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:10/18/2014)... stress-related psychiatric disorders are associated with increased ... mechanisms underlying this relation are unknown. Understanding ... of targeted preventive strategies and new or ... work is presented at the European College ... international group of researchers from Germany and ...
(Date:10/17/2014)... Rockville, MD – Accurate knowledge regarding Ebola is critical ... current risk of hazardous global outbreak and epidemic. The ... has launched a special issue, Ebola Virus and Public ... with necessary knowledge in this critical societal moment. ... Primer on Ebola for Clinicians . The primer was ...
(Date:10/17/2014)... news release is available in German . ... only a very few drugs. When treating overdoses, doctors are ... is especially difficult if there is a combination of drugs ... playing and accidentally swallows his grandmother,s pills? ETH professor Jean-Christophe ... wanted to find an answer to this question. "The task ...
Breaking Biology News(10 mins):Researchers find why depression and aging linked to increased disease risk 2Emergency aid for overdoses 2Emergency aid for overdoses 3
... plants, animals, and microbes introduced to regions beyond their ... $1.4 trillion dollars . They are responsible for the loss ... uptick in infectious diseases. Not all non-native species pose ... several decades teasing apart the conditions that set the stage ...
... posed to people who work with tiny fibres used in ... Research into the health risks posed by nanofibres used ... has pinpointed the lengths at which these fibres are harmful ... a range of materials including carbon, are about 1,000 times ...
... salt sea without an outlet, lies over 400 meters ... because it increases their buoyancy. "For scientists, however, ... a diachronic view of its climate past," says Prof. ... and Paleontology at the University of Bonn. ...
Cached Biology News:Losing stream in our battle to predict and prevent invasive species 2Losing stream in our battle to predict and prevent invasive species 3Drastic desertification 2Drastic desertification 3
(Date:10/20/2014)... 2014 Local veterinary surgeon, Dr. Tim ... study of donor stem cells for dogs with osteoarthritis. ... and has performed clinical stem cell therapy for 7 ... determine if a single injection of donor stem cells ... reduce pain and inflammation in the treated joints. ...
(Date:10/19/2014)... The Asian Automatic patient billing report ... and forecast of revenue. The Automatic patient billing market ... million by 2018, at a developing CAGR of 7.2% ... of the Asian Automatic patient billing market, to get ... provides a glimpse of the segmentation of this market ...
(Date:10/19/2014)... 2014 According to market research ... WLAN Controllers; Wireless gateways)]- Global Advancements, Forecasts and ... global Outdoor Wi-Fi market with analysis and forecasting ... also identifies the drivers and the restrains for ... opportunities and challenges. , Browse 65 market data ...
(Date:10/18/2014)... The Asia-Pacific hardware encryption display market report defines and ... forecast of revenue. This market was valued $5,154.0 million ... by 2018, at a CAGR of 58.4% from 2013 ... Asia-Pacific hardware encryption market report, to get an idea ... glimpse of the segmentation of the market, and is ...
Breaking Biology Technology:Cascade Veterinary Referral Center Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 3Outdoor Wi-Fi Market (by Access Points, WLAN Controllers, Wireless gateways) Expected to Cross $37.2 Billion by 2018 - New Report by MarketsandMarkets 2Outdoor Wi-Fi Market (by Access Points, WLAN Controllers, Wireless gateways) Expected to Cross $37.2 Billion by 2018 - New Report by MarketsandMarkets 3Outdoor Wi-Fi Market (by Access Points, WLAN Controllers, Wireless gateways) Expected to Cross $37.2 Billion by 2018 - New Report by MarketsandMarkets 4The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 3
... Scheduled for Thursday, May 1, 2003 at the Midwest ... about addressing the commonchallenges of migrating Microsoft Windows NT(R) ... 2003 family delivers a connected, scalable,reliable platform that has ... solve complex IT infrastructure problems. , , ,"We ...
... the Midwest. Only five of these types of facilities exist ... Terrence R. Dolan, PhD, Director of the Fitchburg Technology Campus. ... factory will be an engine for Wisconsins biotechnology industry. Sources ... list of global clients who are eagerly awaiting its start-up. ...
... any good entrepreneur will tell you that every opportunity is ... weve received about 1,500 applications for financing, performed about 750 ... or facilitated more than a dozen investments (and a couple ... a final reminder of why were doing this in the ...
Cached Biology Technology:Biotech Manufacturing Facility to be Built in Wisconsin 2"For Angels Only...When to say No... 2"For Angels Only...When to say No... 3