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You X.,Ocean University of China | Li Q.,Chinese Academy of Fishery Sciences | Zhang Y.,Chinese Academy of Fishery Sciences | Xu Y.,Chinese Academy of Fishery Sciences | Jiao H.,Ningbo Academy of Oceanology and Fishery
Chinese Journal of Applied and Environmental Biology | Year: 2013

In order to reveal the health status of the eco-environment of Xihu area in Xiangshan Bay, the sediment and water samples were collected in August 2009, March, May and August in 2010, May and August in 2011. The bacterial community structures and predominant bacterial species were investigated using PCR-Denaturing Gradient Gel Electrophoresis (DGGE), and the correlation between the bacterial community and the main environmental influencing factors were analyzed by using redundancy analysis (RDA). The results of PCR-DGGE showed the dominant bacterial phyla in sediment environment in Xihu area were Proteobacteria, Firmicutes, Bacteroides, Chloroflexi and Acidobacteria. In the bottom part, the dominant bacteria was not obvious in August 2009, but Lactobacillales, Pseudomonadales, Alteromonadales, Chloroflexi and Burkholderiales appeared as alternate dominant groups during the following 5 periods with time going on. For the middle-east part, Lactobacillales, Pseudomonadales, Pseudomonadales, Vibrionales, Pseudomonadales, Lactobacillales were observed as alternate dominant bacteria during the 6 periods. The result of RDA analysis showed that the main environmental influencing factors on the bacterial community structures in the sediment of the bottom part were active silicate, dissolved inorganic nitrogen and chemical oxygen demand, but active silicate, dissolved inorganic nitrogen and ammonia for the sediment of the middle-east part, indicating that the variation of bacterial community structures are the results of the synergistic effects of several environmental factors.


Gu X.-Y.,Ningbo University | Tao L.,Ningbo University | Shi H.-X.,Ningbo Academy of Oceanology and Fishery | Lou D.,Ningbo Academy of Oceanology and Fishery | And 3 more authors.
Chinese Journal of Applied Ecology | Year: 2010

In order to understand the community pattern and biodiversity of macrobenthic fauna in Xiangshan Bay, an eight cruises survey was made at thirteen stations of the Bay from July 2006 to August 2007, with the dominant species composition, richness, biomass, secondary productivity, and P/B value of macrobenthic fauna investigated, and the species diversity of the macrobenthic fauna analyzed. A total of 123 macrobenthos species were recorded, including 48 species Mollusc, 33 species Crustacea, 12 species fish, 12 species annelid polychaete, 8 species echinoderms, and some coelenterates and nematodes. The dominant species were more concentrated, and the dominance index was higher. The average secondary productivity of the macrobenthic fauna was 16. 70 g · m -2 · a -1, and the average P/B value was 0. 60. There existed distinct variations (P<0. 01) in the species richness index (d), evenness index (J), Simpson's diversity index (D), and Shannon diversity index (H) among different survey stations, and distinct variations (P<0. 01) in the indices except evenness index (J) between years.


Jiao H.,Ningbo University | Jiao H.,Ningbo Academy of Oceanology and Fishery | Zheng D.,Ningbo University | Zheng D.,Ningbo Academy of Oceanology and Fishery | And 5 more authors.
Journal of Ocean University of China | Year: 2015

Xiangshan bay is a narrow semi-closed bay and situated on the northwestern coast of the East China Sea. Over past decades, it has become to a major bay with intensive human activities, dense urbanized area, and poor water quality. The aim of this paper was to reveal the ecological status through the elucidation of the species composition, abundance, biomass and diversity of macrobenthos in this bay. Six intertidal sections were surveyed from January 2007 to November 2008 quarterly. Sections TG, HD and XH are located in the three inner bays, sections QJ and WS are located near the thermal power plants, and section XX is located at the outer part of Xiangshan Bay. Great variations in macrobenthos community were indentified, and the species composition of the community in the present study showed the dominance in the order of molluscs (bivalves and gastropods), crustaceans and others, and only few Polychaeta were recorded. Only three dominant species, Littorina brevicula, Ilyplax tansuiensis, and Cerithidea cingulata were collected in all the sections, and a total of 19 dominant species were recorded only in one section. Two-way ANOVA analyses of abundance indicated that there were significant differences among sections or seasons. Shannon-Wiener diversity index (H’) had its maximum (2.45) in section QJ, and minimum (1.76) in section TG. Multiple irregular k-dominance plots clearly showed that the study area was polluted and the macrobenthos community was under stress. We conclude that the macrobenthos of Xiangshan Bay have been disturbed by human activities, especially at the interior bay. © 2015, Science Press, Ocean University of China and Springer-Verlag Berlin Heidelberg.


Zhu Y.-H.,Ningbo University | You Z.-J.,Ningbo University | You Z.-J.,Ningbo Academy of Oceanology and Fishery | Shentu J.-K.,Ningbo Academy of Oceanology and Fishery | And 2 more authors.
Chinese Journal of Applied Ecology | Year: 2012

GC-ECD methods were adopted to determine the residual level of OCPs(including HCHs and DDTs) and PCBs in the surface sediments collected from mudflat shellfish culturing areas in Ningbo, with the sources of the OCPs and PCBs analyzed and the ecological risks of the residual OCPs and PCBs evaluated. The residual level of OCPs was 0.80-32.40 ng·g-1, and that of PCBs was 3.20-33.33 ng·g-1. The HCHs mainly came from long distance atmospheric transportation and historical residues, while the DDTs had new input at some sites, possibly coming from the application of dicofol. At most sites, there existed potential ecological risks of p, p'-DDT and DDTs, with strong indications in Qiangtou and Xidian where the residual level of p, p'-DDT was higher than the effect rang median(ERM), suggesting an ecological menace to the benthos. The residual PCBs at most sites were in low level ecological risk.


Jiao H.-F.,Ningbo Academy of Oceanology and Fishery | Jiao H.-F.,Ningbo University | Shi H.-X.,Ningbo Academy of Oceanology and Fishery | You Z.-J.,Ningbo Academy of Oceanology and Fishery | And 4 more authors.
Chinese Journal of Applied Ecology | Year: 2011

In order to understand the current status of macrobenthos in intertidal zone of Yushan Islands, macrobenthos samples were collected from 5 sections in the intertidal zone in four seasons from March 2009 to January 2010, with the density, biomass, secondary productivity, and P/B value of the macrobenthos investigated by using Brey's empirical formula. The mean density of the marobenthos was 1419.5 ind·m -2, mean biomass in ash free dry mass (AFDM) was 565.53 g·m -2, mean annual secondary productivity was 285.58 g·m -2 ·a -1(AFDM), and mean annual P/B value was 0.51. The secondary productivity was mainly affected by mollusca and gastropda, with five critical species Septifer virgatus, Modiolus modiolus, Serpulorbis imbricata, Tetraclita japonica, and T. squamosa contributed 84.0% of the total. The P/B value in the study area was lower than that in other sea areas, showing that the generation turnover rate of the macrobenthos in the intertidal zone of Yushan Islands was slower, and the community structure was more stable.


PubMed | Ningbo Academy of Oceanology and Fishery, Ningbo University and University College of Applied Sciences
Type: | Journal: Chemosphere | Year: 2016

Organisms at all levels of evolutionary complexity react to hypoxic stress. To clarify the effects of acute hypoxia on physiological and biochemical responses of Larimichthys crocea, we measured the activity levels of the antioxidant enzymes superoxide dismutase and catalase, hemoglobin concentration, functional indices of the liver (aspartate transaminase, alanine transaminase), heart (phosphocreatine kinase), and immune system (alkaline phosphatase), as well as mRNA expression levels of the immunity-related genes Hsp70 and HIF-1 at different time points of hypoxic. In addition, liver, gill, and kidney samples were histologically analyzed. We found that hemoglobin concentration and all enzyme activities increased during hypoxia, although these effects were transient and most indices returned to basal levels thereafter. The extent of the increase in the parameter values was inversely proportional to the dissolved oxygen content. Hsp70 and HIF-1 mRNA expression levels increased significantly in the blood, liver, gills, and kidneys following exposure to hypoxia, which may play an important role in protecting fish against oxidative damage. However, we found histological evidence of hypoxia-induced injuries to the gills, liver, and kidneys, which are involved in breathing, detoxification, and osmotic balance maintenance, respectively. Thus, despite the upregulation of defensive mechanisms, acute hypoxia still caused irreversible damage of organs. In conclusion, we observed that, in response to acute hypoxic stress, L.crocea enhances immune defensive function and antioxidant capacity. A better understanding of the regulation of the molecular anti-hypoxia mechanisms can help speeding up the selective breeding of hypoxia-tolerant L.crocea.


PubMed | Ningbo Academy of Oceanology and Fishery
Type: Journal Article | Journal: Ying yong sheng tai xue bao = The journal of applied ecology | Year: 2011

In order to understand the current status of macrobenthos in intertidal zone of Yushan Islands, macrobenthos samples were collected from 5 sections in the intertidal zone in four seasons from March 2009 to January 2010, with the density, biomass, secondary productivity, and P/B value of the macrobenthos investigated by using Breys empirical formula. The mean density of the marobenthos was 1419.5 ind x m(-2), mean biomass in ash free dry mass (AFDM) was 565.53 g x m(-2), mean annual secondary productivity was 285.58 g x m(-2) x a(-1) (AFDM), and mean annual P/B value was 0.51. The secondary productivity was mainly affected by mollusca and gastropda, with five critical species Septifer virgatus, Modiolus modiolus, Serpulorbis imbricata, Tetraclita japonica, and T. squamosa contributed 84.0% of the total. The P/B value in the study area was lower than that in other sea areas, showing that the generation turnover rate of the macrobenthos in the intertidal zone of Yushan Islands was slower, and the community structure was more stable.

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