References
- 1. Anderson, M.C. (1964). Studies of the woodland light climate I. The photographic computation of light condition. Journal of Ecology, 52, pp. 27-41.
- 2. Arias, D., Calvo-Alvarado, J., Dohrenbusch, A. (2007). Calibration of LAI-2000 to estimate leaf area index (LAI) and assessment of its relationship with stand productivity in six native and introduced tree species in Costa Rica. Forest Ecology and Management, 247, pp. 185-193.
- 3. Augustaitis, A., Mozgeris, G., Eigirdas, M., Sajonas, M. (2009). Color Infrared Aerial Images to Evaluate Tree Crown Defoliation. Rural development 2009: the fourth international scientific conference, 15-17 October, 2009, Akademija, Kaunas region, Lithuania: proceedings. 4, pp. 213-216.
- 4. Augustaitis, A. (2011). Impact of Meteorological Parameters on Responses of Pine Crown Condition to Acid Deposition at Aukštaitija National Park. Baltic Forestry, 17, pp. 205-214.
- 5. Augustaitis, A., Augustaitienė, I., Kliučius, A., Pivoras, G., Šopauskienė, D., Girgždienė, R. (2010a). The seasonal variability of air pollution effects on pine conditions under changing climates. European Journal of Forest Research, 129, pp. 431-441.
- 6. Augustaitis, A., Šopauskienė, D.; Baužienė, I. (2010b). Direct and Indirect Effects of Regional Air Pollution on Tree Crown Defoliation. Baltic Forestry, 16, pp. 23-34.
- 7. Augustaitis, A., Bytnerowicz, A., Paoletti, E. (2014). Biological reactions of forests to climate change and air pollution. Environmental Pollution, 184, pp. 657-658.
- 8. Bringmark, L., Lundin, L., Augustaitis, A., Beudert, B., Dieffenbach-Fries, H., Dirnböck, T., Grabner, M.Th., Hutchins, M., Kram, P., Lyulko, I., Ruoho-Airola, T., Váňa, M. (2012). Trace Metal Budgets for Forested Catchments in Europe—Pb, Cd, Hg, Cu and Zn. Water Air and Soil Pollution, 224, pp. 1502-1-14.
- 9. Breda, N.J. (2003). Ground-based measurements of leaf area index: a review of methods, instruments and current controversies. Journal of Experimental Botany, 54, pp. 2403-2417.
- 10. Chianucci, F., Cutini, A. (2012). Digital hemispherical photography for estimating forest canopy properties: current controversies and opportunities. iForest, 5, pp. 290-295.
- 11. Chen, M.J., Rich, M.P., Gower, T., Norman, M.J., Plummer, S. (1997). Leaf area index of borel forests: Theory, techniques and measurements. Journal of Geophysical Research: Atmospheres, pp. 29429-29443.
- 12. Eklundh, L., Johansson, T. and Solberg, S. (2009). Mapping insect defoliation in Scots pine with MODIS time-series data. Remote Sensing of Environment, 113, pp. 1566–1573.
- 13. Evans, G.D., Coombe, D.E. (1959). Hemispherical and woodland canopy photography and the light climate. Journal of Ecology, 47, pp. 103-113.
- 14. Holmberg, M., Vuorenmaaa, J., Poschb, M., Forsius, M., Lundin, L., Kleemola, S., Augustaitis, A., Beudert, B., Wit, H.A. de; Dirnböck, T., Evansh, C.D., Frey, J., Grandin, U., Indriksone, I., Krám, P., Pompei, E., Schulte-Bisping, H., Srybny, A., Váňa, M. (2012). Relationship between critical load exceedances and empirical impact indicators at Integrated Monitoring sites across Europe. Ecological Indicators, 24, pp. 256-265.
- 15. Jonckheere, I., Fleck, S., Nackaerts, K., Muys, B., Copin, P., Weiss, M., Baret, F. (2004). Review of methods for in situ leaf area index determination: Part I. Theories, sensor and hemispherical photography. Agricultural and Forest Meteorology, 121 (1-2), pp. 19-35
- 16. Marozas, V., Augustaitis, A., Armolaitis, K., Kliučius, A., Pilkauskas, M. (2014). Effects of planted European beech on the understory in Scots pine forests of Lithuania. iForest, 7, pp. 12-18.
- 17. Morsdorf, F., Kotz, B., Meier, E., Itten, K., Allgower, B. (2006). Estimation of LAI and fractional cover from small footprint airborne laser scanning data based on gap fraction. Remote Sensing of Environment, 104, pp. 50–61.
- 18. Mozgeris, D., Augustaitis, A., Augustaitienė, I., Mozgeris, G., Makūnas, T. (2011a). Effect of Rapidly Changing Meteorological Parameters on Over-matured Scots Pine Tree Growth in Aukštaitija National Park. Rural development 2011: the fifth international scientific conference, 24-25 November, 2011, Akademija: proceedings. 5, pp. 98-102.
- 19. Mozgeris, G., Augustaitis, A., Gečionis, A. (2011b). Small Format Aerial Images to Estimate the Pine Crown Defoliation. Rural development 2011: the fifth international scientific conference, 24-25 November, 2011, Akademija: proceedings. 5, pp. 452-458.
- 20. Norman, J.M., Campbell, G.S. (1989). Canopy structure. In: Pearcy R.W., Ehlringer J., Mooney H.A., Rundel P.W. (Eds.), Plant Ecology: Field Methods and Instrumentation. Chapman and Hall, London, pp. 301-325.
- 21. Paoletti, E., Augustaitis, A., Bytnerowicz, A., Bucher, J., Ferretti, M., Johnson, D., Karnosky, D., Mankovska, B., Muller - Starck, G., Percy, K. (2003). State of science and knowledge gaps with respect to air pollution impacts on forests. Ekologia, 22, pp. 8-17.
- 22. Pociene L., Augustaitis A., Augustaitienė I., Kliučius A., Pivoras G. (2011). Effect of Meteorological Parameters on Scots Pine Crown Condition in Aukstaitija National Park. Rural development 2011: the fifth international scientific conference, 24-25 November, 2011, Akademija: proceedings. 5, pp. 111-116.
- 23. Pokorny, R., Stojnič, S. (2012). Leaf area index of Norway spruce stand in relation to its age and defolation. Beskydy, 5 (2), pp. 173-180.
- 24. Rich, P.M. (1990). Characterizing plant canopies with hemispherical photographs. Remote sensing Reviews, 5 (1), pp. 13-29.
- 25. Qi, Y., Jin, G., Liu, Z. (2013). Optical and litter collection methods for measuring leaf area index in an old-growth temperate forest in northeastern China. Journal of Forest Research. 18, pp 430-439.
- 26. Ryu, Y., Sonnentag, O., Nilson, T., Vargas, R., Kobayashi, H., Wenk, R., Baldocchi, D.D. (2010). How to quantify tree leaf area index in an open savanna ecosystem: A multi-instrument and multi-model approach. Agricultural and Forest Meteorology, 150, pp. 63-76.
- 27. Sampson, D.A., Allen, H.L. (1995). Direct and indirect estimates of Leaf Area Index (LAI) for lodgepole and loblolly pine stands. Tree, 9 pp. 119-122.
- 28. Smith, M.L., Anderson, J., Fladeland, M. (2008). Forest Canopy Structural Properties in C.M. Hoover (ed.) Field Measurements for Forest Carbon Monitoring, © Springer Science + Business Media B.V., pp. 179-196.
- 29. Solberg, S., Naessset, E., Hanssen, K.H. and Christiansen, E. (2006). Mapping defoliation during a severe insect attack on Scots pine using airborne laser scanning. Remote Sensing of Environment, 102, pp. 364–376.
- 30. Thomas, S.C., Winner, W.E. (2000). Leaf area index of an old-growth Douglas-fir forest estimated from direct structural measurements in the canopy. Canadian Journal of Forest Research, 30(12), pp. 1922-1930.
- 31. Thimonier, A., Sedivy, I., Schleppi, P. (2010). Estimating leaf area index in different types of mature forest stands in Switzerland: a comparison of methods. European Journal of Forest Research, 129, pp 543–562.
- 32. UN-ECE. (1994). Manual on methods and Criteria for Harmonised Sampling, Assessment, Monitoring and Analysis of the Effects of Air Pollution on Forests. ICP, 178 p.