At present, with the transformation and improvement of water environment management goals from water chemical quality to ecological quality (chemical, physical and biological comprehensive quality), it is urgent to establish a scientific method to select suitable benthic animals. Fit the characteristics of the river and create a biological reference point. The purpose of this paper is to investigate benthic animals through the phytoplankton index method and establish a biological benchmark. Correlation analysis was carried out on biological abundance and environmental factors, and the corresponding correlation coefficients were obtained. Multiple linear regression analysis was carried out on environmental factors and index groups. Different classification index groups had different interpretations of environmental variables. Among them, the highest correlation coefficient is 0.689, and its environmental factors include: pebble%, sand%, SS, urban area, and the second combination of environmental factors is pebble%, sand%, SS, DO, and the correlation coefficient is 0.631. These two sets of environmental factors had the greatest impact on species richness.

Suana Ahmmad. Benthic Animals and Establishment of Biological Benchmarks Based on Phytoplankton Biological Index Method. Academic Journal of Environmental Biology (2020), Vol. 1, Issue 1: 44-52. https://doi.org/10.38007/AJEB.2020.010106.

[1] Barker L K, Giska J R, Radniecki T S, et al. Effects of short- and long-term exposure of silver nanoparticles and silver ions to Nitrosomonas europaea biofilms and planktonic cells.. Chemosphere, 2018, 206(SEP.):606-614.

[2] Yamamoto T, Kagohara T, Yamamoto K, et al. Distribution of Batillaria multiformis and B. attramentaria (Batillariidae) in Southern Kyushu. Plankton & Benthos Research, 2018, 13(1):10-16. https://doi.org/10.3800/pbr.13.10

[3] Powell E N, Mann R, Kuykendall K M, et al. The intermingling of benthic macroinvertebrate communities during a period of shifting range: The 'East of Nantucket' Atlantic Surfclam Survey and the existence of transient multiple stable states. Marine ecology, 2019, 40(4):e12546.1-e12546.17. https://doi.org/10.1111/maec.12546

[4] Eea B, Ana B, Kt C, et al. Benthic-pelagic coupling in coastal seas – Modelling macrofaunal biomass and carbon processing in response to organic matter supply. Journal of Marine Systems, 2019, 196(C):36-47.

[5] Rands P V, MD Domenico, Herranz M, et al. Population genetic structure of the intertidal kinorhynch Echinoderes marthae (Kinorhyncha; Cyclorhagida; Echinoderidae) across the São Sebastião Channel, Brazil. Proceedings of the Biological Society of Washington, 2018, 131(1):36-46. https://doi.org/10.2988/17-00005

[6] Boonkusol D, Junshum P, Panprommin K . Gonadosomatic Index, Oocyte Development and Fecundity of the Snakehead Fish (Channa striata) in Natural River of Mae La, Singburi Province, Thailand. Pakistan Journal of Biological Sciences, 2019, 23(1):1-8. https://doi.org/10.3923/pjbs.2020.1.8

[7] Comelli A, Stefano A, Russo G, et al. K-nearest neighbor driving active contours to delineate biological tumor volumes. Engineering Applications of Artificial Intelligence, 2019, 81(MAY):133-144.

[8] Chernomyrdin N V, Kucheryavenko A S, Kolontaeva G S, et al. Reflection-mode continuous-wave 0.15λ-resolution terahertz solid immersion microscopy of soft biological tissues. Applied Physics Letters, 2018, 113(11):111102.1-111102.4. https://doi.org/10.1063/1.5045480

[9] Carey C C, Mcclure R P, Doubek J P, et al. Chaoborus spp. Transport CH_4 from the Sediments to the Surface Waters of a Eutrophic Reservoir, But Their Contribution to Water Column CH_4 Concentrations and Diffusive Efflux Is Minor. Environmental Science & Technology, 2018, 52(3):1165-1173.

[10] Baliarsingh S K, Srichandan S, Lotliker A A, et al. Zooplankton Distribution in Coastal Water off Gopalpur, North-Western Bay of Bengal. Journal of Ocean University of China, 2018, 17(004):879-889. https://doi.org/10.1007/s11802-018-3414-0

[11] Shakouri A, Gheytasi H . Bioaccumulation of heavy metals in oyster (Saccostrea cucullata) from Chabahar bay coast in Oman Sea: Regional, seasonal and size-dependent variations. Marine Pollution Bulletin, 2018, 126(JAN.):323-329.

[12] Soto Cardenas C, Gerea M, Queimalinos C, et al. Inorganic mercury (Hg 2+ ) accumulation in autotrophic and mixotrophic planktonic protists: Implications for Hg trophodynamics in ultraoligotrophic Andean Patagonian lakes. Chemosphere, 2018, 199(MAY):223-231.

[13] Ramil A, Vazquez-Nion D, Pozo-Antonio J S, et al. Using Hyperspectral Imaging to Quantify Phototrophic Biofilms on Granite. Journal of environment informatics, 2020, 35(1):34-44.

[14] Rix L, Ribes M, Coma R, et al. Heterotrophy in the earliest gut: a single-cell view of heterotrophic carbon and nitrogen assimilation in sponge-microbe symbioses. The ISME Journal, 2020, 14(10):1-14. https://doi.org/10.1038/s41396-020-0706-3

[15] Moore A M, Yasir I, Ambo-Rappe R, et al. Microhabitat preference of the Banggai Cardinalfish (Pterapogon kauderni): a behavioural experimental approach. IOP Conference Series Earth and Environmental Science, 2020, 564(12019):1-10.

[16] Melody S, Williams G A . Factors affecting the frequency and outcome of platypus entanglement by human rubbish. Australian Mammalogy Aust. Mammal. 2020, 44(1):81-86. https://doi.org/10.1071/AM21004

[17] Tulsankar S S, Cole A J, Gagnon M M, et al. Temporal variations and pond age effect on plankton communities in semi-intensive freshwater marron (Cherax cainii, Austin and Ryan, 2002) earthen aquaculture ponds in Western Australia - ScienceDirect. Saudi Journal of Biological Sciences, 2020, 28( 2):1392-1400. https://doi.org/10.1016/j.sjbs.2020.11.075

[18] David V, Tortajada S, Philippine O, et al. Ecological succession and resilience of plankton recovering from an acute disturbance in freshwater marshes. The Science of the Total Environment, 2020, 709(Mar.20):135997.1-135997.11.

[19] Craddock P R, Haecker A, Bake K D, et al. Universal Curves Describing the Chemical and Physical Evolution of Type II Kerogen during Thermal Maturation. Energy & Fuels, 2020, 34(12):15217-15233.

[20] Bondarenko N A, Vorobyova S S, Zhuchenko N A, et al. Current state of phytoplankton in the littoral area of Lake Baikal, spring 2017. Journal of Great Lakes Research, 2020, 46( 1):17-28. https://doi.org/10.1016/j.jglr.2019.10.001