introduction to the marmic course 2004 mpi bremen awi-sylt
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Introduction to theMarMic Course 2004
MPI Bremen
AWI-Sylt
The Wadden Sea: a threatened Ecosystem?
• Human pressure (fisheries, tourism, etc.)
• Land reclamation
• Invading species
• Climate change / sea level rise
• Eutrophication
Nutrients in the Rhine
1950 1960 1970 1980 1990 2000YEAR
0
10
20
30
40M
ea
n P
ho
sph
ate
loa
d (
mo
l/s)
0
200
400
600
800
1000
Me
an
DIN
loa
d (
mo
l/s)
N
P
Actinocyclus octonarius
Actinoptycus senarius
Coscinodiscus radiatus
Actinoptychus splendens
Actinoptychus splendensRound, Crawford, Mann 1990
Phaeocystis globosa
Phytoplankton, Western Dutch Wadden Sea
0
200
400
600
1940 1950 1960 1970 1980 1990 2000
Year
PP (g
C m
-2 Y
-1)
Data: Cadée, NIOZ
Pleurosigma sp.
Diploneis sp.
Delphineis sp.
Data: Cadee, NIOZ
Phytobenthos, Western Dutch Wadden Sea
0
50
100
150
200
250
1965 1970 1975 1980 1985
Year
PP
(g
C m
-2 Y
-1)
Black Spots
The Course Philosophy
• Provide a multiple perspective on the system– Spatial and Temporal Scales– Different Techniques– Interdisciplinary Approach/Team Work
• Pivot of the experimental work:– Water vs. sediment– Exposed vs. sheltered– Bioturbators: Experimental plots where the occurrence one
of the major “bio-engineers” was manipulated.
• 1. Week Rotation (3 Groups)– Microsensors/Macrobenthos (Henk Jonkers/Nils
Volkenborn)– Chamber/Oxygen Dynamics (Perran Cook/ Steff Hedtkamp)– Water Processes(Tina Löbl/Justus van Beusekom)
• 2. Week: Advanced Biogeochemistry techniques
• Ultimate goal: To put all the pieces together in the form of a Report
Provisional Programme, First Week
• Tuesday: Wadden Sea Excursion (lectures depend on weather)– 07:45 Excursion: Königshafen– 10:30 Lecture: Wadden Sea Hydrography (Justus)– 11:30-13:00 Lunch Break– 13:00 Excursion + Intro on Geology: Morsum/Wenningstedt– 16:00 Preparation for Group Rotation
• Wednesday: Group Rotation
• Thursday: Group Rotation
• Friday: Group Rotation
• Saturday: Presentation of results (three groups) 12:00-13:00– 1) Microsensors/macrobenthos– 2) Chamber-Experiments– 3) Water column processes
• Sunday: Off/Free/Sleep/Check out the Island
Productivity and functioning of sandy sediments and the water column
Comparison of 4 habitats: water column
subtidal sand
bioturbated intertidal
not bioturbated intertidal
subtidal sand “Hausstrand”(day 3)
Lugworm exclusion and control site (day 1 and 2)
water sampling with MS Mya
(Day 1,2 & 3)
Sediment parameters
Organic content
Water content
Chlorophyll a concentration
Permeability
Oxygen dynamics and penetration depth
Microsensors
Chamber incubation
Processes in the water
Macrofauna sampling
Provisional ProgrammeSecond Week
• Monday– 08:00: Water sampling on Mya
– Tim Ferdelman/Volker BrücherBiogeochmical techniques
– Jens Harder Microbiology techniques
• Tuesday: Continuing Biogeochemistry
• Wednesday: Continuing Biogeochemistry
• Thursday:– Departure to Bremen