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University of the Basque Country research on plankton at Urdaibai
Date:12/9/2009

This release is available in Spanish.

One of the main objectives of marine biology is to understand the trophic food chains involving microbian plankton. That is, to study the sequence of organisms in relation to their nutrition, given that live organisms can be classified from the perspective of nutrition. In this classification each organism is at one level and all these levels are united one to the other, forming a chain. In this succession of stages or levels an organism feeds itself and is devoured. The structure of this food succession or chain is what defines the channelling of energy and organic material at the different levels.

The goal of the research was to study the microbian plankton of the Urdaibai estuary. The author of the thesis is Ms Aitziber Sarobe Egiguren and her work entitled Urdaibai estuarioko plankton mikrobianoaren dinamika trofikoa (The trophic dynamics of microbian plankton in the Urdaibai estuary).

This is an estuary which has great variability, as the tides and river flow considerably affect its hydrological structure. Although a number of studies have been made of the Urdaibai estuary, Ms. Sarobe observed the need to investigate the principal trophic relations of the components of microbian plankton (bacteria, phytoplankton and protozoa) over a brief time scale. Moreover, such analyses or measurements were undertaken at both the interior and exterior of the estuary, as these present very different hydrographic characteristics and trophic situations.

Long-term and short-term studies

To this end, the researcher undertook two studies: one aimed at the annual cycle and the second at studying short-term changes. She studied the annual cycle at the exterior of the estuary. The short-term study, however, was undertaken at two areas: at the same exterior zone in which the annual study was ca
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Contact: Irati Kortabitarte
iratik@elhuyar.com
34-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

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