1,721,083 research outputs found
Comparazione fenologica e fenometrica fra le specie del bosco sempreverde a Quercus ilex L. e della macchia mediterranea
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Map-makings of plant biomass and leaf area index for management of protected areas
No full textAn inventory of the vegetation types of Castelporziano Estate (Rome), including examples of Mediterranean ecosystems in excellent preserved condition, was compiled. Because Leaf Area Index (LAI) changed with forest structure and developmental stages, maximum LAI provided a good estimate of maximum biomass accumulation. Plant biomass estimation, ranging from 61 tons ha-1 to 360 tons ha-1, fitted well into 14 biomass classes; the highest values (from 301 tons ha-1 to 360 tons ha-1) were related to stratified forested vegetation types, including the more mature Pinus pinea plantations, Quercus ilex evergreen forests and broadleaf mixed forests. LAI ranged from 0.5 to 4.5, and changed with forest structure, increasing with the increase of plant biomass. Leaf area index measurements fitted well into nine LAI classes, and the highest values were related to the stratified vegetation types. Biomass and LAI maps might be employed as a computerised mapped information system for natural resource policy, regional planning, and landscape management. Long-term monitoring may easily be achieved by LAI measurements which can be converted to biomass values by the identified relationship between plant biomass and LAI
Indici di valutazione del grado di inquinamento in area urbana. In: Normalizzazione degli Elementi di Valutazione della Vegetazione per lo Studio dell’Impatto Ambientale. A. Pirola (Ed.), Dipartimento di Ecologia del Territorio e degli Ambienti Terrestri, Pavia.
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Analisi degli elementi caratterizzanti il paesaggio di Tolfa e Allumiere (Lazio): carta dell’indice di area fogliare (LAI)
No full textPlant biomass, leaf area index and plant height relationship: analysis of a protected area in the Mediterranean climate region
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