1,721,032 research outputs found
Heath species and heathlands of Italy: an analysis of their relationships under the perspective of climate change based on the description of habitats used for the project “Carta della Natura” (Italian Map of Nature).
Full text linkThe project “Italian Map of Nature” (IMN) is dedicated to create an electronic map (GIS) of the environmental state
(quality and vulnerability) of the Italian territory at different scales. Up to now the GIS of IMN is offering maps at a scale 1:50,000.
The environmental quality is estimated on the basis of biological description of habitats that can be mapped at this scale, the vulner-
ability on the basis of variables related to the anthropogenic pressure. In this paper I want to show that the information collected for
creating the data base of habitats for mapping purposes may be useful for getting information related to the climatic niche width of
the species considered habitat indicators. In this paper I consider the heath species characterizing the IMN habitats of Italy in order
to get an indirect estimation of the climatic vulnerability of Italian heathlands. To measure the climatic niche width of the species
I propose a formula that combines the number of habitats (they characterize) with the heterogeneity of the habitats according to their
distribution in altitudinal belts and in biogeographic regions. The results offer parameters on which to base a discussion for policy
conservation of heaths and heathlands in Italy under the perspective of climate change
Quantifying public perceptions on socio-economic development - an example from the Aysen Watershed, Chile
No full textStakeholders are increasingly being involved in decision-making on environmental management and development issues. In this paper we explore the gap between governmental development planning and people’s needs and aspirations in the Aysén Fjord, Chile, an area that is experiencing rapid economic growth. The coastal area of the region is expected to hold 70% of the future expansion of Chilean salmon aquaculture. A questionnaire was submitted to 13–14 year-old students attending the public schools of the area. It aimed at evaluating how much the priorities of the regional government plan of development fit the priorities of the youth part of the population concerning the socio-economic development of the area. Answers were analysed with statistical multivariate methods including clustering and permutation techniques. The results show that there is a relevant gap between the ongoing policy and students’ expectations
Spatial pattern of ecological processes: the role of similarity in GIS applications for landscape analysis.
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Model for the potential natural vegetation mapping of Friuli-Venezia Giulia (Ne Italy) and its application for a biogeographic classification of the region.
No full textProcesses of environmental degradation and opportunities for rehabilitation in Adwa, Northern Ethiopia.
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Can similarity theory contribute to the development of a general theory of the plant community?
No full textIt is shown that a similarity theory (ST) formulated in the context of plant community reasearch can lead to methodological developments based on similarity functions. ST can explain and predict ecosystems states, discover links between the physical-chemical environment and the plant communities at different scales of gegeralization. ST is compared with fuzzy systems theory, which supports similar developments, and it conlcuded that fuzzy set theory could be considered as an extension of similarity theory
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