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| Titel |
Eclipse effects on field crops and marine zooplankton: the 29 March 2006 total solar eclipse |
| VerfasserIn |
G. Economou, E. D. Christou, A. Giannakourou, E. Gerasopoulos, D. Georgopoulos, V. Kotoulas, D. Lyra, N. Tsakalis, M. Tzortziou, P. Vahamidis, E. Papathanassiou, A. Karamanos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 16 ; Nr. 8, no. 16 (2008-08-12), S.4665-4676 |
| Datensatznummer |
250006324
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| Publikation (Nr.) |
 copernicus.org/acp-8-4665-2008.pdf |
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| Zusammenfassung |
| Some effects in the biosphere from the Total Solar Eclipse of 29 March 2006 were
investigated in field crops and marine zooplankton. Taking into account the
decisive role of light on plant life and productivity, measurements of
photosynthesis and stomatal behaviour were conducted on seven important
field-grown cereal and leguminous crops. A drop in photosynthetic rates, by
more than a factor of 5 in some cases, was observed, and the minimum values
of photosynthetic rates ranged between 3.13 and 10.13 μmol CO2 m−2 s−1. The drop in solar irradiance and the increase in
mesophyll CO2-concentration during the eclipse did not induce stomatal
closure thus not blocking CO2 uptake by plants. Light effects on the
photochemical phase of photosynthesis may be responsible for the observed
depression in photosynthetic rates. Field studies addressing the migratory
responses of marine zooplankton (micro-zooplankton (ciliates), and
meso-zooplankton) due to the rapid changes in underwater light intensity
were also performed. The light intensity attenuation was simulated with the
use of accurate underwater radiative transfer modeling techniques. Ciliates,
responded to the rapid decrease in light intensity during the eclipse
adopting night-time behaviour. From the meso-zooplankton assemblage, various
vertical migratory behaviours were adopted by different species. |
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