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The application of the treering chronologies in assessing ecological requirements of Metasequoia glyptostroboides growing in southern Poland

Wilczyński S., Muter E., Wertz B.

Geochronometria

2014

Vol. 41, no. 2

129--135

Metasequoia glyptostroboides is considered to be a species highly resistant to harmful environmental factors. For this reason it has been introduced to the cities. The climate of Krakow differs from that in its natural range in China. The research was focused on 40-year-old trees, planted in Kraków on fertile alluvial soils with a low level of ground water, in the vicinity of the steelworks. During the period of the highest level of air pollution in the 1970s and 1980s, the radial increment of investigated trees showed an increasing trend. At the end of the 1980s, when the emissions were reduced, a decreasing trend in radial growth was recorded. Throughout the entire period of their life the investigated trees have shown high homogeneity of short-term growth reactions. The sensitivity chronology of the trees was characterized by a high representativeness and a strong high-frequency signal. This may indicate that the investigated trees have shown a large sensitivity to climatic factors.The positive effect on the radial growth of Metasequoia had a cold September in the previous year, and also a cold January, April and May in the year of ring formation. Positive impact on the growth of trees had also the high precipitation occurring in April and August, as well as high air humidity in the spring of the year of ring formation. In the period 1974–2011 fifteen signature years were found. The analysis of the climatic conditions in these years confirms the results of the statistical analyses.

Skaner hiperspektralny AISA (Airborne Imaging Spectrometer for Applications) jako narzędzie pozyskiwania informacji o ekosystemie leśnym

Wężyk P., Wertz B., Waloszek A.

Archiwum Fotogrametrii, Kartografii i Teledetekcji

2003

Vol. 13b

485--496

W projekcie FOREMMS (5 FP IST) realizowanym na obszarze kilku państw europejskich w tym i w Polsce (Puszcza Niepołomicka) wykorzystano zobrazowania skanera hiperspektralnego AISA (nalot 13.08.2001) oraz wyniki oznaczeń laboratoryjnych (metoda spektrofotometryczna) barwników zawartych w aparacie asymilacyjnym sosny pospolitej (Pinus silvestris L). Materiał do analiz pochodził z drzew przeciętnych, wybranych i ściętych na powierzeniach monitoringowych projektu FOREMMS. Zakresy 32 kanałów spektralnych skanera AISA zostały dobrane do charakterystyk absorpcji i odbicia promieniowania przez poszczególne barwniki, tj.: chlorofil a i b oraz karotenoidy. Praca wykazała przydatność wysokorozdzielczych obrazów AISA jako cennego źródła danych dla celów szacowania tzw. „indeksów barwników”, w tym szczególnie zawartości chlorofilu w aparacie asymilacyjnym sosny. Analizy laboratoryjne wykazały spadek zawartości chlorofilu w igłach sosny (we wszystkich rocznikach) wraz ze starzeniem się drzew (klasy wieku). Wszystkie obliczone na podstawie zobrazowania AISA indeksy chlorofilu w igłach sosny wykazały tendencję spadkową wraz ze starzeniem się igieł (rocznika I–III). Dla indeksu mSR705 prawidłowość ta była najbardziej wyraźna (współczynnik korelacji Pearsona z oznaczeniami laboratoryjnymi = 0.65). W wyniku analiz przestrzennych GIS wygenerowano mapę numeryczną zawartości chlorofilu w aparacie asymilacyjnym sosen Puszczy Niepołomickiej.

During the FOREMMS (5 FP IST) project, performed in selected EU countries, including candidate country – Poland (Niepolomice Forest), the hyperspectral images made by AISA airborne spectrometer (at 13.08.2003) and results of laboratory (spectrophotometry method) measurements of pigments concentration in Scotch Pine (Pinus sylvestris L.) needles, were used. Samples of Scotch Pine needles were collected from common trees, selected and cut on the FOREMMS monitoring plots. Ranges of the selected 32 spectral channels of AISA spectrometer were specially selected to ensure the correspondence with absorption and reflectance characteristics of pigments i.e.: chlorophyll a, b and carotenoids. The study shows usefulness of high–resolution AISA images as a valuable source of data for estimating “pigments indexes” purposes, especially for estimate concentration of chlorophyll in pine needles. Laboratory analyses demonstrated decrease of chlorophyll content in Scotch Pine needles (all three generation of needles) during growth of tree stand. All of chlorophyll indexes calculated from AISA image had decreasing trend along with the age of needles generation. For mSR705 index this regularity was strongest (Pearson’s correlation coefficient = 0.65). As a result of spatial GIS analyses, the digital map representing concentration of chlorophyll in Scotch Pine needles in Niepolomice Forest, was generated.