NUMERICAL ANALYSIS ON THE POPULATION DYNAMICS OF NETSPINNING CADDIS LARVAE AND THE SUBSTRATUM ADHESION DUE TO THEIR INHABITATION IN A COBBLE RIVER WITH FEWER DISTURBANCES

Autor:	Tetsuro Tsujimoto, Shintaro Watanabe, Takashi Tashiro
Rok vydání:	2005
Předmět:	Flow computation Larva education.field_of_study Cobble Ecology Organic Chemistry Population Adhesion Biology Biochemistry Flow conditions Macrostemum radiatum Environmental capacity education
Zdroj:	PROCEEDINGS OF HYDRAULIC ENGINEERING. 49:1453-1458
ISSN:	1884-9172 0916-7374
DOI:	10.2208/prohe.49.1453
Popis:	Net-spinning caddis larvae set up nests on the substratum in a cobble river. Their abundance is clearly existed on the substratum with fewer disturbances, and moreover causes “substratum adhesion” which suppresses the flux of bed-load transport because they bind a large amount of bed-materials. In this paper, we modeled the population dynamics of the net-spinning caddis larvae (Stenopsyche sp. and Macrostemum radiatum) by taking into account of the different dynamics between the number of their individuals and their individual growths and the conventional knowledge about their responses of emigration, immigration and environmental capacity to various flow conditions. Combining the numerical simulations of the caddis population dynamics and the flow computation in a study reach with our experimental results about the substratum adhesion due to the caddis inhabitations enabled to explain the actual substratum adhesion with temporal changes in the cobble river with fewer disturbances.
Databáze:	OpenAIRE
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