LIFE+ BIOAQUAE: eradication of introduced fish and ... · Parco Nazionale Gran Paradiso LIFE+...
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Parco Nazionale Gran Paradiso
LIFE+ BIOAQUAE: eradication of introduced fish and recovery of high mountain lakes (Actions C.1 and C.2)
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Fish introductions in mountain lakes
REF: Ventura et al. 2017. In: Adv. Global Change Res., Vol. 62.
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LIFE+ Project BioaquaePlatform Meeting on Invasive Alien Species, November 29th, 2017
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LIFE+ Project BioaquaePlatform Meeting on Invasive Alien Species, November 29th, 2017
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LIFE+ Project Bioaquae
Action: C.1 C.1 C.2 C.1
Platform Meeting on Invasive Alien Species, November 29th, 2017
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LIFE+ Project BioaquaePlatform Meeting on Invasive Alien Species, November 29th, 2017
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Foto A. Provenzale
LIFE+ Project BioaquaePlatform Meeting on Invasive Alien Species, November 29th, 2017
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Foto A. Provenzale
LIFE+ Project Bioaquae
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Conservation value
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Conservation valuePlatform Meeting on Invasive Alien Species, November 29th, 2017
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Unrooted haplotype networks showing disconnections at 97% parsimony threshold
REF.: Bellati A. et al. 2014. ZoolJ Linnean Soc 171: 697-715
Conservation valuePlatform Meeting on Invasive Alien Species, November 29th, 2017
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Non invasive methods
REF.: Knapp & Matthews 1998Restoration Ecology 6:207
Platform Meeting on Invasive Alien Species, November 29th, 2017
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MethodsPlatform Meeting on Invasive Alien Species, November 29th, 2017
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Methods - GillnettingPlatform Meeting on Invasive Alien Species, November 29th, 2017
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Methods - GillnettingPlatform Meeting on Invasive Alien Species, November 29th, 2017
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Eradication efforts
Lake DJO DRE LEY NER
Number of nets 14 30 (+7) 50 12
Total nets surface (m2) 921 2620 8027 1148
Number of surveys of the gillnets 39 80 52 30
Number of electrofishing sessions 4 39 7 0
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Eradication: brook trout capturesPlatform Meeting on Invasive Alien Species, November 29th, 2017
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Fish extinction
DJO DRE
LEY NER
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Eradication summary
Lake DJO DRE LEY NER
Date of settlement of the first nets 4 Jul 2013
24 Jun 2013
5 Ago 2013
11 Jul 2013
Date of removal of the last fish 14 Jun 2014
11 Aug 2015
5 Jul 2016
7 Jun 2015
Date of removal of the nets 17 June 2016
10 Jun 2017
8 Jul 2017
3 Jul 2016
Duration of the eradication process (days) 95-346 781 785-1095 438-696
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Applicability Platform Meeting on Invasive Alien Species, November 29th, 2017
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Applicability: equipment constrainsPlatform Meeting on Invasive Alien Species, November 29th, 2017
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Applicability: time/personnel constrains International Meeting on the Conservation of High Mountain Lakes
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Applicability: environmental constrainsInternational Meeting on the Conservation of High Mountain Lakes
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REF: Tiberti et al. 2014. Hydrobiologia 724:1-19.
Ecological consequences
Direct impact
Platform Meeting on Invasive Alien Species, November 29th, 2017
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REF: Tiberti and von Hardenberg, 2012. Amphibia-reptilia 33: 303-307
Ecological consequences
Direct impact
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Ecological consequences
Direct impact
Platform Meeting on Invasive Alien Species, November 29th, 2017
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REF: Tiberti et al. 2014. Hydrobiologia 724:1-19.
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REF: Tiberti et al. 2014. Hydrobiologia 724:1-19.
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REF: Tiberti et al. 2014. Hydrobiologia 724:1-19.
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REF: Enpanchin et al. 2010. Ecology 91: 2406-2415
Ecological consequences
Lake-land reciprocal subsidies
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Ecological resilience
Amphibians
Zooplankton community
Aquatic insects
Trophic status
Ecological connection between terrestrial and
aquatic habitats
Expected resultsPlatform Meeting on Invasive Alien Species, November 29th, 2017
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Monitoring: Action D.1Platform Meeting on Invasive Alien Species, November 29th, 2017
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Resilience
No
. of
Da
ph
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x m
-3
0
500
1000
1500
2000
2500
lug2
00
6
ago
20
06
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9
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0
lug2
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0
ago
20
10
ago
20
10
ago
20
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sep
20
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sep
20
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oct
20
10
jul2
01
1
ago
20
11
lug2
01
2
ago
20
12
ago
20
13
ago
20
13
sep
20
13
jul2
01
4
ago
20
14
sep
20
14
jun
20
15
lug2
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5
ago
20
15
sep
20
15
lug2
01
6
lug2
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ago
20
16
oct
20
16
Lake Leynir
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Resilience
Sampling
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Resilience
0
1
2013 2014 2015 2016 2017
0
50
100
150
200
2013 2014 2015 2016 2017
0
50
100
150
2013 2014 2015 2016 2017
0
0.2
0.4
0.6
0.8
1
2013 2014 2015 2016 2017
NERO
DJOUAN DRES
LEYNIR
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... and then eradications come
Fish eradication is an advanced conservation action
Formal protection, i.e. proibition:• Fish stocking• Fishing activities• Use of live bait (such as minnows)
Effective protection (effective surveillance service)
Role of protected areas
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Possible (and effective) solutions exist!
REF: Knapp et al., 2016. PNAS: 201600983
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Fishing and stocking prohibition
Without stocking the 10-40% of intorduced fishpopulations are doomed to extinction in a few generations
REF: Ventura et al. 2017. In: Adv. Global Change Res., Vol. 62.
Platform Meeting on Invasive Alien Species, November 29th, 2017
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Is restoring individual lakes enough?• Population viability• Species and ecosystem resilience
A long way.... a question of scalePlatform Meeting on Invasive Alien Species, November 29th, 2017
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Alien native species (!?)
A long way... how to define IAS?Platform Meeting on Invasive Alien Species, November 29th, 2017
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A long way... education
GOOD NEWS! GOOD NEWS!
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Contacts: www.bioaquae.eu
LIFE+ BIOAQUAE @bioaquae
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GRAZIE! R [email protected]
Platform Meeting on Invasive Alien Species, November 29th, 2017
LIFE+ BIOAQUAE
@bioaquae
www.bioaquae.eu