Caulerpa Racemosa Studenti 2011
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Transcript of Caulerpa Racemosa Studenti 2011
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Caulerpa racemosa
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Rod Caulerpa
• Najveći jednostanični organizmi
• Specifična građa
• Oko 100 svojti
• Tropska i umjereno topla mora
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VrstaCaulepa racemosa
Jedna od morfološkinajplastičnijih vrsta alga
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Caulerpa racemosa• Prvi nalaz u
Sredozemnom moru:Tunis, Sousse, 13. VI. 1926; leg. G. HamelPrijelazni taxon između C. racemosa var. occidentalis i var. laetevirens
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Monaco 1984.
Caulerpa taxifolia
Libya, Tripoli 1990
Caulerpa racemosa
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var. turbinata – uviferatzv. Hamelov oblik
Morfološko-genetička analiza: tri varijeteta
Tunis 1926.
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var. turbinata – uviferavar. lamourouxii f.
requienii
Morfološko-genetička analiza: tri varijeteta
Levantinski zaljev, oko 1950.
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Morfološko-genetička analiza: tri varijeteta
var. turbinata – uviferavar. lamourouxii f.
requieniivar. cylindraceatzv. invazivni varijetet
Većina nalaza nakon 1990.
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Caulerpa racemosa var. cylindracea
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• Jadran: Pakleni otoci, jesen 2000. god.
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Fotofilne alge
Pjeskovito dno
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Gustoća naselja:2600 m kauloida/m2
27000 filoida/m2
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Uklanjanje.• naselja su zatrpana
vapnom• i prekrivena crnom
plastičnom folijom• ručno su sakupljani
slobodni djelići alge
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RAZMNOŽAVANJEnespolno
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RAZMNOŽAVANJEspolno
Grčka, Egejsko more:
- oba tipa gameta
-mali postotak formiranja zigota
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početak ispuštanja gameta12 - 18 min. prije izlaska sunca
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Caulerpa racemosa - gamete
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Caulerpa racemosa var. cylindraceaširenje u hrvatskom dijelu Jadranskog mora
1 4 7 12
34 4155
7085 91
99
0
20
40
60
80
100
12020
00
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
year
nr. o
f sta
tions
.
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Rasprostranjenost alge Caulerpa racemosa var. cylindracea na kraju 2010
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Rasprostranjenost alge Caulerpa racemosa var. cylindracea na kraju 2010
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Značajke nalazišta algeCaulerpa racemosa var. cylindracea
zaštićena i izložena područja
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velika zahvaćena površina do dubine od >50m
Značajke nalazišta algeCaulerpa racemosa var. cylindracea
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Nalazište Cavtat: potpuno duboko nalazište
Značajke nalazišta algeCaulerpa racemosa var. cylindracea
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Nacionalni parkovi: Kornati i Mljet.
nr. colonies
N.P.Kornati
N.P.Mljet
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Supstrat/dubina.
2 m
25 m 40 m
Biološke i ekološke značajke alge C. racemosa var. cylindracea
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Rovinj, 2001. - 2004. godine
11,55
20,62 20,04
15,88
11,5810,60
15,35
18,90
11,80
16,85
24,20
15,11
12,86
8,61
15,3117,11
19,6922,33
10,45
25,30
9,30 9,16
24,88
68
10121416182022242628
2.6.
01
4.6.
01
6.6.
01
8.6.
01
10.6
.01
12.6
.01
2.6.
02
4.6.
02
6.6.
02
8.6.
02
10.6
.02
12.6
.02
2.6.
03
4.6.
03
6.6.
03
8.6.
03
10.6
.03
12.6
.03
2.6.
04
4.6.
04
6.6.
04
8.6.
04
T°C
0 m
5 m
10 m
Limski kanal, 2001.- 2004. godine
11,32
20,59
25,58
19,74
16,10 15,64
24,7025,70
9,65
23,64 22,95
17,00
9,00
15,74
23,85
25,84
7,83
26,25
11,08
68
10121416182022242628
2.26
.01
4.26
.01
6.26
.01
8.26
.01
10.2
6.01
12.2
6.01
2.26
.02
4.26
.02
6.26
.02
8.26
.02
10.2
6.02
12.2
6.02
2.26
.03
4.26
.03
6.26
.03
8.26
.03
10.2
6.03
12.2
6.03
2.26
.04
4.26
.04
6.26
.04
T°C0 m
5 m
10 m
Prema temperaturi, C. racemosa var. cylindracea je eurivalentnija svojta od alge C. taxifolia!
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Spužva na početku invazije!
• Prerasta autohtone alge i nepokretne životinjske organizme kao što su spužve.
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Spužva na kraju invazije!
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Na spužvi promjera 10 cmraslo je 31 m kauloida i 860 filoida
Sarcotragus spinosulus
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Epifiti na rizomima
1
10
0
5
10
15
20
25
30
35
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
rhizomes
B
N
7
30
0
5
10
15
20
25
30
35
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
rhizomes
A
NN of taxa Mean v alue of N
Posidonia + C. racemosaPosidonia
Nsr=17
Nsr=2,7
Ukupno 70 svojti! Ukupno 20 svojti!
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pje
sk
ov
ito
dn
o
mrt
vi r
izo
mi P
. oc
ean
ica
rije
tko
na
se
lje P
. oc
ean
ica
postaje
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Posljedice
• sedimentacija – zatrpavanje
• zasjenjenje• prerastanje –
gušenje• anoksični uvjeti
• drastično povlačenje autohtonih organizama
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Problem racemoza
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Predatori
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planktonska ličinka
predatori
hrana uvjetiokoliša
Caulerpa
bentoski puž
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Kako se alga širi na velike udaljenosti?
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Sidrenje
Većina nalazišta nisu na područjima koja su česta i pogodna sidrišta.
C. taxifolia – prijenos sidrima
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Ribarske mreže
Nalazište Mirce
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Spolno razmnožavanje
Nema čvrstih dokaza da je spolno razmnožavanje u Sredozmnom moru uspješno!
Grčka, Egejsko more:
oba tipa gametamali postotak formiranja zigote
Jadransko more: razvoj samo ženskih gameta
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Fragmentacija
C. taxifolia: širenje na malu udaljenost: 100 – 1000 m.
U naselju brojni fragmenti filoida.
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Fragmentacija: C. racemosa var. cylindraceaU naselju fragmenti rijetki.
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Fragmentacija
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Balastne vode
fragmentipropagule zigote
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Zakyntos , 1993.
Albania
Struje
Nalazišta odgovarajuglobalnom kretanju vodenih masa
Crna Gora
Hrvatska
Grčka
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1. MonitoringŠTO SE MOŽE UČINITI?
• Putem dojava od raznih korisnika mora
• Organizirani: pregled područja visoke kulturnei biološke vrijednosti (npr. nalazište karnivornespužve u parku prirode Talašćica).
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2. Edukacija:
Ciljevi: • dojava novih nalazišta od strane korisnika mora• sprječavanje širenja sidrima i mrežama
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3. Reguliranje sidrenja i zabrana ribolova
Cilj: • sprječavanje širenja sidrima i mrežama
Od zanemarivog učinka zbog primarnog širenja strujama!
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4. Uklanjanje
• Potpuno uklanjanje manjih nalazišta jedino napodručjima visoke biološke i kulturne vrijednosti
Veliko jezeroN.P.Mljet
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GonoturskaKanal Soline
V. jezero
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Veliko jezero u N.P.Mljet
- jedinstven ekosustav:Specifična flora i fauna:
- jedinstvena populacija meduze Aurelia aurita
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- Iznimna populacija školjkaša Pinna nobilis
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- Najveća formacija kamenog koralja Cladocora caespitosa u Sredozemnom moru
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July 2004
Depth: 0.5 – 4 m
Aff.coastline: 150 m
July 2004
Depth: 1 – 30 m
Aff.coastline: 600 m
September 2004
Depth: 8 – 14 m
Aff.coastline: 150 m
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2 mogućnosti:
Pustiti algu da se širi Započeti uklanjanje
Naselja u kanalu Soline i Velikom jezeru mogu biti uklonjena
Gonoturska prevelika
- nastavit će se širiti
- djelovat će kao izvor fragmenata za širenje kanalom i jezerom
Zaključak: uz relativno mala sredstva, alga se može kontrolirati u kanalu i jezeru!
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Metodologija uklanjanja
1. Detaljno kartiranje
Na transektima širine 2,5m
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2. Uklanjanje:
- prekrivanje crnim folijama
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- Sakupljanje podvodnim sisaljkama
- Ručno sakupljanje
Uklanjanje se obavlja na početku i na kraju vegetacijske sezone alge.
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Kanal Soline : tijekom 2 godine broj naelja i prekrivena površina se smanjuju
covered area m2132
225.5
14 9 7
0
20
40
60
80
100
120
140
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
nr. colonies
52
17
119
7
02468
101214161820
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
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Veliko jezero : tijekom 2 godine, broj naselja i prekrivena površina se ne mijenja
nr. colonies
3
32
2
18
24
2
0
5
10
15
20
25
30
35
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
covered area m2
10
34
1
10.515
3
0
5
10
15
20
25
30
35
40
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
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covered area m2132
225.5
14 9 7
0
20
40
60
80
100
120
140
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
nr. colonies
3
32
2
18
24
2
0
5
10
15
20
25
30
35
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
nr. colonies
52
1711 9 7
0
5
10
15
20
25
30
35
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
covered area m2
1034
110.5 15
3
0
20
40
60
80
100
120
140
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
Veliko jezero Kanal Soline
Lipanj 2006:
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nr. colonies
52
17
11 9 7
23
0
5
10
15
20
25
30
35
Jul-04
Sep-0
4
Nov-0
4
Jan-0
5
Mar-05
May-0
5
Jul-05
Sep-0
5
Nov-0
5
Jan-0
6
Mar-06
May-0
6
Jul-06
Sep-0
6
Nov-0
6
Jan-0
7
covered area m2132
2
25.514 9 7
91.5
0
20
40
60
80
100
120
140
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
Sep
-06
Nov
-06
Jan-
07
Kanal SolineVeliko jezeronr. colonies
3
32
2
18
24
2
18
0
5
10
15
20
25
30
35
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
Sep
-06
Nov
-06
Jan-
07
covered area m2
10
34
110.5 15
315
0
20
40
60
80
100
120
140
Jul-0
4
Sep
-04
Nov
-04
Jan-
05
Mar
-05
May
-05
Jul-0
5
Sep
-05
Nov
-05
Jan-
06
Mar
-06
May
-06
Jul-0
6
Sep
-06
Nov
-06
Jan-
07
Studeni 2006:
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Kanal Soline, Studeni 2006
23 naselja prekrivaju 91 m2
Samo 3 od 23 naselja su “nova”
20 naselja je “starih naselja” – razvijeni na mjestima sa kojih su podignute folije u lipnju 2006.
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Kanal Soline, studeni 2006
20 je rezultat obnavljanja alge koja je preživjela ispod folija 2 godine!
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Koji je dio alge preživio?
- nakon podizanja folija nije bilo vidljivih fragmenata
- Caulerpa ne proizvodi nikakav oblik spora
- najvjerojatnije su preživjeli rizoidi
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5. Istraživanje
Cilj: • pronalazak globalne metode kontrole
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Rješenje: Biološka kontrola
Elysia tomentosa
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Budućnost
4 moguća scenarija:
1. - C. racemosa će nastaviti širenje
2. – nestati će poput mnogih "burn and burst species"
3. – slučajni unos predatora
4.. – namjeran unos predatora
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Zaključak
Širenje alge C. taxifolia u Jadranskom moru još je moguće kontrolirati.
Širenje alge C. racemosa var. cylindracea nije moguće kontrolirati. Lokalno uništavanje ima smisla jedino na područjima iznimne biološke i kulturne vrijednosti (Veliko jezero, NP Mljet).
Globalna kontrola u Sredozemnom moru: uvođenjem askoglosnog (stenofagnog) puža s potpunim razvojem unutar kokona – najvjerojatnije iz umjereno toplih mora Australije.
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To be continued.