Navigation Links
University of Basque Country research study on effects of climate on plankton in the estuaries

The main objective of the research was to gather information on the effects of climate changes and their consequent influence on the hydrological and dynamic characteristics of plankton in the estuaries.

The author of the thesis was Guillermo Aravena Cuevas and his work entitled Impact of climate variability on the pelagic ecosystem of two contrasting estuaries of the Basque coast (Bay of Biscay): a time series analysis. He has studied the estuaries from Bilbao and Urdaibai.

The data was obtained from the environmental monitoring programme that has been undertaken in these two estuaries since 1997. Over the last decade (1997-2006) an environmental monitoring plan of the pelagic ecosystem of the estuaries has been implemented at these estuaries. By using hydrological data (flow, temperature of water and dissolved oxygen) and biological ones (chlorophyll and mesozooplankton), together with meteorological variables (temperature of air and precipitations) and climatic data (Oscillation of the North Atlantic, ONA), the effects of climate changes on the hydrological conditions and the planktonic communities of these estuaries were evaluated.

Time series analysis

Mr Aravena applied a number of the most recent and specific time series analysis methodologies. Time series analysis involves methods that help to interpret a sequence of data measured over determined moments of time, ordered chronologically and, normally, spaced out between each other in a uniform manner. Representative information is extracted from these data, referring both to origins as to the possibility of extrapolating and predicting future behaviour.

In the words of the author of the thesis, the time series analysis methodologies used were suitable for evaluating the changes in the pelagic ecosystems of the Bilbao and Urdaibai estuaries and for determining their relationships with climate factors.

In general, the tendencies of these environmental and biological variables showed significant differences between estuaries and salt marshes. According to Mr Aravena, this demonstrates that the response of estuarial variables and climatic variability may be different due to, amongst other factors, the effects produced by human activity at each estuary.

Mr Aravena observed that the ONA plays an important role in the variations of air temperature and, consequently, in the recorded water temperatures along the Basque coast. As regards the water-atmosphere interaction, the direct effect of air temperature on that of water showed significant differences, depending on the physical and hydrological characteristics in both estuaries.

In the final part of his thesis, Mr Aravena analysed the effects of environmental variables on the dynamics of Acartia populations the dominant component of mesozooplankton in both estuaries. According to the author, the environmental factors and biological interactions appear to influence the distribution and abundance of important components of mesozooplankton such as Acartias. For the first time the presence of A. tonsa was recorded, plankton that has colonised the inner waters of the Bilbao estuary, moreover negatively affecting the abundance of A. clausi. This is due to the fact that the A. tonsa invasive species has displaced the autochthonous one (A. clausi) to the outer zone of the estuary. This has not been the case with the Urdaibai estuary where interior waters have been occupied by A. bifilosa, the more abundant estuarial species in recent decades.


Contact: Irati Kortabitarte
Elhuyar Fundazioa

Related biology news :

1. Louisiana Tech University receives grant to advance women in engineering, science
2. Research network based at University of Toronto gets $5 million boost to speed up cancer detection
3. Boston University engineer to use $2.5 million NIH grant to cells reaction to physical force
4. Tel Aviv University invention busts dust
5. University of Iowa scientists use blood-brain barrier as therapy delivery system
6. Ben-Gurion University Alzheimers researcher demonstrates specific immune response to vaccine
7. Sakayu Shimizu of Kyoto University recipient of 2009 Enzyme Engineering Award
8. Nanyang Technological University and Karolinska Institutet Sweden launch new Ph.D. program
9. University of Toronto study shows disparity of effect of climate change on UV radiation
10. University of Miami receives NIH grant to support novel technology for tissue engineering
11. Alert status area in brain discoved by Hebrew University scientists
Post Your Comments:
(Date:4/11/2017)... 11, 2017 Research and Markets has announced ... report to their offering. ... global eye tracking market to grow at a CAGR of 30.37% ... Tracking Market 2017-2021, has been prepared based on an in-depth market ... landscape and its growth prospects over the coming years. The report ...
(Date:4/5/2017)... Today HYPR Corp. , leading innovator ... of the HYPR platform is officially FIDO® Certified ... architecture that empowers biometric authentication across Fortune 500 enterprises ... over 15 million users across the financial services industry, ... product suites and physical access represent a growing portion ...
(Date:3/30/2017)... 30, 2017 The research team of The ... (3D) fingerprint identification by adopting ground breaking 3D fingerprint minutiae recovery ... of speed and accuracy for use in identification, crime investigation, immigration ... ... A research team ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... Proscia ... be hosting a Webinar titled, “Pathology is going digital. Is your lab ready?” ... pathology adoption best practices and how Proscia improves lab economics and realizes an ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology ... drug designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription ... is able to cross the cell membrane and bind intracellular STAT3 and inhibit ...
(Date:10/10/2017)... International research firm Parks Associates announced today that ... TMA 2017 Annual Meeting , October 11 in Scottsdale, ... security market and how smart safety and security products impact the competitive ... Parks Associates: Smart Home Devices: Main ... "The residential security market has experienced continued ...
(Date:10/9/2017)... ... ... The award-winning American Farmer television series will feature 3 Bar Biologics in ... 8:30aET on RFD-TV. , With global population estimates nearing ten billion people by ... feed a growing nation. At the same time, many of our valuable resources are ...
Breaking Biology Technology: