Study on species diversity of macrobenthos in Daya Bay,South China Sea

利用2004年3月、5月、9月和12月的大型底栖动物定量采样数据,对大亚湾大型底栖动物的物种多样性进行研究。结果表明,因人类活动影响的加剧,目前大型底栖动物多样性明显低于历史水平。2004年大亚湾海域内共出现79种(类)大型底栖动物,全海域均匀度(J)、丰富度(D)和Shannon-Wiener指数(H′)均值分别为1.17、0.74和2.06。各多样性指数的季节变化较小,不存在显著差异(P>0.05)。多样性水平以冬季0.05).The level of species diversity showed the trend of winter < spring < summer < autumn.It has been found that the distinct change of dry and wet season,the species diversity in wet season was higher than those in dry season.The species diversity of macrobenthos in outer Bay was the highest among other areas.The dominant species of Veremolpa micra and Timoclea scabra were so abundant that the species diversity of macrobenthos in center Bay and inner Bay were low.The seasonal change of the species diversity of macrobenthos in center Bay and inner Bay was caused by the change of the abundance of V.micra and T.scabra.Then the abundance of V.micra and T.scabra fluctuated with the water temperature directly.科技部社会公益研究专项资金项目(2005DIB3J020);; 广东省重大科技兴海项目(A200099E01);; 中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院南海水产研究所)资助项目(2007ZD08);; 农业部海洋与河口渔业重点开放实验室基金项目(开-2-04-15);; 农业部渔业生态环境重点开放实验室开放基金项目(2004-22005-2

Macrobenthic community structure in Daya Bay,South China Sea

利用2004年3月、5月、9月和12月的大型底栖动物定量采样数据,对大亚湾大型底栖动物的群落结构进行研究。结果表明,大亚湾大型底栖动物大致可分为3个群落,分别分布于湾顶及湾中大部分海域、湾中部和湾口海域,湾中部海域群落的变化较为显著。大型底栖动物整体群落结构的季节变化总体较小,但雨季对大型底栖动物群落的影响较大,存在较明显的干湿季差异。大亚湾海域生态环境受到明显的扰动,处于扰动状态中的大型底栖动物群落稳定性较差;湾顶和湾中大部分海域内的群落Ⅰ,为大亚湾的主体群落,以软体动物为主,种类组成单一、季节变化小,以小鳞帘蛤VErEMOlPA MICrA和粗帝汶蛤TIMOClEASCAbrA为特征种。该群落的稳定性最差,处于较强烈的扰动之中;稳定分布于湾口的群落Ⅲ稳定性最好,未受到扰动,以多毛类为主,种类组成较为复杂、变化较大;湾中部海域大型底栖动物群落结构变化较为复杂,主要变化区域为马鞭州附近海域。该群落系经强烈的人为扰动后,经次生演替而形成的新群落,其种类组成的季节变化非常显著,各季的种类几乎完全不同,群落的独立性和抗干扰能力均较弱;与1980'S相比,大亚湾大部分区域内大型底栖动物基本保持了原有的群落,但群落稳定性大幅下降,群落的分布范围和种类组成发生较大程度的改变,主体群落组成呈明显的简单化趋势。在人类活动影响下,湾内同一区域内群落完全演替、湾中部海域出现新的群落。Based on macrobenthos samples collected from 4 survey cruises at 40 research stations in March,May,Sept.and Dec.2004 in Daya Bay,South China Sea,the community structure of macrobenthos was studied.The result showed that macrobenthos community in Daya Bay can be divided into three groups from the inner bay to the main area of the central bay,the central bay and outer bay.The effect of changes between wet and dry seasons on the macrobenthos community structure in Daya Bay was relatively stronger,although seasonal effect on the overall community structure was small.Daya Bay was shown to be ecologically disturbed and the stability of macrobenthic community was weak.Specifically,the inner bay and main area of the central bay was strongly disturbed and was dominated by Group I community that was characterized as simple low stability and dominated by molluscs.Dominant species were Veremolpa micra and Timoclea scabra.The outer bay received little disturbance and the community was most stable.The community belongs to Group Ⅲ that was dominated by polychaete and characterized as complicated and variable.The community change in the central bay was more complicated,concentrated mainly around Maiban Zhou.Its community structure was strongly affected by human disturbance and largely different from other community groups.Species composition of the group was variable which differed largely between seasons.The stability and resilience of the community is low.The current macrobenthic community in Daya Bay is different from the 1980s' state with largely different species composition,reduced community stability and complexity.Overall,under human disturbance,the macrobenthos community in Daya Bay,and particularly in the central bay,changed to a totally different structure.中央级公益性科研院所专项基金资助项目(2007ZD08;2007ST08);国家科技部公益资助项目(2005DIB3J020);广东省重大科技兴海资助项目(A200099E01);国家农业部海洋与河口渔业重点开放实验室基金资助项目(开-2-04-15);国家农业部渔业生态环境重点开放实验室开放基金资助项目(2004-2、2005-2

Variations of fish species diversity,faunal assemblage,and abundances in Daya Bay in 1980-2007.

根据2004—2005年大亚湾海域底拖网鱼类调查数据,并结合1980—2007年的历史资料,分析了该海域鱼类的种类组成、区系特征、多样性、优势种和数量变化趋势.结果表明:2004—2005年,大亚湾海域共记录鱼类107种,分属13目50科,以中下层鱼类的种类最多,为48种,其次是中上层和底层种类,分别为37种和21种.大亚湾鱼类区系具热带和亚热带特性,以暖水性种类占绝对优势,为97种,暖温性种类为10种.多样性指数以夏季最高(3.82),其次是冬季(3.37)和秋季(3.00),春季最低(2.40).PIElOu均匀度指数的季节变化情况与多样性指数相似.1980—2007年大亚湾海域鱼类群落特征发生了明显的变化:鱼类种类数减少,优势种更替明显.鱼类种类数由1980年的157种减少至1990年的110种,2004—2005年继续减少至107种;鱼类优势种由1980年以带鱼和银鲳等优质鱼为主,更替为以小型和低值的小沙丁鱼、小公鱼和二长棘鲷幼鱼为主.用包含年际变化趋势和季节性周期变化的回归模型模拟1980—2007大亚湾鱼类资源密度的变化,鱼类资源密度在1980—1999年和1990—2007年两个时期均呈下降趋势,但1990—2007年间下降幅度比1980—1999年间大;1980—1999年鱼类资源密度的季节波动幅度较平缓(振幅为0.099),而1990—2007年的季节波动较大(振幅为0.420),说明1990—2007年阶段大亚湾鱼类数量的季节变化更为显著.Based on the 2004-2005 otter trawl survey data and the 1980-2007 relevant historical records,this paper analyzed the variations of fish species composition,faunal assemblage,diversity indices,dominant species,and abundance in Daya Bay.In the 2004-2005 trawl survey,a total of 107 fish species were recorded,belonging to 50 families and 13 orders,among which,meso-demersal fish were predominant,with 48 species recorded,and followed by pelagic and demersal fishes,with 37 and 21 species,respectively.The fishes in the Bay belonged to tropical and subtropical fauna,with the dominance of warm water fishes(97 species) and warm-temperate water fishes(10 species).The diversity index was the highest in summer(3.82),followed by in winter(3.37) and autumn(3.00),and the lowest in spring(2.40).The seasonal variation of Pielou evenness index mimicked that of diversity index.In 1980-2007,the characteristics of fish community in the Bay changed obviously.The species number reduced from 157 species in the 1980s to 110 species in the 1990s and to 107 species in 2004-2005,and the dominant species shifted from the high-value fishes such as hairtail and pomfret in the 1980s to low-value fishes such as sardine fish,anchovy,and juvenile porgy.A non-linear regression model composed of inter-annual trend and seasonal cycle was used to simulate the changes of fish stock density in 1980-1999 and 1990-2007,and the results indicated that in the two periods,the fish stock density in the Bay all showed a decreasing trend,but the decrement was larger in 1990-2007 than in 1980-1999.The seasonal variation of the stock density in 1980-1999 was relatively small,with an amplitude being 0.099,while that in 1990-2007 was relatively larger,with the amplitude being 0.420,illustrating that the fish abundance in the Bay had a larger seasonal fluctuation in 1990-2007.中央级公益性科研院所基本科研业务专项(2010YD10、2009TS08)资

Reactor model with cross-flow for aromatics catalytic hydrogenation

[中文文摘]提出了一种抗硫中毒的芳烃加氢催化反应器模型,称之为交叉流反应器模型,把反应物料分为两股,其中含有噻吩的乙苯物料采用轴向连续流动方式由反应器进口进入催化剂床层,而氢气由铅直导管直接进入催化剂床层中,然后与乙苯物料混合。在氢气导管出口处形成含硫乙苯浓度低而氢气浓度高的特殊区域,因而硫对催化剂的中毒效应大幅度降低,整体上提高了乙苯加氢饱和反应效率。与传统轴向混合流反应器进行比较,在相同条件下交叉流反应器具有更好的整体加氢反应性能。分别建立了交叉流反应器与传统轴向混合流反应器模型,提出了两种反应器的催化反应转化率方程;利用此转化率方程,对实验数据进行处理,得到动力学参数,模型的计算结果与实验数据相吻合,也验证了在交叉流反应器中,硫的中毒效应明显减弱。[英文摘要]A novel reactor model named cross-flow reactor for aromatics catalytic hydrogenation was proposed.The reactants were divided into two flows:ethylbenzene with thiophene was introduced to the catalyst bed along the axial direction of the columnar reactor,while hydrogen was introduced into catalyst bed through a vertical pipe with openings.Because special areas with high H2 pressure and low H2S pressure were formed near these openings,the poisoning of catalyst by thiophene was substantially decreased,and consequently the reaction of et hylbenzene hydrogenation was improved as compared with the traditional reactor with mixed co-flow. Finally , kinetic models were established for this cross-flow reactor and the traditional reactor1And the conversion equations of these two reactors were given.By using these equations , the experiments data were fitted to obtain kinetics parameters. The calculation results agreed well with the experimental data. It was also demonst rated that sulfur poisoning in cross-flow reactor was weakened.国家重点基础研究发展计划项目(2004CB217805); 福建省“百千万人才工程”支持项目; 福建省自然科学基金项目(U0750016)

Analysis on the characteristics of macrobenthis community in the North-west Daya Bay of South China Bay in spring

利用2008年春季在大亚湾西北部海域开展的12个测站的大型底栖动物调查资料,对该海域大型底栖动物的群落特征进行分析。结果表明该海域内大型底栖动物优势种由粗帝汶蛤(TIMOClEA SCAbrA)、波纹巴非蛤(PAPHIA undulATA)、上野蜾蠃蜚(COrOPHIuM uEnOI)、方背鳞虫(lEPIdOnOTuS SQuAMATuS)、刀明樱蛤(MOErEllA CulTEr)和角海蛹(OPHElIA ACuMInATA)等6种组成;可划分为4个群落,群落Ⅱ和群落Ⅰ为主体群落,群落Ⅲ和群落Ⅳ分布区较小,群落间差异较大。大型底栖动物数量上以个体较大的软体动物占优,但群落的组成则以多毛类和甲壳类为主,其组成情况基本上反映了群落的特征。群落Ⅰ以多毛类-甲壳类为表征,群落Ⅱ则以甲壳类-多毛类-软体动物为表征。栖息环境的差异,是造成群落间差异的主要原因;群落多样性水平呈群落Ⅲ>群落Ⅱ>群落Ⅰ>群落Ⅳ,沉积环境的污染状况和人为扰动是影响多样性水平的主要因素;群落整体的稳定性较好,未受到明显的扰动,但分布于航道区域和渔业生产作业区的群落Ⅳ和群落Ⅲ,在航道建设、疏浚和渔业生产的影响下,群落受到一定程度的扰动,稳定性较弱。Based on the data collected from 12 research stations in the North-west Daya Bay,South China Sea in spring 2008,the characteristics of macrobenthis community were examined.The results showed that the dominant macrobenthic species were Timoclea scabra,Paphia undulate,Corophium uenoi,Lepidonotus squamatus,Moerella culter and Ophelia acuminate.The macrobenthos community could be divided into four groups with notable differences.Group Ⅰ and Ⅱ were the dominant groups,while the distribution areas of Groups Ⅲ and Ⅳ were relatively small.Overall,molluscs was dominant in quantity in the macrobenthos community but the community was mainly composed of Annelida and Arthropoda,reflecting the characteristics of the community.The dominant macrobenthic species of group Ⅰ were Timoclea scabra,Nephtys oligobranchia,Theora lata,Sigambra hanaokai,Glycinde gurjanvae,Prionospio malmgreni,Timoclea scabra,Turritella bacillum,Corophium tridentium,Phyllodocidae und.,Nectoneanthes alatopalpis,Ericthonius pugnax,Pseudopythina sp.and Stylochus ijimai.Species belonging to this group distributed in the nearshore area of Aotou Harbor and Nanhai Petrochemicals Basement Group Ⅱ assemblage includes Paphia undulata,Timoclea scabra,Corophium uenoi,Prionospio malmgreni,Sigambra hanaokai,Ophelia acuminata,Mediomastus sp.,Nephtys oligobranchia,Moerella culter,Corophium lamellatum,Paraprionospio pinnata and Prionospio pulchra.These species distributed mainly around the Chunzhou Island where suspended long line culture of oyster was common.The discriminating species for Group Ⅰ were S.hanaokai,N.soligobranchia,P.malmgreni,N.alatopalpis and E.pugnax while group Ⅱ were C.uenoi,P.malmgreni,S.hanaokai,N.oligobranchia,T.scabra,M.sp.,Phyllodocidae und.,P.pinnata,O.acuminata,C.lamellatum,M.culter and Chaetozone sp.Group Ⅲ assemblage were mainly found in the west side of Mabianzhou,where it was a fishing ground for Arthropoda in Daya Bay.Group Ⅳ was distributed in area where main shipping routes passed through,in the east side of area of Group Ⅱ and in between the area of Group Ⅰ and Ⅲ.For each community group,while group Ⅱ Group Ⅰ was dominated by Annelida and Arthropoda while Group Ⅱ was dominated by arthropoda,annelida and mollusca;such difference is mainly because of the difference in habitat conditions.Diversity of macrobentho community was highest in Group Ⅲ,followed by Group Ⅱ,Group Ⅰ and then Group Ⅳ.Poor habitat condition caused by pollution,sedimentation and other human disturbances were the main reasons for the differences in diversity between groups.In general,macrobenthos community in the North-west Daya Bay of South China Sea was stable in spring.However,community structure of Groups Ⅳ and Ⅲ,which distributed in the main navigation route and fishing grounds,were less stable;suggesting the disturbances from maintenance of navigation channel and fishing activities might have reduced community stability.中央级公益性科研院所基本科研业务费专项基金(2007ZD08;2007TS08;2010YD10

Change in species composition of macrobenthic fauna before and after administration of artificial reefs in Yangmeikeng in Shenzhen

根据深圳杨梅坑人工鱼礁区投礁前(2007年4月)和投礁后(2008年5月)2个航次调查所获底泥中大型底栖动物的资料,探讨了人工鱼礁对大型底栖动物种类组成的影响。结果表明:投礁一年后,人工鱼礁对大型底栖动物的养护作用已初步显现,海域内大型底栖动物种类数由投礁前的20种提高到34种,环节动物的比例有所增加;投礁后海域内大型底栖动物群落的种类组成也发生了较大变化,投礁前后的种类相似性仅为23.3%,优势种发生了较为明显的变化,由投礁前的方格皱纹蛤PErIglyPTA lACErATE变为投礁后的方格皱纹蛤PErIglyPTA lACErATE、弦毛内卷齿蚕AglAOPHAMuS lyrOCHAETO和单鳃虫nOTHrIA HOlObrAnCHIATA。The change in species composition of macrobenthic fauna was described by the survey data from April of 2007(before establishment of artificial reefs) to May of 2008(after establishment of artificial reefs) to evaluate the influence of artificial habitat in Yangmeikeng in Shenzhen,Guangdong province,China.The protective effect on macrobenthic fauna was observed one year after the reefs had been put,the number of macrobenthos species increasing from 20 species to 34 species.The proportion of Molluscs was found to increase in all groups.The species composition of the macrobenthic fauna changed significantly after the reefs were put,with the similarity of only 23.3% before and after reefs administration,and dominant species changed from Periglypta lacerate before reefs establishment to Periglypta lacerate,Aglaophamus lyrochaeto and Nothria holobranchiata after then.国家“863”计划项目(2006AA100303);中央级公益性科研院所基本科研业务费专项资金项目(2007ZD03;2007TS10;2007ZD08和2007TS22

Bioaccumulation and antioxidant responses in Manila clam （Ruditapes philippinarum） under cadmium and copper exposure

研究了镉(Cd)、铜(Cu)2种重金属单一暴露下菲律宾蛤仔(Ruditapes philippinarum)肝胰腺和鳃组织内的重金属富集特征和抗氧化酶活力变化特点。结果表明,蛤仔肝胰腺与鳃对Cd、Cu的富集量随重金属浓度与暴露时间的增加而增大,具有明显的浓度效应与时间效应;菲律宾蛤仔对Cd的富集能力高于Cu,且肝胰腺中重金属的蓄积量高于鳃;蛤仔肝胰腺和鳃组织中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GPx)和谷胱甘肽硫转移酶(GST)活力在暴露的某些时段被显著诱导(P<0.05),但随暴露时间延长或重金属浓度增加,SOD和GST活力则被显著抑制(P<0.05),而GPx活力随暴露时间延长..

一种谷物流量检测实验平台

本发明属于农业智能装备领域，具体地说是一种谷物流量检测实验平台，包括基架及分别安装在该基架上的进给机构、提升机构、称重机构和动力机构，其中称重机构位于基架的顶部，进给机构位于称重机构的下方；谷物存放在存储箱中，启动动力机构使提升机构达到额定工作转速，打开进给机构中存储箱底部的阀板,谷物在重力作用下流入提升机构，谷物又经过提升机构抛出后，冲击谷物流量传感器反弹进入称重机构。打开称重机构中称重箱底部的挡板，谷物依靠重力回到了存储箱中。本发明使谷物在试验台中可以循环使用，省去了人工对谷物的装载和卸载；本发明的实验平台还具有过载保护功能，保证了过载情况下其他传动部件不被损坏

Three-dimensional target for visual guidance system

本实用新型涉及视觉导引技术领域，具体地说是一种用于视觉导引系统的三维靶标。包括支撑座和安装在支撑座上的三维靶标主体，所述三维靶标主体的外形为圆柱体，所述三维靶标主体的圆柱表面上涂有彩色环形条纹层，所述彩色环形条纹层为多种颜色的油溶性有光漆。木实用新型具有方便安装、维护，识别鲁棒性、稳定性高，导引精度高的优点