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L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception rance Invasive Species And Nutrient Cycling - Lyon, F r Impacts of an Invasive Aquatic Plant on Nitrogen ues Cartier - e 2009 Dynamics in the Hudson River entre Jacqu r décembre Nina Caraco etiens du Ce embre - 1 e 22 e Entre 30 nove

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Page 1: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

ranc

e Invasive Species And Nutrient Cycling

-Ly

on, F

r

Impacts of an Invasive Aquatic Plant on Nitrogen

ues

Cart

ier

-e

2009

p q gDynamics in the Hudson River

entr

e Ja

cqu

rdé

cem

bre

Nina Caraco

etie

ns d

u Ce

embr

e -

1e22

eEn

tre

30 n

ove

Page 2: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

Background: Nitrogen (N) In Rivers-Anthopogenic N load to rivers is large-N ‘retention’ decreases impact of humans on coastal waters -River networks play role in retention

N2

N2

N storage

22e Entretiens du Centre Jacques Cartier - Lyon, F rance30 novembre - 1er décembre 2009

Page 3: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

Coastal Rivers Like Hudson Can HaveAn Important Role In N Retention

NN2

N “Retention” COASTN import

N storage

N export g

22e Entretiens du Centre Jacques Cartier - Lyon, F rance30 novembre - 1er décembre 2009

Page 4: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

Background HudsonBackground Hudson-Moderate Size River (WS = 35 000 km2)

50 km

ranc

e

(WS 35,000 km ) - Mixed Landuse-150 km is both Tidal and

km

-Ly

on, F

r -150 km is both Tidal and Freshwater (TFW Hudson)

ues

Cart

ier

-e

2009 In TFW Hudson

N retention accounts for42oN

entr

e Ja

cqu

rdé

cem

bre -N retention accounts for

~25% of total load.>50% of N retention occurs

VT

etie

ns d

u Ce

embr

e -

1e ->50% of N retention occurs in 5% of area of river(biogeochemical Hot Spots)

N.Y.C.MA

CT

PA

NY

74oW

22e

Entr

e30

nov

e (biogeochemical Hot Spots)

Page 5: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

Hot Spots Are Shallows OccupiedHot Spots Are Shallows OccupiedBy An Invasive Aquatic Plant

ranc

e

INVASIVE PLANTTrapa, floating leaved

i f d

-Ly

on, F

r species, forms dense coverin 5% area of TFW Hudson

ues

Cart

ier

-e

2009 NATIVE PLANT

V lli i SAV

entr

e Ja

cqu

rdé

cem

bre Vallisneria, SAV,

10% area of TFW Hudson

etie

ns d

u Ce

embr

e -

1e22

eEn

tre

30 n

ove

Page 6: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

Aquatic Plants Occur In Large Distinct “Beds”Aquatic Plants Occur In Large Distinct Bedsra

nce

-Ly

on, F

r

Due to tidal water movement

ues

Cart

ier

-e

2009

Due to tidal water movement channel water exchanges with beds

entr

e Ja

cqu

rdé

cem

bre ~5 times in TFW Section

etie

ns d

u Ce

embr

e -

1e Impact Channel = ΔN x water exchange

22e

Entr

e30

nov

e

Page 7: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

So what happens to N In Plant Beds?So what happens to N In Plant Beds?45

ranc

e 30

INμM

-Ly

on, F

r

15

DI

ues

Cart

ier

-e

2009 0

spring summer

entr

e Ja

cqu

rdé

cem

bre

In Trapa beds but not Vallisneria beds N depleted.

etie

ns d

u Ce

embr

e -

1e22

eEn

tre

30 n

ove

Page 8: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

DIN D l ti R l t d T O D l ti dDIN Depletion Related To Oxgyen Depletion and Fate of DIN is Denitrification (N2 Tall and Maranger)

ranc

e 60

ms)

ΔN2

-Ly

on, F

r

30

45μg

atoTN

2

ues

Cart

ier

-e

2009 NO3

NH15

30

ogen

(μTN

entr

e Ja

cqu

rdé

cem

bre NH4

00 150 300 450N

itro

etie

ns d

u Ce

embr

e -

1e Oxygen (uM)

22e

Entr

e30

nov

e

Page 9: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

D il N i d l d f iDaily N retention modeled from continuous oxygen and water exchange measurements

ranc

e-

Lyon

, F

rue

s Ca

rtie

r -

e 20

09en

tre

Jacq

urdé

cem

bre

etie

ns d

u Ce

embr

e -

1e22

eEn

tre

30 n

ove

Page 10: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

N removal In Trapa Beds ~4000 kg/day

And occurs in only 5 km2 of Trapa

ranc

e

And occurs in only 5 km2 of TrapaHow big is this?

-Ly

on, F

r

1. Waste from 800,000 people

2 1 000 000 fish at 0 5 kg/fish

ues

Cart

ier

-e

2009

2. 1,000,000 fish at 0.5 kg/fish

4. 30% of N input to TFW Hudson from watershed

entr

e Ja

cqu

rdé

cem

bre

5. 80% of total N removal in river

6 retention from ~5000 km2 of forest land

etie

ns d

u Ce

embr

e -

1e

6. retention from 5000 km of forest land

22e

Entr

e30

nov

e

Page 11: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

CONCLUSIONS

-Coastal Rivers Can Be Hot Spots of N processing

ranc

e

-Shallows occupied by plants may be very hot -Species invasions can alter N processing

-Ly

on, F

rue

s Ca

rtie

r -

e 20

09en

tre

Jacq

urdé

cem

bre

etie

ns d

u Ce

embr

e -

1e22

eEn

tre

30 n

ove

Page 12: Invasive Species And Nutrient Cycling - Graie › zabr › J-Cartier_dec09 › PPT-final › caraco.pdf · Invasive Species And Nutrient Cycling-Lyon, F Impacts of an Invasive Aquatic

L E S G R A N D S F L E U V E S V O N T A L A M E R De la production de connaissance à la gestion durable d’environnements d’exception

ACKNOWLEDGEMENTACKNOWLEDGEMENT

Roxane Maranger, Laure Tall,Jon Cole, Sally MacIntyre, John Fram, Wade

ranc

e

Sally MacIntyre, John Fram, Wade McGillis, Stuart Findlay, David Strayer, Heather Malcom, Kara Goodwin, Sarah Hazard, Ganesh, Chert,

-Ly

on, F

r , , ,Sea Grant, NSF, Hudson River Foundation

ues

Cart

ier

-e

2009

entr

e Ja

cqu

rdé

cem

bre

etie

ns d

u Ce

embr

e -

1e22

eEn

tre

30 n

ove