Biodiversity Science ›› 2013, Vol. 21 ›› Issue (5): 547-553.doi: 10.3724/SP.J.1003.2013.07050

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Biodiversity of the benthic shellfish in the intertidal zone of the Liusha Bay, Leizhou Peninsula

Sheng Ke1, Yuchun Shen2, *(), Enyi Xie2, Zailiang Li2   

  1. 1 Analytical and Testing Center of Guangdong Ocean University, Zhanjiang, Guangdong 524088
    2 Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animals, Guangdong Ocean University, Zhanjiang, Guangdong 524088
  • Received:2013-03-18 Accepted:2013-03-28 Online:2013-10-08
  • Shen Yuchun E-mail:shenyuchun@163.com

An analysis was conducted of species composition, spatial-temporal distribution and biodiversity of benthic shellfish in the intertidal zone of the Liusha Bay, Leizhou Peninsula, where shellfish are intensively framed. Areas sampled in 2008 and 2009 included seagrass beds (SGB), cultured shellfish areas (CSA) and non-cultured areas (NCA). We found (1) 97 shellfish species, of which 58 occurred in the NCA and 49 in the SGB. Cerithidea cingulata and Batillaria zonalis were dominant species in all three areas. (2) In the SGB and NCA, biomass and abundance of shellfish reached highest values in September and lowest in May. In the SGB and CSA, highest biomass and abundance of shellfish occurred in the high-tidal zone, followed by the mid-tidal zone and low-tidal zone. (3) Highest Margalef richness index and Shannon-Wiener index values were estimated for the NCA while the highest Pielou evenness index values was obtained for the CSA. Based on an analysis of K-dominance curves, the CSA was most severely disturbed. In summary, an unstable community structure and reduced biodiversity of shellfish was evident in the intertidal zone of the SGB and CSA. Improvements to both community structure and biodiversity of benthic shellfish in these areas are likely to result from reducing the intensity of shellfish culturing and extending seagrass coverage and mix-typed sediment.

Key words: distribution, biodiversity, biomass, abundance, benthic shellfishes

Fig. 1

Diagram of the sampling sections at Liusha Bay. N, Non-cultured areas; F, Cultured shellfish areas; S, Seagrass beds."

Table 1

Distribution of shellfish species in three different areas of Liusha Bay"


Family
非养殖区
Non-cultured shellfish areas
大型海草床区
Seagrass beds
贝类养殖区
Cultured shellfish areas
种数
Species
比例%
Proportion%
种数
Species
比例%
Proportion%
种数
Species
比例%
Proportion%
蚶科 Arcidae 2 3.4 2 4.1 1 1.8
贻贝科 Mytilidae 4 6.9 4 8.2 4 7.1
江珧科 Pinnidae - - 1 2.0 - -
珍珠贝科 Pteriidae 1 1.7 1 2.0 1 1.8
不等蛤科 Anomiidae - - 2 4.1 2 3.6
牡蛎科 Ostreidae 3 5.2 1 2.0 3 5.4
扇贝科 Pectinidae 2 3.4 1 2.0 - -
帘蛤科 Veneracea 12 20.7 10 20.4 17 30.4
蛤蜊科 Mactridae 1 1.7 1 2.0 1 1.8
樱蛤科 Tellinidae 1 1.7 1 2.0 - -
双带蛤科 Semelisae 1 1.7 1 2.0 - -
紫云蛤科 Psammobiidae - - - - 1 1.8
竹蛏科 Solenidae - - 1 2.0 - -
刀蛏科 Cultellidae 1 1.7 0 0.0 - -
同心蛤科 Lsocardidae - - 1 2.0 - -
棱蛤科 Trapeziidae 1 1.7 1 2.0 1 1.8
绿螂科 Glauconomidae 1 1.7 - - 1 1.8
鸭嘴蛤科 Laternulidae - - - - 1 1.8
马蹄螺科 Trochidae 3 5.2 2 4.1 1 1.8
蝾螺科 Turbinidae 2 3.4 2 4.1 1 1.8
蜒螺科 Neritidae 2 3.4 3 6.1 3 5.4
宝贝科 Cypraeidae - - - - 1 1.8
钥孔虫戚科 Fissurellidae 1 1.7 - - 1 1.8
滨螺科 Littorinidae 2 3.4 - - 2 3.6
汇螺科 Potamididae 4 6.9 3 6.1 5 8.9
蟹守螺科 Cerithiidae 2 3.4 1 2.0 1 1.8
风螺科 Strombidae 1 1.7 1 2.0 0 0.0
玉螺科 Naticidae - - - - 1 1.8
嵌线螺科 Cymatiidae 1 1.7 - - - -
牙螺科 Columbellidae 1 1.7 - - - -
盔螺科 Galeodidae - - 1 2.0 - -
骨螺科 Muricidae 2 3.4 2 4.1 1 1.8
织纹螺科 Nassariidae 4 6.9 2 4.1 3 5.4
笔螺科 Mitridae 1 1.7 2 4.1 1 1.8
阿地螺科 Atyidae 1 1.7 1 2.0 1 1.8
海兔科 Aplysiidae 1 1.7 1 2.0 1 1.8
总计 Total 58 100 49 100 56 100

Fig. 2

The temporal (A & B) and vertical (C & D) distribution of biomass and abundance of benthic shellfishes in different areas of Liusha Bay"

Table 2

The indexes of biodiversity of benthic shellfishes"

海区
Area
航次
Time
指数 Index
d J' H'
非养殖区
Non-cultured shellfish areas
1月 Jan. 0.60 0.81 1.61
3月 Mar. 2.98 0.66 2.69
5月 May 1.36 0.90 2.33
7月 July 1.49 0.78 2.71
9月 Sept. 1.04 0.67 1.87
11月 Nov. 1.20 0.70 2.11
平均 Average 3.04 2.51 0.71
大型海草床区
Seagrass
beds
1月 Jan. 1.03 0.53 1.58
3月 Mar. 1.72 0.38 1.50
5月 May 1.56 0.39 1.34
7月 July 1.05 0.50 1.59
9月 Sept. 0.94 0.33 0.98
11月 Nov. 0.83 0.20 1.46
平均 Average 1.65 1.89 0.48
贝类养殖区
Cultured shellfish areas
1月 Jan. 1.04 0.58 1.84
3月 Mar. 3.56 0.56 2.59
5月 May 1.52 0.42 1.49
7月 July 1.29 0.61 2.02
9月 Sept. 1.04 0.67 1.87
11月 Nov. 0.91 0.56 0.60
平均 Average 1.94 2.57 0.43

Fig. 3

The K-dominance curve of the sample plots"

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