Energy content of water- and bog-plant associations in the region of Valdivia (Chile) |
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Authors: | L Steubing C Ramírez M Alberdi |
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Institution: | (1) Institut für Pflanzenökologie der Justus-Liebig-Universität, Heinrich-Buff-Ring 38, D-6300 Giessen, B.R.D.;(2) Instituto de Botanica, Universidad Austral de Chile, Valdivia, Chile |
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Abstract: | Summary Mapping the vegetation of the littoral zone of different types of aquatic habitats in the region of Valdivia (Chile) submerged Egerietum densum, the emergent Sagittario-Alismetum and the Scirpetum californiae were found. In the littoral zone of the banados (i.e. lakes) formed by inundation after subsidence the submerged Egerietum densum, the floating-leaved Polygono-Jussiaetum and the emergent Juncetum procerii; the analyzed pond of Mehuin contained the Callitrichetum stagnalis chilensis and the artificial ponds close to La Union the Lemno-Azolletum. The caloric values of 18 hydrophytes showed a decline from the large emergent hydrophytes (3 818 cal/g) to the submerged (2 907 cal/g) and there was also a decrease from the free-floating (3 652 cal/g) to the floating-leaved (3 364 cal/g) and to the submerged plants. In the most eases high caloric values correspond to a high content of lignin (large emergent hydrophytes) or lipids (floating-leaved plants).We thank Mrs. Bölke and Mr. Delgado for technical help and the Universidad Austral de Chile, Valdivia for fluancial support. |
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Keywords: | Caloric value Chemical composition Vascular hydrophytes |
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