Navigation Links
Prague's 88 nature reserves threatened by invasive plant species
Date:10/7/2011

Cities are generally regarded as hostile for wildlife and urbanization a dramatic form of destruction of natural habitats. Still, they are far from dead zones. Their biodiversity may even exceed that of surrounding landscapes, owing to heterogeneous environments and frequent localization in naturally rich areas that historically supplied diverse resources for their human inhabitants.

"This is definitely the case of the city of Prague, Czech Republic", says the lead author Prof. Vojtěch Jarok of the study published in the open access journal NeoBiota. "Prague contains spectacular natural features, rarely seen in other metropolitan areas of comparable size, protected in 88 nature reserves. Our analyses build on systematic surveys of vascular plants flora, carried out in these reserves in the late 1980s/ early 1990s. The reserves are important sanctuaries hosting more than half of the plant species occurring in the Czech Republic."

"On the other hand, it is alien species that contribute to this remarkably high species richness", adds the Prof. Petr Pyek. "It has been repeatedly documented that urban environment and life style promote introductions of alien species. The conservation in cities focuses on the diversity of native species, and urban areas are therefore the place where these 'two diversities' come to a sharp conflict, resulting from the discrepancy between human efforts to protect natural biodiversity and, at the same time, by human activities that create ideal environment for invasions by alien species. Nature reserves in large urban agglomerations are therefore seen as a testing ground for exploring the patterns of resistance of natural vegetation against penetration of alien plants."

The study found that archaeophytes, i.e. alien species introduced since the beginning of Neolithic agriculture up to 1500 A. D., are affected positively by the extent of arable land that was in place at the time of the reserve establishment at low altitudinal ranges. Though it may be questioned whether species of alien origin should be a part of red lists, endangered archaeophytes are perceived by botanists as elements of local nature, typical of traditional cultural landscapes in Europe and considered as species of cultural and historical importance. This suggests that for endangered archaeophytes it might have been difficult to adapt to changing agricultural practices, and shrubland might act as a refugium for them.

Forty-six of the 155 neophyte species (introduced after 1500 A.D.) recorded in the reserves are classified as invasive. The reserves thus harbour 67% of the 69 invasive neophytes recorded in the country, and particularly warning is that among the most invasive species are many shrubs and trees, a life form that is known to account for widespread invasions with high impacts. The results thus strongly suggest that in Prague nature reserves there is a warning potential for future invasions.


'/>"/>

Contact: Vojtech Jarosik
jarosik@cesnet.cz
420-221-951-854
Pensoft Publishers
Source:Eurekalert  

Related biology news :

1. Sirtris review of sirtuin therapeutics for diseases of aging in Nature Reviews Drug Discovery
2. Extreme nature helps scientists design nano materials
3. Nature study demonstrates that bacterial clotting depends on clustering
4. Nature Medicine study shows Peregrines bavituximab can cure lethal virus infections
5. Unifying the animate and the inanimate designs of nature
6. CIC Teams With Industry Leader iPipeline to Provide Electronic Signature Platform to the Nations Top Insurance Carriers
7. Researchers find natures shut-off switch for cellulose production
8. Researchers push nature beyond its limits to create higher-density biofuels
9. Scientists make strides toward defining genetic signature of Alzheimers disease
10. New genetic markers for ulcerative colitis identified, researchers report in Nature Genetics
11. CIC to Host Webinar Featuring Independent Research Firm: Enabling Straight Through Processing - Why the Insurance Industry Needs Electronic Signature Technology
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Prague's 88 nature reserves threatened by invasive plant species
(Date:6/16/2016)... 16, 2016 The global ... to reach USD 1.83 billion by 2024, according ... Inc. Technological proliferation and increasing demand in commercial ... to drive the market growth.      ... The development of advanced multimodal techniques for biometric ...
(Date:6/9/2016)... June 9, 2016  Perkotek an innovation leader in attendance control systems is proud ... work hours, for employers to make sure the right employees are actually signing in, ... ... ... ...
(Date:6/7/2016)... , June 7, 2016  Syngrafii Inc. and ... business relationship that includes integrating Syngrafii,s patented LongPen™ ... project. This collaboration will result in greater convenience ... credit union, while maintaining existing document workflow and ... ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... 2016 , ... Cancer experts from Austria, Hungary, Switzerland, and ... new and helpful biomarker for malignant pleural mesothelioma. Surviving Mesothelioma has just published ... , Biomarkers are components in the blood, tissue or body fluids that ...
(Date:6/27/2016)... ... June 27, 2016 , ... ... will join the faculty of the University of North Carolina Kenan-Flagler Business ... strategy and entrepreneurship at UNC Kenan-Flagler, with a focus on the school’s international ...
(Date:6/24/2016)... , June 24, 2016  Regular discussions on a range ... place between the two entities said Poloz. Speaking ... Ottawa , he pointed to the country,s inflation ... federal government. "In ... "Both institutions have common economic goals, why not sit down ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle ... people with peritoneal or pleural mesothelioma. Their findings are the subject of a new ... , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma ...
Breaking Biology Technology: