Navigation Links
Natural regeneration building urban forests, altering species composition
Date:8/22/2012

o a high of 89 percent in Los Angeles, according to the study. Results indicated that in cities located in grassland or desert regions, a greater percentage of the urban tree population is planted compared to cities in forested regions. The percentage of planted trees also increases with increased population density and impervious cover.

The factors that affect tree cover also play a role in natural regeneration. Precipitation, air temperatures, surrounding natural vegetation type, and the distribution of land use types in the city all influence how much seed source exists and whether seedlings grow. Land use plays a role in whether seedlings are mowed down or whether paved surfaces prevent seedling establishment, and ultimately affect a city's need for tree planting to sustain tree cover.

"Before we can say how many trees we need to plant, we need to know how many trees are regenerating naturally and how many are dying," according to Nowak. "Planting programs to sustain tree cover can be greatly improved with long-term monitoring data to show how the urban forest is changing."

Researchers evaluated the magnitude of natural regeneration or tree planting across an entire city system by randomly locating 0.04-hectare field plots in each city and recording tree measurements as well as an estimate of whether a sampled tree was planted or occurred through natural regeneration. Crews based their estimates on surrounding conditions. For example, trees along fence lines or in unmaintained areas were generally classified as naturally regenerated, while trees in maintained lawn areas or street trees were typically classified as planted. Residential and commercial/industrial areas have the highest proportion of planted trees, 74.8 percent and 61.2 percent respectively, while trees found in parks, cemeteries, golf courses, open space/vacant land, agricultural fields and wetlands are predominately the result of natural regeneration.

The study also evaluated two
'/>"/>

Contact: Jane Hodgins
jmhodgins@fs.fed.us
651-649-5281
USDA Forest Service - Northern Research Station
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Biology professor secures grant to save West Virginias primary natural history collection
2. Validity CTO to Present Natural ID Solutions for Improving Mobile Risk Management and User Experience at NFC Solutions Summit 2012
3. Honoring the fundamental role of microbes in the natural history of our planet
4. Resveratrol may be a natural exercise performance enhancer: U of A medical research
5. Naturally adhesive
6. No matter the drilling method, natural gas is a much-needed tool to battle global warming
7. The ecology of natural gas
8. Bringing natural history collections out of the dark
9. Health care savings, naturally
10. Eco-computer with a natural wood look
11. Ben-Gurion University of the Negev receives $450,000 grant to conduct oil and natural gas research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/22/2014)... Dec. 22, 2014 Research and Markets ... the "The Global Watermarking and Fingerprinting Markets" ... http://photos.prnewswire.com/prnh/20130307/600769 This insight ... watermarking and fingerprinting markets. Watermarking aims to control ...
(Date:12/19/2014)... VIEW, Calif. , Dec. 18, 2014  23andMe, Inc., the ... study that pinpoints fine-scale differences in genetic ancestry of individuals ... Since immigrants first arrived more than four hundred years ... as a meeting place for peoples from different continents. This ...
(Date:12/17/2014)... 15, 2014  HITLAB SM announced today its completion ... its adherence to current U.S. Food and Drug Administration ... smart device and smart phone application trials utilizing the ... "HITLAB is determined to improve global healthcare access, ...
Breaking Biology News(10 mins):The Global Watermarking and Fingerprinting Markets 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2
... of Toronto-based researchers may be one step closer to a ... research and therapy. Induced pluripotent stem cells (iPSCs) can ... flexibly develop into many different types of cells. However, producing ... generation are largely unknown. But researchers from the University ...
... CHARGE syndrome* is a severe developmental disorder affecting multiple ... majority of patients carry a mutation in a gene ... broad spectrum of characteristic CHARGE symptoms has been a ... an important class of epigenetic regulators. DNA is wound ...
... that causes tuberculosis (TB) varies between patients of different ... tests to diagnose and monitor treatment for the disease, ... PLOS Pathogens . , The study, led by ... with the Medical Research Council,s National Institute for Medical ...
Cached Biology News:Toronto team ID proteins key in stem cell production 2Exercise rescues mutated neural stem cells 2Exercise rescues mutated neural stem cells 3Scientists discover ethnic differences in immune response to TB bacterium 2Scientists discover ethnic differences in immune response to TB bacterium 3
(Date:1/22/2015)... GEA Niro Soavi the leader in high ... PandaPLUS 2000, which is ideal for new applications for ... disruption . This compact laboratory homogenizer is the perfect ... food additives and ingredients as well as for the ...
(Date:1/22/2015)... Boulder, CO / Rootstown, OH (PRWEB) January 22, 2015 ... sensitive detection platform, announced today that it has received AOAC-PTM ... O26, O45, O1O3, O111, O121, and O145; collectively referred to ... (E. coli) O157, at 1 colony forming unit (cfu) per ...
(Date:1/22/2015)... January 22, 2015 Selexis SA, a ... Research Cell Banks (RCBs) used for drug discovery to ... Banks will include Next-Generation Sequencing (NGS) data ... de-risks biologic manufacturing by ensuring the integrity of the ...
(Date:1/22/2015)... , Jan. 22, 2015   GenoSpace , a precision ... tools to enable the broad use of genomic, imaging and ... the appointment of Michelle Munson , CEO of Aspera, ... Logo - http://photos.prnewswire.com/prnh/20150122/170713 ...
Breaking Biology Technology:GEA Niro Soavi Announces the PandaPLUS 2000 Homogenizer for Processing New Applications for Nanoemulsions and Cell Disruption 2Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2GenoSpace Expands Board with Appointment of Michelle Munson 2
... Direct and indirect sales momentum gathers for the ... Feb. 28 /PRNewswire/ - Touch,Bionics, developer of the ... Prosthetic Supply) the leading U.S. O&P distributor today,announced ... distribution agreement for,the i-LIMB Hand in the United ...
... 28 PAREXEL International,Corporation (Nasdaq: PRXL ) ... James 29th Annual Institutional Investors Conference at the ... Senior Vice,President and Chief Financial Officer will be ... ET on Monday, March 3, 2008., A ...
... Microchip Biotechnologies, Inc.,(MBI) is collaborating with ... sample preparation system to generate template libraries,for ... project is to automate,the complex, multi-step upstream ... Pyrosequencing. "Using,MBI,s MOV technology to develop and ...
Cached Biology Technology:Touch Bionics signs U.S. distribution agreement with SPS 2PAREXEL International to Present at Raymond James 29th Annual Institutional Investors Conference 2Microchip Biotechnologies, Inc. Collaborating With Stanford University on Developing a Front End Microfluidic-Based Sample Preparation System for Pyrosequencing Platforms 2
TP-1 (NDOG1)...
Mouse monoclonal [6G11] to Cytohesin 1 + 2 ( Abpromise for all tested applications)....
HP 1 alpha Immunogen: Synthetic peptide between amino acids 1-100 of the human HP 1 alpha protein. Storage: -20 C, Avoid Freeze/Thaw Cycles...
... Immunogen KLH-conjugated, synthetic ... 54-75 (RRGPHRNPG-PGDDDGQRSRSSS) of mouse p19ARF. ... to amino acids 62-75. Clone ... Routinely evaluated by immunoblot. ...
Biology Products: