taxonID	type	description	language	source
234670D8EEC55695B332182837CBF9B3.taxon	ecology	Ecology. Cyclostephanos dubius is considered to be a pelagic taxon, planktonic component of both fresh and brackish lakes (Cholnoky 1968). Often indicating meso- to eutrophic conditions, sometimes recorded for hypertrophic lakes (Van Dam et al. 1994; Kirilova et al. 2010). The species is common in flowing and stagnant water in coastal area, oligosaprobic, alkalibiontic, halophilous " 0.0 - 5 g / dm 3 " (Hustedt 1957); pH value above 7.0 (van der Werff and Huls 1957 - 1974; Foged 1973).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
4A87A68D2A7D5446B99CF1FF014E0585.taxon	ecology	Ecology. This taxon occurs in brackish and fresh water habitats, commonly found in estuaries of large rivers, also surviving in inland waters with high conductivity, this is a halophilic species. It has considerable abundance in epiphytic, benthic hard waters with relatively high electrical conductivity. Distributed and more abundant in warm-temperate and tropical waters, being mesohalobic, from alkalibiontic to alkaliphilic indicator, β-mesosaprobic, and eutraphentic (El-Awamri 2008).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
E8CC21D03F1A52259F248FF5A667C776.taxon	ecology	Ecology. This planktonic taxon has been mainly found in estuaries characterized by low salinity and high turbulence, and in seas, but also in freshwaters and may be a halophile indicator (Makarova 1988; Park et al. 2017 a; Barinova et al. 2019).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
AC3606D4CFAB50B7A11B1C57677A76DB.taxon	ecology	Ecology. Conticribra weissflogii is a planktonic diatom, from marine and brackish-water environments that also may occur in lacustric and riverine waters. It is reported to occur in a wide range of salinity 2 - 26 ‰ (representing oligohalobs to polyhalobs), especially at salinities above 5 ‰ (Stachura-Suchoples and Kulikovskiy 2014). This taxon tends to increase in population density with rising temperature (Lomas and Glibert 1999) as well as with eutrophication (Zheng et al. 2016). It is also known to grow in waters with relatively high pH, around 8 - 9.4 (Sala 1997).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
253E3A753E56591BA103B0980817E9A9.taxon	ecology	Ecology. The species was recorded as planktonic in water bodies of different types, typical for eutrophic / hypertrophic and highly saprobic marine, brackish, and fresh waters. It is euryhaline and eurythermal, in addition to being known as an alkaliphilic taxon (Okhapkin et al. 2016). Thalassiosira incerta was named an invasive taxon for Russia (Kastovsky 2010; Korneva 2014).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
C11EEE8559855D70926728DEB02E1993.taxon	ecology	Ecology. Planktonic taxon, preferring low salinities, usually occurring in salinities up to 15 ‰, recorded mainly for the brackish waters, however, is known from rivers, lakes, inland seas, coastal waters, and marshes, and often associated with eutraphentic conditions, temperate taxon, alkaliphilic (Hasle and Evensen 1975; Sarno et al. 2005; Hofmann et al. 2018). In addition, in the DAISIE database Skeletonema subsalsum is considered to be an invasive species for Russia's and Ireland's water bodies (Kastovsky 2010; Korneva 2014) but is not listed in the Handbook of alien species in Europe (2009).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
D62072E20FAA52A1B0EA8932B895C2DC.taxon	ecology	Ecology. Planktonic in lakes and rivers, indifferent, alkaliphilic, α-mesosaprobic, eutraphentic serving as an indicator of eutrophication in rivers, reservoirs, lakes worldwide mostly because of phosphorus loads (Hakansson and Stoermer 1984; Van Dam et al. 1994; Burge and Edlund 2016; Hofmann et al. 2018).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
F7849DE942DC53DAABB276945D6B1C0C.taxon	ecology	Ecology. Planktonic in rivers, lakes and reservoirs, freshwater, but mainly in mesotrophic-eutrophic water bodies. In addition, reported occurrence of this species in high numbers in highly mineralized waters (Genkal 2007; Genkal et al. 2009; Tsarenko et al. 2009).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
BC68D1C9F0405D348E5F1E436D20D327.taxon	ecology	Ecology. Marine and brackish, benthic-planktonic (tychoplanktonic) species, halophilic, widely distributed. Indicates significant organic pollution (eutrophication), α-mesosaprobiont (Kolpacov et al. 2014). This species prefers water enriched with dissolved organic matter, and is capable to switch from autotrophic to heterotrophic or mixed type of nutrition (Andreeva et al. 2008). Additionally, these diatoms are ubiquitous, and widely distributed in seas and estuaries of temperate zones in habitats with a moderate level with increased level of human impact (Kuzminova and Rudneva 2005; Ryabushko 2009).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
CD1BB2E304B25DF39ECF47CA39D59AC4.taxon	ecology	Ecology. Common species for freshwaters in streams and lakes, as well as in slightly brackish waters, oligotrophic, eutrophic to dystrophic or polluted environments (Nardelli et al. 2016; Hofmann et al. 2018). Taxon has preferences of alkaline conditions (pH 7 - 8.5), with moderate oxygen, regularly found in humid environments, requiring periodically high levels of nitrogen (Soltanpour-Gargari et al. 2011).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
07D5A7448BC8527F82757BDF62DB5426.taxon	ecology	Ecology. Aulacoseira subarctica is a planktonic alga in lakes, rivers, reservoirs and temporary water bodies and is confined to higher latitudes. It usually appears in response to moderate increases in nutrients, supposedly to phosphorus concentrations controlling its presence and is disadvantaged by further enrichment (Chris et al. 2003).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
195F3D4A4BC65BCEBA579BCA1C204527.taxon	ecology	Ecology. Cosmopolitan, planktonic and phytobenthic, alkalibiontic and halophytic species, occurring in brackish inland waters influenced by anthropogenic nutrients and salts, waters with moderate to high conductivity (222 - 918 μS / cm), pH ranges from 7.8 - 8.6, at a water temperature between 8.0 - 25.7 ° C and may serve as indicator of nutrient-rich habitats and polluted waters (Christie 2014; Vidakovic et al. 2016).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
0444550A6D0955C9BD0BC0F684DADD0E.taxon	ecology	Ecology. It is a planktonic taxon, described as eutraphentic (Hofmann et al. 2018). Stephanodiscus minutulus reaches greatest abundance in productive nearshore regions, in the mouths of large rivers and coastal embayments. This taxon is an indicator of increased TP concentrations, alkaliphilic, mesosaprobic indicator (Stoermer and Yang 1969; Bradbury et al. 2002; Reavie and Kireta 2015).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
8A17A8A89F4C5C1D866045680D1A8083.taxon	ecology	Ecology. Euplanktonic species, that may exist in marine, brackish or nearshore areas and freshwaters, indicating eutraphentic, α-mesosaprobous conditions and often associated with polluted, warm nutrient-rich water, however particularly tolerating high total phosphorus loads (Denys 1991; Van Dam et al. 1994; Yang et al. 2005; Lowe 2015), halophilic, alkaliphilic, tolerates higher ion concentrations and frequent osmotic stress as well as high temperature conditions and turbulence (Krammer and Lange-Bertalot 2000).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
89E297358E805FAE8A899FCEF001308E.taxon	ecology	Ecology. Aulacoseira islandica is most often occurring as planktonic or tychoplanktonic taxon in water bodies of different types in high latitude or high altitude oligotrophic to mesotrophic large waters (Houk et al. 2010; Stoermer and Julius 2013; Genkal et al. 2020). Sometimes this species may even cause a spring bloom (Stoermer and Julius 2013).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
75AAF112DFEB55EAA2C6FED25FCCF265.taxon	ecology	Ecology. Planktonic and benthic in freshwater reservoirs, lakes, rivers, and fossil. Lack of information for this taxon must be noted, but it is known that this species is very sensitive to salinity (Roubeix et al. 2014).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
FC8618A4C300549FA0FB42B068B05478.taxon	ecology	Ecology. Planktonic in rivers, lakes, freshwater, eutraphentic (Hofmann et al. 2018). It is regarded as an euryhaline species (Kiss et al. 2012).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
4ACFEC91171555BDA2671C6BA0DA6759.taxon	ecology	Ecology. According to literature data, C. marina has a high ecological relevance, with a preference in brackish waters, also inhabiting marine environments even with salinity ranges around 30 ‰; smaller numbers were recorded for freshwaters under 10 ‰ (Tanimura et al. 2004; Chung et al. 2010; Ake-Castillo et al. 2012). There are known cases where C. marina exists in shallow waters with freshwater discharges. At the same time, the appearance of this taxon is connected to high nutrient concentrations. In addition, cases of blooming of this species are known in the south-eastern Gulf of Mexico (Ake-Castillo et al. 2012).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
91130038E4C65C9681F0A2DF63C16419.taxon	ecology	Ecology. Cyclostephanos invisitatus was recorded as planktonic species from rivers, ponds, lakes, reservoirs and seas, freshwater, brackish and marine waters. Also known from waters of eutraphentic conditions, moderate and higher trophy and moderate alkalinity (Krammer and Lange-Bertalot 2000; Siver et al. 2005; Kirilova et al. 2010; Hofmann et al. 2018).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
1ACFE8F899EB591B97F96551749199D7.taxon	ecology	Ecology. This is a freshwater species, found growing in or near snow and in alpine pools (Houk et al. 2007; English and Potapova 2009) but was also reported for alkaline and acid waters (Kulikovskiy et al. 2016).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
A1B2DA94A46C513BAF59405D68801B1A.taxon	ecology	Ecology. Cyclotella choctawhatcheeana is a small centric diatom from the plankton of water bodies tolerating a wide temperature range. Originally this species was described as a marine species in the northern Gulf Coast of Florida; it is also recorded from several localities in Florida Bay and its global distribution is discussed (Prasad et al. 1990). For Germany, it was described from the River Schlei close to the Baltic Sea (Wendker 1991). Nowadays, it may be classified as an invasive species in brackish waters (Kiss et al. 2012). This species may grow in different seasons and with high and low nutrient availability (Oliva et al. 2008). In turn, some authors note that the existence of this species has a positive linear relationship with nutrient concentration (Jaanus et al. 2009).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
644DEB0656205EB487DC05FC7DCF59F7.taxon	ecology	Ecology. Cyclotella cryptica is a planktonic species, known from marine and brackish environments, may be found in high chloride concentrations. It occurs at maximum abundance around 20 ° C (Liu and Hellebust 1976; Makarewicz 1987; Mills et al. 1993). Cyclotella cryptica is a saprophilic species (Barinova et al. 2019), requires NO 3 as its source of nitrogen and Ni ions in order to grow autotrophically, however is capable of heterotrophic growth in bottom water or mud enriched in glucose and known to grow mesotrophically (Oliveira and Antia 1984; Saros and Fritz 2000).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
63DA2B6171D15D5687E0F84A27FE4B60.taxon	ecology	Ecology. Cyclotella meduanae was recorded ecologically as a planktonic taxon from different types of water bodies (lakes, reservoirs, rivers), freshwater and brackish, of different halobity, eutraphentic (Kiss et al. 2012; Genkal 2014; Hofmann et al. 2018).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
78ABD88973645856B1F009A6FBE38C22.taxon	ecology	Ecology. Cyclotella meneghiniana was recorded as tychoplanktonic, in coastal and estuarine locations with water of varied chemistry (Trigueros and Orive 2000). Its optimal development occurred at temperatures in the range of 20.1 - 20.6 ° C (Stoermer and Ladewski 1976) but it was eurythermal (Gasse 1986). This is a mesopolysaprobic, and eutraphentic taxon, particularly common for shallow, nutrient rich waters, favoured by moderately alkaline conditions (Hakansson 1993; Van Dam et al. 1994).	en	Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning, Jahn, Regine (2021): Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city. PhytoKeys 178: 31-69, DOI: http://dx.doi.org/10.3897/phytokeys.178.64426, URL: http://dx.doi.org/10.3897/phytokeys.178.64426
