Terra

Kaukokartoitus mahdollistaa tarkan tiedon tuottamisen metsäluonnon monimuotoisuutta ilmentävistä piirteistä

Sonja Kivinen — 2024-12-15

Up-to-date knowledge of key ecological features that maintain boreal forest biodiversity is essential part of sustainable forest management and conservation measures. However, there is only a limited amount of spatial data available, as the detection of ecologically significant elements using remote sensing is challenging due to their low frequency, scattered occurrence, small size and/or location in the field layer. We studied tree-level discrimination of the keystone species aspen (Populus tremula L.) from other common tree species and detection of deadwood utilizing airborne high-resolution RGB images, multispectral and hyperspectral data and airborne laser scanning (ALS) data. We also tested the predictive accuracy of remote sensing parameters in predicting the aspen epiphytic lichen communities. Our results demonstrate that high-resolution remote sensing data together with machine learning algorithms provide new possibilities for mapping the occurrence and spatial distribution of key ecological features and producing proxies of biodiversity. It should be noted that field work is also needed for model training and evaluation. Moreover, resources and collaboration of different organizations are needed for biodiversity assessment and monitoring over large geographical areas.

Hiilijalanjälki, vihreä nationalismi ja suomalaisen metsän kansallisromanttinen kulttuuriperintö Helsingin Sanomien kirjoituksissa

Juha Ridanpää — 2024-12-15

The forest has long been seen as an integral part of Finnish national identity. At the same time, there have emerged new argumentation in the media that rationalize the link between Finnish ”forest culture” with responsible environmental behavior in a national romantic and nationalistic way. This article discusses how the media intertwines the discourse on global warming and the carbon footprint banally around the discourse of nationalism, especially in the context of Finnish forest culture. The research material includes articles published in Helsingin Sanomat newspaper between 31 October 2018 and 31 January 2020. Using the analysis of newspaper material, the article illustrates how old myths about the Finnish forest are transferred to a new context, i.e. the theme of global climate responsibility, ending in an updated narration in where the age-old Finnishness is intertwined with modern Finnishness.

Olavi Granö maantieteilijänä ja vaikuttajana

Hannu Linkola — 2024-12-15

Karttateos Joensuun kaupungin ja lähiseudun kasvusta

Petteri Muukkonen — 2024-12-15

Mikä motivoi opiskelemaan maantiedettä – ja riittääkö meillä maantieteen opettajia tulevaisuudessa?

Petteri Muukkonen — 2024-12-15

Uutisia ja tiedonantoja

Oskar Rönnberg — 2024-12-15