By Reinhard F. Hüttl, K. Bellmann
This quantity summarises the results of an interdisciplinary study programme entitled `Rehabilitation of the ambience of the hot States of Germany - results on Terrestrial Ecosystems'. earlier than the unification of Germany, emission a great deal of SO2 and dirt debris have been as much as 18-fold greater in East than in West Germany. besides the fact that, emission charges have lowered considerably due to the fact that reunification in 1990, a result of breakdown of a big variety of business and especially lignite- fired powerplants and the implementation of fresh air applied sciences. so as to learn the results of those dramatic alterations in atmospheric chemistry on terrestrial ecosystems, complete box reports have been carried out in pine wooded area ecosystems alongside an historical gradient of atmospheric deposition charges within the northeastern lowlands of Germany. the quick and dramatic relief of airborne dirt and dust particle and SO2 emissions bargains a distinct chance to check the function of SO2 and alkaline particle deposition with reference to alterations or harm to woodland ecosystems and no matter if the wooded area stands go back to a nation of resilience. during this recognize, this environment test may be seemed upon as a roof test with no roof.
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Extra info for Changes of Atmospheric Chemistry and Effects on Forest Ecosystems: A Roof Experiment without a Roof
20 kg N ha- I (Schaaf and Hiittl, 1995). In addition, the soil N stores at this site are comparatively high also as a consequence of repeated N fertilization before 1989 (see introduction). , 1995), supported by favorable weather conditions during late summer 1993, had led to an extremely high N supply in the autumn of 1993, proven by needle N contents and needle dry weights (Table 1). This had also produced a remarkable shift in the N:Mg ratio (Figure 8) at Rosa in 1993. At the end of the investigative period, the absolute N contents at Taura were in the same range as at Rosa, but in terms of the N:P ratio (Figure 4) as well as the Mg contents (Figures 7 and 8) Taura is the site with the more balanced nutrition.
4. Blottner, Taunusstein 144~ 160. Hippeli P. 1991. Dungung der Kiefer im nordostdeutschen Tiefland, Ber. aus Forschg. u. , Forschungsanst. f. Forst- u. Holzwirtsch. Eberswalde Vol. 25, 35-43. Hofmann G, Kraul3 H-H. 1988. Die Ausscheidung von Ernahrungsstufen fUr die Baumarten Kiefer und Buche auf der Grundlage von Nadel- und Blattanalysen und Anwendungsmoglichkeiten in der Oberwachung des okologischen Waldzustandes, Sozialistische Forstwirtschaft. 38, 272~ 273. Huttl RF. 1991. Die Nahrelementversorgung geschiidigter Walder in Europa und Nordamerika, Freiburger Bodenkundl.
16,0 Cl E 14,0 OJ oS 12,0 c.. z 10,0 8,0 6,0 1993 1994 1995 Figure 4. Temporal development of the ratio N contents to P contents of Scots pine needles from the three experimental sites. 3. Sulfur During the time of observation, the S contents are on a higher level at Rosa and Taura compared to Neuglobsow (Figure 5). ) average S contents were not exceeded, whereas at Taura and Rosa the S contents indicated anthropogeneous influence. The fluctuations of the S contents are comparatively high at all three sites.
Changes of Atmospheric Chemistry and Effects on Forest Ecosystems: A Roof Experiment without a Roof by Reinhard F. Hüttl, K. Bellmann