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Mean trophic level of coastal fisheries landings in the Persian Gulf(Hormuzgan Province), 2002–2011

Chinese Journal of Oceanology and Limnology 2017年第3期35卷 528-536页

作者： Marzieh RAZZAGHI Sakineh MASHJOOR Ehsan KAMRANI Marine Biology Department Faculty of Marine Science and TechnologyHormuzgan University.Bandar-e-abbasIran Young Researchers Club Bandar-e-abbas BranchIslamic Azad UniversityBandar-e-abbasIran Young Researchers Club Ahvaz BranchIslamic Azad UniversityAhvazIran

Fishing activities can alter the structure of marine food webs by the selective removal of some species. The changes in the marine food webs of the Hormuzgan waters of the Persian Gulf, Iran were assessed, based on estimates of the mean trophic index （MTI） and Fishing in Balance index （FIB）, and on landing profile of the exploited marine community （49 species） during the period, 2002-2011. The total landings （Yt）（R=0.88, P〈0.001） increased gradually while the Y~ of carnivores has slightly declined, and the Yt of herbivores, detritivores and omnivores has increased. Consequently, the MTI significantly decreased （R=-0.69, P〈0.05） at a rate of 0.1 l during this decade. The MTI showed a decreasing trend, which indicates exploitation of marine resources. The FiB index also showed a downward trend and negative values from 2002 to 2009, which may be associated with unbalanced structure in the fisheries, but an upward trend from 2009 to 20ll. The time variation of the landing profile showed two periods with significant differences in their species composition （R=0.88; P=0.005）, and based on analysis of similarity, species have been identified as discriminator species, namely Thunnus albacores and Benthosema pterotum. Results indicate that changes in MTI reflected changes in the Hormuzgan landing structure. The examination of the MTI, FBI, and landing profile （LP） temporal pattern suggests that the status of fishery resources in Hormuzgan inshore waters is overexploited, and provides evidence of the probability that a fishing down process is occurring in this area, and that this trend may continue in the long-tenn. Therefore, environmental fisheries management and conservation programs should be prioritized for these valuable resources.

关键词： fishing-in-balance index trophic level landings Hormuzgan Persian Gulf

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A Pilot Study of trophic level and Human Origins at the Xiaoshuangqiao Site, China(ca. 1400 BC) Using 8D Values of Collagen

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1884-1892页

作者： WANG Ning LI Suting HU Yaowu SONG Guoding School of History Culture and Tourism Jiangsu Normal University Xuzhou 221116 China Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Palaeontology and Palaeoanthropology Chinese Academy of Sciences Beijing 100044 China Henan Provincial Institute of Cultural Relics and Archaeology Zhengzhou 450000 China Department of archaeology and anthropology University of Chinese Academy of Sciences Beijing 100049 China

We present here a pilot study to examine trophic level effects and migration patterns at the middle Shang Dynasty site of Xiaoshuangqiao in Henan Province using δD results combined with δ^13C and δ^15N values. A total of 33 specimens（17 humans, 7 cattle, 5 pigs, 3 sheep, 1 dog） of bone collagen were isotopically analyzed for δ^13C, δ^15N, and dD values. A strong positive correlation（R^2 = 0.94）between mean δ^15N and δD values of herbivores（cattle and sheep）, omnivores（pig）, carnivores（dog）and humans was observed. The δD results were found to increase by -10‰ to 20‰ from herbivores to omnivores to carnivorous, evidence that collagen δD results are a useful indicator for the study of trophic levels and dietary patterns at archaeological sites. The δD results were also used to examine the origins of two different groups of individuals buried at Xiaoshuangqiao. Individuals buried in sacrificial pits of district V had mean δD values（-47.0 ± 2.9‰, n = 11） that were significantly（p =0.049） elevated compared to the people buried in the stratigraphy of district IX（-51.3 ± 3.3‰, n = 3）,indicating that they were ingesting water from different locations. In addition, the D values of the people buried in the stratigraphy were similar to the pigs（-54.5 ± 4.2‰, n = 5） at Xiaoshuangqiao,suggesting that they were most probably of the local population, and that the individuals buried in the sacrificial pits were most possibly from the coast and prisoners of the Dongyi（“东夷”）people. Thus,δD results have the potential to examine human origins and migration patterns and should be increasingly used in conjunction with δ^13C and δ^15N values at archaeological sites.

关键词： Hydrogen stable isotope ratios trophic level migration collagen Xiaoshuangqiao site

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Study on the feeding habit and trophic level of main economic invertebrates in the Huanghai Sea

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Acta Oceanologica Sinica 1999年第1期18卷 117-126页

作者： Cheng Jisheng Zhu Jinsheng and Jiang Weimin Huanghai Sea Fisheries Research Institute Qingdao 266071 China

The stomach contents of 14 main invertebrates in the Huanghai Sea are analyzed. The results indicate that: (1) the examined predator species were all omnivore with wide md range, showing no obvious selection for specific fed items, (2) on the basis of their ecological habitat, the predators could be classified into 5 different types, i.e., benthoelagic and planktopelagic animals, nektopelagic and planktopelagic animals, benthopelagic animals, nektopelagic and benthopelagic animals, and nektopelagic animals and (3) the trophic level of the 11 predator species, including Crangon affinis, Palaemon gravieri, Penaeus orientalis, Trachypenaeus curvirostris, Metapenaeopsis dalei, Portunus trituberculatus, Charybdis bimaculata, Oratosquilta oratoria, Sepia andreana, Loligo beka and L. japonica ranged from 2. 30 to 2. 72, belonging to low carnivore (trophic level: 2. 0~ 2. 8), whereas that of the other 3 predator species, including Sepia esculenta, Sepiella maindroni and Todarodes pacificus were in the range of 2. 86~ 2. 97, belonging to mid-carnivore (trophic level: 2. 9 ~3. 4).

关键词： Huanghai Sea invertebrates feeding habit trophic level

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Foodweb trophic level and Diet Inference Using an Extended Bayesian Stable Isotope Mixing Model

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Open Journal of Ecology 2022年第6期12卷 333-359页

作者： Erik Barry Erhardt Rachel Marie Wilson Department of Mathematics and Statistics University of New Mexico Albuquerque NM USA Department of Earth Ocean and Atmospheric Sciences Florida State University Tallahassee FL USA

You are what you eat (diet) and where you eat (trophic level) in the food web. The relative abundance of pairs of stable isotopes of the organic elements carbon (e.g., the isotope ratio of 13C vs 12C), nitrogen, and sulfur, among others, in the tissues of a consumer reflects a weighted-average of the isotope ratios in the sources it consumes, after some corrections for the processes of digestion and assimilation. We extended a Bayesian mixing model to infer trophic positions of consumer organisms in a food web in addition to the degree to which distinct resource pools (diet sources) support consumers. The novel features in this work include: 1) trophic level estimation (vertical position in foodweb) and 2) the Bayesian exposition of a biologically realistic model [1] including stable isotope ratios and concentrations of carbon, nitrogen, and sulfur, isotopic fractionations, elemental assimilation efficiencies, as well as extensive use of prior information. We discuss issues of parameter identifiability in the complex and most realistic model. We apply our model to simulated data and to bottlenose dolphins (Tursiops truncatus) feeding on several numerically abundant fish species, which in turn feed on other fish and primary producing plants and algae present in St. George Sound, FL, USA. Finally, we discuss extensions from other work that apply to this model and three important general ecological applications. Online supplementary materials include data, OpenBUGS scripts, and simulation details.

关键词： Stable Isotope Animal Ecology trophic level Animal Diet Informative Priors

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Distribution, bioaccumulation, trophic transfer and risk assessment of trace elements in fish from a typical shallow outflow lake basin, China

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Frontiers of Environmental Science & Engineering 2024年第7期18卷 141-156页

作者： Miao He Guijian Liu Xiaodan Shi Lei Wu Qiang Chen CAS Key Laboratory of Crust-Mantle Materials and Environment School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Anhui Academy of Environmental Sciences Hefei 230022China School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China

Fish are important food sources for humans,and the availability of appropriate amount of trace elements(TEs)plays a crucial role in fish ***,due to large volumes of sewage discharge,high levels of certain elements are present in aquatic environments,and these elements accumulate in fish and potentially affect human *** this study,the distribution and bioaccumulation capacity of trace elements in six dominant fish species from Chaohu Lake(China)were *** results showed that the bioaccumulation capacity of fish for Zn was greater than other *** the source of the TEs in the fish were explored along with the concentration of the TEs in the aquatic environment,which indicated that TEs in fish were mainly obtained through ingestion and indirectly affected by the industrial activities in the ***,stable carbon and nitrogen isotopes were used to classify the trophic levels and explore the biological magnification of TEs of the *** was found that Sb and Sr showed biomagnification with the increase of trophic level of *** on the above analyses,the environmental biogeochemical cycle model of TEs in the lake was distinguished and established,which can offer valuable insights for sustainable fishery management in the downstream Yangtze River Delta ecosystem.

关键词： trophic level Bioaccumulation Risk assessment Trace elements

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Food web structure and trophic levels in polyculture ricecrab fields

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Chinese Journal of Oceanology and Limnology 2015年第3期33卷 735-740页

作者：郭凯赵文李文宽赵苑淞张鹏张晨 Key Laboratory of Hydrobiology in Liaoning Province Dalian Ocean University Freshwater Fisheries Science Institute of Liaoning Province

Stable carbon and nitrogen isotopes were used to investigate nutrient pathways and trophic relationships from the rice-crab system in Panjin, Liaoning Province, China. Values of 313C ranged from -27.38%±0.44%o to -18.34%±0.26%o and δ^15N ranged from 1.10%o4-0.88%o to 9.33%±0.57%. Pseudorasbora parva （Stone moroko） had the highest δ^13C and 8tSN values. The lowest δ^13C values were obtained for the macrophytes and the lowest δ^15N value was found in sediments. Stable carbon and nitrogen isotopes were used to determine the contribution of different food items to the diets of crabs. The δ^13C results indicated that the Pseudorasbora parva made the greatest contribution to the diet of Eriocheir sinensis （Chinese mitten crab）, while the δ^15N results indicated that most food items contributed more than 10% to the diet of the crab. There were three trophic levels identified in the system （levels 0-2）. The crab Eriocheir sinensis, fish Pseudorasbora parva and Misgurnus anguillicaudatus （Oriental weatherfish）, and the oligochaete Limnodrilus hoffmeisteri （Limnodrilus worm）, were at the second level, zooplankton were at the first level and suspended particulate matter and macrophytes were at trophic position 0.

关键词： rice-crab culture Eriocheir sinens stable carbon isotope stable nitrogen isotope trophic level

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Determination of trophic levels of marine fish in the Yellow Sea and northern East China Sea using nitrogen stable isotope (δ^(15)N) analysis of otoliths

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Journal of Oceanology and Limnology 2022年第2期40卷 634-642页

作者： Huaiyu BAI Yukun WANG Tingting ZHANG Fangqun DAI Lingfeng HUANG Yao SUN College of the Environment and Ecology Xiamen UniversityXiamen 361102China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems Xiamen UniversityXiamen 361005China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266071China

Fish otolithδ^(15) N(δ^(15) N_(oto))is a demonstrated source of information of dietary history for marine fi sh as it is available iN_(oto)lith archives and sedimentary deposits unlike white muscle tissue(WMT).WMT and stomach content data are insufficient for trophic level(TL)data of past fi shes which is important for the changes of marine fi shery resources over long time *** determine the correlation betweenδ^(15) N_(oto) and fi sh WMTδ^(15) N(δ^(15) N_(wmt))and the feasibility of usingδ^(15) N_(oto) in characterizing the TLs of marine fi shes,we conducted nitrogen stable isotope analysis(SIA)in the otolith and WMT of 36 marine fi sh species sampled from the Yellow Sea and northern East China Sea in ***δ^(15) N_(oto) andδ^(15) N_(wmt) were analyzed using an elemental analyzer coupled with an isotope ratio mass spectrometer(EA-IRMS).Multiple otoliths were combined to make each otolith measurement and were analyzed as-is without a carbonate dissolution pre-processing step.δ^(15) N_(oto) andδ^(15) N_(wmt) comparisons for species in the Yellow Sea and northern East China Sea are currently lacking and would be helpful for both regional studies and for increasing the number of species for whichδ^(15) N_(oto) andδ^(15) N_(wmt) have been ***,to determine the relative accuracy of trophic level calculated usingδ^(15) N_(oto),we compared TL calculated fromδ^(15) N_(oto) to traditional trophic level metrics calculated usingδ^(15) N_(wmt).The results showed a positive and highly signifi cant correlation(R=0.780,Ptrophic level estimation using WMT(TL wmt)and otolith(TL oto)showed congruence in our study,which is not entirely surprising given thatδ^(15) N_(oto) was regressed againstδ^(15) N_(wmt) and the resulting regression coefficient was used to convertδ^(15) N_(oto) toδ^(15) N_(wmt) prior to calculating TL *** conversion was required in order to be consistent with previousδ^(15) N_(wmt)-b

关键词： stable isotope analysis δ^(15)N otolith trophic level

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trophic relationships in the Changjiang River estuarine salt marshes: preliminary investigation from δ^(13)C and δ^(15)N analysis

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Acta Oceanologica Sinica 2009年第3期28卷 50-58页

作者： QUAN Weimin HUANG Danqing CHU Tianjiang SHENG Qiang FU Cuizhang CHEN Jiakuan WU Jihua Coastal Ecosystems Research Station of Yangtze River Estuary Ministry of EducationKey Laboratory for Biodiversity Science and Ecological Engineering Fudan UniversityShanghai 200433 China

To obtain information on food web structure in salt marshes of the Changjiang （Yangtze） River Estuary, the （ δ3C and δ15N values of primary producers and consumers were determined. The mean δ13C values of 31 dominant consumers ranged from -23.13‰ to -14.37‰. Except for several species （ Eriocheir sinensis, Sinonovacula constricta and Potamocorbula ustulata）, consumers had interme- diate δ13C values between those of benthic microalgae and Spartina alterniflora. The mean δ15N values of 31 dominant consumers varied between 6.87‰ and 13.33‰, which indicate three trophic levels in salt marshes of the Changjiang River Estuary. A total of 18 macroinvertebrates species and four fish species represented primary consumers with trophic levels ranging from 2.0 to 2.7. Secondary consumers included two maeroinvertebrates and seven fishes with trophic levels varying between 3.0 and 3.9. The consumers were divided into three trophic guilds, i.e., detritivorous/algae feeders, omnivores and carnivores. The detrital food chain was the main energy flow pathway in the salt marsh food web of the Changjiang River Estuary, and the marsh vascular plants were at least as equally important as microphytobenthos for secondary production. The important trophic function of the salt marsh habitats in the estuary is revealed.

关键词： energy base food web salt marshes stable isotope trophic level Changjiang River Estuary

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Stable isotopes in aquatic food web of an artificial lagoon in the Hangzhou Bay,China

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Chinese Journal of Oceanology and Limnology 2010年第3期28卷 489-497页

作者：全为民施利燕陈亚瞿 Key and Open Laboratory of Marine and Estuarine Fishery Resources and Ecology Ministry of Agriculture East China Sea Fishery Research Institute Chinese Academy of Fishery Science

Stable isotope values, δ13C and δ15N, were determined for four primary producers and 19 dominant consumers in a small artificial lagoon located in Hangzhou Bay. Based on these results the major pathways for energy flow and trophic structure of the artificial lagoon ecosystem were characterized. The mean δ13C values for the 19 consumers ranged from -22.99‰ to -14.24‰. Apart from so-iny mullet Liza haematocheila, the other 18 consumers had intermediate δ13C values between those of epibenthic microalgae and particulate organic matter (POM). The results of a multiple source linear mixing model (IsoSource model) indicated that 50% or more of the organic carbon in the tissues of most consumers was derived from epibenthic microalgae. This indicated that these primary producers were the main food source fueling the lagoon food web. The mean δ15N values for the 19 consumers varied between 4.93‰ and 12.97‰ and indicated four trophic levels in the lagoon. Four macroinvertebrates and zooplankton represented the primary consumers, whilst the other 14 consumers occupied the secondary and tertiary consumer levels. The 19 consumers were divided into three trophic guilds (detritivores/suspension feeders, omnivores and carnivores).

关键词： isotope ^13C ^15N lsoSource model trophic level food web

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Cascade effects of crop species richness on the diversity of pest insects and their natural enemies

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Science China(Life Sciences) 2014年第7期57卷 718-725页

作者： SHI PeiJian HUI Cang MEN XingYuan ZHAO ZiHua OUYANG Fang GE Feng JIN XianShi CAO HaiFeng LI B.Larry State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of ZoologyChinese Academy of Sciences Key Laboratory of Sustainable Development of Marine Fisheries Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery Sciences Centre for Invasion Biology Department of Botany and ZoologyStellenbosch University Institute of Plant Protection Shandong Academy of Agricultural Sciences Ecological Complexity and Modeling Laboratory University of California

Understanding how plant species richness influences the diversity of herbivorous and predatory/parasitic arthropods is central to community *** explore the effects of crop species richness on the diversity of pest insects and their natural *** data from a four-year experiment with five levels of crop species richness,we found that crop species richness significantly affected the pest species richness,but there were no significant effects on richness of the pests’natural *** contrast,the species richness of pest insects significantly affected their natural *** findings suggest a cascade effect where trophic interactions are strong between adjacent trophic levels,while the interactions between connected but nonadjacent trophic levels are weakened by the intermediate trophic *** crop species richness resulted in a more stable arthropod community compared with communities in monoculture *** results highlight the complicated cross-trophic interactions and the crucial role of crop diversity in the food webs of agro-ecosystems.

关键词： trophic level stability generalized additive model monoculture polyculture

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