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SUSTAINABLE MANAGEMENT OF WETLANDS. Invasive species in the Danube Delta and their impact on species diversity. Teodora Maria ONCIU ROMANIA - “Ovidius” University – Constanta. 2010. The location of the Danube Delta within Romania and Europe

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SUSTAINABLE MANAGEMENT OF WETLANDS

Invasive species in the Danube Delta

and their impact on species diversity

Teodora Maria ONCIU

ROMANIA - “Ovidius” University – Constanta

2010


The location of the Danube Delta

within Romania and Europe

(www.deltafishing.ro/en/intara.html [11February 2009 ])


The Danube is Europe’s second largest river,

2 860 km long, with a drainage basin of 810 000 km2,

covering almost one third of Europe

(major parts of 13 countries with more then 86 million inhabitants)

(www.ddbra.ro/en/danube.php [10 February 2009])


During about the last ten thousand

years the Danube river built,

on its junction with the Black Sea,

an unique wetland in Europe:

the Danube Delta.

The Delta covers a total area of

4 178 km2, shared by Romania (4/5)

and Ukraine (1/5).

There are many large lakes,

as well as the shallow marine waters

that limit the delta, forming a huge

wetland complex covering

more than 6 700 km2.

(Diaconu and Nichiforov, 1963)


The Danube has been connected via several canals with the main

Western Europe Rivers (Rhine, Main, and Odder), facilitating communications

with the North Sea and the Baltic Sea.

After 1984, the opening of the Danube-Black Sea Canal shortened the navigation

route towards the Black Sea by 250 km.

(www.britannica.com/EBchecked/topic-art/84090/... [11 February 2009]


The Danube delta has a continental-temperate climate main

(Paltineanu et al., 2000)

  • great amplitudes of temperatures;

  • annual average air temperature of 11 °C;

  • annual precipitations are generally scarce (average of 450 mm);

  • air humidity, increasing towards the east, due to intense evaporation in the zone.



  • Opportunities for incomers: Delta:

  • the Danube Delta is situated in the middle of the northern hemisphere

  • (crossed by the 45° N parallel of latitude) on the main migration routes;

  • communication with the brackish waters of the Atlantic Ocean

  • eastern regions through a large canal network and the Black Sea;

  • inhabitants are enterprising and begin different new farming activities.



Accidentally introduced species Delta:

Anodonta woodiana

http://www.naturamediterraneo.it/Public/

data4/Stefano78/A%20cygnea%202.jpg_2006121104729_A%20cygnea%202.jpg

[February 2009]


Accidentally introduced species Delta:

Elodea canadensis

agspsrv95.agric.wa.gov.au/dps/version02/01_pl...

[11 February]

Pseudorasbora parva

commons.wikimedia.org/wiki/File:Pseudorasbora...

[11 February]


Accidentally introduced species Delta:

1

2

  • Corbicula fluminea

  • www.inhs.uiuc.edu/cbd/musselmanual/page174_5.html

  • www.zooplus.de/.../teich/teichbewohner/92633

  • [11 February]


Accidentally introduced species Delta:

Eriocheiron sinensis

www.padil.gov.au/viewPestLargeImage.aspx?id=1...

[11 February]


Accidentally introduced species Delta:

  • Carassius auratus gibelio

  • penetrated at the beginning of the 70s;

  • became the most abundant species in the

  • Danube Delta replacing the crucian carp,

  • the common carp, etc.;

  • it presents a gynogenetical reproduction;

  • tolerates very well oxygen and

  • temperature variations, being able

  • to survive out of water for 3 hours.

  • (www.caders-weiher.de/fischkunde/galerie/fuenf... )

  • [11 February]

Leptinotarsa decemlineata

www.funet.fi/.../life/warp/album-Savela-20.html


Accidentally introduced species Delta:

Rhithropanopaeus harrisi tridentatus

nas.er.usgs.gov/.../FactSheet.asp?speciesID=197

[11 February]

  • brackish water species, common in the

  • eastern regions of the Atlantic;

  • it was found in the Razelm Lagoon

  • in 1951 by Bacescu;

  • enriched species diversity in the

  • Danube Delta without harmful action on

  • other species.

  • (Skolka and Gomoiu, 2004)


Accidentally introduced species Delta:

Beroe ovata

Mnemiopsis leidyi

flickr.com/.../undervannsfotografen/1265802993/

[11 February]


Accidentally introduced species Delta:

Scapharca inaequivalvis

http://it.wikipedia.org/wiki/Arcidae

[11 February]

Mya arenaria

www.carnegiemnh.org/mollusks/classes/food.htm

[11 February]


Species that naturally Delta:extend their range

Canis auraeus

animal.discovery.com/.../dads/dads-08.html

[11 February]


Species that naturally Delta:extend their range

Nyctereutes procyonoides

scienceblogs.com/.../2008/03/raccoon_dog.php

[11 February]


Species that naturally Delta:extend their range

Ondatra zibethicus

perpetuallyperegrine.files.wordpress.com/2008; www.pbase.com/image/44263790 [11 February]


Species that naturally Delta:extend their range

Syntarucus pirithous

www.geocities.com/.../Deutsch/pirithous.htm

[11 February]

Lampides boeticus

[email protected]/254731888/

[11 February]


Species that naturally Delta:extend their range

Cameraria ohridella

dendro.mojzisek.cz/magaz0.php

[11 February]

Phylloxera vastatrix

www.otranto.biz/.../storia-barbatella.html

11 February]


Deliberately introduced species Delta:

Eleagnus angustifolia

commons.wikimedia.org/wiki/File:Elaeagnus_ang...

[11 February]

Amorpha fruticosa

www.mountainmeadowseeds.com/Trees-Bushes.html

[11 February]


Deliberately introduced species Delta:

Robinia pseudoacacia

www.naturephoto-cz.eu/robinia-pseudoacacia-pi...

[11 February]

Populus sp.

courses.washington.edu/z490/gmo/toby.html

[11 February]


Deliberately introduced species Delta:

Aristichthys nobilis

www.ittiofauna.org/.../index.htm

[11 February]


Deliberately introduced species Delta:

Ctenopharingodon idella

www.israquarium.co.il/.../IsraelFishABC.html

[11February]

Hypophthalmichthys molitrix

en.wikipedia.org/wiki/Silver_carp

[11 February]


Deliberately introduced species Delta:

Phasianus colchicus

www.naturephoto-cz.eu/bazant-obycajny-pic-448...

[11February]


REFERENCES Delta:

www.naturephoto-cz.eu/bazant-obycajny-pic-448...

flickr.com/.../undervannsfotografen/1265802993/

http://www.naturamediterraneo.it/Public/

commons.wikimedia.org/wiki/File:Pseudorasbora...

www.deltafishing.ro/en/intara.html

www.britannica.com/EBchecked/topic-art/84090/...

http://www.seine-escaut.org/images/map3_xl.jpg

www.agric.wa.gov.au/ikmp/images/elodea.gif

www.caders-weiher.de/fischkunde/galerie/fuenf...

www.funet.fi/.../life/warp/album-Savela-20.html

nas.er.usgs.gov/.../FactSheet.asp?speciesID=197

perpetuallyperegrine.files.wordpress.com/2008

www.pbase.com/image/44263790

scienceblogs.com/.../2008/03/raccoon_dog.php

animal.discovery.com/.../dads/dads-08.html

www.geocities.com/.../Deutsch/pirithous.htm

[email protected]/254731888/

dendro.mojzisek.cz/magaz0.php

www.otranto.biz/.../storia-barbatella.html

www.naturephoto-cz.eu/robinia-pseudoacacia-pi...

www.mountainmeadowseeds.com/Trees-Bushes.html

commons.wikimedia.org/wiki/File:Elaeagnus_ang...

courses.washington.edu/z490/gmo/toby.html

www.israquarium.co.il/.../IsraelFishABC.html

www.ittiofauna.org/.../index.htm

en.wikipedia.org/wiki/Silver_carp

www.carnegiemnh.org/mollusks/classes/food.htm

www.padil.gov.au/viewPestLargeImage.aspx?id=1...


  • REFERENCES Delta:

  • http://it.wikipedia.org/wiki/Arcidae

  • www.inhs.uiuc.edu/cbd/musselmanual/page174_5.html

  • www.zooplus.de/.../teich/teichbewohner/92633

  • Paltineanu, Cr., Mihailescu, I.Fl., Seceleanu, I. 2000 Dobrogea-condiţiile pedoclimatice,

  • consumul şi necesarul apei de irigaţie pentru principalele culturi agricole, Ed. Ex Ponto, Constanţa

  • Photographs:

  • BANARU Daniela

  • MUREŞAN Mihaela

  • ONCIUTeodora Maria


THANK YOU ! Delta:


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