Navigation Links
Human population the primary factor in exotic plant invasions in the United States

Extensive ongoing research on biotic invasions around the world constantly increases data availability and improves data quality. New research in the United States shows how using improved data from previous studies on the establishment of exotic plant species changes the understanding of patterns of species naturalization, biological invasions, and their underlying mechanisms. The study was published in the open access journal NeoBiota.

Over the centuries, people brought uncounted numbers of nonnative or exotic plant species to the United States for a range of purposes. Usually cultivated for food or ornamental purposes, most of these plants are considered "naturalized" when they reproduce and sustain populations over many generations without direct help from humans. Many others were introduced accidentally.

"About 10 percent of naturalized plant species usually become invasive, and more may be so over time" says Qinfeng Guo, research ecologist with the Forest Service Eastern Forest Environmental Threat Assessment Center and lead author of the article. "This means that they begin to spread considerable distances from the parent plants, often crowding or shading out native plant populations."

Guo and fellow researchers used newly added and improved data to look more closely at plant naturalization patterns across the United States. Focusing on the state-level, they correlated previously used independent variables analyses, such as human population and area with comparable-level date on native and exotic plant richness.

"When we looked at the additional variables for which data just became available, some different patterns emerged, some significant," said Guo."We found that though the number of native plant species is largely controlled by natural factors such as area and temperature, exotic species are predominantly influenced by social factors, such as human population levels and dates when states were first settled."

The researchers concluded that the positive effect of human population on the number of exotic species is probably associated with the primary sources and points of introduction along with human-assisted dispersal in the United States. They also found a strong relationship between foreign and domestic exotic richness, which might indicate that domestic and foreign exotic plants exhibit similar patterns and mechanisms of naturalization across the 48 United States despite their different origins.

Though this particular study was conducted primarily at the state level, different statistical methods produced remarkably similar results regardless spatial correlation. "However, a greater challenge ahead now is how to properly handle greater numbers of variables with increased data availability," said Guo. "Caution is needed when dealing with this data at other spatial scales such as county and county-level."


Contact: Qinfeng Guo
Pensoft Publishers

Related biology news :

1. Swiss Institute of Bioinformatics celebrates 10th birthday by presenting major gifts to human health
2. Scientists identify novel inhibitor of human microRNA
3. During exercise, the human brain shifts into high gear on alternative energy
4. Complete Genomics launches, becomes worlds first large-scale human genome sequencing company
5. Research shows Brazilian acai berry antioxidants absorbed by human body
6. Study: Bird diversity lessens human exposure to West Nile Virus
7. Human Microbiome Project awards funds for technology development, data analysis and ethical research
8. launches new animated 3-D views of human body in action
9. Gene with probable role in human susceptibility to pulmonary tuberculosis identified
10. The American Society of Human Genetics hosts 58th Annual Meeting in Philadelphia
11. Genetic based human diseases are an ancient evolutionary legacy
Post Your Comments:
Related Image:
Human population the primary factor in exotic plant invasions in the United States
(Date:11/4/2015)... , November 4, 2015 ... market report published by Transparency Market Research "Home Security Solutions ... and Forecast 2015 - 2022", the global home security solutions ... bn by 2022. The market is estimated to expand ... from 2015 to 2022. Rising security needs among customers ...
(Date:10/29/2015)... --  MedNet Solutions , an innovative SaaS-based eClinical technology ... is pleased to announce that it has been selected ... of only three finalists for a 2015 Tekne ... category. The Tekne Awards honor Minnesota ... and leadership. iMedNet™ eClinical  technology ...
(Date:10/29/2015)... , Oct. 29, 2015 Daon, a global ... it has released a new version of its ... North America have already installed ... also includes a FIDO UAF certified server component ... preparing to activate FIDO features. These customers include some ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... , ... November 24, 2015 , ... ... OrthoAccel® Technologies, Inc., on being named to Deloitte's 2015 Technology Fast 500 list ... facility, OrthoAccel manufactures AcceleDent®, a FDA-cleared, Class II medical device that speeds up ...
(Date:11/24/2015)... , Nov. 24, 2015  PDL BioPharma, Inc. (PDL) (NASDAQ: ... , the company,s president and chief executive officer, will present ... next week in New York City . ... Tuesday, December 1, 2015 at 9:30 a.m. EST. ... to the website at least 15 minutes prior to the ...
(Date:11/23/2015)... 24, 2015 Women with a certain type of ... a higher risk of lung cancer than men with similar ... at the annual meeting of the Radiological Society of ... --> --> Lung nodules are small masses ... or subsolid based on their appearance on CT. Solid nodules ...
(Date:11/23/2015)... Falls Church, VA (PRWEB) , ... November 23, 2015 , ... ... Ellen McCarthy , former Director, Plans and Programs, National Geospatial Intelligence Agency (NGA), ... comes to us with an incredibly distinguished career in the intelligence community and the ...
Breaking Biology Technology: