Navigation Links
Measuring dispersal -- how well are soft-sediment invertebrate communities connected on the seafloor?
Date:12/13/2012

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
sebastian.valanko@ymparisto.fi
358-405-296-145
Academy of Finland
Source:Eurekalert

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:
*Name:
*Comment:
*Email:
(Date:4/19/2016)... The new GEZE SecuLogic access ... "all-in-one" system solution for all door components. It can ... door interface with integration authorization management system, and thus ... minimal dimensions of the access control and the optimum ... offer considerable freedom of design with regard to the ...
(Date:4/13/2016)... 2016  IMPOWER physicians supporting Medicaid patients in ... clinical standard in telehealth thanks to a new partnership ... platform, IMPOWER patients can routinely track key health measurements, ... index, and, when they opt in, share them with ... a local retail location at no cost. By leveraging ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... June 24, 2016  Regular discussions on a range of ... between the two entities said Poloz. Speaking at ... Ottawa , he pointed to the country,s inflation target, ... government. "In certain ... institutions have common economic goals, why not sit down and ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... and Mold) microbial test has received AOAC Research Institute approval 061601. , “This ... introduced last year,” stated Bob Salter, Vice President of Regulatory and Industrial Affairs. ...
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the ... at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field Application ... team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding our ...
Breaking Biology Technology: