An Overview of River Algae

NecchiJr., Orlando

doi:10.1007/978-3-319-31984-1_1

Cited by 7 publications

(7 citation statements)

References 12 publications

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“…The algae were observed in three replicates from each sampling point using a light microscope (Omano, Japan) with 100x magnification. The identification was carried out up to genus level according to Bellinger & Sigee (2015) [12], Necchi Jr. (2016) [13], and Wehr (2015) [14]. The algae density was measured by counting the algae cells in 40 of the 1000 grids of a Plastic Sedgwick Rafter Counting Chamber, in which 30 grids were expected to reveal the presence of 90-95% species [12].…”

Section: Biological Analysismentioning

confidence: 99%

The Determination of Algae Group as Bioindicator of Water Quality Change Affected by Mercury Release from Artisanal Small-Scale Gold Mining (ASGM)

Ariesyady

Purba

2022

J. Eng. Technol. Sci.

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Artisanal small scale gold mining (ASGM) practices typically use mercury for amalgamation. Near water environments this can degrade water quality and aquatic biota, including algae. Changes in algal communities can reflect water environment disturbance. The aim of this study was to determine if algae can be used as bioindicator of river water quality impacted by ASGM activities. The research was conducted from July to October 2018 at thirty sampling sites along rivers near ASGM areas in several regencies of Indonesia. Composite samples of water and sediment were collected. A plankton net and brushing methods were used to collect planktonic and benthic algae, respectively. The physicochemical parameters of the water and the sediment as well as the dominant algae genera were analyzed statistically with principal component analysis. The results showed that the total mercury concentration in the water ranged from <0.04 to 20 µg.L-1, while in the sediment the maximum value was 13,500 µg.kg-1. The total mercury content in the sediment was negatively correlated with the dominant benthic Navicula at a significance level of p < 0.05. This means that a low density of benthic Navicula can be proposed as a bioindicator of water quality, indicating the increase of mercury pollution in sediment.

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Section: Biological Analysismentioning

confidence: 99%

The Determination of Algae Group as Bioindicator of Water Quality Change Affected by Mercury Release from Artisanal Small-Scale Gold Mining (ASGM)

Ariesyady

Purba

2022

J. Eng. Technol. Sci.

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“…It can swim freely water columns and sometimes forms dense carpets just below the surface of water [13]. The allelopathic activity of Ceratophyllum demersum was reported by [14] when they investigated the allelopathic effect on four strains of phytoplankton. The objective of this study was to investigate the allelopathic effect of two algae species and an aquatic plant when their dry parts incorporated to the soil which is the growth medium of the bio-assayed durum wheat.…”

Section: Introductionmentioning

confidence: 99%

The Allelopathic Potential of some Lower Plants on Growth, and Yield of Wheat Plants

Ali,

Maulood,

Amin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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A completely randomized design pot experiment was executed in the College of Science, Salahaddin University glass house to investigate the allelopathic potentiality of dried shoot parts of two algae two (Chara sp. and Cladophora glomerata) and aquatic plant species (Ceratophyllum desmersum) when incorporated in different concentrations [0 (control), 0.5, 1.0, 1.5, and2.0 %] to the pot’s soil on germination and growth of hard Wheat (Triticum durum). Results showed the stimulating effect of both algae species Chara sp. and Cladophora Sp. on wheat plant’s height (71.44 and 81.66 cm), shoot dry weight to (4.46 and 9.00 g), spike weight (2.05 and 3.06 g), spike length (16.16 and16.80 cm), number of grains per spike (26.22 and 36.77 grain. Spike −1), yield per plant (4.78 and 10.30 g. plant−1), thousand grains weight 59.40 and 64.90 g) respectively comparing to control treatmenst. The aquatic plant species dried shoot parts negatively affected the wheat plants’ flag leaf length and width, shoot dry weight, and yield per plant. The allelopathic index indicated the stimulatory effect when the index was higher than unity 2.30 and 2.03 for both algae species. The inhibiting effect when the index value was lower than unity 0.52 for the aquatic plant.

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“…Ecological studies on benthic or periphytic algae in lotic systems in central Brazil, especially unpolluted ones, are very scarce (e.g. França et al 2017), despite their importance as primary producers and their strategic position at the bottom of trophic cascades (Necchi Jr. 2016).…”

Section: Introductionmentioning

confidence: 99%

Soft-bodied benthic algae in pristine Brazilian streams: from acid to karst

2019

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This study evaluated soft-bodied benthic algae from seven streams located in protected areas of central Brazil (Parque Nacional de Brasília, Parque Nacional da Chapada dos Veadeiros and Parque Estadual de Terra Ronca), and related them to abiotic factors. We addressed the following questions: A) how algal community structure in Cerrado streams is influenced by the marked seasonality typical of the region; and B) how karst geology influences algal communities in Parque Estadual de Terra Ronca, as compared to streams in other Cerrado areas. Samples were collected between 2012 and 2013 from a single site in each stream, and upstream and downstream of caves present in Parque Estadual de Terra Ronca. Altogether, 159 taxa were recorded. Algal community structure varied significantly among sites, but not between seasons, despite relatively lower abundances during the rainy season, likely due to a negative influence of the faster currents in streams during this period. Some alkaliphilic species were observed only at sites near caves (e.g. the cyanobacterium Tolypothrix distorta), while acidophilic taxa were more frequent in the other streams (e.g. desmids and Cyanobacteria such as Scytonema caldarium, Hapalosiphon stuhlmannii and Stigonema ocellatum). We observed a rare green alga, Microthamnion kuetzingianum, and reported the cyanobacterium Rivularia aquatica for the first time in Brazil.

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An Overview of River Algae

Cited by 7 publications

References 12 publications

The Determination of Algae Group as Bioindicator of Water Quality Change Affected by Mercury Release from Artisanal Small-Scale Gold Mining (ASGM)

The Determination of Algae Group as Bioindicator of Water Quality Change Affected by Mercury Release from Artisanal Small-Scale Gold Mining (ASGM)

The Allelopathic Potential of some Lower Plants on Growth, and Yield of Wheat Plants

Soft-bodied benthic algae in pristine Brazilian streams: from acid to karst

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