Biodiversity Science ›› 2014, Vol. 22 ›› Issue (5): 630-639.doi: 10.3724/SP.J.1003.2014.00109

Special Issue: Mangrove; Marine Biodiversity Special Feature

• Orginal Article • Previous Article     Next Article

Impact of Spartina alterniflora on benthic macro-invertebrates communities on mangrove wetland in Xicungang Estuary, Guangxi

Caiyun Zhao1, Xiaoyan Liu1, Jiade Bai2, Fengchun Lü1, Junsheng Li1, *()   

  1. 1 State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012
    2 Beijing Milu Ecological Research Center, Beijing 100076
  • Received:2014-06-03 Accepted:2014-09-15 Online:2014-10-09
  • Li Junsheng

In order to assess the ecological impacts of Spartina alterniflora on mangrove ecosystems, we investigated macro-invertebrate communities in S. alterniflora wetlands and a mangrove wetland between October 2012 and September 2013, in the Xicungang estuary, Guangxi Zhuang Autonomous Region. The species composition, biomass and diversity of macro-invertebrates were compared at different times between the mangrove habitat and S. alterniflora community. Sixteen species from Arthropoda, Mollusca, Annelida, Cnidadia and Sipuncula were collected from the two habitats. Twelve species were found in mangrove wetlands whereas 10 species were found in S. alterniflora wetlands. Perhaps due to the invasion of S. alterniflora, Glauconome chinensis became the predominant species, leading to a greater macro-invertebrate biomass in S. alterniflora wetlands than in mangrove wetland. On the other hand, the Margalef, Shannon-Wiener index, Simpson and Pieous diversity indices of macro-invertebrates were lower in S. alterniflora habitat than in mangrove habitat. Two-way ANOVA was used to analyze the effect of sampling periods and habitats on the number of species, biomass and diversity indices of macro-invertebrates. Our results showed that Shannon- Wiener index and Simpson diversity indices differed between the two habitats, the Margalef and Pieous diversity indices differed among sampling periods, number of species and biomass were affected by both habitats and sampling periods. Based on multiple linear regression analyses, macro-invertebrate biomass was related to the density of S. alterniflora, and Shannon-Wiener, Simpson diversity and species richness of macro-invertebrates were all related with the height of S. alterniflora. According to our NMDS (non-metric multidimensional scaling) analysis, macro-invertebrate communities in S. alterniflora habitat mainly differed from those of mangrove habitats due to sampling periods. In conclusion, the invasion of S. alterniflora in mangrove wetlands in Xicungang estuary increased the biomass of macro-invertebrates, while decreased the diversity of them, and also changed the community structure of macro-invertebrate assemblages.

Key words: macro-invertebrates, Spartina alterniflora, community structure, biodiversity biological invasion

Fig. 1

Locations of macro-invertebrates sampling sites in Xicungang, Beihai city, Guangxi Province. S represents Spartina alterniflora community, and M represents mangrove wetland."

Table 1

Species composition of macro-invertebrates in Spartina alterniflora and mangrove in Xicungang"

门 Phyla 纲 Class 科 Family 种 Species 互花米草Spartinar alterniflora 红树林Mangrove
甲壳纲 Crustacea 和尚蟹科 Mictyridae 短指和尚蟹 Mictyris brevidactylus + +
沙蟹科 Ocypodidae 沙蟹 Ocypodidae, sp. + +
弧边招潮蟹 Uca arcuata - +
藤壶科 Balanuidae 藤壶 Balanus sp. - +
腹足纲 Gastropoda 汇螺科 Potamididae 汇螺 Potamididae, sp. - +
滨螺科 Littorinidae 黑口拟滨螺 Littoraia melanostoma + +
蜑螺科 Neritidae 奥莱彩螺 Clithon oualaniensis + +
双壳纲 Bivalvia 满月蛤科 Lucinidae 满月蛤 Lucinidae, sp. + -
绿螂科 Glauconcomidae 中国绿螂 Glauconome chinensis ++ +
樱蛤科 Tellinidae 透明美丽蛤 Tellina diaphana - +
多板纲 Polyplacophora 锉石鳖科 Ischnochitonidae 锉石鳖 Ischnochitonidae, sp. - +
石鱉科 Chitonidae 石鳖 Chitonidae, sp. + +
多板纲 Polyplacophora 多板 Polyplacophora, sp. + -
环节动物门 Annelida 多毛纲 Polychaeta 沙蚕科 Nereididae 沙蚕 Nereididae, sp. + -
星虫动物门 Sipuncula 方格星虫纲 Sipunculidea 方格星虫科 Sipunculidae 裸体方格星虫 Sipunculus nudus - +
腔肠动物门 Cnidaria 珊瑚纲 Anthozoa 石珊瑚目 Madreporaria 石珊瑚 Madreporaria, sp. + -

Fig. 2

Comparison of the number of macro-invertebrates (A) and biomass (B) in Spartina alterniflora community and mangrove at different sampling time"

Table 2

Biomass of macro-invertebrates in different habitats and different seasons in Xicungang"

方格星虫纲Sipunculidea 珊瑚纲 Anthozoa 合计
2012.10 互花米草 Spartina alterniflora 0.040 0.008 3.063 0.030 0.005 0.00 0.005 3.151
红树林 Mangrove 0.094 0.037 0.057 0.00 0.00 0.00 0.00 0.188
2012.12 互花米草 Spartina alterniflora 0.002 0.00 2.997 0.00 0.00 0.00 0.00 2.999
红树林 Mangrove 0.206 0.00 0.144 0.00 0.00 0.00 0.00 0.350
2013.5 互花米草 Spartina alterniflora 0.020 0.060 0.435 0.00 0.002 0.00 0.00 0.517
红树林 Mangrove 0.008 0.006 0.00 0.00 0.00 0.00 0.00 0.014
互花米草 Spartina alterniflora 0.028 0.043 15.747 0.032 0.00 0.00 0.00 15.850
2013.9 红树林 Mangrove 0.087 0.003 0.335 0.074 0.00 0.030 0.00 0.530
合计 Sum 0.486 0.157 22.778 0.136 0.006 0.030 0.005 23.598

Fig. 3

Diversity indices of macro-invertebrates across mangrove and Spartina alterniflora in Xicungang, Beihai"

Fig. 4

Non-metric multidimensional scaling (NMDS) plots for the benthic macro-invertebrates at Xicungang marshes at different sampling time"

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