Comparative responses of dominant and subordinate periphytic diatom species to environmental gradients in Donghu Lake, China

Chen, Wei; Wang, Qing; Xia, Shuang; Pei, Guofeng

doi:10.1002/iroh.201601845

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…Recent research reports diatoms behavior as consistent with SPH [65]; however, more evidence will be more conclusive. Samples with a high Dominance Index were inhabited by either generalists or specialists (group 1 and 2), which is consistent with observations reported by Soininen and Heino [66]; however, samples in group 3, which were more diverse, were dominated firstly by generalists and then specialists (contradictory to Soininen and Heino [66], but this was consistent with other analyses on lakes, as in e.g, [67,68]).…”

Section: Discussionsupporting

confidence: 91%

Limnological Characteristics and Diatom Dominants in Lakes of Northeastern Poland

Eliasz-Kowalska

Wojtal

2020

Diversity

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Determination of the relationships between environmental factors and diatom assemblages is usually made for several hundred lakes spread over a large area. However, the analysis of several lakes located near Lake Wigry also gives interesting results. Lakes in Wigry National Park (Poland) with broad similarity of geological origin show clear limnological, physical, and chemical differences. Here, we report on an investigation into how these dissimilarities influence diatom assemblages. Hierarchical Cluster Analysis showed that the studied lakes can be divided into three groups: (1) disharmonic, (2) harmonious with greater human impact on the environment, and (3) harmonious with a more limited human impact. The harmonious lakes could be divided into two groups that are mainly in line with the contents of the chloride and sulfates ions taken as indicative of human impacts on the environment. Overall, the three groups had different dominance structures, as reference to the Dominance Index (DI) made clear (mean values being: (1) −70.54%, (2) −72%, and (3) −54.58%, Generalized Linear Models with the categorical independent variable (group) showed significant differences between groups (for 1–3, 2–3) p value < 0.05). Lakes impacted by anthropopressure and disharmonic ones had the strongest dominance structure. More broadly, DI differences between the groups are consistent with the Species Pool Hypothesis (SPH), while studied differences can be said to result from natural geological dissimilarities, as well as disparate anthropogenic impacts.

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Section: Discussionsupporting

confidence: 91%

Limnological Characteristics and Diatom Dominants in Lakes of Northeastern Poland

Eliasz-Kowalska

Wojtal

2020

Diversity

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“…The formation of these lakes is mainly due to the meandering of the Yangtze River and associated flooding (Dong, Anderson, Yang, Chen, & Shen, 2012). Previous investigations have revealed that diatoms are a potential indicator of water quality, but these studies were mainly conducted at a single lake (W. Chen, Wang, Xia, & Pei, 2016; Hu et al, 2009; Lei, Shi, & Wei, 2003; Zeng et al 2018). In Donghu Lake, one of the largest lakes in Wuhan City, the nutrient enrichment caused a shift of dominant diatom species from epiphytic species in the 1950s to planktonic species such as Cyclotella meneghiniana Kützing, Aulacoseira granulata (Ehrenberg) Simonsen, and Stephanodiscus hantzschii Grunow in the early 21st century (Lei et al, 2003; Rao & Zhang, 1980).…”

Section: Introductionmentioning

confidence: 99%

Changes in summer diatom composition and water quality in urban lakes within a metropolitan area in central China

Liang

Huang

Stevenson

et al. 2020

Internat Rev Hydrobiol

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Urbanization is altering water quality and biotic communities of lake ecosystems worldwide, especially in developing regions. In this study, the diatom community structure and water quality of the epilimnion were analyzed in 38 lakes (40 sampling sites) in Wuhan City (central China) to assess the impacts of urbanization on lake ecosystems. Diatom communities displayed clear variation along the urban-to-rural gradient, with blooms of eutrophic species found in urban lakes in contrast to higher abundances of mesotrophic or oligotrophic taxa in rural lakes. Redundancy analyses revealed that the diatom community recognition to species, genus, and ecological guild level were all significantly correlated with Chl a, Si, and secchi depth, indicating that the changes in diatom communities were mainly explained by differences in nutrient concentrations and light condition. Considering the rapid urbanization and population expansion, it is important to carry out effective measures for the protection of these lake ecosystems, especially by reducing sewage discharge. The high consistency found between diatom community classification and water quality status highlights the applicability of diatoms for bioindication of shallow urban lakes, especially in rapidly developing cities. Even the taxonomic determination at the level of genera or ecological guilds can enable rapid water-quality assessment. K E Y W O R D S diatoms, ecological guild, redundancy analysis, the Yangtze floodplain, urban lakes, Wuhan City

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Clams on stilts: a phytoplankton bioassay investigating effects of wastewater effluent amendments and Corbicula fluminea grazing

Mussen,

Berg,

Driscoll

et al. 2024

Aquat. Biol.

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Shallow-water habitats are being restored in the Sacramento-San Joaquin River Delta with the goal of enhancing phytoplankton production and food availability for higher trophic levels. However, elevated grazing pressure from the non-native freshwater clam Corbicula fluminea and localized depletions of dissolved inorganic nitrogen may limit phytoplankton biomass accumulation in restored habitats. To evaluate interactions between nutrients and grazing on phytoplankton productivity and biomass accumulation, Sacramento River water high or low in phytoplankton biomass was amended with wastewater effluent, presence of C. fluminea, or both, in 48 h in situ incubations. We measured changes in chl a concentration, phytoplankton community composition, and photosynthetic efficiency as well as carbon and nitrogen uptake rates as indicators of phytoplankton responses. Diatoms dominated phytoplankton communities before and after incubation. Chl a concentrations increased 0.7 and 7.4 times in the high and low phytoplankton biomass controls, respectively, and 4.5 and 14 times in the high and low phytoplankton biomass effluent-added treatments, respectively. In the clam treatments, chl a accumulation was suppressed to near zero regardless of effluent additions or initial phytoplankton biomass. In treatments with clams and effluent combined, phytoplankton photosynthetic efficiency was nearly 50% lower than in the effluent-only treatments, suggesting phytoplankton were stressed in the presence of clams. This experiment demonstrated that the presence of clams can prevent the accumulation of phytoplankton biomass, both directly by clam filtering and indirectly by depressing phytoplankton photosynthetic efficiency and rate of growth. We recommend that future wetland restoration projects promoting increased phytoplankton biomass assess clam settlement likelihood as well as nutrient availability.

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Comparative responses of dominant and subordinate periphytic diatom species to environmental gradients in Donghu Lake, China

Cited by 3 publications

References 37 publications

Limnological Characteristics and Diatom Dominants in Lakes of Northeastern Poland

Limnological Characteristics and Diatom Dominants in Lakes of Northeastern Poland

Changes in summer diatom composition and water quality in urban lakes within a metropolitan area in central China

Clams on stilts: a phytoplankton bioassay investigating effects of wastewater effluent amendments and Corbicula fluminea grazing

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