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Exopolymeric secretions in HABs : , diffusion and bioengineering may depend on length on rheology, turbulence, behaviour, chemistry, surface properties at membra Ian R. Jenkinson Tim Wyatt Agence de Conseil et de Recherche Océanographiques, 19320 La Roche Canillac, France. [email protected] Consejo Superior de Investigacion Cientificas, Instituto de Investigaciones Mari 36208 Vigo, Spain. [email protected]
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Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

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Page 1: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Exopolymeric secretions in HABs :

How flow, diffusion and bioengineering may depend on length scale

(as well as on rheology, turbulence, behaviour, chemistry, surface properties at membranes, etc)

Ian R. Jenkinson Tim Wyatt

Agence de Conseil et de Recherche Océanographiques,19320 La Roche Canillac, France.

[email protected]

Consejo Superior de Investigaciones Cientificas,Instituto de Investigaciones Mariñas36208 Vigo, [email protected]

Page 2: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Two vessels with exit holes of radius R

Page 3: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Dry powder of grain“radius” rr << R/5

Two vessels with exit holes of radius R

r >> R/5

Page 4: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Dry powder of grain“radius” rR << 5r

Two vessels with exit holes of radius R

R >> 5r

X Clogs

(Jams)Flows

Page 5: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Vessel with exit hole of radius R

Page 6: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Vessel with exit hole of radius R

Newtonian liquid

Page 7: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Vessel with exit hole of radius R

Flows

Newtonian liquid

Page 8: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Vessel with exit hole of radius R

Assuming no inertial effects

(low Re), flow rate

F ~ /where is hydrostatic pressure and is dynamic viscosity

Flows

Newtonian liquid

Page 9: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Two vessels with exit holes of radius R

Monodisperse liquid or paste

with yield stress Y

Y >> Y <<

Page 10: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Two vessels with exit holes of radius R

Monodisperse liquid or paste

with yield stress Y

Y >> Y <<

X Flows F~-Y)/

GelsF = 0

Page 11: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Summary

Page 12: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

1. Hard, dry suspensions (powders, sand, etc.)Summary

Page 13: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

1. Hard, dry suspensions (powders, sand, etc.)If hole diameter D >> ~5 . grain diameter, thenmaterial flows.Otherwise is jams however high τ.

Summary

Page 14: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

1. Hard, dry suspensions (powders, sand, etc.)If hole diameter D >> ~5 . grain diameter, thenmaterial flows.Otherwise is jams however high τ.

2. Monodisperse materials (liquids, solids, gels...)

Summary

Page 15: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

1. Hard, dry suspensions (powders, sand, etc.)If hole diameter D >> ~5 . grain diameter, thenmaterial flows.Otherwise is jams however high τ.

2. Monodisperse materials (liquids, solids, gels...)

Material properties (viscosity, elasticity, yield stress) constant across all length scales.

Summary

Page 16: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

3. Suspensions of hard particles (spheres, plates, needles, etc.) in a liquid.

Summary

Page 17: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

3. Suspensions of hard particles (spheres, plates, needles, etc.) in a liquid.

Like powders and sands, but they impart extra viscosity to that of the liquid, because of Brownian motion and repulsive charges

Summary

Page 18: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

3. Suspensions of hard particles (spheres, plates, needles, etc.) in a liquid.Like powders and sands, but they impart extra viscosity to that of the liquid, because of Brownian motion and repulsive charges

4. Suspensions of soft particles and bubbles.

Summary

Page 19: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

3. Suspensions of hard particles (spheres, plates, needles, etc.) in a liquid.

Like powders and sands, but they impart extra viscosity to that of the liquid, because of Brownian motion and repulsive charges

4. Suspensions of soft particles and bubbles.Same as above, but increasing τ can cause particles or bubbles to yield in the hole.

Summary

Page 20: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

5. Suspensions of aggregates, flocs, etc. including soft particles aggregated in matricesof softer aggregates (lumpiness)

Summary

Page 21: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

5. Suspensions of aggregates, flocs, etc. including soft particles aggregated in matricesof softer aggregates (lumpiness)

Very complex, but empirically viscosity andyield stress are a negative function of hole size(and probably of length scale in general)

Summary

Page 22: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

5. Suspensions of aggregates, flocs, etc. including soft particles aggregated in matricesof softer aggregates (lumpiness)

Very complex, but empirically viscosity andyield stress is a negative function of hole size(and probably of length scale in general)Maybe natural waters are mostly like this, but with aggregates very dilute and tenuous, compared to, say, what we are used to in foodsor industrial reactors.

Summary

Page 23: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Intertidal organic aggregates

Page 24: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

AiguillonCove

-

Pertuisd’Antioche

Pertuis Breton

Charente

Pertuis de Maumusson

La Rochelle Ré

Oléron

BrouageMudflat

Marennes-OléronBasin

Sèvre Niortaise

Pertuis SeaPampin Mudflat Fluff obtained

here

10 km

Page 25: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

Page 26: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

?? Harmful algae ??

Page 27: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

?? Harmful algae ??

Is this alga-rich fluff suffocating young sole ?

Page 28: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

?? Harmful algae ??

Is this alga-rich fluff suffocating young sole ?

Between birds andsuffocation?

Page 29: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,
Page 30: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Didymosphenia geminata invading New Zealand rivers

Pictures received from Christina Vieglais via Diatom-L list

21 August 2006

Page 31: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

hY

The

Kasumeter

(Yield stress

viscometer)

Page 32: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

The

Kasumeter

But sewage sludge, like pelagic and benthic marine organic aggregates, consist of a hierarchical (quasi-fractal) mixture of exopolymeric flocs, or aggregates

hY

The Kasumeter has been adopted as an EUstandard for measuring the « flowability »of sewage sludges (HORIZONTAL Report No. 21, 2004)

Page 33: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

The

Kasumeter

Yield stress of sewage sludge for different sludge concentrations (%) as a function of tube diameter. (Drawn from data in Spinosa and Lotito (2003) Adv. env. Res. 7:655-659).

hY

Page 34: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mud flatswith fluid mud

Mud flatswith intertidalfluff

Yield stress of sewage sludge for different sludge concentrations (%) as a function of tube diameter. (Drawn from data in Spinosa and Lotito (2003) Adv. env. Res. 7:655-659).

Y ~ d-2

The

Kasumeter

hY

Page 35: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Rheosole ichthyoviscometerJenkinson, Claireaux and Gentien, (2006) Mar. Biol., in press and published online

It gets the scales and measurement geometry right

Page 36: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Procedure:• A dead sole is arranged so that the tap nozzle fits in its mouth• Test material flows from SR to LR through a tap, into the mouth and through the gills of the dead sole• As the material flows, the hydrostatic pressure difference, H(t) (~water level difference) between the water in each cylinder is measured using a pressure probe, and recorded on computer every 0.5 s.

Page 37: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,
Page 38: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Rheosole ichthyo-viscometerPlots of hydrostatic pressure difference P vs. time t, obtained with the ichthyoviscometer.

P increased by 10 Pa

Pure seawaterLog-lin

Pure seawaterLin-lin

50% fluff [POM]=(8.4 g.L-1)Lin-lin

1 cm water ~ 100 Pa

50% fluff [POM]=(8.4 g.L-1)Log-lin

Page 39: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Rheosole ichthyo-viscometerPlots of hydrostatic pressure difference P vs. time t, obtained with the ichthyoviscometer.

P increased by 10 Pa

Pure seawaterLog-lin

Pure seawaterLin-lin

50% fluff [POM]=(8.4 g.L-1)Lin-lin

1 cm water ~ 100 Pa

50% fluff [POM]=(8.4 g.L-1)Log-lin

Straight line for log(Y) vs t

Page 40: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Juvenile sole (25 g)can produce a cross-gill hydrostatic pressure P of ~30 Pa

So if Y > P they can'tventilate

Rheosole ichthyo-viscometer

Page 41: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

From Žutić and Svetličić in CIESM, 2006, Workshop Monograph N° 28(Cambados)

Page 42: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,
Page 43: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Adriatic – artist's impression

Page 44: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mucus event in Adriatic, 1983. Giant mucus streamer in 5 m depth.

Field of view approx. 8 m2 (Stachowitsch, 1984)

Page 45: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Adriatic: Normal appearance of benthos, 1983 (Stachowitsch, 1984)

Page 46: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Adriatic: Mare sporco mucus event, 1983. Sponge with mucus cover, and entangled crab. (Stachowitsch, 1984)

Page 47: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

J. Plankt. Res., 17: 2251-2274 (1995)

Viscous modulus(µPa) (Viscosity at shear rate = 1/s)measured in aCouette rheometer

Page 48: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Mitigation of cytotoxicity, rheotoxicity and fish mortality caused by two species of

Gymnodinium

Ian R. Jenkinson, ACRO, Franceand Geneviève Arzul, IFREMER, France

HAB 2000, Hobart, 2000

Page 49: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Seabass: Seawater

0.1

1

10

-50 0 50 100 150 200 250 300

Water height difference(cm). Note log scale.

Pure seawater

1 cm water ~

100 Pa

t (s)

Page 50: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Pure seawater

1 cm water ~

100 Pa

Seabass: G. mikimotoi (Origin: Tinduff, France)

0.1

1

10

-500 0 500 1000 1500 2000 2500 3000

Time (s)

Waterheight diff .(cm) Notelog scale

1 cm water ~

100 Pa

Quasi yield-stress behaviour

Page 51: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

“Error” bar is SD n = 3

Yield strength (cm water) of seawater and cultures before and after treatments (second batch of experiments)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5

Yield strength (cm water)

G. mik + 0.01mM AC

G. mik + 0.1mM AC

G. mag (10,000/mL)

G. mag+ 0.01mM AC

G. mag + 0.01mM EC

G. mik (23,000/mL)

Page 52: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Yield strength (cm water) of seawater and cultures before and after treatments (second batch of experiments)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5

Yield strength (cm water)

G. mik + 0.01mM AC

G. mik + 0.1mM AC

G. mag (10,000/mL)

G. mag+ 0.01mM AC

G. mag + 0.01mM EC

G. mik (23,000/mL)

“Error” bar is SD n = 3

Juvenile sole (25 g)can produce a cross-gill hydrostatic pressure P of ~30 Pa

So if Y > P they can'tventilate

Rheosole ichthyo-viscometer

Viscous modulus(µPa) (Viscosity at shear rate = 1/s)measured in aCouette rheometer

Page 53: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Yield strength (cm water) of seawater and cultures before and after treatments (second batch of experiments)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5

Yield strength (cm water)

G. mik + 0.01mM AC

G. mik + 0.1mM AC

G. mag (10,000/mL)

G. mag+ 0.01mM AC

G. mag + 0.01mM EC

G. mik (23,000/mL)

“Error” bar is SD n = 3

Juvenile sole (25 g)can produce a cross-gill hydrostatic pressure P of ~30 Pa

So if Y > P they can'tventilate

Rheosole ichthyo-viscometer

Viscous modulus(µPa) (Viscosity at shear rate = 1/s)measured in aCouette rheometer

POM ~Order 1-5 mg.L-1

Page 54: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Y is comparable in the intertidal fluffand in the Karenia mikimotoi culture,but the K.mikimotoi culture is around 1000 times less concentrated in POM

Page 55: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

=

Karenia mikimotoitrapped intheir mucusin a 200µmnet.

The mucussticks to, and clogsa plankton net, but notfish gills.

Page 56: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

-4

+3L

og k

olm

ogor

ov L

(m

)

Log rms shear rate (s -1) -4 +3

with 0.5 mm bubbles

With 0.1 mm bubbles

North Sea water

(off Heligoland)

Mediterranean water (off Villefranche)

newtonian

Redrawn from Jenkinson (1993) Oceanol. Acta, 16: 317-334

Page 57: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

But what aboutlength-scale dependenceof the rheological properties ??

Page 58: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

-4

+3L

og k

olm

ogor

ov L

(m

)

Log rms shear rate (s -1) -4 +3

with 0.5 mm bubbles

With 0.1 mm bubbles

North Sea water

(off Heligoland)

Mediterranean water (off Villefranche)

newtonian

Redrawn from Jenkinson (1993) Oceanol. Acta, 16: 317-334

Page 59: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,
Page 60: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

The amount and timing of exopolymer production bydifferent algae is found to be extremely variable, both in culture and in the field: it's hard to deduce generalrules.

Page 61: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Some allelopathic algae may be using the changes in diffusion induced by exo-slime to reduce wastage ofallelopathic substances, and help deliver them to their targets

Page 62: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Cysteine

Page 63: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Presented at HAB2000 (Hobart)

Page 64: Exopolymeric secretions in HABs : How flow, diffusion and bioengineering may depend on length scale (as well as on rheology, turbulence, behaviour, chemistry,

Please note it down now !

The Fourth Plankton Symposium PS IV&

Congresso Brasileiro de Pláncton

01 – 05 APRIL 2007

JOÁO PESSOA, BRAZIL

http://planktonsymposium.web.ua.pt