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:3/20/2017)... At this year,s CeBIT Chancellor Dr. Angela Merkel ... came to the DERMALOG stand together with the Japanese Prime Minster Shinzo ... At the largest German biometrics company the two government leaders could see ... as well as DERMALOG´s multi-biometrics system.   Continue ... ...
(Date:3/9/2017)... SAN FRANCISCO and MOUNTAIN VIEW, ... Zipongo , "Eating Well Made Simple," and 23andMe ... to help guide better food choices.  Zipongo can now ... only their food preferences, health goals and biometrics, but ... to certain food choices. Zipongo,s personalized food ...
(Date:3/2/2017)... , March 2, 2017 Summary ... better understand Merck KGaA and its partnering interests and ... https://www.reportbuyer.com/product/3605601/ Description The Partnering Deals and Alliance ... partnering activity of one of the world,s leading life ... prepared upon purchase to ensure inclusion of the most ...
Breaking Biology News(10 mins):
(Date:3/22/2017)... , March 22, 2017 ... fragmented, states a research report by Transparency Market Research ... Inc., Amgen Inc., and AbbVie Inc., accounted for a ... The prominent players in this market are focusing aggressively ... product portfolio, which is likely to lead to market ...
(Date:3/22/2017)... 22, 2017   Boston Biomedical , an industry ... to target cancer stemness pathways, today announced its Board ... as Chief Executive Officer, effective April 24, 2017. ... Li , M.D., FACP, who has led Boston Biomedical ... his leadership, Boston Biomedical has grown from a "garage ...
(Date:3/22/2017)... , ... March 21, 2017 , ... Okyanos Cell Therapy ... as part of their live events series, “Stem Cell Therapy: The Next Phase in ... under the 2013 Stem Cell Research and Therapy Act, Okyanos maintains a ...
(Date:3/22/2017)... , ... March 21, 2017 , ... ... , more than tripling its goal and raising over $30,000 in the first ... that grows nutritious veggies & herbs fast, easy, and affordably, anywhere. , “Simply ...
Breaking Biology Technology: