Current issue: 54(4)

Under compilation: 54(5)

Impact factor 1.683
5-year impact factor 1.950
Silva Fennica 1926-1997
Acta Forestalia Fennica

Articles containing the keyword 'fragmentation'.

Category: Research article

article id 568, category Research article
Minna Malmivaara, Irja Löfström, Ilkka Vanha-Majamaa. (2002). Anthropogenic effects on understorey vegetation in Myrtillus type urban forests in southern Finland. Silva Fennica vol. 36 no. 1 article id 568.
The growth of urban population in Finland has resulted in increased fragmentation of urban forests and consequently increased recreational pressure on these forests. The effects of fragmentation and trampling on the ground and field layer vegetation were studied in mesic Myrtillus type Norway spruce-dominated urban forest stands of varying size in the greater Helsinki area. The number of residents living in the vicinity of the forest stands was an important factor affecting the understorey vegetation in urban forests. The cover of understorey vegetation in urban forests was remarkably lower than in rural areas, especially the ground layer cover, e.g. cover of Pleurozium schreberi, was significantly lower in urban forests than in the reference areas. Thus, the ground layer proved to be most susceptible to trampling. In the field layer, the cover of dwarf shrubs, especially of Vaccinium myrtillus, was lower in deteriorated than in undeteriorated urban forest stands.
  • Malmivaara, Finnish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland ORCID ID:E-mail: (email)
  • Löfström, Finnish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland ORCID ID:E-mail:
  • Vanha-Majamaa, Finnish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland ORCID ID:E-mail:

Category: Research note

article id 136, category Research note
Tomasz D. Mazgajski, Michal Zmihorski, Katarzyna Abramowicz. (2010). Forest habitat loss and fragmentation in Central Poland during the last 100 years. Silva Fennica vol. 44 no. 4 article id 136.
The process of habitat fragmentation consists of two components – habitat loss and fragmentation per se. Both are thought to be among the most important threats to biodiversity. However, the biological consequences of this process such as species occurrence, abundance, or genetic structure of population are driven by current, as well as previous, landscape configurations. Therefore, historical analyses of habitat distribution are of great importance in explaining the current species distribution. In our analysis, we describe the forest fragmentation process for an area of 178 km2 in the northern part of Mazowsze region of central Poland. Topographical maps from the years 1890, 1957 and 1989 were used. Over the 100-year period, forest coverage in this area changed from 17% to 5.6%, the number of patches increased from 19 to 42, while the area of the forest interior decreased from 1933 ha to 371 ha. The two components of fragmentation were clearly separated in time. Habitat loss occurred mainly during the first period (1890–1957) and fragmentation per se in the second (1957–1989). Moreover, we recorded that only 47.7% of all the currently (in 1989) afforested areas constitute sites where forests previously occurred (in 1890 and 1957). For forest dwelling organisms characterized by low dispersal abilities, the effective forest coverage seems to be a half of the real forest area in the studied landscape. New afforestations should be planned especially to increase those patches which contain ancient forest, where various plants and animals sensitive to fragmentation may have survived.
  • Mazgajski, Polish Academy of Sciences, Museum & Institute of Zoology, Wilcza 64, PL 00-679 Warsaw, Poland ORCID ID:E-mail: (email)
  • Zmihorski, Polish Academy of Sciences, Museum & Institute of Zoology, Wilcza 64, PL 00-679 Warsaw, Poland ORCID ID:E-mail:
  • Abramowicz, Department of Ecology, University of Warsaw, Banacha 2, PL 02-097 Warsaw, Poland ORCID ID:E-mail:

Category: Article

article id 5032, category Article
Seppo Kellomäki, Heikki Wuorenrinne. (1979). Kaupunkimetsien vaurioitumiseen vaikuttavista tekijöistä. Silva Fennica vol. 13 no. 2 article id 5032.
English title: Factors affecting deterioration of urban forests.

The objective of the study was to investigate the factors affecting the deterioration of urban forests based on literature. Regression analysis is applied to the material obtained from unpublished material of the latter author. The size of forest stand, and its fertility proved to exercise the greater effect on the deterioration of urban forests. A model based on these factors has been developed and its area of applying is discussed.

The PDF includes a summary in English.

  • Kellomäki, ORCID ID:E-mail:
  • Wuorenrinne, ORCID ID:E-mail:

Click this link to register for Silva Fennica submission and tracking system.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content
Your selected articles

Committee on Publication Ethics A Trusted Community-Governed Archive