Crustaceana 79 (10): 1223-1240
-
Upload
naomi-clarke -
Category
Documents
-
view
31 -
download
0
description
Transcript of Crustaceana 79 (10): 1223-1240
11
Community Structure of Planktonic Copepods in Community Structure of Planktonic Copepods in I-Lan Bay and the Adjacent Kuroshio Waters off I-Lan Bay and the Adjacent Kuroshio Waters off
Northeastern TaiwanNortheastern Taiwan宜蘭灣及台灣東北部外海黑潮流域之
浮游橈足類的群聚結構
Crustaceana 79 (10): 1223-1240
CHUN-YEIN LEE 1,4) , CHANG-TAI SHIH 2) and
CHIEN-CHUNG HSU 3)
Meng-Yao Lee
2
IntroductionIntroduction
3
4
Tropical Level and Marine Food Chains
5
ObjectivesObjectives►This research are to illustrate the relationship
between copepod distribution and hydrographic factors and to monitor the faunas of marine planktonic copepods.
►Important organisms and their seasonal community dynamics, such as species composition, abundance, distributional pattern, parameters of biodiversity, community structure
, and other issues of biological oceanography.
6
Material Material and and
MethodMethod
7
4/20~21
1/7~8
7/22~23
10/21~22
1. Data collect
8
Choice stations (R/V Hai-Chien)
Samples
Diveded 、 enumeration and Identification
Ring trawl net (335µm,1m,0.5m/s)
CTD(SBE19)
9
CTD(SBE19)
Choice stationsR/V Hai-Chien
Samples
種類計數、鑑別
Ring trawl net (335µm,1m,0.5m/s)
10
CTD(SBE19)
Choice stations R/V Hai-Chien
Samples
Ring trawl net (335µm,1m,0.5m/s)
Diveded 、 enumeration and Identification
11
5%formaldehyde
CTD(SBE19)
Choice stations R/V Hai-Chien
Samples
Ring trawl net (335µm,1m,0.5m/s)
Diveded 、 enumeration and Identification
12
CTD(SBE19)
Choice stations R/V Hai-Chien
Samples
Ring trawl net (335µm,1m,0.5m/s)
Diveded 、 Enumeration and Identification
2. Data identification
Species :: Shih, C. T., MS 、 Chen & Zhang (1965) Chihara and Murano(1997) …
rudimentary(genus feature)
Maturity ofidentification(appendages)
(P5)(genital somites)
species
genera
copepodid
develop
14
3. Data analysis
Diversity indexRichnessEvenness
Species compositions were compared among
station and copepod species diversity
Jaccard coefficient Similarity between twocommunities
UPGMA Cluster
15
Yi : the dominance of species iNi : the number of individuals of species i at all stationsN : the number of individuals of all species at all stationsfi : the frequency of station that species i occurs
R : the seasonal replacement rate of dominant speciesa & b : the numbers of dominant species occurring in two adjoining seasons respectivelyc : the number of dominant species common to both
16
ResultResult
17
Winter
January
Spring
April
Summer
July
Autumn
October
Hydrographic characteristics
T-S diagrams in 2004
Species composition
Poecilostomatoida, 35 species
52 species were common in all seasons
4 orders, 25 families, 53 genera, 137 species
Calanoida, 94 species
Cyclopoida, 7 species
Harpacticoida, 1 species
20
Oncaea venustaCosmocalanus darwini
Clausocalanus minor
Oithona plumifera
100%
Ctenocalanus, Neoscolecithrix,Scaphocalanus, Scolecithricella, and Tharybis.
Genera
33 species single
ABKSCD
5 species6 species 8 species
8 species6 species
21
Abundance and the dominant species
1334 ind./m3
Spring999±372 ind/m3
Shelf waters > > Kuroshio waters
26 dominant species26 dominant species
all seasons
single seasons 64.7% 47.7%49.2-75.7% 43-57.7%
Biodiversity parameters
(H’)
(J’)
(S)
(H’) 3.03-5.16
(J’) 0.57-0.91
(S) 77-101
23
Distributional association
Biological oceanography
A BKS C D
239 ind./m3
255 ind./m3
Shelf region
Summer
KS 、 CAll season
Calanus sinicus
24
DiscussionDiscussion
25
Aetideus truncatus
7 species
Candacia ethiopica Pontellina plumata
Gaetanus minor Haloptilus longcornis
Pareucalanus attenuatusScolecithricella dentata
Candacia longimana
26
this stduy Yang et al. (1999b) Xu et al. (2004)
regoin NE Taiwan N Taiwan ECS
species 137 223 226
common species(%)
37.9 31.8 32.7
dominant species 26 13 17
R(%) 47.7~ 64.7 36.4~75 66.7~ 88.9
Clausocalanus spp.(Frost & Fleminger, 1968; Chihara & Murano, 1997)
Temora turbinata
Calanus sinicusCosmocalanus darwini
Nannocalanus minor
Undinula vulgaris
Acrocalanus gibber
27
999±372 ind./m3(A)
155±129 ind./m3(D) Coast shelf
nutrients(Lalli & Parsons, 2000)
Kang & Hong (1995)
Chern&Wang(1994) and Lee&Hu(1998)(H) 4.84~ 5.17 (S) 46~ 57
29
Temora turbinata
Yang et al. (1999b) 35% Seaward
Calanus sinicus
B 39.5%D 40.4%
Calanus sinicus
Yellow SeaEast China Sea
85% of total zooplanktonin Spring
30
Northern : Spring-Summer Lower water temperatureSouthern : Winter Autumn
Calanus sinicusXu et al. (2004)
Countercurrent Kuroshio slope shelf edge Northern Taiwan 23℃、 KC deeper
Shih & Chiu (1998)
31
ConclusionConclusion
32
In I-Lan Bay and the Adjacent Kuroshio Waters are not significantdifference of copepods community structure compared with past study, and seasonal fluctuations of copepods distributed in this study.
Copepods abundence 、 Speciees number and diversity index showed a decreaseing trend seward. (coast to shelf)
Copepod species distribution patterns with Kuroshio current and two major type :Spring-Winter and Summer-Autumn.
Calanus sinicus is an indicator species Kuroshio Current and East China Sea waters.
33
Thank youThank you