Marine Ecology

Expeditions and Fieldwork

Polarstern PS101

Aim

The aim of FS Polarstern cruise PS101 was the exploration of the Karasik seamount and a close-by vent mount in the Gakkel ridge area regarding their geological, geochemical and biological features. Our aim on this cruise was sampling of the sponges that inhabit the Karasik seamount. We are going to analyze them in the framework of the Horizon 2020 SponGES project in collaboration with our partners in this project. The main tasks are to assess the diversity, the abundance and the distribution of the sponge species on the Karasik as well as the associated microbial consortia.

Project

H2020 SponGES: Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation

March 2016 to February 2020

http://www.deepseasponges.org/

Location

The Karasik seamount is located in the Nansen basin in the central Arctic (87°N, 60°E).

Ports

Tromsö (Norway), Bremerhaven (Germany)

Date

September 9 – October 23, 2016

Chief-Scientist

Chief Scientist, AWI Bremerhaven: Antje Boetius

GEOMAR-staff on board: FB3-MI: Beate Slaby

Sonne expedition SO254

Research Aim

Our research aim during RV Sonne cruise SO254 was the examination of sponge communities in the southwestern Pacific – from the sunlit surface waters down to the deep sea (~ 5 km water depth).

Besides taxonomy, physiology and chemistry of sponges, especially their associated microbes were in the focus of our research.  A prerequisite for those studies was the ROV Kiel 6000, which not only delivered our samples, but also valuable meta data that in turn allow an analysis of the respective deep-sea sponge habitat. The data of this cruise will represent an important piece in the puzzle for our biogeographical comparison of deep-sea sponge microbiomes in different ocean regions worldwide.

icbm-auf-see.uni-oldenburg.de/en/ueber-mikrobiome-public-tiefsee-viewing-und-fruehstueck/

Project

H2020 SponGES: Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation

March 2016 to February 2020

www.deepseasponges.org

Location

Our journey took place in the southwestern Pacific. More precise in the waters around New Zealand between 174° E und 176° W, from the subtropical province down to Sub Antarctica (29°- 52°S).

Ports

Auckland (Neuseeland) 

Duration

January 26 – February 27, 2017

Chief-Scientist

Prof. Dr. Meinhard Simon,  Institut für Chemie & Biologie des Meeres , Uni Oldenburg

GEOMAR-staff on board:

FB3-MI, Kathrin Busch

Fieldwork

Sponge samples collection in the Costa Brava (Girona, Spain)

Aquarium experiments at CMIMA-CSIC (Barcelona, Spain), in collaboration with Dr. Marta Ribes.

Aim 1. Characterization of the host response to microbes in the Mediterranean sponges Aplysina aerophoba and Dysidea avara

Aim 2. The interaction between the sponge Aplysina aerophoba and the spongivorous Tylodina perversa

Aim 3. Dissolved organic matter processing by the marine sponges Aplysina aerophoba, Agelas oroides, and Dysidea avara and their associated microbes

Aim 4. Ultrastructural investigations of Mediterranean high microbial abundance sponges.

Location and Dates

CMIMA-CSIC (Barcelona, Spain)

15.04.2016-31.07.2016

People involved

Dr. Lucía Pita (expedition coordination, aims 1 and 2); MSc. Yu-Chen Wu (aim 2); Dr. Laura Rix (aim 3); MSc Martin Jahn (aim 4).