基于稳定同位素技术的长江中游干流生态系统食物网结构及能量来源研究
发布时间：2018-09-13 10:56
【摘要】：长江中游干流鱼类资源丰富,是产漂流性卵鱼类的主要栖息和繁殖场所,以江湖洄游性鱼类(青鱼Mylopharyngodon piceus、草鱼Ctenopharyngodon idellus、鲢Hypophthalmichthys molitrix和鳙Aristichthys nobilis)和定居性鱼类(鲤Cyprinus carpio、鱼即Carassius auratus等)为主。长江中游干流生态系统受到三峡大坝和葛洲坝建设、酷渔滥捕、江湖阻隔和水体污染等多重因素的叠加影响,渔业资源持续衰退,水生态系统服务功能趋于衰弱,本文通过在长江中游干流宜昌至湖口江段2011和2013～2014年所采集鱼类和食物网中其它生物样品,利用δ13C、δ15N稳定性同位素技术,研究了长江中游干流江段水生态系统中主要鱼类营养级、食物网结构及能量来源、悬浮颗粒有机物(POM)δ13C、δ15N稳定性同位素特征和鳍条替代白色肌肉在青鱼、鲢稳定性同位素研究中的有效性,探讨了长江中游干流生态系统鱼类食物网及能量来源及其潜在影响,研究将有利于了解目前长江中游干流渔业生态系统状况、渔业资源变化及其趋势,能为渔业资源的可持续利用及其生态系统保护方面提供必要的基础数据和技术支撑。主要研究结果如下：1.应用稳定性同位素技术(δ13C、δ15N)对2011年3月、9月,2013年7月、9月和12月采自长江中游干流宜昌、荆州、石首、监利、城陵矶、鄂州、九江和湖口江段的44种鱼类和3种水生无脊椎动物进行了营养级研究。结果显示,长江中游干流鱼类的813C值范围为-33.83‰(鳙)～17.36‰(南方鲶Silurus meridionalis),815N值范围为4.83‰(泥鳅Misgurnus anguillicaudatus)～15.13‰(翘嘴湆Culter alburnus)。以梨形环棱螺(Bellamya purificata)的δ15N均值5.48%o作为营养级基准线(营养级=2),计算出该江段水生动物的营养级处于2.42～4.88,主要集中在2.83～3.61之间,鱼类平均营养级为3.28,营养级大于2.83的鱼类种类数量占了总生物种数的80.85%,其食性竞争压力较大,生态位重叠。大刺鳅(Mastacembelus armatus)和鳊Parabramis pekinensis)营养级最低,分别为2.42+0.49和2.56+0.52,营养层级大于4.0的高级消费者为太湖新银鱼(Neosalanx taihuensis)、短颌鲚(Coilia brachygnathus)、鳙和长蛇泩(Saurogobio dumerili),分别为4.88+0.01、4.37±0.27、4.32±0.35和4.09±0.78,小黄黝鱼(Micropercops swinhonis)、溼(Elopichthys bambusa)、鳜(Siniperca chuatsi)、翘嘴湆、青鱼和南方鲶的营养级分别3.99、3.92±0.16、3.89±0.27、3.87+0.62、3.59±0.69和3.59+0.57。2.对2011年3月、9月,2013年7月、9月、12月和2014年3月采自长江中游干流宜昌、荆州、城陵矶、鄂州和湖口江段鱼类、POM、底栖动物和水生植物等应用碳氮稳定性同位素技术构建了这5个江段水生态系统在丰水期和枯水期食物网结构。宜昌江段丰水期处于食物网顶端的鱼类主要为铜鱼(Coreius heterokon)、翘嘴湆和鳙,鱼类营养级可分为3个层次,鲤、鳊和赤眼鳟等鱼类在鱼类食物网结构中所处位置较低；在枯水期鳙和鳜的营养位置最高,鳊和鲤仍处于较低营养级位置。荆州江段丰水期处于高营养级位置的鱼类为太湖新银鱼、短颌鲚、黄尾鲴(Xenocypris davidi)、乌鳢(Channa argus)和鳜,主要鱼类营养层级有3个,中间层级鱼类食性竞争压力较大,在枯水期,短颌鲚、鳙、小黄黝鱼、麦穗鱼(Pseudorasbora parva)、圆尾斗鱼Macropodus ocellatus)和翘嘴湆处于食物网高营养级位置。城陵矶江段丰水期食物网营养层级有4个,鳜、短颌鲚、南方鲇、溼和翘嘴湆处于鱼类食物网高营养级位置,在枯水期,处于食物网较高营养层级的鱼类为短颌鲚、溼和南方鲇。鄂州江段在丰水期鱼类食物网中,翘嘴湆、南方鲇、青鱼、溼和鳜营养层级最高,鳙、草鱼和鳊营养级位置较低；在枯水期,食物网中营养级位置较高的为南方鲇、溼、乌鳢和青鱼,餐(Hemicculter leuciclus)、草鱼、鳊营养位置较低。湖口江段丰水期鱼类食物网可分为4个层级,翘嘴湆、短颌鲚、长蛇泩、南方鲇、鳜和青鱼处于较高营养层级,鲢、鳊、草鱼和(?)处于较低营养级位置；在枯水期,翘嘴湆、花(?)Hemibarbus maculatus)和唇(?)(Hemibarbus labeo)营养级位置较高,鲢、草鱼、鳙(?)在食物网中处于较低营养层级。在长江中游江水流向梯度上,长江中游干流宜昌至湖口江段主要鱼类的δ13C值随江水流向有总体降低趋势,鱼类的δ15N值变化不大。3.结合IsoSource模型,利用稳定性同位素技术研究和探讨了三峡大坝建成蓄水后长江中游干流宜昌至湖口江段9种主要经济鱼类(草鱼、鲢、鲤、鳊、南方鲇、鳜、鲫、黄颡鱼(Pelteobagrus fulvidraco)和翘嘴湆)的能量来源及其所受影响。草鱼、鲢和鲤等9种主要经济鱼类的813C、δ15N值范围分别为-29.25±3.22(鲢)～-24.26±2.8(鳊)、8.42±1.9(鲤)～11.67±0.9(鳜)。鱼类的C/N比值范围处于3.26+0.12(鲢)～4.23±0.9(黄颡鱼),除鲫和黄颡鱼外,其余7种主要经济鱼类的C/N比值都较为接近。通过IsoSources模型计算了长江中游干流江段4种潜在碳源(悬浮颗粒有机物(POM)、固着藻类、C3植物和C4植物)对这9种主要经济鱼类能量贡献的频率,发现其能量来源以POM和C3植物为主。4.为了解三峡水库蓄水后长江中游干流江段鱼类食物网主要能源之一的POM时空变化特征及组成来源,于2013年7月至2014年3月,对长江中游干流宜昌、石首、城陵矶、鄂州和九江江段悬浮颗粒有机物的碳稳定性同位素(δ13 CPOM)和氮稳定性同位素(δ15NPOM)进行了研究。结果显示,长江中游干流江段δ13CPOM值变化介于-25.21‰～-19.12%o,δ15NPOM值变化介于2.58%o～8.78‰,C/N平均值变化介于6.99～15.5,δ13CPOM在7月份最高,在3月和12月较低,这可能主要与7月份洪汛期降雨导致大量外源有机物流入而引起的POM组成变化有关。通过方差分析发现δCPOM在3月和12月没有显著性差异,其余月份间均存在显著性差异(p0.001),各采样点之间没有显著性差异。δ15NPOM在7月和9月有显著性差异(p0.001),其余月份间均不存在显著性差异,各采样点之间城陵矶和九江江段有显著性差异(p0.001),其余各采样点之间没有显著性差异。运用二元混合模型计算结果显示,长江中游干流江段POM组成以陆源有机质为主,平均贡献率为72.8%并存在明显的季节性变化,陆源有机质所占的比例在7月洪汛期高(81%～92%),3月和12月枯水期低(20%～53%),同长江径流量关系较为密切。三峡水库和长江上游众多水库群的蓄水及削减洪峰的调度方式、长江中游干流江段大规模的河道护坡活动,导致河源物质、洪泛区域物质和滨岸带植被等外源性碳源输入受到较大影响,长江中游干流江段可能会逐渐失去作为大型洪泛河流生态系统典型的能量循环和流动模式。5.稳定性同位素分析技术已广泛应用于水生态系统中营养关系和能量流动研究,在鱼类方面,通常是将其处死后取背部白色肌肉用于样品分析,因此使用非致命性采样替代其肌肉组织用于同位素分析研究正愈发受到关注和尝试。目前国内还未见使用鱼类鳍条替代肌肉用于相关研究的报道。本研究比较了青鱼、鲢鳍条与肌肉组织中δ13C和δ15N比值,青鱼的鳍条δ13C比值比肌肉平均高0.44‰,615N比值比肌肉平均高0.09‰。鲢的鳍条813C比值比肌肉平均高0.22‰,δ15N比值比肌肉平均高0.66‰。对青鱼、鲢的鳍条与肌肉组织δ13C和δ15N比值构建线性模型发现,青鱼、鲢的鳍条与肌肉组织δ13C和δ15N比值存在显著性相关(R20.9,p0.001)。可采用非致命采样的鳍条组织替代其白肌肉应用稳定性同位素技术研究青鱼、鲢在食物网中的营养级位置。
[Abstract]:The main stream of the middle reaches of the Yangtze River is rich in fish resources. It is the main habitat and breeding place for drifting egg-laying fish. The migratory fish (Mylopharyngodon piceus, Ctenopharyngodon idellus, Hypophthalmichys molitrix and Aristichthys nobilis) and the settled fish (Cycarpcarpius, Carassauratus, etc.) The main stream ecosystem of the middle reaches of the Yangtze River is affected by the construction of the Three Gorges Dam and Gezhouba Dam, excessive fishing, barrier between rivers and lakes and water pollution. Fishery resources continue to decline, and aquatic ecosystem service function tends to weaken. By using stable isotope techniques of delta 13C and delta 15N, the nutrient levels, food web structure and energy sources of main fishes, stable isotope characteristics of suspended particulate organic matter (POM) Delta 13C, Delta 15N and fin substitution for white muscle in the aquatic ecosystem of the middle reaches of the Yangtze River were studied. The validity of the study was discussed. The fish food web, energy sources and their potential impacts in the mainstream ecosystem of the middle reaches of the Yangtze River were discussed. The study will be helpful to understand the current status of the fishery ecosystem, the changes and trends of fishery resources in the mainstream ecosystem of the middle reaches of the Yangtze River. The main results are as follows: 1. The nutrient levels of 44 species of fish and 3 species of aquatic invertebrates collected from Yichang, Jingzhou, Shishou, Jianli, Chenglingji, Ezhou, Jiujiang and Hukou sections of the middle reaches of the Yangtze River in March, September, July, September and December 2011 were studied by using stable isotope technique (delta 13C, Delta 15N). The results showed that 813C values of fish in the middle reaches of the Yangtze River ranged from - 33.83 (bighead) to 17.36 (Silurus meridionalis), and 815N values ranged from 4.83 (Misgurnus anguillicaudatus) to 15.13 (Culter alburnus). The mean value of delta N of Bellamya purificata was 5.48% as the baseline line of Trophic Grade (Ying). The nutrient level of aquatic animals in this reach is 2.42-4.88, mainly between 2.83-3.61, the average nutrient level of fish is 3.28, and the number of fish species whose nutrient level is greater than 2.83 accounts for 80.85% of the total number of species. The competition pressure of feeding habits is high, and the niche overlaps. Innsis had the lowest nutrient levels, which were 2.42+0.49 and 2.56+0.52, respectively. The top consumers with nutrient levels greater than 4.0 were Neosalanx taihuensis, Coilia brachygnathus, bighead carp and Saurogobio dumerili, which were 4.88+0.01, 4.37+0.27, 4.32+0.35 and 4.09+0.78, respectively. The nutrient levels of Elopichthys bambusa, Siniperca chuatsi, Snakehead, Qingyu and Southern Catfish were 3.99, 3.92+0.16, 3.89+0.27, 3.87+0.62, 3.59+0.69 and 3.59+0.57.2 respectively. The structure of food webs in the five sections of the river was constructed by carbon and nitrogen stable isotope techniques. The fish at the top of the food webs were mainly Coreius heterokon, Coreius heterokon and bighead carp in the wet season of Yichang River. The nutrient levels of fish could be divided into three levels: carp, gill and red-eyed trout. The fish in the high trophic position in the Jingzhou reach are the new whitebait of Taihu Lake, the short jawed fish, the yellow tail fish (Xenocypris davidi), the black snake (Channa argus) and the Mandarin fish. The main fish in the high trophic position are the new whitebait, the short jawed fish, the yellow tail fish (Xenocypris davidi), the black snake (Channa argus) and the Mandarin fish. In the dry season, there are 4 nutritional levels in the food web of Chenglingji River during the flood season, and there are 4 nutritional levels in the food web of Chenglingji River, such as Siniperca chuatsi, bighead carp, Pseudorasbora parva, Macropodus ocellatus and Cocklehead bream. In the dry season, the fish in the higher trophic level of the food web are short-jawed squid, wet and southern catfish. The nutrient position of the fish food web in the lake estuary during the flood season can be divided into four levels: warped-billed scorpion, short-jawed squid, long snake locust, southern catfish, mandarin fish and herring fish in the higher trophic level, silver carp, silver carp, grass carp and (?) in the lower trophic level; in the dry season, warped-billed scorpion, snake bream and (?) in the lower trophic level. Hemibarbus maculatus and Hemibarbus labeo had higher trophic levels and silver carp, grass carp and bighead carp were in lower trophic levels in the food web. 3. Based on IsoSource model, the energy sources of 9 main economic fishes (grass carp, silver carp, carp, slave, southern catfish, Mandarin fish, crucian carp, yellow catfish (Pelteobagrus fulvidraco) and their impacts on the middle reaches of the Yangtze River from Yichang to Hukou after the impoundment of the Three Gorges Dam are studied and discussed by using stable isotope technique. The values of 813C and delta 15N of the main economic fishes were - 29.25 (- 3.22) (silver carp) ~ - 24.26 (- 2.8) (gill) and 8.42 (- 1.9) (carp) ~ 11.67 (- 0.9) (mandarin fish). The C/N ratios of the main economic fishes were in the range of 3.26 + 0.12 (silver carp) ~ 4.23 (- 0.9) (yellow catfish). Except crucian carp and yellow catfish, the C/N ratios of the other seven main economic fishes were close to Isource model. Frequencies of energy contribution of four potential carbon sources (suspended particulate organic matter (POM), fixed algae, C3 and C4 plants) to the 9 main economic fishes in the middle reaches of the Yangtze River were found to be mainly from POM and C3 plants. 4. To understand POM space-time of one of the main energy sources of fish food web in the middle reaches of the Yangtze River after the impoundment of the Three Gorges Reservoir. From July 2013 to March 2014, carbon stable isotopes (delta 13 CPOM) and nitrogen stable isotopes (delta 15 NPOM) of suspended particulate organic matter (SOM) in Yichang, Shishou, Chenglingji, Ezhou and Jiujiang sections of the middle reaches of the Yangtze River were studied. The results show that the variation of delta 13 CPOM values in the middle reaches of the Yangtze River is between - 25.21. -19.12% o, 65 There was no significant difference between the other months (p0.001). There was no significant difference between the sampling sites. There was no significant difference between July and September (p0.001). There was no significant difference between the other months. There was significant difference between the sampling sites in Chenglingji and Jiujiang (p0.001). There was no significant difference among the other sampling sites. The results of the binary mixed model show that the POM composition in the middle reaches of the Yangtze River is dominated by terrestrial organic matter with an average contribution rate of 72.8% and obvious seasonal variation. The proportion of terrestrial organic matter is higher in July flood season (81%-92%) and lower in March and December dry season (20%-53%). It is closely related to the runoff of the Yangtze River. The impoundment of the Three Gorges Reservoir and the regulation of flood peak reduction in many reservoirs in the upper reaches of the Yangtze River and the large-scale river slope protection activities in the middle reaches of the Yangtze River have greatly affected the import of exogenous carbon sources such as river source materials, flooding area materials and coastal vegetation. The middle reaches of the Yangtze River may gradually lose their role as large-scale flooding. Typical energy cycle and flow patterns in river ecosystems. 5. Stable isotope analysis techniques have been widely used in the study of nutrient relationships and energy flow in aquatic ecosystems. In fish, white muscles in the back are usually taken after execution for sample analysis, so non-lethal sampling is used instead of muscle tissue for the same purpose. The study compares the ratios of delta 13C to delta 15N in muscle tissues, the ratios of delta 13C to delta 15N in fins of herring, silver carp and silver carp, and the ratios of delta 13C to delta 15N in fins of herring are 0.44 higher than that of muscle and 0.09 higher than that of muscle. The ratio of 813C to muscle was 0.22, and the ratio of delta 15N to muscle was 0.66. For herring, the linear model of the ratio of fin to muscle tissue showed that there was a significant correlation between the ratio of delta 13C to delta 15N in muscle tissue and the ratio of fin to muscle tissue in herring and silver carp (R20.9, p0.001). The stable isotope technique was used to study the trophic level of black carp and silver carp in food web.
【学位授予单位】：西南大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：S931.1
[Abstract]:The main stream of the middle reaches of the Yangtze River is rich in fish resources. It is the main habitat and breeding place for drifting egg-laying fish. The migratory fish (Mylopharyngodon piceus, Ctenopharyngodon idellus, Hypophthalmichys molitrix and Aristichthys nobilis) and the settled fish (Cycarpcarpius, Carassauratus, etc.) The main stream ecosystem of the middle reaches of the Yangtze River is affected by the construction of the Three Gorges Dam and Gezhouba Dam, excessive fishing, barrier between rivers and lakes and water pollution. Fishery resources continue to decline, and aquatic ecosystem service function tends to weaken. By using stable isotope techniques of delta 13C and delta 15N, the nutrient levels, food web structure and energy sources of main fishes, stable isotope characteristics of suspended particulate organic matter (POM) Delta 13C, Delta 15N and fin substitution for white muscle in the aquatic ecosystem of the middle reaches of the Yangtze River were studied. The validity of the study was discussed. The fish food web, energy sources and their potential impacts in the mainstream ecosystem of the middle reaches of the Yangtze River were discussed. The study will be helpful to understand the current status of the fishery ecosystem, the changes and trends of fishery resources in the mainstream ecosystem of the middle reaches of the Yangtze River. The main results are as follows: 1. The nutrient levels of 44 species of fish and 3 species of aquatic invertebrates collected from Yichang, Jingzhou, Shishou, Jianli, Chenglingji, Ezhou, Jiujiang and Hukou sections of the middle reaches of the Yangtze River in March, September, July, September and December 2011 were studied by using stable isotope technique (delta 13C, Delta 15N). The results showed that 813C values of fish in the middle reaches of the Yangtze River ranged from - 33.83 (bighead) to 17.36 (Silurus meridionalis), and 815N values ranged from 4.83 (Misgurnus anguillicaudatus) to 15.13 (Culter alburnus). The mean value of delta N of Bellamya purificata was 5.48% as the baseline line of Trophic Grade (Ying). The nutrient level of aquatic animals in this reach is 2.42-4.88, mainly between 2.83-3.61, the average nutrient level of fish is 3.28, and the number of fish species whose nutrient level is greater than 2.83 accounts for 80.85% of the total number of species. The competition pressure of feeding habits is high, and the niche overlaps. Innsis had the lowest nutrient levels, which were 2.42+0.49 and 2.56+0.52, respectively. The top consumers with nutrient levels greater than 4.0 were Neosalanx taihuensis, Coilia brachygnathus, bighead carp and Saurogobio dumerili, which were 4.88+0.01, 4.37+0.27, 4.32+0.35 and 4.09+0.78, respectively. The nutrient levels of Elopichthys bambusa, Siniperca chuatsi, Snakehead, Qingyu and Southern Catfish were 3.99, 3.92+0.16, 3.89+0.27, 3.87+0.62, 3.59+0.69 and 3.59+0.57.2 respectively. The structure of food webs in the five sections of the river was constructed by carbon and nitrogen stable isotope techniques. The fish at the top of the food webs were mainly Coreius heterokon, Coreius heterokon and bighead carp in the wet season of Yichang River. The nutrient levels of fish could be divided into three levels: carp, gill and red-eyed trout. The fish in the high trophic position in the Jingzhou reach are the new whitebait of Taihu Lake, the short jawed fish, the yellow tail fish (Xenocypris davidi), the black snake (Channa argus) and the Mandarin fish. The main fish in the high trophic position are the new whitebait, the short jawed fish, the yellow tail fish (Xenocypris davidi), the black snake (Channa argus) and the Mandarin fish. In the dry season, there are 4 nutritional levels in the food web of Chenglingji River during the flood season, and there are 4 nutritional levels in the food web of Chenglingji River, such as Siniperca chuatsi, bighead carp, Pseudorasbora parva, Macropodus ocellatus and Cocklehead bream. In the dry season, the fish in the higher trophic level of the food web are short-jawed squid, wet and southern catfish. The nutrient position of the fish food web in the lake estuary during the flood season can be divided into four levels: warped-billed scorpion, short-jawed squid, long snake locust, southern catfish, mandarin fish and herring fish in the higher trophic level, silver carp, silver carp, grass carp and (?) in the lower trophic level; in the dry season, warped-billed scorpion, snake bream and (?) in the lower trophic level. Hemibarbus maculatus and Hemibarbus labeo had higher trophic levels and silver carp, grass carp and bighead carp were in lower trophic levels in the food web. 3. Based on IsoSource model, the energy sources of 9 main economic fishes (grass carp, silver carp, carp, slave, southern catfish, Mandarin fish, crucian carp, yellow catfish (Pelteobagrus fulvidraco) and their impacts on the middle reaches of the Yangtze River from Yichang to Hukou after the impoundment of the Three Gorges Dam are studied and discussed by using stable isotope technique. The values of 813C and delta 15N of the main economic fishes were - 29.25 (- 3.22) (silver carp) ~ - 24.26 (- 2.8) (gill) and 8.42 (- 1.9) (carp) ~ 11.67 (- 0.9) (mandarin fish). The C/N ratios of the main economic fishes were in the range of 3.26 + 0.12 (silver carp) ~ 4.23 (- 0.9) (yellow catfish). Except crucian carp and yellow catfish, the C/N ratios of the other seven main economic fishes were close to Isource model. Frequencies of energy contribution of four potential carbon sources (suspended particulate organic matter (POM), fixed algae, C3 and C4 plants) to the 9 main economic fishes in the middle reaches of the Yangtze River were found to be mainly from POM and C3 plants. 4. To understand POM space-time of one of the main energy sources of fish food web in the middle reaches of the Yangtze River after the impoundment of the Three Gorges Reservoir. From July 2013 to March 2014, carbon stable isotopes (delta 13 CPOM) and nitrogen stable isotopes (delta 15 NPOM) of suspended particulate organic matter (SOM) in Yichang, Shishou, Chenglingji, Ezhou and Jiujiang sections of the middle reaches of the Yangtze River were studied. The results show that the variation of delta 13 CPOM values in the middle reaches of the Yangtze River is between - 25.21. -19.12% o, 65 There was no significant difference between the other months (p0.001). There was no significant difference between the sampling sites. There was no significant difference between July and September (p0.001). There was no significant difference between the other months. There was significant difference between the sampling sites in Chenglingji and Jiujiang (p0.001). There was no significant difference among the other sampling sites. The results of the binary mixed model show that the POM composition in the middle reaches of the Yangtze River is dominated by terrestrial organic matter with an average contribution rate of 72.8% and obvious seasonal variation. The proportion of terrestrial organic matter is higher in July flood season (81%-92%) and lower in March and December dry season (20%-53%). It is closely related to the runoff of the Yangtze River. The impoundment of the Three Gorges Reservoir and the regulation of flood peak reduction in many reservoirs in the upper reaches of the Yangtze River and the large-scale river slope protection activities in the middle reaches of the Yangtze River have greatly affected the import of exogenous carbon sources such as river source materials, flooding area materials and coastal vegetation. The middle reaches of the Yangtze River may gradually lose their role as large-scale flooding. Typical energy cycle and flow patterns in river ecosystems. 5. Stable isotope analysis techniques have been widely used in the study of nutrient relationships and energy flow in aquatic ecosystems. In fish, white muscles in the back are usually taken after execution for sample analysis, so non-lethal sampling is used instead of muscle tissue for the same purpose. The study compares the ratios of delta 13C to delta 15N in muscle tissues, the ratios of delta 13C to delta 15N in fins of herring, silver carp and silver carp, and the ratios of delta 13C to delta 15N in fins of herring are 0.44 higher than that of muscle and 0.09 higher than that of muscle. The ratio of 813C to muscle was 0.22, and the ratio of delta 15N to muscle was 0.66. For herring, the linear model of the ratio of fin to muscle tissue showed that there was a significant correlation between the ratio of delta 13C to delta 15N in muscle tissue and the ratio of fin to muscle tissue in herring and silver carp (R20.9, p0.001). The stable isotope technique was used to study the trophic level of black carp and silver carp in food web.
【学位授予单位】：西南大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：S931.1
【参考文献】
相关期刊论文 前10条
1 刘绍平;陈大庆;段辛斌;邱顺林;黄木桂;;长江中上游四大家鱼资源监测与渔业管理[J];长江流域资源与环境;2004年02期
2 曹文宣;;有关长江流域鱼类资源保护的几个问题[J];长江流域资源与环境;2008年02期
3 陈大庆，邱顺林，黄木桂，刘绍平;长江渔业资源动态监测的研究[J];长江流域资源与环境;1995年04期
4 魏秀国;沈承德;孙彦敏;易惟熙;;珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究[J];沉积学报;2008年01期
5 蔡德陵,李红燕,周卫建,刘卫国,曹蕴宁;无定河流域碳氮稳定同位素研究[J];地球化学;2004年06期
6 柯福恩，，危起伟，罗俊德，杨文华;三峡工程对长江渔业资源的影响与补救措施[J];淡水渔业;1994年01期
7 徐军;张敏;谢平;;氮稳定同位素基准的可变性及对营养级评价的影响[J];湖泊科学;2010年01期
8 林琳;吴敬禄;曾海鳌;刘文;;人类活动对太湖水环境影响的稳定氮同位素示踪[J];湖泊科学;2012年04期
9 范振华;巴家文;段辛斌;;长江宜昌至城陵矶江段鱼类资源现状及物种多样性研究[J];淡水渔业;2012年04期
10 霍堂斌;姜作发;马波;李U
本文编号：2240977
本文链接：https://www.wllwen.com/shoufeilunwen/nykjbs/2240977.html
最近更新
教材专著
