life potamo fauna · 1 km lake banyoles situation and description surface: 112,5 ha perimeter: 6,94...
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LIFE Potamo Fauna (LIFE 12 NAT/ES/001091)
- The fight against aquatic invasive species -
Quim Pou i Rovira
LIFE nature and biodiversity training in Budapest (LIFE14 CAP/HU/000010)
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1 Km
LAKE BANYOLES
Situation and description
Surface: 112,5 Ha
Perimeter: 6,94 Km
Mean depth: 14,8 m
Maximum depth: 46,4 m
Catalonia,new state in Europe
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• Karstic system of Banyoles - Sant Miquel de Campmajor
• Subterranean water surgency, with relatively high renovation (0,8 years).
• Water has a high dissolved salts content, mainly sulphates and carbonates: high conductivity (0.8-1.9 mS/cm).
• The lake is considered oligo-mesotrophic (chla a: 1-15 mg l-1).
• There is a complex stratification of the water column: the most superficial layer (mixolimnion) tends to separate in two during the summer (epilimnion and hipolimnion).
• Due to the bathymetric profile of the lake and the high stability of the water level, vegetal communities are configured in clearly defined concentric belts.
Hidrology and limnology
LAKE BANYOLES
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Natura 2000 Webwork
PROTECTION OF THE NATURAL SITE
RAMSAR list
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11 habitats of
Community interest
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15 species included in Habitats Directive
28 species included in Birds Directive
Many other species threatened and/or protected at national level
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The first LIFE Project (2003-2007)
Main objective : Wetland and riparian forest recovery
Budget: 864.544 Euros
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November 2005
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APRIL 2007
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“Projecte Estany” a LIFE+ Nature project
Duration: 2010-1013
Budget: 1.020.352 €
Coordination: Consorci de l’Estany
www.estanyespainatural.net
The second of three LIFE projects in this site !
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Projecte Estany
Main objective:
To design and implement a large scale intervention to combat, slow down and revert the decline in species and habitats of Community interest in the Natura 2000 Network space “Lake Banyoles”, through the control of invasive exotic species and the population strengthening of seriously threatened native species.
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Main strategies of action:
1. Control of invasive acuatic fauna
2. Population strengthening of 3 species of Community interest: Unio elongatulus, Emys orbicularis, and Barbus meridionalis.
3. Control of invasive flora in banks of the lake and some streams arround.
4. Strategic restoration of highly modified bank habitats.
Projecte Estany
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Dr. Francesc Darder i Llimona (1851-1918)
“Festa del Peix” 1910
Why the “Projecte Estany” ?
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Native species:
Eel Anguilla anguilla
Tench (Native?)
Tinca tinca
Medit. Barbel Barbus meridionalis
Catalan Chub Squalius laietanus
Three. Stickleback Gasterosteus aculeatus
Freshw. Blenny Salaria fluviatilis
CHANGES ON THE FISH COMMUNITY OF THE LAKE
Relative abundance: High Medium Low Ocasional
1900 1920 1940 1960 1980 2000
? ?
? Extinct
Fonts: Moreno-Amich et al. 1992; Garcia-Berthou 1994; Zamora y Pou-Rovira 2003; Pou-Rovira 2004; Zamora y Feo 2007
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Introduced species:
Carp Cyprinus carpio
Gold fish Carassius auratus
Crucian Carp Carassius carassius
Rudd Scardinius erythrophthalmus
Roach Rutilus rutilus
Italian Spined Loach Cobitis bilineata
Black Bullhead Ameiurus melas
Mosquitofish Gambusia holbrooki
Pike Esox lucius
Largemouth Bass Micropterus salmoides
Pumkinseed Lepomis gibbosus
Perch Perca fluviatilis
Pike perch Sander lucioperca
1900 1920 1940 1960 1980 2000
? ?
?
? ?
Fonts: Moreno-Amich et al. 1992; Garcia-Berthou 1994; Zamora y Pou-Rovira 2003; Pou-Rovira 2004; Zamora y Feo 2007
CHANGES ON THE FISH COMMUNITY OF THE LAKE
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OTHER INVASIVE ALIEN SPECIES
IN LAKE BANYOLES
Procambarus clarkii Neovison vison
Trachemys scripta Discoglossus pictus
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Present status of the unionoids
• Presence of 4 native species !!
Unio ravoisieri
Invasive alien species present in the hidrological basin, but not yet in the lake ...
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So,
nowadays, introduction and proliferation of IAS is
the main threat for native species of Lake
Banyoles, and also for some of their habitats …
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Erradication ?
THEORETIC OPTIONS:
• Complet drying of the lake
• Use of biocides (e.g. rotenone)
• Intensive and sustained demographic control of main IAS
Main challenges:
1) To achieve a significant reduction of stocks of IAS, sufficient to some extent for the recovery of native endangered species.
2) To obtain feasible methods for long term keeping of this reduction.
X X
Previous analysis of alternatives
Projecte Estany
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Control of exotic fish
Projecte Estany
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Control of exotic fish
Projecte Estany
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Captures: IND. ELECTROFISHING 112 300 OTHER TECHNIQUES 5 072 TOTAL 117 372
Control of exotic fish: selected results Projecte Estany
43,9%
54,9%
1,3%
0,3%
0,3%0,01%
0,0%
0,2% 0,02%
0,3% 0,04%17,1%
47,9%
20,7%
0,59%
0,41%
6,5%
7,8%4,7%
0,8%
ELECTROFISHING OTHER TECHNIQUES
45,2%20,6%3,5%23,5%2,6%
3,4%
0,0%0,03%0,03%3,8%
0,18%
Micropterus salmoides Lepomis gibbosus Perca fluviatilis Sander lucioperca
Cyprinus carpio Anguilla anguilla Squalius laietanus Barbus merdionalis
Salaria fluviatilis Other fish
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Largemouthbass: Captures – Electrofishing
Control of exotic fish: selected results Projecte Estany
Lenght class: 0-10 cm
Lenght class: 10-20 cm
Lenght class: 20-30 cm
Lo
g C
PU
E +
1
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Control of exotic fish: selected results Projecte Estany
Lo
g C
PU
E +
1
Lenght class: 30-40 cm
Lenght class: 40-50 cm
Lenght class: 50-60 cm
Largemouthbass: Captures – Electrofishing
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Control of exotic fish: selected results Projecte Estany
M
ea
n le
na
gth
(m
m)
M
ax
le
na
gth
(m
m)
Date
Largemouthbass: Captures – Electrofishing
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Control of exotic fish: selected results Projecte Estany
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Control of exotic fish: selected results Projecte Estany
R
ela
tive
ab
un
da
nc
e (
Ad
jus
ted
me
an
)
Month
Largemouthbass: Efficiency – Electrofishing MLG
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Lo
g C
PU
E +
1
Carp: Captures – Electrofishing
Control of exotic fish: selected results Projecte Estany
Date
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Freshwater Blenny: Captures – Electrofishing
Control of exotic fish: selected results Projecte Estany
Consecutive campaigns (constant effort)
Lo
g C
ap
tures
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Control of exotic turtles Projecte Estany
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Captures d'espècies exòtiques
87%
2%
9%
0%
0%
1%0%
1%
0%
Graptemys pseudogeographica
Chrysemys picta
Pseudemys concinna
Pseudemys nelsoni
Trachemys scripta ssp. elegans
Trachemys scripta ssp. hibrida
Trachemys scripta ssp. scripta
Trachemys emolli
Trachemys scripta ssp.
Projecte Estany Control of exotic turtles: selected results
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Projecte Estany Control of exotic turtles: selected results
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- LIFE Potamo Fauna -
Conservation of fluvial fauna fluvial of community
interest in rivers Ter, Fluvià and Muga
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Area of action
LIFE Potamo Fauna
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Target species
Espècie
Directiva Hàbitats
Annex II Annex IV Annex V
Unio elongatulus X
Vertigo moulinsiana X
Vertigo angustior X
Austropotamobius pallipes X X
Barbus meridionalis X X
Emys orbicularis X X
Mauremys leprosa X X
Triturus marmoratus X
Alytes obstetricans X
Pelobates cultripes X
Bufo calamita X
Hyla meridionalis X
U. mancus + U. ravoisiseri (= U. aleroni )
LIFE Potamo Fauna
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ESTRATEGY: Strengthening populations through release of individuals coming from ex situ reproduction
Unio mancus Unio ravoisieri
(Unio elongatulus)
Austropotamobius pallipes Emys orbicularis
Fotografies: PNZVG, Cons. de l’Estany, CRT-ATA
LIFE Potamo Fauna
Target species
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Vertigo moulinsiana Vertigo angustior Barbus meridionalis
Fotografies: PNZVG, Cons. de l’Estany, CRT-ATA
LIFE Potamo Fauna
ESTRATEGY: Strengthening populations through release of individuals coming from other healthy populations
Target species
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Mauremys leprosa Alytes obstetricans Hyla arborea
Triturus marmoratus Bufo calamita Pelobates cultripes
Fotografies: Cons. de l’Estany, Wikicommons
LIFE Potamo Fauna
ESTRATEGY: indirect, through strategic habitat recovery
Target species
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LIFE Potamo Fauna
Fotografies: Cons. de l’Estany
Freshwater mussel rearing facilities - Consorci de l’Estany
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Fotografies: PNZVG
Centre reproductor del cranc de riu autòcton del PNZVG (DAAM)
LIFE Potamo Fauna
Crayfish rearing center – PN Zona Volcànica de la Garrotxa
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Fotografies: CRT-ATA
LIFE Potamo Fauna
Center for the captive breeding of native turtles – Garriguella (Alt Empordà)
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Fight against alien species (IAS)
Fotografies: Cons. de l’Estany, Wikicommons, CHE
LIFE Potamo Fauna
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LIFE Potamo Fauna
Fotografies: Cons. del Ter
Public awareness and results dissemination
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Köszönöm!