Navigation Links
Measuring dispersal -- how well are soft-sediment invertebrate communities connected on the seafloor?

Different types of disturbances to the seafloor can affect both the invertebrates inhabiting them and the critical ecosystem functions they provide us (e.g. nutrient cycling, oxygenation, food for fish). Sebastian Valanko working at the Marine Research Centre of the Finnish Environment Institute (SYKE) has together with colleagues investigated dispersal of invertebrates, critical in both the recovery process following a disturbance and in maintaining patterns of diversity on the seafloor. Sebastian's PhD thesis will be defended at 12.00 on Wednesday 19.12.2012 at bo Akademi University in Finland. The research project has partly been funded by the Academy of Finland.

Measuring dispersal underwater

Valanko's thesis deals with connectivity, by investigating dispersal strategies and mechanisms of benthic invertebrates. Such knowledge on dispersal is scarce, due to the difficulties in actually measuring dispersal directly in nature, and dispersal has not previously been quantified in the Baltic Sea. Different trap-types were used to capture dispersing invertebrates at different sites, while in parallel measuring waves and currents. This required some 1015 dives by Sebastian and his research team in the archipelago close to Tvrminne Zoological Station, in the south of Finland.

Dispersal is essential for recovery of diversity after disturbance

In one experiment recovery was investigated over a year at several sites. In response to small-scale disturbance, initial recruitment is by nearby-dominant species after which other species will arrive from successively further away. Species also differ in their dispersal potential. In practice, this implies that if only one locality is protected it may not be sufficient to ensure that diversity is maintained. Equally important are the other source locations from which individuals continuously arrive from, and therefore maintaining overall patterns of diversity.

Importance of PhD thesis findings

Sebastian's thesis complements more theoretical studies in ecology in demonstrating that having an understanding of how and when individuals are dispersing relative to underlying environmental heterogeneity is key to interpreting how patterns of diversity change across different spatial scales. Such information from nature is critical when predicting responses to, for example, different types of disturbances or management actions in conservation.


Contact: Mr Sebastian Valanko
Academy of Finland

Related biology news :

1. Oceanographers develop method for measuring the pace of life in deep sediments
2. Measuring our carbon footprint
3. Measuring progesterone receptor expression to improve hormone-receptor-positive cancer management
4. Measuring mercury levels: Nano-velcro detects water-borne toxic metals
5. Bringing measuring accuracy to radical treatment
6. Microbial communities shifted dramatically after Deepwater Horizon spill
7. Researchers and communities at risk join forces in volcano study
8. Desert farming forms bacterial communities that promote drought resistance
9. DNA barcoding verified the discovery of a highly disconnected crane fly species
Post Your Comments:
(Date:11/26/2015)... 26, 2015 Research and Markets ( ... Fingerprint Sensors - Technology and Patent Infringement Risk Analysis" ... --> --> Fingerprint sensors using capacitive ... The fingerprint sensor vendor Idex forecasts an increase of ... mobile devices and of the fingerprint sensor market between ...
(Date:11/19/2015)... 19, 2015  Although some 350 companies are actively ... a few companies, according to Kalorama Information. These include Roche ... the market share of the 6.1 billion-dollar molecular testing ... Market for Molecular Diagnostic s .    ... still controlled by one company and only a handful ...
(Date:11/17/2015)... , November 17, 2015 Paris ...   --> Paris from 17 th ... DERMALOG, the biometrics innovation leader, has invented the first combined ... on the same scanning surface. Until now two different scanners ... one scanner can capture both on the same surface. ...
Breaking Biology News(10 mins):
(Date:12/1/2015)... Dec. 01, 2015 ... of the "2016 Europe Cell Surface ... Technologies, Competitive Strategies, Opportunities for Suppliers--France, Germany, ... offering. --> ) has ... Europe Cell Surface Markers: Country Volume and ...
(Date:12/1/2015)...  Symic, a clinical-stage biotherapeutics company developing multiple compounds ... announced that it has secured $25 million in a ... its lead candidates SB-030 and SB-061. The financing was ... all existing major investors, as well as several new ... by Symic to over $43 million since being founded ...
(Date:12/1/2015)... DUBLIN , December 1, 2015 /PRNewswire/ ... the addition of the  "2016 U.K. Virology ... Segment Forecasts for 100 Tests, Supplier Shares ... Opportunities"  report to their offering.  --> ... of the  "2016 U.K. Virology and Bacteriology ...
(Date:11/30/2015)... Dec. 1, 2015  An interventional radiology technique shows promise ... preliminary results of a study being presented today at the ... America (RSNA). --> ... decades by interventional radiologists as a way to stop bleeding ... as a means of treating obesity is new. ...
Breaking Biology Technology: