Studies on the submerged plant community in Lake Biwa. I. Distribution and productivity of Egeria densa. A submerged plant invader in the south basin [Translation from: Physiol.Ecol.Japan 17, 283-290, 1976]

Tanimizu, K. and Miura, T. (1983) Studies on the submerged plant community in Lake Biwa. I. Distribution and productivity of Egeria densa. A submerged plant invader in the south basin [Translation from: Physiol.Ecol.Japan 17, 283-290, 1976]. Windermere, UK, Freshwater Biological Association, (FBA Translations (New Series), 159)

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Abstract

Egeria densa (PLANCH.) ST. JOHN, a submerged plant invader, forms a wide submerged plant zone, particularly along the west coast of the south basin, Lake Biwa. The macrophyte occupies over 82% of the plant zone in the basin and its biomass reaches 93% of the total. The estimated annual net production was approximately 1 kg dry wt./m2 in a dense area, which is about 4.5 times as much as the net production by phytoplankton in an offshore area of the basin. Although the area covered by the macrophyte is only 5.8% of the total of the basin, it produced about one-tenth of the total annual primary production. In the most productive season Egeria produced 46% of the total primary productivity. Thus, the macrophyte never be neglected when one considers the energy flow or material circulation in the basin. This study was initiated in order to clarify the role of submerged macrophytes, particularly E. densa, in Lake Biwa. The following points are reported in this paper: the distribution of macrophytes in the south basin; seasonal change in standing crop of E. densa; seasonal change in values related to production, utilizing a model proposed by Ikushima with its parameters experimentally determined.

Item Type: Monograph or Serial Issue
Title: Studies on the submerged plant community in Lake Biwa. I. Distribution and productivity of Egeria densa. A submerged plant invader in the south basin [Translation from: Physiol.Ecol.Japan 17, 283-290, 1976]
Personal Creator/Author:
CreatorsEmail
Tanimizu, K.
Miura, T.
Series Name: FBA Translations (New Series)
Number: 159
Date: 1983
Publisher: Freshwater Biological Association
Place of Publication: Windermere, UK
Issuing Agency: Freshwater Biological Association
Additional Information: Translated from Japanese into English
Uncontrolled Keywords: Aquatic plants; Introduced species; Macrophytes; Seasonal distribution; Biological production; Japan; Egeria densa
Subjects: Biology
Ecology
Limnology
Item ID: 4991
Depositing User: Hardy B Schwamm
Date Deposited: 24 Mar 2011 10:14
Last Modified: 29 Sep 2011 15:36
URI: http://aquaticcommons.org/id/eprint/4991

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