What's New
- Urban Ecosystems 1: Cities are Urban Ecosystems
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To understand that cities are urban ecosystems which include both nature and humans, in a largely human-built environmental context. To understand that urban ecosystems have emergent properties that cannot easily be seen by simply looking at the different functional parts of a city: The whole is more than the sum of the parts
- Urban biodiversity, urban sustainable environment
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Welcome to the Belgian Clearing-House Mechanism, the portal site set up by Belgium to promote technical and scientific cooperation in the field of biodiversity and to provide information on matters related to the Convention on Biological Diversity.
- Ecology Explorers
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Hits: 2
Added: July 29, 2008
Rating: Votes: 27 Rate ItMost people in the US live in cities but may not understand the ecological processes going on around them. People influence ecological conditions and at the same time, we are influenced by those conditions. As an Ecology Explorer, you will be studying your schoolyard (or backyard) as part of an urban ecosystem.
- Earth on Edge: Urban Ecosystems
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Cities aren't just centers of commerce, industry, education, and culture. They are also living entities urban ecosystems with green spaces and waterways that bring together nature and human habitat.
- A Series of Workshops & Short-Courses for Educators
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The Baltimore Ecosystem Study project offers a series of workshops and short courses - Investigating Urban Ecosystems - to help teachers incorporate student research in the local environment into their teaching. These programs can be taken by any teacher, and stipends often can be arranged with the teachers' school or school district.
- Why Leaves Change Color
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Hits: 3
Added: July 26, 2008
Rating: Votes: 16 Rate ItIf you are lucky, you live in one of those parts of the world where Nature has one last fling before settling down into winter's sleep. In those lucky places, as days shorten and temperatures become crisp, the quiet green palette of summer foliage is transformed into the vivid autumn palette of reds, oranges, golds, and browns before the leaves fall off the trees. On special years, the colors are truly breathtaking.
- Urban Forestry Laboratory Exercises
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Urban Forestry Laboratory Exercises has been developed as a supplemental activity guide that can be used in any science or interdisciplinary class. The hands-on activities are designed to be data gathering exercises leading the student to make judgments based on analysis and synthesis of the gathered data.
- Urban forest Health Needs Assessment Survey
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The Urban Forest Health Needs Assessment Survey was designed to query urban forestry professionals and learn about their attitudes toward the general issue of urban forest health, identify specific training and information needs in the areas of urban tree health management, and discover preferences in educational outreach methods.
- Urban Forest Health
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But perhaps the greatest benefit is individuals and community groups working together to plant and preserve trees, and in the process, developing important conservation values and fostering community spirit.
- Urban and Community Forestry Achievements in 1998
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Fiscal Year (FY) 1998 produced advances in integrating ecological issues with growth management to improve the environment and the quality of life of urban residents. Computer modeling tools like American Forest's CITYGreen are becoming available to local units of government to assist with better land use planning and management.
- Tree Identification Database
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Provides images and descriptions of trees
- Tree Hazards: Recognition and Reduction in Recreation Sites
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This publication is primarily for the practicing forester or technician who has responsibility for the administration, operation, and maintenance of recreation sites, particularly campgrounds, picnic grounds, and winter sports areas in the central Rocky Mountains.
- Tree Decay: An Expanded Concept
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The purpose of this publication is to clarify further the tree decay concept that expands the classical concept to include the orderly response of the tree to wounding and infection-compartmentalization-and the orderly infection of wounds by many microorganisms-successions.
- Things to consider to repair or replace storm-damaged yard trees
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When a storm strikes, clearing damaged trees and branches is the first response, but the care you give your trees before and after a storm can be the key to their survival or loss. This fact sheet summarizes some key points to consider in assessing and repairing damaged trees and replacing those that must be removed. Also listed are people to call for advice or assistance and publications available in your area that can provide more detailed information.
- There's Life in Hazard Trees
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The objective of this information guide is to provide considerations regarding wildlife when making decisions during hazard tree assessments. The decision-making model provided with this guide can be used as a tool during tree inspections.
- The Raccoon -- Friend or Foe
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Hits: 4
Added: July 26, 2008
Rating: Votes: 22 Rate ItThe raccoon (Procyon lotor) is an important link in nature's food web. Raccoons are also beneficial to humans because of their consumption of pesky insects and mice, their aesthetic qualities, and their fur. They are an enjoyable and lovable animal; however, they can cause damage and pose health problems to animals and humans. This publication describes precautions that you can take to avoid potential raccoon problems.
- Sphaeropsis Shoot Blight
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Non-native, exotic pine species growing outside their natural range are especially vulnerable to attack. Other predisposing environmental factors include poor site, drought, hail or snow damage, compacted soils, excessive shading, insect activity or other mechanical wounding.
- Rx For Wounded Trees
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This booklet offers guidelines on how to care for trees to keep them healthy and to protect them from wounds. It also prescribes ways to prevent, recognize, and minimize damage by decay that most often sets in after tree wounding.
- Pruning Ice-Damaged Trees
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A full discussion of recovering from ice storm damage to trees: assessment of damage, repairs, removal, tools, leader replacement, straightening bent trees, and a bibliography and list of information sources.GO TO ARTICLE #48
- Private Landowners Rate Forest Certification
- Planting Trees in Designed and Built Community Landscapes
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Trees create green spaces in communities. The right trees in the right places benefit you, your home, and your community now and in the future. It is essential to select living trees to create a sense of place within communities.
- Pest Alert: Gypsy Moth
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Hits: 1
Added: July 26, 2008
Rating: Votes: 16 Rate ItThe gypsy moth has been an important pest of hardwoods in the Northeastern United States since its introduction in 1869. Established populations exist in all or parts of 19 states from Maine to Wisconsin and south to Illinois and generally in a southeasterly line from Illinois to northeastern North Carolina.
- Oak Wilt
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Oak wilt, caused by the fungus Ceratocystis fagacearum, kills oak trees. It has been found in 21 States, with considerable damage occurring in the Midwest. It was first recognized as an important disease in 1944 in Wisconsin (fig. 1) where, in localized areas (less than 100 acres (40.4 ha)), over half the oaks have been killed. Surveys in eight Wisconsin counties showed that about 11 percent of the annual growth increase of oak forests was offset by mortality caused by oak wilt.
- Oak Decline
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Periodic occurrences of decline and death of oaks over widespread areas have been recorded since 1900. These outbreaks, variously named oak decline, oak dieback, or oak mortality, are caused by a complex interaction of environmental stresses and pests and given the name oak decline.
- Invasion of the Weird Trees
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....they come in all shapes and sizes. They fill the air with sweet,``fragrant scents of spring blossoms, and splash the landscape with``brilliant colors in the fall. They cool the air with their shade and``provide a barrier against the harsh winter wind. They add beauty``and comfort to our lives, as well as furnishing us with thousands of``products we use every day.
- Illinois Small Community Tree Programs: Attitude, Status and Needs
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In Illinois, 95% of the state's incorporated communities are classified as small (population less than 25,000), with approximately one-third of the state's citizens (3.6 million of 11.2 million) residing in these small communities. The objective of this survey was to obtain information on the status and needs of programs for managing public shade and street trees in the small communities of Illinois.
- Identify, Prevent, and Control Oak Wilt
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Oak wilt is an aggressive disease that affects many species of oak (Quercus spp.). It is one of the most serious tree diseases in the eastern United States, killing thousands of oaks each year in forests, woodlots, and home landscapes.
- Identify and Manage Dutch Elm Disease
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Because elm is so well-suited to urban environments, it continues to be a valued component of the urban forest despite the losses from DED. The challenge before us is to reduce the loss of remaining elms and to choose suitable replacement trees for the ones we cannot save.
- How to Save Dutch Elm Diseased Trees By Pruning
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Dutch elm disease (DED), caused by the fungus, Ceratocystis ulmi, is the most devastating shade tree disease in the United States. Healthy elms can become diseased by 1) elm bark beetles that carry the fungus from elm to elm, or 2) through root grafting with already infected trees. Along with wilt symptoms, streaking (sapwood discoloration), a characteristic internal symptom of the disease, progresses rapidly down from limbs inoculated by bark beetles (Allison 1978).
- How to Recognize Hazardous Defects in Trees
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Trees add to our enjoyment of outdoor experiences whether in forests, parks, or urban landscapes. Too often, we are unaware of the risks associated with defective trees, which can cause personal injury and property damage. Interest in hazard tree management has increased in recent years due to safety and liability concerns resulting from preventable accidents. Recognizing hazardous trees and taking proper corrective actions can protect property and save lives.
