1 Quantitative variability of th e copepod assemblages in the n orthern Adriatic Sea from 1993 to 1997 在 1993~1997 在在在在在在在在在在在在在在在在在在 Frano Kršinićª , * , Dubravka Bojanić b , Robert Precali c , Robert Kraus c Estuarine, Coastal and Shelf Science(2007),74:528-538 Reporter: Meng-Yau Li
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Frano Kr šinićª , * , Dubravka Bojanić b , Robert Precali c , Robert Kraus c
Quantitative variability of the copepod assemblages in the northern Adriatic Sea from 1993 to 1997 在 1993~1997 年間北亞德里亞海橈足類群聚數量的變動. Frano Kr šinićª , * , Dubravka Bojanić b , Robert Precali c , Robert Kraus c Estuarine, Coastal and Shelf Science(2007),74:528-538 Reporter: Meng-Yau Li. - PowerPoint PPT Presentation
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Quantitative variability of the copepod assemblages in the northern Adriatic Sea fr
om 1993 to 1997在 1993~1997 年間北亞德里亞海橈足類群聚數量的變動
Frano Kršinićª,* , Dubravka Bojanić b ,Robert Precali c , Robert Kraus c
Estuarine, Coastal and Shelf Science(2007),74:528-538
Reporter: Meng-Yau Li
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Introduction The western part of this
area is higher productivity than eastern.
Comparison of these result ,total copepod population and phytoplankton blooms in past and present.
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Micro-phytoplankton (cells >20μm)
Calanoida 哲水蚤 Oithonids長腹劍水蚤
Oncaeid大眼劍水蚤
Nauplii 橈足類幼生
Ciliate 纖毛蟲
Nano-phytoplankton (cells 2-20μm)
Tintinnid水母類
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Objective Two characteristic stations in the northern Adriat
ic Sea between 1993 and 1997. It determine the quantitative aspect of the popul
ation structure , seasonal abundance and vertical variability of all copepod assemblages .
Significantly influence changes in the ecosystem of this sensitive region.
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Materials and methods
Vessel : Vila Velebita ,43 Cruises Station: SJ107Eastern and SJ108Western Period : January 1993 to October 1997 Depth : 0.5m 、 10m 、 20m and near botto
m
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Fig.1. Map of the northern Adriatic Sea with location of sampling stations.
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Choice station region
CTD
bongo net
sample
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Choice station region
CTD
bongo net
sample Conductivity Temperature Depth Recorder
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Choice station region
CTD
bongo net
sample
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Choice station region
CTD
bongo net
sampling
2.5 formaldehyde﹪ 2 lugol’s solution﹪
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Multivariate analysis (perform)
multi-dimensional Scaling (MDS)
Bray-Curtis similarity (classification)
Similarity percentage Analysis (SIMPER)
Log(n+1)
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Result
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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1. Hydrography
1. tMin(7.40 ) ,tMax(29.83 )℃ ℃ ; sMin(21),sMax(38.77)2. tMax(29.83 ) and sMin(21) in SJ108℃
3.But , sMax(38.77) in SJ107 Southern current
1.Pronunced saltier and warmer water intrusion area.2.Lack of circulation.
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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2.Phytoplankton----compare SJ107E and SJ108W abundance
a. 40-70% b. 10-30%
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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3.Ciliated protozoans
2. Max SJ108W1. Max SJ107E Min SJ107E
3. Max SJ108Tintinnopsis minuta =97%
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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4.Copepod assemblages-Nauplii
2. MaxD,20m1.MaxD,10m 3.SJ107E 10m and SJ108W MinD at the same time
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Nauplii total number of copepods
Year StationPercentage
(%)
1995 SJ107 67
1996 SJ107 55-67
1997 SJ107 84
1993 SJ108 74
1994~1995
SJ108 63
1997 SJ108 80
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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4.Copepod assemblages-Calanoida
3.SJ108W33-50% >SJ107E2.June to August 1.Surface 10m , Population Variation
SJ107E
SJ108W
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Predominance species August- Paracalanus parvus ( 小擬哲水蚤 )
November- Acartia clausi
( 刺尾紡錘水蚤 )
Average18~38%
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Significant species Ctenocalanus vanus
Temora longicornis( 寬水蚤 )
Centropages typicus( 刺水蚤 )
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Result
2.Phytoplankton1.Hydrography3.Ciliated pr
otozoans
Abundance and
variable
4.Copepod assemblages
Oithonid and
OncaeidcalanoidaNuplii
Predominance and Significant species
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4.Copepod assemblages-Oithnid
1.SJ108W>SJ107E 3.1993 and 1994,50-64%2.MaxD,10m-20m
4.Oithona nana and oithona similis,20-47%
SJ107E
SJ108W
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4.Copepod assemblages-Oncaeids
1.Max value Autumn/Winter, except summer of 1997
24-40%
18-53%
SJ107E
SJ108W
2. 20m,1994Dec. SJ108W-Oncaea waldemari 1997Sep. SJ108W-Monothula subtilis bottom,Oncaea media and Oncaea zernovi
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Statistical analysis
SJ107 E
SJ107 E
1.In 1994 and 1995,Non-loricates(無甲殼類 ) from group C was high value.
2.Oncaeid(大眼劍水蚤 ) from group A2 at 1993.1994.1995
3.Nuplii(橈足類幼生 ) and Tintinnid(水母類 ) belong group B
4.Group D was Tintinnids in 1997.
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SJ108 W
1. Oncaeid (大眼劍水蚤 ) from group A2 at 1994 and 1995.
2. In 1994 and 1995,Nuaplii (橈足類幼生 )from group C was high value.