Between-year variation of periphyton community structure in two Appalachian headwater streams

Changes in species composition, richness, diversity, biomass (biovolume), and spatial community structure of a lotic periphyton community were observed under experimental acidification (mean pH 4.5) with and without aluminum, in troughs fed from an oligo-dystrophic creek (mean pH 6.7). in experimental and control troughs, the community was dominated by diatoms throughout the treatment. Achnanthes linearis was dominant in all troughs before treatment as well as in the control during the experiment. Eunotia pectinalis, which was rare in all troughs before treatment, became dominant in the acidified troughs. After 3 mo of acidification, algal cell density and biomass were respectively 30 and 40–70 times higher in the treated troughs as compared with that in the control. The Sow diversity (H = 1.45–2.30) characteristic of the control trough, increased to 3.3 in the treated troughs after 1 mo of acidification, but after 3 mo of experiment the diversity was slightly lower in experimental troughs. In the control trough, spatial organization of the community was characterized by monolayered arrangements during the whole experiment, in both acidified troughs (acid and acid plus aluminum) the community became multilayered (3–4 layers). The increased complexity of the community in the acidified troughs seemed to be related to a decrease in the abundance of grazers in the periphytic community, mainly the collector–gatherers Ephemeroptera and Orthocladiinae.

Download Full-text

Long-term exposure to silver nanoparticles affects periphyton community structure and function

Environmental Science Nano ◽

10.1039/c8en00132d ◽

2018 ◽

Vol 5 (6) ◽

pp. 1397-1407 ◽

Cited By ~ 6

Author(s):

Carmen Gil-Allué ◽

Ahmed Tlili ◽

Kristin Schirmer ◽

Mark O. Gessner ◽

Renata Behra

Keyword(s):

Silver Nanoparticles ◽

Community Structure ◽

Antimicrobial Agents ◽

Structure And Function ◽

Periphyton Community ◽

And Function

Silver nanoparticles (AgNPs) are widely used as antimicrobial agents.

Download Full-text

STUDI KEANEKARAGAMAN DAN STRUKTUR KOMUNITAS PERIFITON DI PERAIRAN SUNGAI COBAN RONDO MALANG

Jurnal Teknologi Terapan: G-Tech ◽

10.33379/gtech.v1i2.275 ◽

2020 ◽

Vol 1 (2) ◽

pp. 93-97

Author(s):

Zainal Abidin

Keyword(s):

Water Quality ◽

Cluster Analysis ◽

Community Structure ◽

Environmental Changes ◽

Aquatic Organisms ◽

Dominance Index ◽

Periphyton Community ◽

Similarity Indices ◽

And Cluster Analysis ◽

Index Value

Periphyton is a community of microorganisms that live attached to or adjacent to a substrate sink. For aquatic organisms, periphyton habitats have a relatively fixed. With it is so, the changes of water quality and substrate greatly affects the composition of his life and abundance. Periphyton composition and abundance depends on the tolerance or sensitivity to environmental changes. This study aims to determine each periphyton community in responding to changes in habitat quality by way of adjustment in community structure. The methodology used in this prektikum involves taking data from four stations along the river Coban Rondo, in each station there are 3 replicates. And take measurements of factors such environments as supportive data turbidity, flow rate, pH, and depth. Analyzed using Simpson's Dominance Index to determine the type of periphyton dominance, as well as morisita similarity indices and cluster analysis. The results showed that the diversity in each station belonging to the category of high (H more than 3.32) because the obtained value of the index H' between 3.2 to 3.48. Species that dominate from the four stations is Pinularia with an average Index Value Important (IVI) 31,5.

Download Full-text

Perifiton Community Structure in Citarik River

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2019/v5i430083 ◽

2020 ◽

pp. 1-8

Author(s):

Heti Herawati ◽

Nisa Hidayati Fitri ◽

Zahidah . ◽

Asep Sahidin ◽

Izza Mahdiana Apriliani ◽

...

Keyword(s):

Community Structure ◽

Research Method ◽

Diversity Index ◽

Survey Method ◽

Chemical Parameters ◽

Dominance Index ◽

Periphyton Community ◽

Physical And Chemical Parameters ◽

Index Value ◽

Physical And Chemical

The purpose of this research is to determine the condition of waters in the Citarik River with the periphyton community as a bio indicator. This research was conducted from March-April 2019. The research method used was a survey method at 4 station points, five times sampling with a span of 7 days. The smallest periphyton abundance is in station IV which is 22 ind/cm2 and the most is in station I which is 18278 ind/cm2. Comparison of species deficit values at each station is different, this is influenced by different physical and chemical parameters. The dominance index value in the waters of the Citarik River ranges from 0.1 to 0.8 and the diversity index value ranges from 0.2 to 0.9. The results showed the Citarik River was in a mildly polluted condition.

Download Full-text

Struktur Komunitas Alga Perifiton Sungai dalam Gua Batu Asahan di Sumpur Kudus Kabupaten Sijunjung Sumatera Barat

JURNAL BIOLOGI UNAND ◽

10.25077/jbioua.7.1.27-33.2019 ◽

2019 ◽

Vol 7 (1) ◽

pp. 27

Author(s):

Izmiarti Izmiarti

Keyword(s):

Community Structure ◽

Dominant Species ◽

Diversity Index ◽

Similarity Index ◽

Survey Method ◽

Clean Water ◽

Periphyton Community ◽

West Sumatra ◽

Number Of Individuals

The cave ecosystem has a unique environment because it receives minimal sunlight and does not even get sunlight at all. Dark conditions in the cave will affect producers such as periphyton algae that live in rivers in caves that need sunlight for photosynthesis. This study aims to determine the periphyton community structure in the river in the Batu Asahan Cave in Sumpur Kudus, Sijunjung District, West Sumatra. This research held in August 2016. The research was carried out by survey method at 3 stations: bright, dim and dark zones. The results showed that periphyton were found as many as 22 species classified as Bacillariophycea 13 species, Cyanophyceae 5 species, Chlorophyceae and Euglenophyceae each of 2 species. Based on the number of individuals Bascillariophyceae 67.0%, Cyanophyceae 24.49%, Chlorophyceae 4.79% and Euglenophyceae 3.72%. Population density in each zone was low, ranges from 1.26 - 2.82 ind / cm2. The dominant species vary in each zone which is the highest shown by Synedra ulna (Bacillariophyceae) and Oscillatoria tenuis (Cyanophyceae). Diversity index ranging from 2.11-2.47 is not significantly different between zones, indicating the quality of clean water. The equitability index was high (E = 0.88-0.96) show the populations in the community evenly. Similarity index between zones was low (C = 25 - 56%). Fisicochemical factors of water indicate the quality of clean water supports the life of periphyton algae in the river.

Download Full-text