Annales De Limnologie-international Journal of Limnology最新文献

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Phytoplankton functional groups response to environmental parameters in Muling River basin of northeast China 木陵河流域浮游植物功能群对环境参数的响应
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/limn/2019014
Xu Sun, P. C. Mwagona, I. E. Shabani, Wen-jie Hou, Xiaoyu Li, F. Zhao, Qing Chen, Yuxi Zhao, Di Liu, Xingchun Li, Chengxue Ma, Hongxian Yu
{"title":"Phytoplankton functional groups response to environmental parameters in Muling River basin of northeast China","authors":"Xu Sun, P. C. Mwagona, I. E. Shabani, Wen-jie Hou, Xiaoyu Li, F. Zhao, Qing Chen, Yuxi Zhao, Di Liu, Xingchun Li, Chengxue Ma, Hongxian Yu","doi":"10.1051/limn/2019014","DOIUrl":"https://doi.org/10.1051/limn/2019014","url":null,"abstract":"The present study was carried out in the biggest tributary of Ussuri River of boundary between China and Russia. The Muling River basin has undergone a long-term dredging works, and waterbody became seriously turbid. The succession of phytoplankton functional groups succession and environmental factors in the river were sampled in 2015. We totally identified 83 species, belonging to 17 functional groups which 5 were predominant, including group F, M, MP, P and Y. The seasonal succession of phytoplankton functional groups was M/P-F/MP/P-MP/P. Results of Spearman correlation analysis and canonical correspondence analysis (CCA) revealed that phytoplankton functional groups were mainly influenced by nutrient concentrations and light availability including total nitrogen (TN), ammonium nitrogen (NH4+–N), nitrate nitrogen (NO3−–N), N:P ratio (N:P), water depth (D) and transparency (SD) in the basin.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"10 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87724429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Origin, diversity and distribution of freshwater epigean amphipods in Maghreb 马格里布淡水表层片脚类动物的起源、多样性和分布
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/LIMN/2019012
Khaoula Ayati, Ramzi Hadjab, Hichem Khammar, S. Dhaouadi, C. Piscart, E. Mahmoudi
{"title":"Origin, diversity and distribution of freshwater epigean amphipods in Maghreb","authors":"Khaoula Ayati, Ramzi Hadjab, Hichem Khammar, S. Dhaouadi, C. Piscart, E. Mahmoudi","doi":"10.1051/LIMN/2019012","DOIUrl":"https://doi.org/10.1051/LIMN/2019012","url":null,"abstract":"Northern Africa, although one of the world hotpots of biodiversity, is poorly studied and the freshwater fauna living in this part of the world remains partly unknown. This study focused on the diversity and distribution of the poorly known epigean freshwater amphipods. We performed an exhaustive analysis of the literature on this group of crustaceans and sampled 106 additional localities from the eastern part of Algeria and in Tunisia. Our results showed an important diversity with 25 species (including the presence of at least three new undescribed species) and a very high rate of endemism with 52% of species occurring at on only 1 or 2 sites. We also highlighted a very low diversity on each site with only 4.4% of sites harboring more than 1 species. The comparative distribution of certain species between Europe and Maghreb and also between the western and eastern part of Northern Africa allow us to discuss some hypotheses about the factors underlying this endemism and the biogeographical origin of species. However, our study revealed a general lack of knowledge in the region, especially in the South of Morocco and Algeria. Hence, more information would be needed to propose adapted conservation strategies of freshwater fauna in Maghreb.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"63 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79229217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Crustacean zooplankton community in relation to physicochemical factors and phytoplankton of 13 waterbodies located in the Yangtze River delta 长江三角洲13个水体甲壳类浮游动物群落与理化因子及浮游植物的关系
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/LIMN/2019016
Wenzhi Wei, Hang Zhuang, Yingying Zhang, Liufu Wang
{"title":"Crustacean zooplankton community in relation to physicochemical factors and phytoplankton of 13 waterbodies located in the Yangtze River delta","authors":"Wenzhi Wei, Hang Zhuang, Yingying Zhang, Liufu Wang","doi":"10.1051/LIMN/2019016","DOIUrl":"https://doi.org/10.1051/LIMN/2019016","url":null,"abstract":"The relationship between crustacean zooplankton community and environmental factors remains a hot topic in eutrophication bio-monitoring subject. Most water bodies in the Yangtze River delta are mesotrophic/eutrophic, which has attracted much attention from ecologists. Nevertheless, previous studies on crustacean zooplankton community in this region only focused on their relation to physicochemical factors excluding phytoplankton. In this study, the crustacean zooplankton abundance and environmental factors (physicochemical factors and phytoplankton abundance) were investigated in Spring, Summer, Autumn and Winter in 13 waterbodies (8 lakes and 5 reservoirs) located in the Yangtze River delta. Results showed that NO2−–N and TN in Spring, SD and TP in Summer had significant difference (P < 0.05) between 8 lakes and 5 reservoirs. That may be related to microbial communities and macrophytes. All 13 studied water bodies were dominated by cyanophyta, whose Microcystis may determine the dominance of Bosmina fatalis. Moreover, eutrophic level should be in relation to the significant difference of plankton between 8 lakes and 5 reservoirs. Finally, five factors (cyanophyta, SD, WT, pH and DO) were significantly correlated with crustacean zooplankton abundance. That indicated the metabolism, reproduction, development and competitors of crustacean zooplankton were affected by these five factors. This research provided basic data of the 13 water bodies and studied the relationship between zooplankton and physicochemical factors as well as phytoplankton, providing scientific basis for the monitoring of eutrophic waterbodies located in the Yangtze river delta.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"2 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74040216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Slow degradation of compostable plastic carrier bags in a stream and its riparian area 可堆肥塑料袋在溪流及其沿岸地区的缓慢降解
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/limn/2019017
Maxime Artru, A. Lecerf
{"title":"Slow degradation of compostable plastic carrier bags in a stream and its riparian area","authors":"Maxime Artru, A. Lecerf","doi":"10.1051/limn/2019017","DOIUrl":"https://doi.org/10.1051/limn/2019017","url":null,"abstract":"There is no place on Earth where plastic debris could not be found. Impacts of plastics on aesthetics, biota and ecosystems are dependent on how long plastic items last, and what degradation products are released, in recipient environments. As bio-based plastics tend to replace petroleum-based plastics in everyday life, it is important to upgrade knowledge on the degradation of new polymers in natural environments. Single-use plastic carrier bags are nowadays made of bio-plastics certified as biodegradable and compostable. It is unclear, however, whether claims of biodegradability and compostability can be taken as evidence of rapid degradation of plastic bags outside recycling/composting facilities. This study sought to provide quantified information about the degradation of compostable plastic carrier bags in streams and riparian zones. We found that plastic samples enclosed in different types of mesh bags lost weight at extremely slow rates, albeit significant when submerged in a stream. 95% of initial plastic mass remained after 77 days spent in water whereas alder leaf litter allowed to decompose under the same condition had completely disappeared before the end of the study. Determination of respiration rate and invertebrate abundance in plastic samples showed a greater decomposer activity in the stream than in the riparian environment. However, biotically-mediated degradation by decomposers was probably overridden by dissolution processes in mediating plastic mass loss. Our findings suggest that mismanaged plastic carrier bags could impact recipient ecosystems even when they are claimed as biodegradable or compostable.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"86 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89346809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Relative effects of elevational and habitat constraints on alpine spring biodiversity 海拔和生境限制对高寒春季生物多样性的相对影响
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/limn/2019021
C. Claret, P. Marmonier
{"title":"Relative effects of elevational and habitat constraints on alpine spring biodiversity","authors":"C. Claret, P. Marmonier","doi":"10.1051/limn/2019021","DOIUrl":"https://doi.org/10.1051/limn/2019021","url":null,"abstract":"Global climatic changes and local disturbances may alter composition and distribution of spring invertebrates in mountains. In this study, we compared the effects of elevation, landscape and local characteristics on spring biodiversity. At 16 springs (from 570 to 1650 m a.s.l.) in The Chartreuse Range (French Alps) benthic, vegetation, and interstitial habitats were sampled in summer for aquatic invertebrate assemblage structure (abundances, richness, reproduction and dispersal traits, functional feeding groups). Assemblages were related to geographic location (elevation), landscape characteristics and local variables. Elevation was the major driver of the fauna: taxonomic richness and the percentage of scrapers decreased with elevation, while the proportion of predators and species with an asexual reproduction increased with elevation. The landscape characteristics around the spring had a weak influence on the benthic taxonomic richness which increased with the percentage of forest and decreased with the proportion of grassland. Finally, the habitat characteristics had no effect on taxonomic richness, but partially control the abundances of benthic assemblages and sediment-feeder organisms that both decreased with increasing sediment grain size. Current and future changes in the temperature patterns would affect alpine spring fauna, but disturbance of the local characteristics of springs must not be neglected.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"129 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83030880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of herbicide mixtures on freshwater microalgae with the potential effect of a safener 混合除草剂对具有潜在安全效应的淡水微藻的影响
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/LIMN/2019002
O. Chamsi, E. Pinelli, Bruno Faucon, Annie Perrault, L. Lacroix, J. Sánchez-Pérez, J. Charcosset
{"title":"Effects of herbicide mixtures on freshwater microalgae with the potential effect of a safener","authors":"O. Chamsi, E. Pinelli, Bruno Faucon, Annie Perrault, L. Lacroix, J. Sánchez-Pérez, J. Charcosset","doi":"10.1051/LIMN/2019002","DOIUrl":"https://doi.org/10.1051/LIMN/2019002","url":null,"abstract":"Freshwater microalgae are primary producers and cosmopolitan species subjected to the effects of herbicides. In this work, the in vitro algal growth inhibitory effects of 11 agrochemicals (9 herbicides, 1 metabolite, and 1 safener) were quantified. Chemical compounds were applied singly and in specific mixtures. Three species were used in axenic condition: the green alga Desmodesmus subspicatus (Chodat), the diatoms Nitzschia palea (Kützing) W. Smith and Navicula pelliculosa (Kützing) Hilse. When exposed to single compounds, N. palea and N. pelliculosa were only sensitive to atrazine/desethylatrazine and the safener benoxacor (BE), respectively. D. subspicatus was equally sensitive to four herbicides including atrazine and its metabolite and significantly more sensitive to iodosulfuron-methyl-sodium (IODO). The mixture of these five compounds induced a significantly higher growth inhibition of about 1.5-fold than IODO alone, which could be attributed to the four other herbicides. The mixture of all compounds was twofold less toxic than IODO on D. subspicatus. A halogen atom is present in IODO as in the herbicides to which the safener BE − known to induce glutathione-S-transferases − is associated in agrochemical preparations. We then showed that IODO was less toxic when combined with non-toxic concentrations of BE. These results indicated that the toxicity of the most active herbicide studied was decreased by a non-herbicide compound present in agrochemical formulations of other herbicides. These results suggest the importance to take into account the chemistry and the mechanisms of action for each compound in a risk assessment approach of a complex mixture.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"47 3 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87688651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Effects of mixing intensity on colony size and growth of Microcystis aeruginosa 混合强度对铜绿微囊藻菌落大小和生长的影响
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/LIMN/2019011
Chunni Zhong, Guijun Yang, Boqiang Qin, S. Wilhelm, Liu Yu, Han Lihua, Rui Zheng, Hongwei Yang, Zhang Zhou
{"title":"Effects of mixing intensity on colony size and growth of Microcystis aeruginosa","authors":"Chunni Zhong, Guijun Yang, Boqiang Qin, S. Wilhelm, Liu Yu, Han Lihua, Rui Zheng, Hongwei Yang, Zhang Zhou","doi":"10.1051/LIMN/2019011","DOIUrl":"https://doi.org/10.1051/LIMN/2019011","url":null,"abstract":"Mixing is an integral environmental factor that affects lake ecosystems. For the cyanobacterium Microcystis, colony size is important with respects to migration velocity, how cells respond to grazing pressure, light attenuation, nutrient uptake and growth. To understand how mixing shapes colony size and the growth of Microcystis, we measured the effects of different current velocities (0, 0.16, 0.32, 0.64, and 1.28 m s−1) on M. aeruginosa in Lake Taihu. After 24 h of continuous mixing, the mean colony sizes of M. aeruginosa in the controls, 0.16, 0.32, 0.64, and 1.28 m s−1 groups were 23.6, 50.1, 92.9, 67.8, and 37.3 μm, respectively. Colony sizes of M. aeruginosa in all treatment groups were significantly larger than those in controls. As well, the concentration of soluble extracellular polysaccharide and bound extracellular polysaccharides of M. aeruginosa in all treatment groups were significantly higher than those in controls. Except for the highest level of mixing (1.28 m s−1), the growth rate of M. aeruginosa was significantly higher than that in controls. This study suggested that mixing intensity over short time periods can significantly influence colony size and the growth of M. aeruginosa.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"9 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81090022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Growth and morphological responses of Chlorella vulgaris at different initial algal densities to treatment with Ceratophyllum demersum methanol extracts 不同初始藻密度下普通小球藻生长及形态对角藻甲醇提取物的响应
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/LIMN/2019015
Jing Dong, Mengyang Chang, Chenlu Li, Dujuan Dai
{"title":"Growth and morphological responses of Chlorella vulgaris at different initial algal densities to treatment with Ceratophyllum demersum methanol extracts","authors":"Jing Dong, Mengyang Chang, Chenlu Li, Dujuan Dai","doi":"10.1051/LIMN/2019015","DOIUrl":"https://doi.org/10.1051/LIMN/2019015","url":null,"abstract":"The allelopathically inhibitory effects of submerged macrophytes on phytoplankton have been extensively studied and are utilised as an effective strategy for water restoration. However, this technique has been minimally implemented in natural in situ water bodies because of the unclear and complex interactions involved. Our study considered the uneven density distribution of algae in natural aquatic ecosystems and the biomass-dependent effects of submerged macrophytes on target algae. Ceratophyllum demersum methanol extracts of gradient concentration on Chlorella vulgaris with different initial algal density were conducted in the present laboratory study. Results indicated that methanol extracts of C. demersum could not only inhibit the growth of but also promote colony formation of C. vulgaris. C. vulgaris of a low density exerted increased inhibition and colony proportion responses to C. demersum extracts. By 0.42 g/mL C. demersum treatment, the inhibition rate on C. vulgaris under 0.02 IAD (Initial Alagal Density) and 0.05 IAD (p < 0.05) was 88.7%, 70.9%, respectively. We also suggested that the effects of C. demersum were biomass dependent, such that extracts with high concentration could produce increased inhibitory effects on C. vulgaris. According to GC-MS analysis, the study revealed five potential compounds (i.e. hexanoic, acetoacetic, azelaic, palmitic and stearic acid) in the C. demersum methanol extracts. However, the individual or combined effects of those compounds require further exploration. This study proposed certain theoretical basis for future water restoration by submerged macrophytes, that the biomass of the macrophytes and the density of the algae should both be taken into account.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"46 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80348654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Movement patterns of juvenile and adult noble crayfish (Astacus astacus) in a small stream, determined by radiotelemetry 小龙虾(Astacus Astacus)幼虾和成年小龙虾(Astacus Astacus)在小溪中的运动模式
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/limn/2019018
T. Danek, J. Musil, Petr Vlašánek, J. Svobodová, Tereza Barteková, David Štrunc, Miroslav Barankiewicz, E. Bouše, E. Svobodová, S. Johnsen, Oddgeir Andersen
{"title":"Movement patterns of juvenile and adult noble crayfish (Astacus astacus) in a small stream, determined by radiotelemetry","authors":"T. Danek, J. Musil, Petr Vlašánek, J. Svobodová, Tereza Barteková, David Štrunc, Miroslav Barankiewicz, E. Bouše, E. Svobodová, S. Johnsen, Oddgeir Andersen","doi":"10.1051/limn/2019018","DOIUrl":"https://doi.org/10.1051/limn/2019018","url":null,"abstract":"This article reports on the results of the first radiotelemetric field study comparing the movement patterns of juvenile and adult noble crayfish (Astacus astacus) over the 24-h cycle. During our study (in summer, outside the reproduction period), juveniles moved over significantly longer distances than adults; upstream movements prevailed in both groups. The longest distance covered by an individual crayfish during a three-hour interval was 110 m (in the upstream direction). Adults moved most frequently at dusk and least frequently during daytime. Among juveniles, the likelihood of movement did not significantly differ between the times of day; however, distances covered by juveniles were the longest at night and significantly shorter during daytime and at dusk. Juveniles and adults exhibited very similar local activity (motion within a single place) with high values at night and low values during daytime.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"12 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84964069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Competition between Brachionus calyciflorus and Brachionus angularis (Rotifera) in relation to algal food level and initial population density 萼花臂尾轮虫与角臂尾轮虫的竞争与藻类食物水平和初始种群密度的关系
IF 1 4区 环境科学与生态学
Annales De Limnologie-international Journal of Limnology Pub Date : 2019-01-01 DOI: 10.1051/LIMN/2019001
Kun Zhang, Quan Wan, Y. Xi
{"title":"Competition between Brachionus calyciflorus and Brachionus angularis (Rotifera) in relation to algal food level and initial population density","authors":"Kun Zhang, Quan Wan, Y. Xi","doi":"10.1051/LIMN/2019001","DOIUrl":"https://doi.org/10.1051/LIMN/2019001","url":null,"abstract":"Intensive interspecific competition for limited resource often can result in the exclusion of inferior competitors, decrease the species diversity and alter the structure of the zooplankton community. Competitive experiments between Brachionus calyciflorus and Brachionus angularis were conducted at three Scenedesmus densities (0.5 × 106, 1.0 × 106 and 2.0 × 106 cells ml−1) and four initial inoculation densities (numerically, 100% B. calyciflorus, 75% B. calyciflorus and 25% B. angularis, 50% each of the two species, 25% B. calyciflorus and 75% B. angularis, and 100% B. angularis). The results showed that at the low food level, B. angularis outcompeted B. calyciflorus and vice versa at the high food levels. At the intermediate food level, B. angularis was displaced by B. calyciflorus at nearly all the initial inoculation densities except for 75% B. angularis, at which both species coexisted until the termination of the experiment. When grown alone at 0.5 × 106, 1.0 × 106 and 2.0 × 106 cells ml−1 of Scenedesmus, B. calyciflorus reached the peak abundance values of 34 ± 4, 69 ± 5 and 101 ± 9 individuals ml−1 and had population growth rates of 0.608 ± 0.032, 0.654 ± 0.033 and 0.518 ± 0.039 d−1, respectively. The corresponding values for B. angularis were 265 ± 8, 330 ± 30 and 802 ± 87 individuals ml−1 and 0.623 ± 0.020, 0.770 ± 0.036 and 0.871 ± 0.013 d−1. The results suggest that the outcome of competition depends not only on the size of the competing species and food availability but also on their colonizing density.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"11 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87657062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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