Monika Bright's Lab

From salvaEwiki
Revision as of 17:52, 23 February 2020 by SalvaE (talk | contribs) (Emissions in social networks)
Jump to: navigation, search

en:

University of Vienna


Piran

Emissions in social networks

The wooden cubes were covered with bryozoans ...
and diverse sea squirts and anemone
Work in and out of the water in front of the Marine Biology Institute in Piran
This is the BORG in about 4 m depth in front of the institute. Also here we recovered three wooden and one plastic cube.
Another successful recovery
collection of cubes, water and sediment
Wood eating creatures Wood gets degraded by bacteria and fungi but also by animals. While shipworms live in symbiosis with wood degrading, nitrogen fixing bacteria, some isopods and amphipods can digest wood without the help of symbionts. After sampling the wooden cubes we took pictures of all surfaces. The surface of this wooden plate was covered by hydozoans and algae. Only from the inside the occurrence of many shipworms became apparent.
We found all kinds of size classes ranging from less than a few mm to almost 10 cm. This indicates several colonization events, known in Teredo navalis, the species we found here.
All wooden cubes were heavily infested with the amphipod Chelura terebrans (orange) but we detected only a few specimens of Limnoria quadripunctata (white with 4 spots at the rear end).

(Video to be included here)

The colonial ciliate Zoothamnium on wood In collaboration with Branko Cermelj and with the help of Tihomir Makovec we started to measure pH and redox, oxygen and sulfide concentrations found on woodsurfaces with microelectrodes. The goal is to better understand the microhabitat of the co-occurring Zoothamnium species. Zoothamnium niveum has never been found in winter, but we detected another Zoothamnium species on a wood block. Whether this is the aposymbiotic form of Z. niveum, Z. ignavum or Z. alternans we do not know yet. They all look very similar. We fixed them for sequencing in Vienna.
BORG 3 in Strunjan
This is our most shallow sampling site. Renate and Teresa were in the 12 degree cold water to collect the cubes, sediment cores and seawater.

(No text).

(No text).

Work in the lab - Juliana processes the sediment cores in the vicinity of the BORGs. These samples will serve to compare the communities colonizing the wood with communities living in the adjacent sediment.
Work in the lab - Teresa opens the cubes and plates are Juliana takes pictures.