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Papers by Harry Helmisaari

The paper presents results from a literature study on autecological characteristics of North Euro... more The paper presents results from a literature study on autecological characteristics of North European and Asian boreal and boreo-nemoral tree species. It also provides general ecological information about the main forest types in the boreal region of the USSR and Fennoscandia. The work has been mainly done during the Young Scientist's Summer Program of 1988 and is a part of the Biosphere Dynamics Project activities. Species natural history data have been collected and assembled in such a way that they can be used in parameterization and modification of existing (or new-formulated) mixed-species forest stand simulators (e.g., gap models). The ecological survey involves 27 tree species divided into two groups. The first one, called "dominant tree species", includes 13 major forest-forming species of the present-day boreal forests of the USSR and Fennoscandia, while the second one, "important species", contains species which either dominate forests at the boreal...

Liitteet: Liite 1. Tutkimusosapuolet ja yhteistyo (s. 26-27) Liite 2. HAVINA -hankkeeseen liittyv... more Liitteet: Liite 1. Tutkimusosapuolet ja yhteistyo (s. 26-27) Liite 2. HAVINA -hankkeeseen liittyvat julkaisut ja esitelmat (s. 28-31) Liite 3. HAVINA – Vieraslajiportaali 4 s. URN:NBN:fi-fe201702011419 (Luonnontieteellinen keskusmuseo – Luomus). Liite 4. Sisallontuotto-ohje vieraslajiportaaliin. 10 s. URN:NBN:fi-fe201702011418 (Luomus) Liite 5. Haitallisten vieraiden kala-, rapu- ja nisakaslajien leviaminen, tietoisuuden lisaaminen ja hallinta (HAVINA osaraportti) 76 s. URN:ISBN:978-952-303-111-1 (RKTL) Liite 6. Sisavesien vieraslajit – vesikasvit. 15 s. URN:NBN:fi-fe201701311402 (SYKE vesikeskus) Liite 7. Selvitys meriteitse Suomeen kulkeutuvien vieraslajien saapumisreiteista. 11 s. URN:NBN:fi-fe201701311401 (SYKE merikeskus) Liite 8. Ruohovartisten koristekasvien leviamiskartoitus ja -ennuste olemassa olevien havaintojen perusteella. 16 s. URN:NBN:fi-fe201701311399 . (MTT, Kasvintuotannon tutkimus, Piikkio & Jokioinen) Liite 9. Vieraslajien torjunta Lounais-Suomessa –hyvat kaytannot. 43 s. URN:ISBN:978-952-257-811-2 (Varsinais-Suomen Elykeskus) Liite 10. Kasvintuhoojien leviamisvaylat ja kasvintuhoojien uhkaaman tuotannon arvo 76 s. ( rinnakkaistallenne ) (EVIRA & MTT, taloustutkimus) Liite 11. Ohjeistus vieraslajien torjunnan taloudelliseen arviointiin 33 s. URN:ISBN:978-952-487-528-8 (MTT, taloustutkimus & IEEP) Liite 12. Instruments for financing action on invasive alien species (IAS). 45 s. URN:NBN:fi-fe201701311400 . (IEEP & MTT, taloustutkimus) Liite 13. Suomen luonnonsuojeluliiton tehtavat HAVINA-hankkeessa. 5 s. URN:NBN:fi-fe201702011420

Fig. 1 and 2. Impatiens glandulifera in an Alnus stand in Helsinki, Finland, and close-up of the ... more Fig. 1 and 2. Impatiens glandulifera in an Alnus stand in Helsinki, Finland, and close-up of the seed

Frontiers in Applied Mathematics and Statistics

Science-based strategies to tackle biological invasions depend on recent, accurate, well-document... more Science-based strategies to tackle biological invasions depend on recent, accurate, well-documented, standardized and openly accessible information on alien species. Currently and historically, biodiversity data are scattered in numerous disconnected data silos that lack interoperability. The situation is no different for alien species data, and this obstructs efficient retrieval, combination, and use of these kinds of information for research and policy-making. Standardization and interoperability are particularly important as many alien species related research and policy activities require pooling data. We describe seven ways that data on alien species can be made more accessible and useful, based on the results of a European Cooperation in Science and Technology (COST) workshop: (1) Create data management plans; (2) Increase interoperability of information sources; (3) Document data through metadata; (4) Format data using existing standards; (5) Adopt controlled vocabularies; (6) Increase data availability; and (7) Ensure long-term data preservation. We identify four properties specific and integral to alien species data (species status, introduction pathway, degree of establishment, and impact mechanism) that are either missing from existing data standards or lack a recommended

Management of Biological Invasions, 2016

In a world where invasive alien species (IAS) are recognised as one of the major threats to biodi... more In a world where invasive alien species (IAS) are recognised as one of the major threats to biodiversity, leading scientists from five continents have come together to propose the concept of developing an international association for open knowledge and open data on IAS-termed "INVASIVESNET". This new association will facilitate greater understanding and improved management of invasive alien species (IAS) and biological invasions globally, by developing a sustainable network of networks for effective knowledge exchange. In addition to their inclusion in the CBD Strategic Plan for Biodiversity, the increasing ecological, social, cultural and economic impacts associated with IAS have driven the development of multiple legal instruments and policies. This increases the need for greater coordination , cooperation , and information exchange among scientists, management, the community of practice and the public. INVASIVESNET will be formed by linking new and existing networks of interested stakeholders including international and national expert working groups and initiatives, individual scientists, database managers, thematic open access journals, environmental agencies, practitioners, managers, industry, non-government organisations, citizens and educational bodies. The association will develop technical tools and cyberinfrastructure for the collection, management and dissemination of data and information on IAS; create an effective communication platform for global stakeholders; and promote coordination and collaboration through international meetings, workshops, education, training and outreach. To date, the sustainability of many strategic national and international initiatives on IAS have unfortunately been hampered by time-limited grants or funding cycles. Recognising that IAS initiatives need to be globally coordinated and ongoing, we aim to develop a sustainable knowledge sharing association to connect the outputs of IAS research and to inform the consequential management and societal challenges arising from IAS introductions. INVASIVESNET will provide a dynamic and enduring network of networks to ensure the continuity of connections among the IAS community of practice, science and management.

A Systems Analysis of the Global Boreal Forest, 1992

Forest Ecology and Management, 1991

Autecological data for north European trees were compiled from literature, field observations and... more Autecological data for north European trees were compiled from literature, field observations and comparisons of species distributions with bioclimatic maps. When compared with an independent dataset for the same species in montane south-central Europe, individual descriptors showed widely varying between-set correlations. Qualitative life-history descriptors were usually consistent between datasets; inconsistent shade-tolerance assignments (Acerplatanoides, Fraxinus excelsior) may reflect overlooked changes in tolerance with age. Species' estimated bioclimatic limits were poorly correlated between datasets. Forest succession models will gain reliability by eliminating unreliable descriptors such as maximum tree diameter, dealing appropriately with ontogenetic changes in key attributes such as shade tolerance, and incorporating climate-response functions based on explicit physiological constraints.

Frontiers in Applied Mathematics and Statistics

Management of Biological Invasions, 2016

A Systems Analysis of the Global Boreal Forest, 1992

Forest Ecology and Management, 1991