TY  - CONF
AU  - Hammel, Joerg
AU  - Heer, C.
AU  - Herzen, Julia
AU  - Beckmann, Felix
AU  - Filatov, M.
AU  - Kaandorp, Jaap
AU  - Nickel, Michael
TI  - 3D-topology of a poriferan leuconoid aquiferous system studied by quantitative analysis of micro-tomography data
M1  - PUBDB-2017-07998
PY  - 2011
AB  - The aquiferous system of the Porifera represents the interface between the sponge andits environment. It is involved in ingestion, excretion, gas exchange, etc. Our knowledgeincludes general aspects of canal architecture, cellular anatomy and limited models onthe flow generated by choanocytes. Some studies indicate complex topologies and flowregimes, but we lack complete 3D reconstructions. Our study aimed at analyzing thecanal system anatomy of Tethya wilhelma (Demonspongiae, Hadromerida) and atreconstructing the 3D topology.We used synchrotron radiation based x-ray micro tomography scans (SR-µCT atGKSS/DESY, Hamburg) of canal system corrosion casts and virtual casts to generatehigh resolution 3D reconstructions of canal system replicates using ImageJ and VGStudioMax. Hierarchical classification of canals and additional morphometric parameterswere calculated using a custom developed software.The 3D topologies based on micro tomography image stacks were analyzedquantitatively and provided information on canal diameter, length, branching angle andspacing between branches in correlation to a hierarchical classification of canals. Due to the presence of larger bypass elements forming ring structures in the canals system,hierarchical classification of canals were applied only to a subsets of the data. Betweendifferent hierarchical levels the canal diameter scaled by varying factors. On anorganismic scale the aquiferous system resembles a highly efficient fluid transportsystem offering minimal resistance to flow. We assume that localized flow modificationsby the sponge occur. This is congruent with our 3D-analysis, which demonstratedalternative flow-pathways on a more global scale. Our high resolution 3D models ofpartial and entire canal systems are an important step towards the first computationalfluid dynamics models. They will allow us a deeper insight into the anatomical basis ofsponge behaviour and ecology. Morphometric analysis of these models probably mightprovide new characters for demosponge systematics in the future.
T2  - Biosystematics 2011, Symposium: “New Frontiers in Moprhology: Potential Limits of Synchrotron/High Energy Radiation”
CY  - 21 Feb 2011 - 27 Feb 2011, Berlin (Germany)
Y2  - 21 Feb 2011 - 27 Feb 2011
M2  - Berlin, Germany
LB  - PUB:(DE-HGF)6
UR  - https://bib-pubdb1.desy.de/record/331672
ER  -