planktonic vs benthic
Article An environmental gradient of vegetative controls upon channel planform in the source region of the Yangtze and Yellow Rivers. Geomorphology. 2016;113:E1516–25. In the Yangtze River, diatoms mainly consisted of Coscinodiscophyceae, Fragilariophyceae, Bacillariophyceae, and Mediophycea. Genome Biol. Graf WL. Kunz et al  reported that sediment, carbon, nitrogen, and phosphorus were trapped by the reservoir immediately upstream of the Itezhi-Tezhi Dam, increasing the N:P ratio downstream of the dam. In view of their relative abundance, planktonic diatoms were characterized by Psammothidium, Nitzschia, and Cymbella for steep slope environments, Papiliocellulus for moderate slope, Mayamaea, Pinnularia, and Surirella for mild slope environments. A total of 24 sampling stations and around 5,700 specimens of foraminifera were recognized on thin-section analysis and classified into two major categories: planktonic and benthic. In the present study, specific diatoms were identified as preferring to different levels of light intensity (Fig. In the Yangtze River, the planktonic diatoms such as Asterionella formosa, Diatoma vulgare, Lindavia viaradiosa, Gomphonema pumilum, and Thalassiosira nordenskioeldii were significantly strongly associated with dissolved carbon dioxide (pCO2, see the “Methods” section) (Spearman r > 0.3, P < 0.05), while the benthic diatoms Asterionella formosa, Encyonema prostratum, Eucocconeis laevis, Fistulifera saprophila, and Nitzschia sigmoidea were highly correlated with pCO2 (Additional file 1: Figure S7). 2018;442:66–78. For example, Liu et al. 3), indicating that diatoms possess diverse light-regulatory mechanisms and adaptive responses . Over the 6030 km continuum from river source to mouth, landform played a significant role in spatial differentiation of both planktonic and benthic diatom communities. Effects of connectivity, dispersal directionality and functional traits on the metacommunity structure of river benthic diatoms. a Two hundred seventy-nine water and sediment samples at 62 hydrologic stations in the Yangtze River covering the actual sinuous channel reach of length 6030 km (equivalent to 1.83 times the 3290 km straight line from start to end sampling sites). Berthon V, Bouchez A, Rimet F. Using diatom life-forms and ecological guilds to assess organic pollution and trophic level in rivers: a case study of rivers in south-eastern France. ANOSIM statistics concerning differences in diatom communities within and between sample types. The life of diatoms in the world’s oceans. Limnol Oceanogr. Wang, J., Liu, Q., Zhao, X. et al. Gray lines denote ordinary least squares linear regression fits across all samples. For example, Centis et al. Table S2. The Yangtze River is the longest river situated wholly in Asia and the third longest in the world, with a drainage basin of 1.8 million km2. . College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing, 100871, China, Jiawen Wang, Qingxiang Liu, Yuxin Liu & Qian Chen, Institute of Hydroecology, Ministry of Water Resources, Chinese Academy of Sciences, Wuhan, 430079, China, Institute of Infrastructure and Environment, School of Engineering, University of Edinburgh, The King’s Buildings, Edinburgh, EH9 3JL, UK, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing, 100871, China, You can also search for this author in Arai H, Fukushima T. Impacts of long-term increase in silicon concentration on diatom blooms in Lake Kasumigaura, Japan. . Dalu T, Wasserman RJ, Magoro ML, Mwedzi T, Froneman PW, Weyl OLF. 2012;117:G02007. Meanwhile, environmental drivers of diatom communities were interpreted in terms of photosynthetic active radiation, temperature, channel slope, and nutrient conditions under varying landforms. Dynamics of Lotic Ecosystems. In riverine ecosystems, both planktonic and benthic algae are the important components of primary producers. We need money to operate the site, and almost all of it comes from our online advertising.
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