Navigation Links
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 carried out and at the interior of the estuary (more or less 7 km from Gernika). The long-term studies were undertaken between May 1998 and May 1999, with a monthly sampling (13 samples in total). The short-term studies, on the other hand, were done between 3 May 2001 and 8 of May of the same year, taking samples every other day (8 samples in total). Thanks to the samples taken in both zones, Ms Sarobe was able to compare the trophic relations that living plankton organisms have in areas that are clearly different in terms of both hydrographic and trophic conditions.

From the results of these samples, the researcher came to certain conclusions. On the one hand, Ms Sarobe observed that the increase in phytoplankton in the annual cycle was related to temperature, light, availability of nutrients and the flow of the river, amongst other factors.

With respect to the bacteria, the study of the annual cycle showed that the large biomasses of bacteria were observed in the summertime; with lesser amounts in winter. Moreover, the researcher concluded that the production of bacteria was limited by the sources of food rather than the temperature. The research on short-term changes indicated that the biomass and bacterial production is greater in the interior of the estuary than in the exterior. According to Ms Sarobe, this could all be due to the flow from the water purification plant located near to the interior channel of the estuary.


'/>"/>

Contact: Irati Kortabitarte
iratik@elhuyar.com
34-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

Related biology news :

1. A study by the MUHC and McGill University opens a new door to understanding cancer
2. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
3. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
4. Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces
5. Binghamton University researchers investigate evolving malaria resistance
6. Antioxidant to retard wrinkles discovered by Hebrew University researcher
7. Society for General Microbiology 161st Meeting, University of Edinburgh
8. Boston University biomedical engineers find chink in bacterias armor
9. KAUST and American University in Cairo to collaborate on research and academic development
10. UNH becomes first university in nation to use landfill gas as primary energy source
11. University of Minnesota study refutes belief that black men have more aggressive prostate cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/6/2017)... , May 5, 2017 ... just announced a new breakthrough in biometric authentication ... exploits quantum mechanical properties to perform biometric authentication. These ... smart semiconductor material created by Ram Group and ... finance, entertainment, transportation, supply chains and security. Ram ...
(Date:4/17/2017)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... 2016 Annual Report on Form 10-K on Thursday April 13, 2017 ... ... Investor Relations section of the Company,s website at http://www.nxt-id.com  under ... http://www.sec.gov . 2016 Year Highlights: ...
(Date:4/11/2017)... , Apr. 11, 2017 Research and ... Market 2017-2021" report to their offering. ... The global eye tracking market to grow at a ... report, Global Eye Tracking Market 2017-2021, has been prepared based on ... covers the market landscape and its growth prospects over the coming ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... 2017 SomaGenics announced the receipt of a ... RealSeq®-SC (Single Cell), expected to be the first commercially ... microRNAs) from single cells using NGS methods. The NIH,s ... accelerate development of approaches to analyze the heterogeneity of ... techniques for measuring levels of mRNAs in individual cells ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee is ... honoring scientists who have made outstanding contributions to analytical chemistry and applied spectroscopy. ... world’s leading conference and exposition for laboratory science, which will be held February ...
(Date:10/9/2017)... , ... October 09, 2017 , ... The award-winning American ... broadcast first quarter 2018. American Farmer airs Tuesdays at 8:30aET on RFD-TV. , ... faced with the challenge of how to continue to feed a growing nation. At ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving ... marijuana products targeting the needs of consumers who are incorporating medical marijuana into ... in Phoenix, Arizona. , As operators of two successful Valley dispensaries, The Giving ...
Breaking Biology Technology: