Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient

Yang, Ying; Cao, Jinxiang; Pei, Guofeng; Liu, Guoxiang

doi:10.1007/s11356-015-5026-1

Cited by 19 publications

(13 citation statements)

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“…This study suggested that the BDI and TDI indices would be able to distinguish sites of various degrees of pollution and therefore, they may be adequately applied in Vietnam and other regions for surface water monitoring purpose. These results well agree with the previous study that benthic diatom assemblages could be used to assess human impacts on streams across a rural to urban gradient [30]. …”

Section: Discussionsupporting

confidence: 93%

Use of benthic diatom indices for assessing ecological status of the Sai Gon river, Vietnam

Pham¹

2018

VJSTE

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Abstract:In the present study, the Biological diatom index (BDI) and the Trophic diatom index (TDI) were calculated for the assessment the ecological status and the water quality of the Sai Gon river in comparison with the physico-chemical variables. In addition, a multivariate method was used to elucidate the main environmental variables driving the diatom community. A total of 87 diatom species were identified and used to calculate the diatom indices. The results of the biological data indicate that ecological status of upstream has a fine water quality; however, the downstream of the river was moderately polluted, and in some cases, of poor status. Canonical correspondence analysis (CCA) permutation tests demonstrated that diatom community was divided into two groups that corresponded to rural and urban characteristics. The BDI and TDI indices showed sensitivity to environmental stressors and served as potential application for bio-monitoring and water quality assessment of surface water in tropical region.

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Section: Discussionsupporting

confidence: 93%

Use of benthic diatom indices for assessing ecological status of the Sai Gon river, Vietnam

Pham¹

2018

VJSTE

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“…pyrenaicum and E. silesiacum mainly preferred waters confirming previous observations (Çelekli et al, 2019;Pillsbury et al, 2019;Hausmann et al, 2016;Yang et al, 2015;Black et al, 2011). From a functional point of view, as expected, Alpine streams belonging to R-A2 were characterized by low profile taxa confirming the adaptation of this guild to the resource limitations (Passy, 2007;Berthon et al, 2011;Novais et al, 2014;Stenger-Kovács et al, 2020) and its resistance to physical disturbance (i.e.…”

Section: Diatom Communities and Water Quality In The Two Macrotypessupporting

confidence: 87%

“…Recently, homogenization of diatom communities has also been observed in response to hydrological alterations and urbanization in Mediterranean rivers which also led to significant species loss at both local and regional scales (Falasco et al, 2021a) and a reduced role of diatoms in the total benthic chlorophyll-a (Piano et al, 2016). Moreover, the present study confirmed the high trophic value of some species, mainly collected in the R-C macrotype, such as N. gregaria (Hicks and Taylor, 2019;Hausmann et al, 2016;Szczepocka et al, 2016), Nitzschia palea (Licursi et al, 2016;Szczepocka et al, 2016;Yang et al, 2015), Gomphonema parvulum (Lu et al, 2020;Szczepocka et al, 2016) and C. euglypta (Trábert et al, 2020). S. nigri was confirmed as one of the most tolerant diatom species (see Hausmann et al, 2016 as Eolimna minima;Yang et al, 2015).…”

Section: Diatom Communities and Water Quality In The Two Macrotypessupporting

confidence: 82%

“…Moreover, the present study confirmed the high trophic value of some species, mainly collected in the R-C macrotype, such as N. gregaria (Hicks and Taylor, 2019;Hausmann et al, 2016;Szczepocka et al, 2016), Nitzschia palea (Licursi et al, 2016;Szczepocka et al, 2016;Yang et al, 2015), Gomphonema parvulum (Lu et al, 2020;Szczepocka et al, 2016) and C. euglypta (Trábert et al, 2020). S. nigri was confirmed as one of the most tolerant diatom species (see Hausmann et al, 2016 as Eolimna minima;Yang et al, 2015). On the contrary, other taxa such as A. minutissimum, A.…”

Section: Diatom Communities and Water Quality In The Two Macrotypessupporting

confidence: 81%

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Diatom communities and ecological status classification in the upper Po River basin

et al. 2021

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One of the main challenges in river management is the setting of nutrient thresholds that support good ecological status, which is the main objective to achieve for the European member states. This is a complex process, which needs an accurate analysis of the data collected so far for the ecological classification of rivers belonging to different typologies. We analysed the data of the multiannual monitoring concerning diatoms and nutrients in the upper Po River (NW Italy) with the aim of exploring the response of diatom community in terms of species composition, ecological guilds and indices. We considered data of 390 samples, of which 2/3 belonging to the “Central macrotype” (i.e. lowland stretches) and 1/3 to “Alpine siliceous”. We performed a Principal Coordinate Analysis to detect community patterns with respect to water chemical classification and macrotypes highlighting species and ecological guilds characteristic of samples along a water quality gradient. We then performed a partial RDA to focus on the role of environmental and spatial factors in shaping the diatom community in each of the two macrotypes. Finally, we investigated the concordance between the Italian normative indices ICMi (for diatoms) and LIMECO (a chemical index of water quality). We found significant differences in the diatom communities of the two macrotypes and in their response to water quality and to spatial factors. Communities resulted as much more uniform in sites with a low water quality, with characteristic species such as Navicula gregaria, Nitzschia palea and Sellaphora nigri. On the other hands, moderately disturbed sites (in terms of trophic level) were characterised by the highest guild diversity. The RDA confirmed the importance of spatial factors in shaping the diatom assemblages, especially in Alpine streams where the physical barriers may condition species dispersion. The comparison between the two normative indices highlights that the correspondence in the classification is achieved in the 57% (Alpine macrotype) and 43% (Central macrotype) of samples. According to our findings, we suggest the revision of the ICMi, both class boundaries and reference value. In addition, we recommend to lower LIMECO threshold for total phosphorus: indeed, several studies have shown significant changes in the diatom community composition starting from very low values (below the current LIMECO threshold, i.e. 50 µgL-1). Moreover, the extension of our study to the whole Po River basin will complete our knowledge of species not yet included in the diatom indices and of the community response to nutrient levels also in other macrotypes.

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“…Relative abundance is the most popular defining metric for dominant species in China (Yang et al, ) and all over the world (Jüttner et al, ; Feio et al, ; Adler et al, ). However, it is difficult to distinguish between dominances of species due to the lack of clear criteria.…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Wang

Xia

et al. 2016

Internat. Rev. Hydrobiol.

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An annual investigation on periphytic diatoms and physicochemical parameters was performed in Donghu Lake, China, to explore a suitable method to differentiate the dominant and subordinate taxa, and how they responded to the change of environmental factors. The results showed that: (1) a combined consideration of species frequency of occurrence and relative abundance for defining the dominant index was more appropriate than using solely relative abundance; (2) the dominant taxa Fragilaria capucina var. vaucheriae (Kützing) Lange‐Bertalot and Melosira varians Agardh responded insensitively to the environmental factors, whereas the subordinate species Fragilaria capucina Desmazieres var. capucina, Nitzschia amphibia Grunow, Achnanthidium exiguum (Grunow) Czarnecki and Melosira italica (Ehrenberg) Kützing showed the potential to be indicators; F. capucina var. radians (Kützing) Lange‐Bertalot increased along the gradient of higher water temperature (WT) and nutrients concentration, however, Fragilaria bidens Heiberg and Cymbella affinis Kützing were affected in the opposite direction. Our findings revealed that periphytic diatoms varied seasonally and were useful for assessing water quality of different trophic status. Especially the subordinate species showed the potential to be better indicators than the dominant species in Donghu Lake.

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Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient

Cited by 19 publications

References 50 publications

Use of benthic diatom indices for assessing ecological status of the Sai Gon river, Vietnam

Use of benthic diatom indices for assessing ecological status of the Sai Gon river, Vietnam

Diatom communities and ecological status classification in the upper Po River basin

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

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