Spotlight #84 – Task Force probes ‘whys’ behind increased tree mortality
Tree mortality appears to be increasing at unprecedented rates.
One may be tempted to think: So what? Trees regenerate. They’ll grow back.
But, for a lot of reasons, it’s not quite that simple.Read more…
IUFRO All-Division 7 Meeting at the 125th Anniversary Congress
An Interview with Division 7 Coordinator Eckehard Brockerhoff of Scion (New Zealand Forest Research Institute)
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IUFRO Regional Congress for Asia and Oceania 2016
24 – 27 October 2016, Beijing, China
Forests for Sustainable Development: The Role of Research
The Beijing Declaration
As global trade has expanded, there has also been an accompanying increase in invasions of insects and pathogens into areas where they never before existed.
In many cases these invasions have caused significant forest damage, negative economic impacts and loss of forest ecosystem services.
Meanwhile, climate change is affecting the geographic distribution of host trees and their associated insects and pathogens. Increased pest impacts – both native and alien – can be expected.
When one thinks of forests, the immediate thought is most likely of trees. That makes sense.
But forests and trees don’t exist in isolation. Things that affect – and are affected by – forests range from human activities to climate; from water and soils to insects and disease and from economics to forest products, to name just a few.
With that in mind, the IUFRO 2015-2019 Strategy focuses on five research themes: Forests, Soil and Water Interactions; Forests for People; Forests and Climate Change; Forests and Forest-based products for a Greener Future; and Biodiversity, Ecosystem Services and Biological Invasions. Read more…
Scientists call for innovative solutions and a better-coordinated global approach to manage invasive pests and protect the value and potential of planted forests.
(Pretoria/Vienna 21 August 2015) Forests worldwide are continually under threat from introduced insects and pathogens. This is despite the best biosecurity efforts. Without a concerted global effort to understand and control invasive pests, this problem is expected to worsen as international trade increases. Read more…
American Indian forestry: blending science and tradition
For thousands of years, American Indians have been managing the forests in which they live.
Today, with trained professionals who are tribal members, their forests are managed with modern tools and methods; include manufacturing facilities and address global forest issues such as climate change, forest certification, carbon sequestration and a changing work force.
Threats to Forest Health – Forest Pests and Diseases, Biological Invasions, Air Pollution and Climate Change
For more information on IUFRO Division 7 Forest Health: http://www.iufro.org/science/divisions/division-7/
The papers presented in this session addressed the relationship between changing climatic conditions and biotic factors such as bark beetles and wasps causing forest health problems of various degrees.
One paper highlighted present and projected changes caused by interactive impacts of increasing temperatures, ground-level ozone, nitrogen deposition, and CO2 on forests growth and soil and water processes in south-western and northern forests in the United States. These changes may predispose forests to altered water regimes, biodiversity insect attacks, wind-throw, frost damage and catastrophic fires.
Other presentations highlighted the effects of insects on forests in Northern and Central America. Generally, the number of severe outbreaks is increasing, but little is known about the causes of these calamities. Recent research clearly indicates, however, that several earlier benign insect species show damaging outbreaks because of increased stress on the ecosystem. Range expansions of e.g. bark beetle could also be observed and appear to be closely linked to changing climatic conditions.
A cost-benefit analysis of surveillance of ash borer population which is rapidly spreading in many regions due to international trade is worthwhile and cost-effective. Using bio-economic modeling on surveillance trapping helps to optimize surveillance and eradication programs. Given the increasing frequency and severity of insect outbreaks in Northern America continuous surveillance of invasive wood borers and bark beetles is also recommended for Latin America.
Presentations in this session:
Interactive effects of air pollution and climate change on forests in the United States (Andrzej Bytnerowicz, USDA Forest Service, USA)
Sirex noctilio in Argentina: What we know and still need to know to manage populations successfully (Juan Corley, Argentina)
A cost-benefit analysis of surveillance for invasive wood borers and bark beetles (Eckehard Brockerhoff, IUFRO Division 7 Coordinator, Scion, New Zealand)
Evaluation of mortality in natural stands of Pinus ocarpa an P. caribeae in Nicaragua (Lori Eckhart, Auburn University, USA)
The bark beetle outbreaks of Western North America (Christopher Fettig, Pacific Southwest Research Station, USA)
Second Session: Threats to Forest Health: Forest Pests and Diseases, Biological Invasions, Air Pollution and Climate Change
The main focus of the session was the impact of invasive species on forests and solutions for tackling these problems. Examples were given from different countries and continents including the US, South Africa, Argentina and New Zealand. Solutions are various and obviously depend on the respective case.
Common issues related to globalization and its impact on forest health were raised by all speakers. Live plant material, including seeds, have been implicated in many cases as pathways for invasions of alien pests and pathogens of forest trees and other plants. Solving this problem is difficult because many plants may be asymptomatic and infected plants may thus be difficult to exclude. Answering specific research questions, such as what type of organisms invade from where and related aspects, are required to allow informed decision-making. These are complex problems that require application of newest technologies and also require broad international collaboration.
Actions taken for integrated pest management include education of students, companies, pupils; communication with all stakeholders and the inclusion of locals in monitoring activities. Last but not least, training, early research including close collaboration and teamwork, the maintenance of quarantine facilities are keys to success.
It was recognized that in many countries, there is not good communication between forestry researchers and plant quarantine agencies that hold the responsibility for solving these problems. The group also concluded that the problem of biological invasions is perhaps not adequately recognized by the forestry research community, including within IUFRO. This suggests that there remains a need to educate the broader research community on the importance of this issue.
Presentations in this session:
Invasions by non-indigenous forest insects and diseases in the US (Andrew Liebhold, US Forest Service, USA)
Continuing spread of plantation pests and pathogens – is there a solution? (Jolanda Roux, University of Pretoria, South Africa)
Advances in IPM of a key pest of poplars in Argentina, Megaplatypus mutates (Mariana Moya, Universidad de Buenos Aires, Argentina)
Successful forest protection is a multifaceted endeavour (Tod Ramsfield, Natural Resources Canada)