Phytoplankton community as bioindicators in aquaculture media Tilapia (<i>Oreochromis niloticus</i>) exposed to detergent and pesticide waste

Phytoplankton is a bio-indicator of fertility in waters. This study aims to determine the impact of detergent and pesticide waste on the phytoplankton community structure in in tilapia aquaculture media. The phytoplankton identification stage was carried out at the MIPA Laboratory Almuslim University. The parameters studied were phytoplankton abundance, diversity index, uniformity index, dominance index, and water quality parameters. The results of this study showed that detergent and pesticide waste at the end of the study had caused a decrease in the abundance value of phytoplankton by 3,250 individual/L and 3,750 individual/L. In the control treatment, the highest phytoplankton composition was dominated by Chaetoceros sp., while the pesticide and detergent treatments were dominated by Golenkenia sp. and Microcystis sp. Exposure to detergent and pesticide waste reduced the diversity index value, the phytoplankton uniformity index value. At the beginning of the study, it has a moderate diversity index (H '= 2.485–3.072), while at the end of the study it shows low diversity (H' = 2.111–2.375). Furthermore, at the beginning and at the end of the study there was a decrease in the uniformity index value (E = 0.87–1.01) and (H '= 0.88–0.94).

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HUBUNGAN KONSENTRASI MINYAK DAN FENOL DENGAN KELIMPAHAN FITOPLANKTON DI SUNGAI ASEM BINATUR, KOTA PEKALONGAN

Management of Aquatic Resources Journal (MAQUARES) ◽

10.14710/marj.v6i1.19816 ◽

2018 ◽

Vol 6 (1) ◽

pp. 95-102

Author(s):

Mochammad Ardiansyah ◽

Agung Suryanto ◽

Haeruddin Haeruddin

Keyword(s):

Phytoplankton Community ◽

Diversity Index ◽

Middle Part ◽

Phenol Concentration ◽

Phytoplankton Community Structure ◽

Domestic Waste ◽

Central Java ◽

Trust Level ◽

Oil Concentration ◽

Index Value

ABSTRAKSungai Asem Binatur terletak di Kota Pekalongan, Jawa Tengah. Sungai ini selain menerima limbah domestik juga menjadi objek buangan limbah batik oleh para pelaku industri batik di daerahnya. Kandungan minyak dan fenol yang terdapat pada pembuatan batik ini mengalir menuju ke perairan sungai. Kandungan ini akan berdampak terhadap kelimpahan fitoplankton sebagai indikator kualitas perairan. Penelitian ini dilakukan pada bulan Juli – Agustus 2016 di Sungai Asem Binatur yang bertujuan untuk mengetahui konsentrasi minyak dan fenol, mengetahui kelimpahan dan struktur komunitas fitoplankton dan mengetahui hubungan antara minyak dan fenol dengan kelimpahan fitoplankton. Metode yang digunakan adalah metode survey. Teknik pengambilan sampel air di bagian tengah sungai selanjutnya dianalisis di laboratorium. Hasil penelitian menunjukkan konsentrasi minyak di lokasi penelitian berkisar antara 1,2 – 10,4 mg/l, sedangkan konsentrasi fenol berkisar antara 0,0005 – 1,167 mg/l. Kelimpahan fitoplankton berkisar antara 609 – 1649 ind/l, indeks keanekaragaman (H’) dengan nilai 1,894 – 2,484, indeks dominasi (d) diperoleh nilai 0,125 – 0,224, dan indeks keseragaman (e) dengan nilai 0,717 – 0,846. Tidak terdapat hubungan yang signifikan antara minyak dengan kelimpahan fitoplankton pada taraf kepercayaan 95% dengan nilai koefisien korelasi (r) sebesar 0,585 menunjukkan korelasi cukup. Sedangkan, terdapat hubungan yang signifikan antara fenol dengan kelimpahan fitoplankton dengan nilai korelasi (r) sebesar 0,861 menunjukkan korelasi kuat. Regresi linier berganda digunakan untuk membuktikan hubungan nyata antara minyak dan fenol dengan kelimpahan fitoplankton. Terdapat hubungan nyata dengan kelimpahan fitoplankton hanya pada konsentrasi fenol pada taraf kepercayaan 95% dengan nilai sig = 0,022, sedangkan konsentrasi minyak tidak terdapat hasil yang nyata sehingga dapat diabaikan dengan nilai sig = 0,809. Kata Kunci : Minyak; Fenol; Kelimpahan Fitoplankton; Limbah Batik; Sungai Asem Binatur. ABSTRACTAsem Binatur River is located in Pekalongan City, Central Java. Beside as an effluent of domestic waste, this river also an object to dump batik waste by batik industries nearby. Oil and phenol substance in these batik making flows into the river. These substance are going to cause an effect for the abundance of phytoplankton which is a water quality indicator. This research was done on July – August 2016 in Asem Binatur River and aimed to know oil and phenol substance, the abundance and phytoplankton community structure, also correlation of oil and phenol with the abundance of phytoplankton. Survey methode was used. Water sample which taken in the middle part of the river was analyzed. The result shown that oil concentration in the research location was around 1,2 – 10,4 mg/l, meanwhile phenol concentration was around 0,0005 – 1,167 mg/l. The abundance of phytoplankton was around 609 – 1649 ind/l, diversity index (H’) with 1,894 – 2,484 value, domination index value was 0,125 – 0,224, and uniformity index (e) with 0,717 – 0,846 value. There is no significant relation between oil and the abundance of phytoplankton at 95% trust level with correlation value (r) 0,585 which is an enough correlation. Meanwhile, there is a significant correlation between phenol and the abundance of phytoplankton with correlation value (r) 0,861 which is a strong correlation. Double linier regretion was used to prove real correlation between phenol and oil with the abundance of phytoplankton. There is a real correlation with the abundance of phytoplankton but only in phenol concentration at 95% trust level with sig value = 0,022 while oil concentration did not have real result and could be ignored with sig value = 0,809. Keywords: Oil; Phenol; The Abundance of Phytoplankton; Batik Waste; Asem Binatur River.

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

JURNAL PERIKANAN DAN KELAUTAN TROPIS ◽

10.35800/jpkt.10.2.2019.24478 ◽

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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The Dynamic of Phytoplankton Community Structure in Face of Warming Climate in A Tropical Man-Made Lake

Biosaintifika Journal of Biology & Biology Education ◽

10.15294/biosaintifika.v9i1.7725 ◽

2017 ◽

Vol 9 (1) ◽

pp. 140 ◽

Cited By ~ 1

Author(s):

Sunardi Sunardi ◽

Rina Febriani ◽

Budi Irawan ◽

Mutia Septi Saputri

Keyword(s):

Species Richness ◽

Community Structure ◽

Water Temperature ◽

Climate Warming ◽

Phytoplankton Community ◽

Diversity Index ◽

Freshwater Ecosystems ◽

Phytoplankton Community Structure ◽

And Function ◽

The Impact

<p>In freshwater ecosystems, water temperature plays as an environmental factor that regulates its structure and function. A research on the impacts of changes in temperature to the dynamics of the Phytoplankton community structure has been done. Data from nineteen-year period (1995 to 2013) were collected from Cirata Reservoir as an example of artificial tropical lake in Indonesia. The research aimed to determine the changes of water temperature as the impact of climate warming on the dynamics of phytoplankton community structure. Different measures such as species richness, diversity index, and abundance were measured in order to understand the changes of phytoplankton community structure. Trend analysis, linear regression, and correlation were applied to achieve our objective. The study revealed that changes in water temperature have affected the species richness, but not the diversity index and abundance of the phytoplankton. Bacilariophyceae and Cyanophyceae were found as two predominant phytoplankton classes in the lake with percentage of 48,45 and 41,43 respectively, assuming their capacity to adapt the new environment. This study suggests that climate warming implies changes of the freshwater ecosystems.</p>

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Dominansi dan Diversitas Lamun dan Makrozoobenthos pada Musim Pancaroba di Pantai Bama, Taman Nasional Baluran, Situbondo [Dominance and Diversity of Seagrass and Macrozoobenthos on Transition Season in Bama Beach, Baluran National Park, Situbondo]

Jurnal Ilmiah Perikanan dan Kelautan ◽

10.20473/jipk.v8i1.11191 ◽

2019 ◽

Vol 8 (1) ◽

pp. 36

Author(s):

Mohammad Faizal Ulkhaqa ◽

Sapto Andriyono ◽

Muhammad Hanif Azhara ◽

Hapsari Kenconojatia ◽

Daruti Dinda Nindarwi ◽

...

Keyword(s):

National Park ◽

Diversity Index ◽

Line Transect ◽

Dominance Index ◽

Transition Season ◽

A Value ◽

Low Diversity ◽

The One ◽

Index Value ◽

Dry And Rainy Seasons

AbstrakLamun merupakan tanaman berbiji terbuka yang mampu tumbuh dan beradaptasi dengan lingkungan bersalinitas tinggi serta dapat berasosiasi dengan benthos. Keberadaan lamun di perairan merupakan salah satu indikator tingkat kesuburan dan produktivitas perairan. Terdapat perbedaan dominansi antara musim hujan dan musim kemarau, sehingga enelitian ini bertujuan untuk mengidentifikasi dan menghitung dominansi dan keanekaragaman lamun dan makrozoobenthos pada musim pancaroba di Pantai Bama, TN Baluran, Situbondo. Metode penelitian yang digunakan yaitu line transect quadran dengan 5 line transek quadran yang masing-masingnya dipasang 5 plot transek. Ditemukan jenis lamun yang memiliki nilai kelimpahan tertinggi di Pantai Bama, TN Baluran pada musim pancaroba yaitu C. serrulata dengan nilai 48,90% , dan makrozoobenthos dari genus Holothuria dengan nilai 52,06%. Nilai Indeks dominansi (D) mengkategorikan Pantai Bama, TN Baluran dalam perairan dengan dominansi sedang. Sedangkan berdasarkan Indeks keanekaragaman (H’) mengkategorikan Pantai Bama, TN Baluran dalam perairan dengan keanekaragaman rendah. Musim peralihan berpengaruh terhadap jenis, kelimpahan relatif, indeks dominansi dan indeks keanekaragaman lamun dan makrozoobenthos di Pantai Bama, TN Baluran dibandingkan musim kemarau dan hujan. Perlu dilakukan survei secara berkala untuk mengetahui keanekaragaman organisme yang berkaitan dengan produktivitas perairan. AbstractSeagrass is the one of plants that can grow and adaptataion with high salinity environment and associated with benthos. Seagrass presence that indicate the productivity and prosperity in waters environtment. Found a different dominance between rainy season and dry season, so The aims of this study to identify and count dominance and diversity of seagrass and macrozoobenthos on the transition season in Bama Beach, TN Baluran, Situbondo. The method was used is line transect quadran with 5 quadran each of which installed 5 plot transect. Seagrass species was founded that have the highest abundance values in Bama Beach, TN Baluran the transitional season is C. serrulata with a value of 48.90%, and the macrozoobenthos that found from genus Holothuria with a value of 52.06%. Dominance index value (D) categorize Bama Beach, TN Baluran with moderate dominance. While based on the diversity index (H ') categorizes Bama Beach, TN Baluran with low diversity. Transitional seasons affect the type, relative abundance, dominance index and seagrass diversity index and macrozoobenthos in Bama Beach, TN Baluran than the dry and rainy seasons. Needed to investigate the diversity of organism that related to primary produktivity.

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Phytoplankton community structure in one sector of Guanabara Bay (RJ, Brazil) during 2011 and 2012

Brazilian Journal of Oceanography ◽

10.1590/s1679-87592015086506303 ◽

2015 ◽

Vol 63 (3) ◽

pp. 239-254 ◽

Cited By ~ 9

Author(s):

Katia Regina Vieira de Rezende ◽

Melissa Medeiros Ferreira Hatherly ◽

Cristiane Marques Monteiro Pimenta ◽

Janaina Eduardo ◽

Simone de Castro Vianna ◽

...

Keyword(s):

Surface Waters ◽

Phytoplankton Community ◽

Diversity Index ◽

Guanabara Bay ◽

Phytoplankton Community Structure ◽

Phytoplankton Abundance ◽

Phytoplankton Assemblages ◽

Cylindrotheca Closterium ◽

Population Structure Analysis ◽

Low Diversity

AbstractThis study analyzed the temporal variability of phytoplankton assemblages in the surface waters of Guanabara Bay (RJ, Brazil), at six stations in front of Icaraí Inlet from April/2011 to April/2012. Our results highlight the great contribution of diatoms, dinoflagellates and cyanobacteria, represented by 111 taxa typical of estuarine and coastal areas. The coexistence of benthic and planktonic species suggests considerable hydrodinamism in these waters. All variables were homogeneous (p > 0.05) between the stations, but differed between sampling periods. On average, phytoplankton abundance (107 cells.L-1) was higher than that of other estuaries and its temporal behavior was closely correlated (p < 0.01) with diatoms and cyanobacteria. The richness distribution pattern (7 to 27 taxa) was closely correlated (p < 0.01) with dinoflagellates and diatoms. Ninety per cent of all samples presented a low diversity index (< 2.0 bits.cell-1), which indicated the unstable balance of the system, typical of environments subjected to eutrophication. The population structure analysis revealed that 10% of all taxa were resident, 12% visitors and 78% accidental, suggesting the influence of continental and oceanic water influxes. Between the "typical" taxa, the most common were the cyanobacteria of the order Oscillatoriales, the diatoms Ceratoneis closterium (=Cylindrotheca closterium) and Leptocylindrus minimus and the dinoflagellate Prorocentrum triestinum.

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Response of ocean phytoplankton community structure to climate change over the 21st century: partitioning the effects of nutrients, temperature and light

Biogeosciences ◽

10.5194/bg-7-3941-2010 ◽

2010 ◽

Vol 7 (12) ◽

pp. 3941-3959 ◽

Cited By ~ 96

Author(s):

I. Marinov ◽

S. C. Doney ◽

I. D. Lima

Keyword(s):

Climate Change ◽

Community Structure ◽

Sea Ice ◽

Phytoplankton Biomass ◽

Phytoplankton Community ◽

Vertical Mixing ◽

Phytoplankton Community Structure ◽

Marginal Sea ◽

Small Phytoplankton ◽

The Impact

Abstract. The response of ocean phytoplankton community structure to climate change depends, among other factors, upon species competition for nutrients and light, as well as the increase in surface ocean temperature. We propose an analytical framework linking changes in nutrients, temperature and light with changes in phytoplankton growth rates, and we assess our theoretical considerations against model projections (1980–2100) from a global Earth System model. Our proposed "critical nutrient hypothesis" stipulates the existence of a critical nutrient threshold below (above) which a nutrient change will affect small phytoplankton biomass more (less) than diatom biomass, i.e. the phytoplankton with lower half-saturation coefficient K are influenced more strongly in low nutrient environments. This nutrient threshold broadly corresponds to 45° S and 45° N, poleward of which high vertical mixing and inefficient biology maintain higher surface nutrient concentrations and equatorward of which reduced vertical mixing and more efficient biology maintain lower surface nutrients. In the 45° S–45° N low nutrient region, decreases in limiting nutrients – associated with increased stratification under climate change – are predicted analytically to decrease more strongly the specific growth of small phytoplankton than the growth of diatoms. In high latitudes, the impact of nutrient decrease on phytoplankton biomass is more significant for diatoms than small phytoplankton, and contributes to diatom declines in the northern marginal sea ice and subpolar biomes. In the context of our model, climate driven increases in surface temperature and changes in light are predicted to have a stronger impact on small phytoplankton than on diatom biomass in all ocean domains. Our analytical predictions explain reasonably well the shifts in community structure under a modeled climate-warming scenario. Climate driven changes in nutrients, temperature and light have regionally varying and sometimes counterbalancing impacts on phytoplankton biomass and structure, with nutrients and temperature dominant in the 45° S–45° N band and light-temperature effects dominant in the marginal sea-ice and subpolar regions. As predicted, decreases in nutrients inside the 45° S–45° N "critical nutrient" band result in diatom biomass decreasing more than small phytoplankton biomass. Further stratification from global warming could result in geographical shifts in the "critical nutrient" threshold and additional changes in ecology.

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Effects of organic matter and time of incorporation on root development of tropical maize seedlings

Acta Agronomica Hungarica ◽

10.1556/aagr.56.2008.2.6 ◽

2008 ◽

Vol 56 (2) ◽

pp. 169-178

Author(s):

U. Sangakkara ◽

S. Nissanka ◽

P. Stamp

Keyword(s):

Organic Matter ◽

Root Growth ◽

Rice Straw ◽

Organic Materials ◽

Gliricidia Sepium ◽

Quality Parameters ◽

Control Treatment ◽

Poor Growth ◽

Time Of Application ◽

The Impact

Smallholders in the tropics add different organic materials to their crops at different times, based on the availability of materials and labour. However, the time of application could have an effect on the establishment and early growth of crops, especially their root systems, which has not yet been clearly identified. This paper presents the results of a study conducted under greenhouse conditions using soils from a field treated with three organic materials at 4 or 2 weeks before or at the planting of maize seeds, corresponding to the times that tropical smallholders apply these materials. The organic materials used were leaves of Gliricidia sepium and Tithonia diversifolia or rice straw, incorporated at a rate equivalent to 6 Mt ha −1 . A control treatment where no organic matter was added was used for comparison. The impact of the treatments on soil properties at the planting of maize seed and detailed root analysis based on root lengths were carried out until the last growth stage (V4). The addition of organic matter improved the soil characteristics, and the impact of adding Gliricidia leaves was most pronounced when incorporated 2 weeks before planting. The benefits of leaves of Tithonia or rice straw on soil quality parameters were clearly evident when added 4 weeks before planting. Organic matter enhanced the root number, root length, root growth rate and branching indices. All the organic materials suppressed the growth of maize roots when applied at planting, suggesting the existence of allelopathic effects, which could result in poor growth. The most benefits in terms of root growth were observed with Tithonia .

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Keragaman Plankton dan Kondisi Perairan Tambak Intensif dan Tradisional di Probolinggo Jawa Timur

Biosfera ◽

10.20884/1.mib.2015.32.2.299 ◽

2015 ◽

Vol 32 (2) ◽

pp. 83 ◽

Cited By ~ 3

Author(s):

Utojo Utojo

Keyword(s):

Suspended Solids ◽

Biological Diversity ◽

Diversity Index ◽

Cell Counting ◽

Community Stability ◽

Biological Index ◽

Dominance Index ◽

Lugol Solution ◽

Index Value ◽

Brackishwater Pond

This study aims to estimate the wealth and stability of traditional and intensive brackishwater pond waters through biological index calculation (diversity, uniformity and dominance of plankton) in traditional and intensive brackishwater pond waters of Probolinggo Regency, East Java Province. Sampling plankton and water from the site, considered to represent the diversity of plankton and water stability of traditional and intensive brackishwater pond. Plankton was collected using a plankton net no. 25, then preserved using 1% lugol solution. Measurement of water quality variables include temperature, salinity, dissolved oxygen and pH, whereas the laboratory analyzes that Total Organic Matter (TOM), NO2, NO3, NH3, PO4, Total Suspended Solids (TSS), and Fe. Plankton identification using microscope and calculation with cell counting method. The results of analysis of plankton in intensive brackishwater pond waters are obtained as much as 23 genera consisting of 16 genera of phytoplankton were included into three classes, namely Bacillariophyceae as much as 5 genera, Cyanophyceae 3 genera, Dinophyceae and Chlorophyceae, each of the four genera, whereas zooplankton consisting of 7 genera are included into two classes, namely Crustaceae 6 genera and Rotatoria 1 genus. In traditional brackishwater pond earned as much as 13 genera consisting of 8 genera of phytoplankton were included into Bacillariophyceae 5 genera, Cyanophyceae 2 genera, and Dinophyceae 3 genera, whereas zooplankton consisting of three genera are included into class Crustaceae 2 genera and Rotatoria 1 genus. Plankton abundance in intensive brackishwater pond ranges 702 - 4269 ind./L, diversity index of 0.26 -2.38, uniformity index of 0.10 - 1.5, and dominance index of 0.02 - 0.68. In traditional brackishwater pond have an abundance of plankton range 134 - 776 ind./L, diversity index of 0.10 - 1.97, uniformity index of 0.08 - 1.0, and dominance index of 0.01 - 0.75. Traditional and intensive brackishwater pond waters condition still within the limits that can be tolerated by the culture organism. Based on the index value of biological, diversity of genus in the intensive brackishwater pond is relatively higher than traditional brackishwater pond and the community stability moderate, whereas traditional brackishwater pond unstable. On average, the uniformity of the genus in both brackishwater ponds are relatively evenly and genus of plankton to dominate the others genus.

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Phytoplankton community structure in Menjer Lake, Central Java

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/869/1/012037 ◽

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.

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