in customer demand for our membrane ... a greater variety of flat sheet membranes,” explains Sterlitech ...
(Date:8/28/2014)... new work by a Florida State University research team ... take your temperature, emit white light, and convert photon ... looks like a butterfly. , Biwu Ma, associate professor ... the FAMU-FSU College of Engineering, created the molecule in ... to discover that his creation has many other unique ...
(Date:8/28/2014)... 28, 2014 A new market ... world is available from Strategic Consulting, Inc., the ... Industrial Microbiology Market Review, Fourth Edition: Global Review ... (IMMR—4) tracks and compares microbiology test volumes, market ... Europe and Asia, and forecasts future volumes and ...
(Date:8/28/2014)... 28, 2014 PrimeSource Building Products, ... selected SoundConnect to support their communication ... audio and web conferencing platform GlobalMeet powered by ... employees’ needs. SoundConnect delivers award winning “results ... Building Products will be utilizing GlobalMeet powered ...
Breaking Biology Technology:Sterlitech Corporation Enhances Its Selection of Flat Sheet Membrane Filters 2Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices 22 Billion Industrial Microbiology Tests Conducted for Product Quality and Safety Worldwide 22 Billion Industrial Microbiology Tests Conducted for Product Quality and Safety Worldwide 3PrimeSource Chooses SoundConnect as Collaboration Provider 2
Cached News: