Status and change of tree crown condition at the CONECOFOR plots, 1996 - 2005
DOI:
https://doi.org/10.12899/asr-900Keywords:
Crown conditions, defoliation, Quality Assurance, temporal trends, transparency.Abstract
Between 1996 and 2005 crown condition at Italian Level II plots was assessed annually within the CONECOFOR programme. Three different assessment forms and manuals were adopted over this period of time (the first in 1996-97, the second between 1998 and 2004, the last starting in 2005); as a result, many of the parameters investigated and the data collected are neither homogeneous nor comparable over time. Since, however, neither the definition nor the assessment criteria for transparency changed, this parameter was chosen to represent crown condition variations over time. (In this survey, transparency is used as a proxy for defoliation.) Yearly field surveys were always preceded by an inter-calibration course, and were followed up by Quality Control surveys done by one or more Reference Teams. After 10 years, the results suggest that statistically significant variations in transparency, from one year to the next, are only scattered and display no recognizable trend. Overall, there were 15 variations, of which 7 were positive (i.e. increase in transparency), and 8 negative (i.e. decrease in transparency). The majority of variations is concentrated in the 1997-98 period. Significant defoliation trends were identified in 11 out of the 27 considered plots. In 4 cases these trends were positive (increased transparency).
References
Aamlid D., Tørseth K., Venn K., Stuanes A.O., Solberg S., Hylen G., Christophersen N., Framstad E., 2000 - Changes of forest health in Norwegian boreal forests during 15 years. Forest Ecology and Management, 127: 103-118.
Bussotti F., Ferretti M., 1998 - Air pollution, forest condition and forest decline in southern Europe. An overview. Environmental Pollution, 101:49-65.
Bussotti F., Ferretti M., Cozzi A., Cenni E., 1998a - Condizioni degli alberi. Valutazione nelle aree permanenti di livello I. Manuale di campagna (Maggio 1998, Revisione 0). Ministero per le Politiche Agricole. Corpo Forestale dello Stato. Roma.
Bussotti F., Ferretti M., Cozzi A., Cenni E., 1998b – Condizioni degli alberi. Valutazione nelle aree permanenti di livello II. Manuale di campagna (Maggio 1998, Revisione 0). Ministero per le Politiche Agricole. Corpo Forestale dello Stato. Roma.
Bussotti F., Ferretti M., Giordano P., Mazzali C., 2000 - A synthetic index to estimate tree condition in the Permanent Monitoring Plots of the CONECOFOR programme. Annali Istituto Sperimentale per la Selvicoltura, Special Issue, Arezzo, Anno 1999, 30: 67-72.
Bussotti F., Gerosa G., Cenni E., Cozzi A., Ferretti M., Bettini D., Nibbi R., 2001 - Le condizioni delle chiome nei boschi italiani. Risultati 1997-2000. Tipografia Coppini, Firenze.
Bussotti F., Cozzi A., Ferretti M., Cenni E., Bettini D., Nibb i R., 2002 - Crown condition assessment at the CONECOFOR Permanent Monitoring Plots. Journal of Limnology, 61 (Supp. 1): 12-18.
Bussotti F., Gerosa G., Cenni E., Cozzi A., Ferretti M., Bettini D., Nibbi R., 2003 - Crown Condition Surveys in Italian Forests: Issues in Reporting Findings. Environmental Monitoring and Assessment, 85: 221-238.
Bussotti F., Bettini D., Cenni E., Cozz i A., Ferretti M., Nibbi R., Capretti P., Stergulc F., Tiberi R., 2005a - Valutazione delle Condizioni delle Chiome. Manuale di campagna (Rev. 1, Giugno 2005). Ministero per le Politiche Agricole, Corpo Forestale dello Stato – Università di Firenze, Dipartimento di Biologia Vegetale. Firenze.
Bussotti F, Pancrazi M, Matteucci G, Gerosa G. 2005b - Leaf morphology and chemistry in Fagus sylvatica L. (beech) trees as affected by site factors and ozone: results from Level II permanent monitoring plots in Italy. Tree Physiology, 25: 211-219.
Cenni E., Cozzi A., Ferretti M., Bussotti F., 1995 - Valutazione delle condizioni degli alberi. Regione Toscana, Firenze.
De Vries W., Klap J.M., Erisman J.W., 2000 - Effects of environmental stress on forest crown condition in Europe. Part I: hypotheses and approach to the study. Water Air and Soil Pollution, 119: 317-333.
Dobbertin M., Ghosh S., Innes J. 1997 - 3.9. Switzerland. In: Müller- Edzardws C., De Vries W., Erisman J.W. (Eds.), Ten years of monitoring forest condition in Europe. UNECE/EC, Brussels, Geneva: 120-124.
Dobbertin M., 2005 - Tree growth as indicator of tree vitality and of tree reaction to environmental stress: a review. European Journal of Forest Researches, 124: 319-333.
Eichhorn J., Icke R., Isenberg A., Paar U., Schönfelder E., 2005 - Temporal development of crown condition of beech and oak as a response variable for integrated evaluations. European Journal of Forest Researches, 124: 335-347.
Ferretti M. (ed.), 1994 - Mediterranean forest trees: a guide for crown assessment. CEC-UN/ECE, Brussels, Geneva.
Ferretti M., Bussotti F., Cozz A., Cenni E., 1995 - Forest decline and environmental pollution in Italy - A critical reassessment. In: Lorenzini G., Soldatini G.F. (Eds.), Responses of plants to air pollution. Agricoltura Mediterranea, n.s: 244-247.
Ferretti M., Bussotti F., Cenni E., Cozzi A., 1999 – Implementation of Quality Assurance procedures in the Italian programs of forest condition monitoring. Water Air and Soil Pollution, 116: 371-376.
Ferretti M., Calderisi M., Bussotti F., 2007 - Ozone exposure, defoliation of beech (Fagus sylvatica L.) and visible foliar symptoms on native plants in selected plots of South-Western Europe. Environmental Pollution, 145: 644-651
Klap J.M., Oude Voshaar J.H., De Vries W, Erisman J.W., 2000 – Effects of environmental stress on forest crown condition in Europe. Part IV: statistical analysis of relationships. Water air Soil Pollution, 119: 387-420.
Maclaughlin S., Percy K., 1999 - Forest health in North America: some perspectives on actual and potential roles of climate and air pollution. Water Air and Soil Pollution, 116: 151-197.
Matyssek R., Innes J.L., 1999 - Ozone – A risk facto fot trees and forests in Europe. Water Air and Soil Pollution 116: 199-226.
MCPFE, 2002 - Improved pan-european indicators for sustainable forest management. MCPFE Expert Level Meeting 7-8 October 2002, Vienna, Austria (http://www.mcpfe.org/documents/r_2007/).
Müller E., Stierlin H.R., 1990 - Sanasilva - Kronenbilder; Couronnes d’arbres; Le chiome degli alberi. Eidgenössische Anstalt für das Forstliche Vesuchswesen, Birmensdorf.
Mülleredzards C., De Wries W., Erismam J.W., 1997 - Ten years of monitoring forest condition in Europe. EC-UN/ECE, Brussels, Geneva.
Pouttu A., Dobbertin M., 2000 - Needle-retention and density patterns in Pinus sylvestris in the Rhone Valley of Switzerland: comparing results of the needle-trace method with visual defoliation assessments. Canadian Journal of Forest Researches, 30: 1973-1982.
Redfern D.B., Boswell R.C., 2004 - Assessment of crown condition in forest trees: comparison of methods, sources of variation and observer bias. Forest Ecology and Management, 188: 149-160.
Seidling W. 2004 - Crown condition within integrated evaluation of Level II monitoring data at the German level. European journal of Forest Researches, 123: 63-74.
Seidling W. 2008 - Signals of summer drought in crown condition data of the German Level I network. European Journal of Forest Researches, 126: 529-544.
Seidling W., Mues V., 2005 - Statistical and geostatistical modeling of preliminary adjusted defoliation on an European scale. Environmental Monitoring and Assessment, 1001: 223-247.
Skärbi L., Ro-Poulsen H., Wellburn F.A.M., Shepp ard L., 1998 - Impacts of ozone on forests: a European perspective. New Phytologist, 139: 109-122.
Solberg S., 2004 - Summer drought: a driver for crown condition and mortality of Norway spruce in Norway. Forest Pathology, 34: 94-104.
UN-ECE, 1998 - Manual on methodologies and criteria for harmonized sampling, assessment, monitoring and analysis of the effects on air pollution on forests. UN-ECE, Brussels, Geneva. Prepared by: Federal Research Centre for Forestry and Forest Products (BFH), Hamburg, Germany.
UN-ECE, 2005 - Manual on Methods and Criteria for Harmonized Sampling, Assessment and Analysis of the Effects of Air Pollution on Forests, Part II, Visual Assessment of Crown Conditions, latest update: 06/2006, available on: http://www. Icp forests.org/pdf/Chapt2_compl06.pdf).
Zarnoch S.J., Bechtold W.A., Stolte K.W., 2004 - Using crown condition variables as indicators of forest health. Canadian Journal of Forest Research 34: 1057-1070.
Zierl B., 2002 - A simulation study to analyse the relation between crown condition and drought in Switzerland. Forest Ecologyand Management, 188: 25-38.
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