Anderson MJ, Gorley RN, Clarke KR (2008) PERMANOVA+ for PRIMER Guide to software and Statistical Methods. Plymouth: PRIMER-E Ltd.
APHA (1992) Standard Methods for Examination of Water and Waste Water, eighteenth ed. American Public Health Association, Washington, DC.
Abdullah Al M, Gao Y, Xu G, Wang Z, Warren A, Xu H (2018) Trophic functional patterns of biofilm-dwelling ciliates at different water depths in coastal waters of the Yellow Sea, northern China. Eur. J. Protistol. 63: 34–43.
Clarke KR, Gorley RN (2006) User manual/tutorial. Plymouth: PRIMER-E Ltd.
Clarke KR, Gorley RN (2015) PRIMER v7: User Manual/Tutorial. PRIMER-E Ltd, Plymouth, UK.
Cairns Jr J, Henebry MS (1982) Interactive and non-interactive protozoa colonization process. In: Cairns Jr J, editor. Artificial substrates. Ann Arbor, MI: Ann Arbor Science Publishers; p. 23–70.
Cairns Jr J, Lanza GR, Parker BC (1972) Pollution related to structural and functional changes in aquatic communities with emphasis on freshwater algae and protozoa. Proc. Acad. Nat. Sci. Phila. 124: 79–127.
Coppellotti O, Matarazzo P (2000) Ciliate colonization of artificial substrates in the Lagoon of Venice. J. Mar. Biol. Ass. U.K. 80 (3): 419–427.
Corliss JO (2002) Biodiversity and biocomplexity of the protists and an overview of their significant roles in maintenance of our biosphere. Acta Protozool. 41 (3): 199–219.
Eisenmann H, Letsiou I, Feuchtinger A, et al (2001) Interception of small particles flocculent structures, sessile ciliates and the basic layer of wastewater biofilm. Appl. Environ. Micro. 67: 4286–4292.
Ellis D (1995) Taxonomic sufficiency in pollution assessment. Mar. Pollut. Bull. 16: 459.
Finlay BJ, Esteban GF (1998) Freshwater protozoa: biodiversity and ecological function. Biodiver. Conserv. 7: 1163–1186.
Fenchel T (1969) The ecology of marine microbenthos. IV. Structure and function of the benthic ecosystem, its chemical and physical factors and the microfauna communities with special reference to the ciliated protozoa. Ophelia 6: 1–182.
Fernandez-Leborans G, Fernandez-Fernandez D (2002) Protist functional groups in a sublittoral estuarine epibenthic area. Estuaries 25: 382–392.
Fischer H, Sachse A, Steinberg CEW, Pusch M (2002) Differential retention and utilization of dissolved organic carbon by bacteria in river sediments. Limnol. Oceano. 47: 1702–1711.
Guo C, Bai X, Abdullah Al M, Sikder MNA, Xu H (2019) Determining water depths for monitoring coastal water quality using multiple functional traits of periphytic protozoa in marine ecosystems. Ocea. Sci. J. 54: 87–95.
Heino J, Soininen J (2007) Are higher taxa adequate surrogates for species-level assemblage patterns and species richness in stream organisms? Biol. Conserv. 137 (1): 78–89.
Huston MA (1979) A general hypothesis of species diversity. Am. Nat. 113, 81–101.
Heymans, J.J., Coll, M., Libralato, S., Morissette, L., Christensen, V., 2014. Global Patterns in Ecological Indicators of Marine Food Webs: A Modelling Approach. PLoS ONE 9 (4): e95845.
Hunter Jr M, Westgate M, Barton P, Calhoun A, Pierson J, Tulloch A, Beger M, Branquinho C, Caro T, Gross J, Heino J, Lane P, Longo C, Martin K, McDowell WH, Mellin C, Salo H, Lindenmayer D (2016) Two roles for ecological surrogacy: Indicator surrogates and management surrogates. Ecol. Indic. 63: 121–125.
Ismael AA, Dorgham MM (2003) Ecological indices as a tool for assessing pollution in El-Dekhaila Harbour (Alexandria, Egypt). Oceanology 45: 121–131.
Jiang J, Wu S, Shen Y (2007) Effects of seasonal succession and water pollution on the protozoan community structure in an eutrophic lake. Chemosphere, 66 (3): 523–32.
Jiang Y, Xu H, Hu X, Zhu M, Al-Rasheid KAS, Warren A (2011) An approach to analyzing spatial patterns of planktonic ciliate communities for monitoring water quality in Jiaozhou Bay, northern China. Mar. Pollut. Bull. 62 (2): 227–35.
Jiang Y, Xu H, Zhang W, Zhu M, Al-Rasheid KAS (2012) Can body-size patterns of ciliated zooplankton be used for assessing marine water quality? A case study on bioassessment in Jiaozhou Bay, northern Yellow Sea. Environ. Sci. Pollut. Res. 19: 1747–1754.
Jiang Y, Xu H, Hu X, Warren A, Song W (2013a) Functional groups of marine ciliated protozoa and their relationships to water quality. Environ. Sci. Pollut. Res. 20: 5272–80.
Jiang Y, Yang EJ, Min JO, Kang SH, Lee SH (2013b) Using pelagic ciliated microzooplankton communities as an indicator for monitoring environmental condition under impact of summer sea-ice reduction in western Arctic Ocean. Ecol. Indic. 34: 380–390.
Jiang Y, Xu H, Warren A (2014a) Insights into discriminating environmental quality status based on a simplified taxonomic pool of ciliated protozoa in marine ecosystems. Sci. Total Environ. 468–469: 663–670.
Kathol M, Norf H, Arndt H, Weitere M (2009) Effects of temperature increase on the grazing of planktonic bacteria by biofilm-dwelling consumers. Aquat. Microb. Ecol. 55: 65–79.
Kazmi SSUH, Xuexi T, Xu G, Sikder MNA, Xu H (2020a) Vertical variability in taxonomic breadth of biofilm-dwelling ciliates in marine bioassessment surveys. Reg. Stud. Mar. Sci. 38: 101366.
Kamenir Y, Dubinsky Z, Harris R (2010) Taxonomic size structure consistency of English Channel phytoplankton. J. Exp. Mar. Biol. Ecol. 383 (2): 105–110.
Kerr SR, Dickie LM (2001) The biomass spectrum. New York, NY: Columbia University Press.
Kralj K, Plenkovic´-Moraj Gligora M, Primc-Habdija B, et al (2006) Structure of periphytic community on artificial substrata: influence of depth, slide orientation and colonization time in karstic Lake Visovacko, Croatia. Hydrobiologia 560: 249–258.
Magurran AE (1991) Ecological diversity and its measurement. London: Chapman and Hall.
Norf H, Arndt H, Weitere M (2007) Impact of local temperature increase on the early development of biofilm-associated ciliate communities. Oecologia, 151: 341–350.
Norf H, Arndt H, Weitere M (2009) Effects of resource supplements on mature ciliate biofilms: an empirical test using a new type of flow cell. Biofouling 25: 769–778.
Pratt J, Cairns Jr J (1985) Functional groups in the Protozoa: roles in differing ecosystems. J. Protozool. 32: 415–423.
Parry JD (2004) Protozoan grazing of freshwater biofilms. Adv. Appl. Microbiol. 57: 167–196.
Railkin AI (1998) The pattern of recovery of disturbed microbial communities inhabiting hard substrates. Hydrobiologia 385: 47–57.
Risse-Buhl U, Kusel K (2009) Colonization dynamics of biofilm-associated ciliate morphotypes at different flow velocities. Europ. J. Parasitol. 45 (1): 64–76.
Shi X, Liu X, Liu G, Sun Z, Xu H (2012) An approach to analyze spatial patterns of protozoan communities for assessing water quality in the Hangzhou section of Jinghang Grant Canal in China. Environ. Sci. Pollut. Res. 19: 739–47.
Sheldon RW, Prakash A, Sutcliffe WH (1972) The size distribution of particles in ocean. Limnol. Oceanogr. 17 (3): 327–340.
Struder-Kypke MC (1999) Periphyton and sephagnicolous protists of dystrophic bog lakes (Brandenburg, Germany) I. Annual cycles, distribution and comparison to other lakes. Limnologica 29: 393–406.
Sikder MNA, Bai X, Warren A, Xu H (2019b) An approach to determining homogeneity in taxonomic breadth of periphytic ciliate communities in colonization surveys for bioassessment. Ecol. Indic. 107: 105671.
San Martin E, Harris RP, Irigoien X (2006) Latitudinal variation in plankton size spectra in the Atlantic Ocean. Deep-Sea Res. II 53 (14-16): 1560–1572.
Song W, Warren A, Xu H (2009) Free-Living Ciliates in the Bohai Sea and Yellow Sea, China. Beijing Science Press.
Tan X, Shi X, Liu G, Xu H, Nie P (2010) An approach to analyzing taxonomic patterns of protozoan communities for monitoring water quality in Songhua River, Northeast China. Hydrobiologia 638: 193–201.
Uroosa, Kazmi SSUH, Xu G, Xu H (2020) Insights into the effects of harmful algal bloom on ecological quality status using body-size spectrum of biofilm-dwelling ciliates in marine ecosystems. Mar. Pollut. Bullet. 160: 111596.
Van der Linden P, Patrício J, Marchini A, Cid N, Neto JM, Marques JC (2012) A biological trait approach to assess the functional composition of subtidal benthic communities in an estuarine ecosystem. Ecol. Indic. 20: 121–133.
Weitere M, Schmidt-Denter K, Arndt H (2003) Laboratory experiments on the impact of biofilms on the plankton of a large river, 48 (11): 1983–1992.
Wang Q, Xu H (2015) Colonization dynamics in the tropical-functional patterns of 6 biofilm-dwelling ciliates using two methods in coastal waters. J. Mar. Biol. Assoc. UK. 95 (4): 681–689.
Wang Z, Xu G, Xu H (2016a) Temporal variation in body-size spectrum of biofilm-dwelling protozoa during colonization process in coastal waters of the Yellow Sea. J. Mar. Biol. Assoc. UK. 96 (5): 1113–1118.
Wang Z, Xu G, Yang Z, Xu H (2016b) An approach to determining homogeneity of body-size spectrum of biofilm-dwelling ciliates for colonization surveys. Ecol. Indic. 61 (2): 865–870.
Xu M, Cao H, Xie P, Deng D, Feng W, Xu J (2005) Use of PFU protozoan community structural and functional characteristics in assessment of water quality in a large, highly polluted freshwater lake in China. J. Environ. Monit. 7: 670–4.
Xu H, Song W, Warren A, Al-Rasheid KAS, Al-Farraj SA, Gong J, Hu H (2008) Planktonic protist communities in a semi-enclosed mariculture pond: structural variation and correlation with environmental conditions. J. Mar. Biol. Assoc. U K. 88 (7): 1353–1362.
Xu H, Min GK, Choi JK, Jung JH, Park MH (2009a) An approach to analyses of periphytic ciliate colonization for monitoring water quality using a modified artificial substrate in Korean coastal waters. Mar. Pollut. Bull. 58 (9): 1278–1285.
Xu H, Zhang W, Jiang Y, Zhu M, Al-Rasheid KAS (2012a) An approach to analyzing influence of enumeration time periods on detecting ecological features of microperiphyton communities for marine bioassessment. Ecol. Indic. 18: 50–57.
Xu H, Zhang W, Jiang Y, Zhu M, Al-Rasheid KAS (2012b) Influence of sampling sufficiency on biodiversity analysis of microperiphyton communities for marine bioassessment. Environ Sci. Pollut. Res. 19: 540–549.
Xu H, Zhang W, Jiang Y, Yang EJ (2014a) Use of biofilm-dwelling ciliate communities to determine environmental quality status of coastal waters. Sci. Total Environ. 470-471: 511-518.
Xu G, Zhong X, Wang Y, Xu H (2014b) A multivariate approach to the determination of an indicator species pool for community-based bioassessment of marine water quality. Mar. Pollut. Bull. 87 (1-2): 147–151.
Xu G, Xu H (2016) Use of body-size distinctness of biofilm-dwelling protozoa for marine bioassessment. Ecol. Ind. 64: 152–157.
Xu G, Xu Y, Xu H (2016a) Insights into discriminating water quality status using new biodiversity measures based on a trait hierarchy of body-size units. Ecol. Indic. 60: 980–986.
Xu H, Jiang Y, Xu G (2016b) Spatial variations in annual cycles of body-size spectra of planktonic ciliates and their environmental drivers in marine ecosystems. Mar. Pollut. Bull. 112: 98–104.
Xu G, Xu H (2017) An approach to analysis of functional redundancy in protozoan communities for bioassessment in marine ecosystems. Ecol. Indic. 77: 41–47.
Xu G, Zhong X, Abdullah Al M, Warren A, Xu H (2018) Identifying bio indicators across trait-taxon space for assessing water quality in marine environments. Mar. Pollut. Bull. 131: 565–571.
Zhao L, Xu G, Wang Z, Xu H (2016) Body-size spectra of bio-film dwelling protozoa and their seasonal shift in coastal ecosystem. Eur. J. Protozool. 56: 32–40.
Zhang W, Xu H, Jiang Y, Zhu M, Al-Rasheid KAS (2012) Influence of enumeration time periods on analyzing colonization features and taxonomic relatedness of periphytic ciliate communities using an artificial substratum for marine bioassessment. Environ. Sci. Pollut. Res. 19: 3619–3627.
Zhang W, Liu Y, Warren A, Xu H (2014) Insights into assessing water quality using taxonomic distinctness based on a small species pool of biofilm-dwelling ciliate fauna in coastal waters of the Yellow Sea, northern China. Mar. Pollut. Bull. 89: 121–127.
Zhong X, Xu G, Wang Y, Xu H (2014) An approach to determination of functional species pool for community research. Ecol. Indic. 46: 78–83.
Zhong X, Xu G, Xu H (2017) Use of multiple functional traits of protozoa for bioassessment of marine pollution. Mar. Pollut. Bull. 119 (2): 33–38.