scholarly journals Influence of ecological filters on phytoplankton communities in semi-arid solar saltern environments

2015 ◽  
Vol 27 (1) ◽  
pp. 39-50 ◽  
Author(s):  
Raiane Santos Costa ◽  
Joseline Molozzi ◽  
Luiz Ubiratan Hepp ◽  
Diógenes Félix da Silva Costa ◽  
Paulo Roberto Nunes da Silva ◽  
...  
Keyword(s):  
Phytoplankton Community ◽  
Diversity Index ◽  
Negative Relationship ◽  
Soluble Reactive Phosphorus ◽  
Ammonium Ion ◽  
Wiener Diversity Index ◽  
Phytoplankton Communities ◽  
Abiotic Variables ◽  
Reactive Phosphorus ◽  
Ecological Filters

ObjectiveThis study analyzed the influence of ecological filters (abiotic variables) on the phytoplankton community in hypersaline ecosystems.MethodsThe abiotic variables measured herein were: pH, water temperature, salinity, ammonium ion, total nitrogen, nitrite, nitrate, total phosphorus, and soluble reactive phosphorus. The phytoplankton community was studied for density, richness and Shannon-Wiener diversity index. Data were analyzed using analysis of variance, linear regression and Canonical correspondence analysis (CCA).ResultsIn total, 110 taxa were identified in 3 solar salterns, distributed into 9 taxonomic classes, with the predominance of Cyanobacteria (41.8%) and Bacillariophyceae (22.7%). The species Pseudanabaena galeata was the only species sampled in all saline environments. Salinity significantly influenced the richness in the three salterns, Augusto Severo (F(1,22) = 23.2, p <0.001), Francisco Menescal (F(1,22) = 50.02, p <0.001) and Santa Clara (F(1,22) = 66.33, p <0.001). The first two CCA axes explained 41.6% of total data variability, with a negative relationship with soluble reactive phosphorus for axis 2.ConclusionThe study showed the influence of the dynamics of salterns ecosystems on the phytoplankton community structure. This is associated with filters developed by the environment, where the increasing salinity, temperature and precipitation of salts influence the composition of these organisms in the ecosystem.

scholarly journals Phytoplankton community structure in Menjer Lake, Central Java

2021 ◽  
Vol 869 (1) ◽  
pp. 012037
Author(s):  
F Sulawesty ◽  
G P Yoga ◽  
L Subehi ◽  
R Rosidah
Keyword(s):  
Community Structure ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Nutrient Content ◽  
Cell Counting ◽  
Phytoplankton Community Structure ◽  
Nitrogen And Phosphorus ◽  
Central Java ◽  
Phytoplankton Communities ◽  
Ecological Pressure

Abstract The occurrence of land changes around Lake Menjer, Central Java Province will affect the condition of water quality subsequently will affect biota, including phytoplankton. The purposes of study was to analyze the composition and abundance of phytoplankton in Menjer Lake regarding to nutrient content i.e. nitrogen and phosphorus. Observations on the phytoplankton community were conducted in July and October 2019 at six locations in Menjer Lake. Water samples were taken at the water surface as much as 10 L filtered using plankton net. Identification was carried out under the inverted microscope Diaphot 300. The abundance was calculated using the Sedgwick Rafter cell counting (SRCC) method. Analysis of the phytoplankton community structure was derived by calculating the Diversity Index, Evenness Index, and Simpson Dominance Index. The nutrient content in Menjer Lake influences the structure of phytoplankton communities quantitatively and qualitatively. Observation showed that the diversity of phytoplankton was low and there was one species dominanted, the result explained that the phytoplankton community in Menjer Lake is unstable and there is ecological pressure on the community. It can be concluded that the improvement of environmental conditions around Menjer Lake is the basis for the sustainable management of Menjer Lake.

scholarly journals Phytoplankton Community Investigation and Water Quality Assessment of M River in winter in Shijiazhuang City

2021 ◽  
Vol 267 ◽  
pp. 01035
Author(s):  
Ziqi Zhang ◽  
Lei Yang ◽  
Dongxu Han ◽  
Hongyan Shen
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Water Body ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Water Quality Assessment ◽  
Species Diversity Index ◽  
Wiener Diversity Index ◽  
Eutrophic Water ◽  
Evenness Index

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species of phytoplankton belonging to 6 phyla and 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted for 34.21%, followed by Cyanophyta with 26.32% and Chlorophyta with 28.95%. The density of phytoplankton was 63.0*106 inds/L which indicated as eutrophic water body. The highest density was Bacillariophyta, accounting for 51.03%. The Shannon-Wiener diversity index (H’) varied from 1.34 to 2.24, the Margalef Species diversity index (d) varied from 2.71 to 3.85, and the Pielou evenness index (J) varied from 0.38 to 0.67. According to the integrative analysis results of H’, d and J, M River water quality belongs to oligo-polluted, but individual sites belong to meso-polluted.

Enhanced Activity of Alkaline Phosphatases - Phytoplankton Response to Epilimnetic Phosphorus Depletion

1993 ◽  
Vol 28 (6) ◽  
pp. 15-24 ◽  
Author(s):  
J. Vrba ◽  
J. Komárkova ◽  
V. Vyhnálek
Keyword(s):  
Algal Blooms ◽  
Phytoplankton Community ◽  
Phytoplankton Bloom ◽  
Soluble Reactive Phosphorus ◽  
High Input ◽  
Alkaline Phosphatases ◽  
Spring Phytoplankton Bloom ◽  
Reactive Phosphorus ◽  
Longitudinal Sampling ◽  
Phosphorus Depletion

The stratified, eutrophic ůímov Reservoir (South Bohemia) receives a considerable input of phosphorus. However, phytoplankton development in the epilimnion has often been P-limited (&lt;5 µg.1−1 of soluble reactive phosphorus) during spring and summer when algal maxima are observed. Alkaline phosphatase activity (APA) was measured in the epilimnion (0-2 m) using a fluorimetric method. The seasonal course of APA (range 6.7-726.7 nmol.1−1.h−1) roughly followed that of chlorophyll a (r2 = 0.45) in 1990. During algal blooms, a significant percentage of total APA was found in the 2.5-100 µ µm fraction containing most of the algae. Very similar relationships were found by a longitudinal sampling of the reservoir epilimnion during the spring phytoplankton bloom in 1991, despite high P concentrations in the reservoir's tributary. Hence, phytoplankton can be P-limited in the epilimnion, even in a eutrophic reservoir with a high input of P. This study shows that the phytoplankton community might adapt to phosphorus depletion by changing species composition and/or by increasing APA.

scholarly journals Comparative Study on Phytoplankton Community in Two Newly Dug Ponds in Institut Teknologi Sumatera

2020 ◽  
Vol 5 (1) ◽  
pp. 63-69
Author(s):  
Hendry Wijayanti ◽  
Andy Darmawan
Keyword(s):  
Phytoplankton Community ◽  
Diversity Index ◽  
Species Abundance ◽  
Mean Value ◽  
Linear Mixed Effect Model ◽  
Reservoir Water ◽  
Mixed Effect ◽  
Algae Biomass ◽  
Phytoplankton Diversity ◽  
Wiener Diversity Index

Phytoplankton community plays an important ecological role in the aquatic ecosystems as the primary producers and forms the fundament of the aquatic food chain for supporting the water community. Thus, the phytoplankton community structure is a good indicator of water quality due to its sensitiveness to environmental stresses. Two newly dug ponds in Institut Teknologi Sumatera may give an opportunity to study the early colonizing stages of various freshwater communities including phytoplankton. The study attempted to determine the composition and abundance of phytoplankton. Samples were collected from two ponds (A and C) in the reservoir water of Institut Teknologi Sumatera. The content of Phosphorus (P), Nitrogen (N), and Chlorophyll-a (algae biomass) were determined. Phytoplankton had higher diversity in Pond C than Pond A in the study period, in which a total of seven taxa were found, namely Bacillariophycea, Cyanophyceae, Chlorophyceae, Conjugatophyceae, Dinophyceae, Euglenophyceae, Gymnodiniaceae. The most species abundance of both ponds was Peridinium sp. and Trachelomonas sp. The Pond C had the highest mean value of the Shannon-Wiener diversity index. The Linear mixed-effect model showed that low turbidity will result in high phytoplankton diversity. The finding of this study suggests that higher phytoplankton diversity would achieve a natural carrying capacity, and thus would serves as an indicator of ecosystem health.

scholarly journals Factors affecting plant biodiversity in the homesteads of rural areas under process of modernization in Bangladesh

2018 ◽  
Vol 8 (1) ◽  
pp. 44-54
Author(s):  
MR Islam ◽  
MA Baten ◽  
SMA Hossain ◽  
SM Afroz ◽  
K Naher
Keyword(s):  
Regression Analysis ◽  
Rural Areas ◽  
Diversity Index ◽  
Environmental Awareness ◽  
Negative Relationship ◽  
Plant Biodiversity ◽  
Nutritional Knowledge ◽  
Factors Affecting ◽  
Agricultural Knowledge ◽  
Wiener Diversity Index

A study was carried out at selected villages in Gazipur district of Bangladesh during 2008- 2009 to assess the changes in biodiversity of rural homesteads with modernization and factors affecting the biodiversity. Three villages were selected purposively considering their degree of modernization e.g. traditional, semi-modern and modern village and biodiversity at 40 randomly selected homesteads from each of the three villages were studied. Shannon- Wiener diversity index (H) value for traditional village (1.652) was statistically similar to semi-modern village (1.373) but significantly higher (t = 2.47*) than that of modern village (1.029). It indicates that plant biodiversity is decreasing significantly with modernization and/or urbanization. For assessing factors affecting biodiversity in the homesteads, a total of 26 factors were considered of them 15 factors had significant relationship with biodiversity. Factors like, family size, establishment of homestead, agricultural knowledge, nutritional knowledge, primary health care knowledge, environmental awareness, innovativeness, homestead area, income from homestead, savings, access to credit, disturbance of theft and predators, and utilization of modern agro-technologies had significant positive relationship; while ‘fragmentation of homestead’ and ‘sanitation’ had significantly negative relationship with homestead biodiversity. Linear multiple regression analysis showed that eight factors such as, agricultural knowledge, nutritional knowledge, environmental awareness, homestead area, income from homestead, innovativeness, homestead fragmentation and sanitation had significant contribution to homestead biodiversity. These eight significant factors explained 75.2 percent (adjusted R2 = 0.752) of the total variation in the homestead biodiversity. However, stepwise regression analysis revealed that ‘homestead area’ had the largest possible contribution (55.7%) to variation in the homestead biodiversity, followed in descending order by agricultural knowledge (9.5%), income from homestead (5.0%), environmental awareness (2.9%), sanitation (2.3%), nutritional knowledge (1.6%), innovativeness (1.0%) and fragmentation of the homestead (1.0%).Int. J. Agril. Res. Innov. & Tech. 8 (1): 44-54, June, 2018

scholarly journals Impact of the 2009 extreme water level variation on phytoplankton community structure in Lower Amazon floodplain lakes

2012 ◽  
Vol 23 (3) ◽  
pp. 260-270 ◽  
Author(s):  
Simone Casali ◽  
Maria do Carmo Calijuri ◽  
Bernard Barbarisi ◽  
Vivian Fróes Renó ◽  
Adriana Gomes Affonso ◽  
...  
Keyword(s):  
Community Structure ◽  
Water Level ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Water Level Fluctuations ◽  
Phytoplankton Community Structure ◽  
Extreme Water Level ◽  
Hydrological Conditions ◽  
Amazon Floodplain ◽  
Phytoplankton Communities

AIM: This paper examines the effect of the extreme water level change in 2009 on the structure and diversity of the phytoplankton communities in lakes of the Lower Amazon Floodplain, and compares it to phytoplankton community structure data reported in the literature for 2002 and 2003 high water periods, closer to the normal hydrological conditions. METHODS: Sub-surface integrated water samples for phytoplankton and chlorophyll-a analyses were collected during high and low water phases in 2009. Water temperature (°C), pH, turbidity (NTU) and electrical conductivity (µS.m-1) were measured, and the Shannon diversity index was calculated. RESULTS: The results showed striking differences in taxonomic composition between phases (high and low) and also between normal (2002 and 2003) and extreme (2009) hydrological conditions, all related to the flood pulse intensity. CONCLUSIONS: Extreme water level fluctuations can result in shifts in phytoplankton community structure and diversity. This work represents a valuable contribution to phytoplankton research since presents the community structure under extreme hydrological events in the Amazon floodplain.

scholarly journals Diversity, Distribution and Density of Estuarine Phytoplankton in The Sundarban Mangrove Forests, Bangladesh

2012 ◽  
Vol 41 (1) ◽  
pp. 87-95 ◽  
Author(s):  
Abdul Aziz ◽  
Mashrura Rahman ◽  
Ashfaque Ahmed
Keyword(s):  
Diversity Index ◽  
High Capacity ◽  
Principal Component ◽  
Diversity Indices ◽  
Mangrove Forests ◽  
Low Salinity ◽  
Wiener Diversity Index ◽  
Phytoplankton Communities ◽  
Sundarban Mangrove ◽  
Estuarine Phytoplankton

Diversity, distribution and density of estuarine phytoplankton from nine sites under four Ranges of the Sundarban Mangrove Forests (SMF), Bangladesh have been studied. The phytoplankton communities represented by 36 species which belonged to Chlorophyceae (3), Euglenophyceae (2), Bacillariophyceae (30) and Xanthophyceae (1). Occurrence of taxa and their densities were highest near the confluence of Hangsha River (R) with the river Murdat at Patcosta. Shannon-Wiener diversity index was also highest (H = 3.494) in this area. Lowest density of phytoplankton and diversity indices (H = 1.661) were found in Bal R., Bisandri Khal and Kalabogi R. Oocystis pusilla, Coscinodiscus excentricus, C. lineatus and Navicula brekkeansis occurred abundantly, while Cyclotella comta, Thalassionema nitzschioides and Lioloma delicatula were common. Coscinodiscus lineatus was distributed in all the nine sites including high and low tides indicating its high capacity to tolerate habitat fluctuations. Chaetoceros socialis was found only in Passur R. with low salinity, conductivity and total dissolved solids. The total numbers of phytoplankton individuals per liter were generally higher during low tide than those of high one. Principal Component Analysis (PCA) showed the relationship between pH and some species of phytoplankton DOI: http://dx.doi.org/10.3329/bjb.v41i1.11086 Bangladesh J. Bot. 41(1): 87-95, 2012 (June)

scholarly journals Variation in Phytoplankton Community Due to an Autumn Typhoon and Winter Water Turbulence in Southern Korean Coastal Waters

2020 ◽  
Vol 12 (7) ◽  
pp. 2781 ◽  
Author(s):  
Seung Ho Baek ◽  
Minji Lee ◽  
Bum Soo Park ◽  
Young Kyun Lim
Keyword(s):  
Coastal Waters ◽  
Algal Blooms ◽  
Phytoplankton Community ◽  
Abiotic Factors ◽  
Negative Relationship ◽  
High Density ◽  
Centric Diatom ◽  
Cold Temperatures ◽  
Phytoplankton Communities ◽  
Water Turbulence

We evaluated changes in the phytoplankton community in Korean coastal waters during October 2016 and February 2017. Typhoon Chaba introduced a large amount of freshwater into the coastal areas during autumn 2016, and there was a significant negative relationship between salinity and nutrients in the Nakdong estuarine area, particularly in the northeastern area (Zone III; p < 0.001). The abundance of diatom species, mainly Chaetoceros spp., increased after this nutrient loading, whereas Cryptomonas spp. appeared as opportunists when there was relatively low diatom biomass. During winter, biotic and abiotic factors did not differ among the surface, middle, and lower layers (p > 0.01; ANOVA), implying that water mixing by winter windstorms and low surface temperature (due to the sinking of high-density water) physically accelerated mixing of the whole water column. Diatoms predominated under these conditions. Among diatoms, the centric diatom Eucampia zodiacus remained at high density at the inshore area and its abundance had a negative correlation with water temperature, implying that this species can grow at cold temperatures. On the other hand, the harmful freshwater diatom Stephanodiscus hantzschii mainly appeared in conditions with low salinity and high nutrients, implying that it can persist even in the saltwater conditions of the Nakdong Estuary. Our results indicate that hydro-oceanographic characteristics, such as river discharge after an autumn typhoon and winter water turbulence, have major effects on the composition of phytoplankton communities and can potentially affect the occurrence and characteristics of harmful algal blooms in southern Korean coastal waters.

Investigation of Phytoplankton and Evaluation on Water Quality of Taizi River in Liaoyang Area

2014 ◽  
Vol 955-959 ◽  
pp. 403-406 ◽  
Author(s):  
Hong Wei Wang ◽  
Qing Chao Xing ◽  
Chun Long Zhao ◽  
Hai Tao Zhao ◽  
Liang Ma ◽  
...  
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Species Diversity Index ◽  
Wiener Diversity Index ◽  
Evenness Index ◽  
Taizi River ◽  
Better Than

To evaluate water quality, an investigation of phytoplankton community was conducted in Taizi River of Liaoyang Area, June 2011. The results showed that 130 species of phytoplankton belong to 6 phyla and 63 genera existed. Chlorphyta has the richest species of algae, which accounted for 43.85% of the total number, followed by Bacillariophyta (32.41%). Water quality in upstream is better than downstream. Species and biomass of Cyanophyta and Euglenophyta which have tolerance of pollution increasing According to the integrative analysis result of Shannon-Wiener diversity index, Pielou Evenness index and Margalef Species diversity index, Taizi river is judged belong to low-polluted or oligo- polluted，but some sites belong to β -moderate polluted, effective managements should be taken in order to control the water pollution.

scholarly journals Structure Of Phytoplankton Communities In Seagraas Ecosystem Of Kelurahan Tongkeina Bunaken Darat District

2019 ◽  
Vol 10 (2) ◽  
pp. 60
Author(s):  
Nikita Kekenusa ◽  
Rose O.S.E Mantiri ◽  
Gaspar D Manu
Keyword(s):  
Relative Density ◽  
Coastal Waters ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Mesh Size ◽  
Phytoplankton Species ◽  
Phytoplankton Community Structure ◽  
Dominance Index ◽  
Seagrass Ecosystem ◽  
Phytoplankton Communities

This research was conducted at 3 stations in the seagrass ecosystem of the Tongkeina coastal waters district of Bunaken Darat Manado on March 16, 2019, at 10:35 - 13:45 WITA. This study aims to know the types and community structures of phytoplankton in the Tongkeina seagrass ecosystem and its environmental conditions. The method used to collect the sample is sampling. Samples were taken using a plankton net measuring 20 cm in mouth diameter with a mesh size of 60 microns. Based on the results of observations obtained by the composition of phytoplankton species, namely 17 genera of 22 species in 3 classes namely Bacillariophyceae, Cyanophyceae, and Pyramimonadophyceae. The highest density of phytoplankton in Tongkeina waters is at Station 2 (0.360 cells / l) with the highest relative density of Chaetoceros sp. (19.10%). While the highest density of phytoplankton is found at Station 3 (0.516 cells / l) with the highest relative density of Melosira sp. (21.69%). The lowest Diversity Index at Station 2 (H '= 2,217) and the highest at station 3 (H' = 2,284). This shows that overall these waters have moderate diversity values. The lowest Uniformity Index at Station 1 (e = 0.858) and the highest at Station 2 (e = 0.924). This shows that overall these waters have a medium uniformity value. The lowest dominance index at Station 3 (C = 0.119) and the highest at Station 1 (C = 0.127). This shows that no species dominate the waters. The water conditions such as temperature, salinity, pH, and brightness still support the growth of phytoplankton.Keywords: phytoplankton, community structure, seagrass, Tongkeina ABSTRAKPenelitian ini dilakukan pada 3 stasiun di  perairan ekosistem lamun kelurahan  Tongkeina kecamatan Bunaken Darat pada tanggal 16 Maret 2019 pukul 10:35 – 13:45 WITA, dengan tujuan mengetahui jenis dan struktur komunitas fitoplankton yang ada di perairan ekosistem lamun  Tongkeina serta kondisi lingkungannya. Metode yang digunakan adalah Metode sampling. Sampel diambil dengan menggunakan plankton net berdiameter mulut berukuran 20 cm dengan mesh size 60 mikron. Berdasarkan hasil pengamatan diperoleh komposisi jenis fitoplankton  yakni 17 genus 22 spesies dalam 3 kelas yaitu Bacillariophyceae, Cyanophyceae, dan Pyramimonadophyceae.Kepadatan tertinggi fitoplankton di perairan Tongkeina terdapat pada Stasiun 2 (0.360 sel/l) dengan kepadatan relatif tertinggi Chaetoceros sp. (19.10%). Sedangkan  kepadatan fitoplankton tertinggi terdapat pada Stasiun 3 (0.516 sel/l) dengan kepadatan relatif tertinggi Melosira sp. (21.69%). Indeks Keanekaragaman terrendah pada Stasiun 2 (H’= 2.217) dan tertinggi pada stasiun 3 (H’= 2.284). Hal ini menunjukkan bahwa secara keseluruhan perairan ini memiliki nilai keanekaragaman sedang. Indeks Keseragaman terrendah pada Stasiun 1  (e= 0.858) dan tertinggi pada Stasiun 2  (e= 0.924). Hal ini menunjukkan bahwa secara keseluruhan perairan ini memiliki nilai keseragaman  sedang. Indeks Dominansi terrendah pada Stasiun 3 (C= 0.119) dan yang tertinggi pada Stasiun 1 (C= 0.127). Hal ini menunjukkan bahwa tidak ada jenis yang mendominasi perairan. Adapun kondisi perairannya seperti suhu, salinitas, pH dan kecerahan masih menunjang pertumbuhan fitoplankton.Kata Kunci :Fitoplankton, Struktur Komunitas, Lamun, Tongkeina,

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