Type of research: basic Duration from: 06/30/92. Papers on project (total): 27
Institution name: Šumarski institut, Jastrebarsko (24) Department/Institute: Department of Forest Typology Address: Streljačka 1 City: 10000 - Zagreb, Croatia
Communication
Summary: The energy balance of forest types is established using the
analysis of the general climatic conditions in Croatia, the microclimatic
circumstances in the individual forest associations, the multitude of
plants and their volumes above ground, and the quantity of the humus in
the soil. Twelve permanent and a number of tamporary microclimatic
stations in different forest associations have been stablished with the
objective of determining the strength and impacts of the insolation in the
forests of different floral composition and structure. Between 1992 and
1995 it was established that the mean monthly values of the microclimatic
elements and amplitudes were essentially different in different forest
associations and under different conditions of forest tree crown
projections. Within the soil the temperature regime down to 30 cm depth is
determined by the floral composition and the temperature regime of the air
above the ground, while at greater depths it is determined by the water
regime in the soil. A map of pluviothermal indexes of climate suitability
for Croatian forest vegetation has been made. Plant heterogenety and
volume of the parts above ground in the ground layer of different forest
associations have been determined. There has been one invention and a
considerable number of reports published in journals and books. The first
phase (manuscript) of the energy balance map for different regions of
north Croatia has also been made.
Research goals: Goals of researches of energy supply of forest types
are 1.To determine the quantity of solar energy in particular parts of
Croatia, 2.To determine the impact of solar energy on floral composition
of forestcommunities and physiological activity of forest trees, 3.To
elaborate the map of energy supply of forest types of Croatia according to
different climate favourablenesses for forest vegetation. The expected
result is a knowledge of vital energy of forest vegetation resulting from
climate properties and biological properties of plant species. Since that
climate properties result from the available and accepted quantity of
solar energy, and vegetation is of climate-zonal character, it means that
climate, i.e. insolation is a main ecological factor in the occurrence,
development and survival of forest vegetation. The quantity of available
and accepted insolacion is in particular parts of Croatia different and,
hence, the climate favourableness is also different. If wee determine
identical energy supply on regions of identical climate favourablenesses,
the climate favourableness indices will be, as expected indicators, if
not, we will reach new, also valuable knowledge. That, too, is an aim of
research. The contribution of science on research of energy has an
application in forest management in such a way that the major ecological
factor will show us wheather at some locations we use too little or too
much of the forest resourses which can mean either loss or endangering of
production possibilities. It is possible that this will be a way of
improving the health status of forest stands despite the contamination by
traffic and industry. Other information about the project.