Mollusk fauna associated with Cystoseira barbata (Stockhouse) C. Agardh, 1820 in the Sea of Marmara (Turkey)

Bitlis, Banu

doi:10.1515/ohs-2019-0016

Figures & Tables

The mean number of mollusk species (S), the mean number of individuals per m2 (N) and the mean biomass of mollusks g m–2 (B) at the sampling sites

Mean values of the diversity index (H') and of the evenness index (J') at the sampling sites

Dendrogram indicating similarities and dissimilarities of the sampling sites

Biplot of CCA performed on the total abundance of all species in samples and environmental variables (arrows): T – temperature; O – oxygen; pHi – pH; Chl a – chlorophyll a;TN – total nitrogen; P– phosphorus; Si – silicate; MTH – maximum thallus height; EB – epiphyte wet weight; AB – algal wet weight; Lc – Lepidochitona cinerea, Sa – Steromphala adansonii, Js – Jujubinus striatus, Tp – Tricolia pullus pullus, Hs – Homalopoma sanguineum, Br – Bittium reticulatum, Cs – Cerithidium submammillatum, Ac – Alvania cimex, Ad – Alvania discors, Am – Alvania mamillata, Pp – Pusillina philippi, Pr – Pusillina radiata, Rg – Rissoa guerinii, Rsi – Rissoa similis, Rsp – Rissoa splendida, Rve – Rissoa ventricosa, Rvi – Rissoa violacea, Oe – Ocenebra edwardsii, Ps – Pisania striata, Tn – Tritia neritea, Si – Spiralinella incerta, Be – Brachystomia eulimoides, Bs – Brachystomia scalaris, Mb – Modiolus barbatus, Ml – Mytilaster lineatus, Mm – Mytilaster minimus, Mg – Mytilus galloprovincialis, Mc – Musculus costulatus, Fg – Flexopecten glaber, Hr – Hiatella rugosa

Alvania mamillata; A – frontal view of the specimen and its protoconch (B) (h = 4.8 mm)

Species contributing most to the species assemblages of C_ barbata according to the SIMPER analysis_ Bold values indicate the highest scores of species contribution in each assemblages_

	Similarity		Dissimilarity
Associations	A	B	A–B	A–K24	B–K24
% similarity and dissimilarity	58%	64%	53%	76%	54%
Steromphala adansonii	13	14		9	16
Tricolia pullus pullus	10
Alvania discors	16		11	11
Pusillina philippi	8
Rissoa guerinii	12		10	9
Rissoa splendida	18	23		12	23
Mytilaster lineatus		20
Mytilaster minimus		17	9	8
Mytilus galloprovincialis		13			14
Musculus costulatus	11		8	9

Results of canonical correspondence analysis_ Statistically significant values (p < 0_05) are marked in bold_

Environmental variables	Axis 1	Axis 2
Temperature	0.483	–0.401
Oxygen	0.413	0.237
pH	–0.021	–0.053
Chlorophyll a	–0.301	0.115
Total nitrogen	0.751	0.555
Phosphorus	–0.501	0.208
Silicate	0.303	–0.084
Maximum thallus height	0.651	–0.203
Epiphyte wet weight	–0.047	0.039
Algal wet weight	–0.222	0.483
Eigenvalues	0.703	0.585
Species-environment correlations	0.999	0.994
Cumulative percentage variance of species data	29.6	54.2
Cumulative percentage variance of species-environment relation	30.8	56.3

Coordinates, sampling dates, depth range and location of the sampling sites

Sites	Coordinates		Date	Depth (m)	Localities
Sites	Latitude	Longitude	Date	Depth (m)	Localities
1	40°01.650'N	26°19.950'E	25.09.2012	0.2	Çanakkale, Güzelyalı
2	40°17.483'N	26°36.933'E	26.09.2012	0.2	Çanakkale, Suluca
3	40°08.000'N	26°21.417'E	06.10.2012	0.2	Çanakkale, Havuzlar
5	40°23.900'N	26°52.633'E	26.09.2012	0.2	Çanakkale Şevketiye
6	40°28.083'N	27°16.250'E	26.09.2012	0.2	Karaburun
7	40°35.617'N	27°32.800'E	28.09.2012	0.5	Island of Marmara
8	40°28.050'N	27°42.583'E	27.09.2012	0.2	Erdek
9	40°36.317'N	27°40.067'E	28.09.2012	0.5	Island of Marmara
13	40°32.417'N	28°47.300'E	30.09.2012	0.5	Bozburun
14	40°39.567'N	29°09.200'E	01.10.2012	0.2	Koru
19	41°01.117'N	29°00.550'E	03.10.2012	0.5	Üsküdar
24	40°57.917'N	27°57.400'E	04.10.2012	0.5	Ereğli
25	40°51.983'N	27°27.633'E	05.10.2012	0.5	Kumbağ
26	40°36.500'N	27°05.817'E	05.10.2012	0.5	Şarköy

Pearson's correlation coefficients between the environmental variables and community parameters_ Statistically significant values (p < 0_05) are marked in bold

	Number of species	Number of individuals \|	Wet weight	Evenness index	Diversity index
Salinity	0.45	–0.06	–0.14	0.18	0.37
Temperature	0.13	0.37	0.44	–0.53	–0.32
Oxygen	0.00	0.06	0.05	–0.33	–0.19
pHins	–0.18	0.40	0.35	–0.59	–0.55
Chla	0.22	–0.20	–0.36	0.69	0.57
Total nitrogen	0.05	–0.18	0.23	–0.27	–0.03
Phosphorus	–0.01	0.48	0.06	–0.31	–0.26
Silicate	–0.07	–0.27	–0.20	0.44	0.16
Max. thallus height	0.15	0.20	0.44	0.32	0.20
Epiphyte wet weight	0.25	0.20	0.21	–0.07	–0.08
Algae wet weight	0.01	0.05	0.16	0.05	0.08

List of the species and total number of individuals at the study sites with their dominance (D%) and frequency values

	K1	K2	K3	K5	K6	K7	K8	K9	K13	K14	K19	K24	K25	K26	D%	F%
POLYPLACOPHORA
Lepidochitona cinerea(Linnaéus, 1767)						•1									0.02	4.76
GASTROPODA
Steromphala adansonii(Payraudeau, 1826)	38	0	10	23	68	124	8	12	24	4	17	0	129	3	2.49	66.67
Jujubinus striatus(Linnaéus, 1758)	–	–	1												0.01	2.38
Tricolia pullus pullus(Linnaéus, 1758)	17	2	4	–	–	15	–	29	12	2	1	2	149	89	1.74	45.24
Homalopoma sanguineum(Linnaéus, 1758)	–	–	–	–	–	–	3	–	–	–	–	–	–	–	0.02	2.38
Bittium reticulatum(da Costa, 1778)	10	18	–	–	–	5	1224	1	–	–	–	–	7	7	6.89	35.71
Cerithidium submammillatum(De Rayneval & Ponzi, 1854)	–	–	–	–	–	–	245	–	–	–	–	–	–	–	1.33	2.38
Alvania cimex (Linnaéus, 1758)	3														0.02	2.38
Alvania discors (T. Allan, 1818)	41	–	43												0.45	11.90
*Alvania mamillata Risso, 1826	–	–	1												0.01	2.38
Pusillina philippi (Aradas & Maggiore, 1844)	27	4	2	–	–	4	3	–	–	–	–	–	–	–	0.22	19.05
Pusillina radiata (Philippi, 1836)	–	–	–	–	–	–	41	–	–	–	–	–	–	–	0.22	2.38
Rissoa guerinii Récluz, 1843	54	–	7	–	–	–	–	–	–	–	–	–	–	–	0.33	9.52
Rissoa similis Scacchi, 1836	5														0.03	2.38
Rissoa splendida Eichwald, 1830	119	108	75	43	87	354	116	36	2648	22	14	–	835	566	27.20	85.71
Rissoa ventricosa Desmarest, 1814	2														0.01	2.38
Rissoa violacea Desmarest, 1814															0.01	2.38
Ocenebra edwardsii (Payraudeau, 1826)		–	2	–	3		–	11	–	–	–	–	1	–	0.10	16.67
Pisania striata (Gmelin, 1791)	–	–	–	1	9	–	–	–	–	–	–	–	–	–	0.10	7.14
Tritia neritea (Linnaéus, 1758)	–	–	–	–	–	–	–	1	–	–	–	–	–	–	0.01	2.38
Spiralinella incerta (Milaschewich, 1916)		–	–	–	–		1	–	–	–	–	–	–	–	0.01	2.38
Brachystomia eulimoides (Hanley, 1844)													6	–	0.03	4.76
Brachystomia scalaris (MacGillivray, 1843)	–		–	–	–		–	–	1	–		–		–	0.01	2.38
BIVALVIA
														1	0.02	4.76
Mytilaster lineatus (Gmelin, 1791)	11	22	1	10	32	8	98	1815	108	38	9	42	144	1113	18.69	71.43
Mytilaster minimus (Poli, 1795)	182	95	–	12	5	80	253	–	146	30	47	99	242	5784	37.77	69.05
Mytilus galloprovincialis Lamarck, 1819	19	15	–	1	1	59	19	18	149	8	1	–	22	7	1.73	47.62
Musculus costulatus (Risso, 1826)	90	1	5	–	–	4	–	–	2	–	–	–	–	–	0.55	19.05
Flexopecten glaber (Linnaéus, 1758)	1														0.01	2.38
Hiatella rugosa (Linnaeus, 1767)	–	–	–	–	–	–	3	–	–	–	–	–	–	–	0.02	4.76
*– new record for the fauna of Mollusca in the study area

Mollusk fauna associated with Cystoseira barbata (Stockhouse) C. Agardh, 1820 in the Sea of Marmara (Turkey)

Figures & Tables

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Species contributing most to the species assemblages of C_ barbata according to the SIMPER analysis_ Bold values indicate the highest scores of species contribution in each assemblages_

Results of canonical correspondence analysis_ Statistically significant values (p < 0_05) are marked in bold_

Coordinates, sampling dates, depth range and location of the sampling sites

Pearson's correlation coefficients between the environmental variables and community parameters_ Statistically significant values (p < 0_05) are marked in bold

List of the species and total number of individuals at the study sites with their dominance (D%) and frequency values

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