scholarly journals The Prediction of Plankton Diversity and Abundance in Mangrove Ecosystem

Omni-Akuatika ◽  
2020 ◽  
Vol 16 (3) ◽  
pp. 1
Author(s):  
Endang Hilmi ◽  
Lilik Kartika Sari ◽  
Amron Amron
Keyword(s):  
Negative Impact ◽  
Mangrove Ecosystem ◽  
High Density ◽  
Zooplankton Abundance ◽  
Phytoplankton Abundance ◽  
Filtering Method ◽  
Modelling Analysis ◽  
Abundance And Diversity ◽  
Plankton Diversity ◽  
Mangrove Degradation

The abundance of phytoplankton and zooplankton have correlation with mangrove conditions in coastal area. The mangrove degradation give negative impact for abundance and diversity phytoplankton and zooplankton. The research aimed to analysis and construct prediction model of abundance and biodiversity of phytoplankton and zooplankton in mangrove ecosystem. The research used the transect method (to determine mangrove density), filtering method (to analyze abundance of phytoplankton and zoopankton) and statistical method (to develop estimation modeling of plankton abundance). The results showed that (1) the mangrove density between 250 trees/Ha - 1250 trees/Ha (2) the phytoplankton abundance were 10.675 Indv/L (in mangrove rarely) - 24.290 indv/ L (in mangrove high density), (3) the zooplankton abundance were 261 Indv/L (in mangrove rarely) -  2.204 indv/L (in mangrove high density) (4) The modelling analysis showed that (1) the phytoplankton abundance (y) = 0.0303 x2 - 22.059 x + 13004 and (2) the zooplankton abundance (y) = 0.0057x2 – 5.39 x + 1458.2, with x = mangrove densityKeywords: phytoplankton and zooplankton, mangrove density, abundance, estuary and lagoon

scholarly journals Analisis Hubungan Kelimpahan Plankton di Permukaan Terhadap Hasil Tangkapan Ikan Lemuru (Sardinella lemuru) di Selat Bali

2017 ◽  
Vol 4 (1) ◽  
pp. 151
Author(s):  
Hasanuddin Parulian Sihombing ◽  
I Gede Hendrawan ◽  
Yulianto Suteja
Keyword(s):  
Sampling Method ◽  
Strong Relationship ◽  
Zooplankton Abundance ◽  
Sampling Point ◽  
Water Sampling ◽  
Phytoplankton Abundance ◽  
Fish Food ◽  
Area Sampling ◽  
The Relationship

Lemuru fish is one of fishery commodity that has high economical value and one of fish that most catched by fisherman in Bali Strait. Lemuru fish had been caught in Bali Strait was fluctuating every month and every years. This condition was related with food source of Lemuru fish such as phytoplankton and zooplankton. So this research was conducted to explained the relationship phytoplankton and zooplankton abundance with Lemuru fish catched  in Bali strait. This study focus in Bali strait during March until May 2017. Determination of sampling point used area sampling method while water sampling occured in surface water with pouring method. Total of phytoplankton and zooplankton abundance in Bali strait in March until May had formed the sinusoidal model with their abundance ranged 301 ind/L – 604 ind/L and 7 ind/L – 12 ind/L. Plankton abundance in Bali strait in March until May (transisonal season 1) was categorized low abundance if compared with plankton abundance in another season. The low value of phytoplankton abundance caused by non upwelling phenomenon and grazing process and the low abundance of zooplankton caused by low rate of zooplankton and predation by Lemuru fish. Phytoplankton and zooplankton abundance had  strong relationship with Lemuru fish catched with correlation coefficient value 0.76 and 0.69. This condition caused by phytoplankton and zooplankton are source of Lemuru fish food.

scholarly journals The diversity of plankton as bioindicators in Kakap River Estuary, West Kalimantan

DEPIK ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 174-179
Author(s):  
Widadi Padmarsari Soetignya ◽  
Patrisia Marniati ◽  
Mardan Adijaya ◽  
Yunita Magrima Anzani
Keyword(s):  
Relative Abundance ◽  
Environmental Changes ◽  
Diversity Index ◽  
River Estuary ◽  
West Kalimantan ◽  
Abundance And Diversity ◽  
Index Value ◽  
Plankton Diversity ◽  
Research Period

Kakap River Estuary plays an essential role in the life organisms, but it is vulnerable to environmental changes and pollution caused by human activities. This study aims to assess the presence of plankton species, their abundance and diversity as aquatic ecological bio-indicators in Kakap River Estuary. Plankton and water samples were taken for three months, with a frequency of one sample per month, viz. in March, April and June 2020 from four sampling stations in Kakap River Estuary, West Kalimantan. A total of 34 species of plankton were observed from all sampling sites, and identified to belong to 18 classes. Chlorophyceae had the highest relative abundance among the phytoplanktons (40.10%), followed by Bacillariophyceae (21.86%) and Cyanophyceae (19.28%). Oscillatoria sp. and Hydrodictyon sp. were the most dominant phytoplankton species. There were 8 classes of zooplankton identified from all sampling stations throughout the research period. Hexanauplia had the highest relative abundance among the zooplanktons (36.56%) followed by Euglenophyceae (24.37%). The plankton diversity index (H ′) values ranged between 2.33 -3.11. The plankton evenness index value ranged from 0.79 to 0.89 which indicates high plankton evenness at all samping stations, and this is supported by a low dominance index value at all stations ranging from 0.06-0.16. Station 1 had high Shannon-Wienner diversity index score, while for station 2, 3, 4, their scores were in the moderate level. Overall. the diversity index of the plankton from all sampling sites indicated that the quality of the water had no pollution to light pollution level.Keywords:PhytoplanktonZooplanktonWater quality

scholarly journals Reducing Native Ant Abundance Decreases Predation Rates in Midwestern Grasslands

2019 ◽  
Vol 48 (6) ◽  
pp. 1360-1368
Author(s):  
B D Wills ◽  
T N Kim ◽  
A F Fox ◽  
C Gratton ◽  
D A Landis
Keyword(s):  
Significant Role ◽  
Negative Impact ◽  
Common Garden ◽  
Agricultural Landscapes ◽  
Natural Prey ◽  
Significant Negative Impact ◽  
Predator Abundance ◽  
Abundance And Diversity ◽  
Lasius Neoniger ◽  
Predation Rates

Abstract Diverse and robust predator communities are important for effective prey suppression in natural and managed communities. Ants are ubiquitous components of terrestrial systems but their contributions to natural prey suppression is relatively understudied in temperate regions. Growing evidence suggests that ants can play a significant role in the removal of insect prey within grasslands, but their impact is difficult to separate from that of nonant predators. To test how ants may contribute to prey suppression in grasslands, we used poison baits (with physical exclosures) to selectively reduce the ant population in common garden settings, then tracked ant and nonant ground predator abundance and diversity, and removal of sentinel egg prey for 7 wk. We found that poison baits reduced ant abundance without a significant negative impact on abundance of nonant ground predators, and that a reduction in ant abundance decreased the proportion of sentinel prey eggs removed. Even a modest decrease (~20%) in abundance of several ant species, including the numerically dominant Lasius neoniger Emery (Hymenoptera: Formicidae), significantly reduced sentinel prey removal rates. Our results suggest that ants disproportionately contribute to ground-based predation of arthropod prey in grasslands. Changes in the amount of grasslands on the landscape and its management may have important implications for ant prevalence and natural prey suppression services in agricultural landscapes.

MONITORING OF ENTOMOСOMPLEXES OF SOFT SPRING WHEAT IN THE FOREST-STEPPE OF SAMARA AREA

2016 ◽  
Vol 1 (4) ◽  
pp. 3-9
Author(s):  
Каплин ◽  
Vladimir Kaplin
Keyword(s):  
Seedling Growth ◽  
Spring Wheat ◽  
Negative Impact ◽  
Stem Elongation ◽  
High Density ◽  
Forest Steppe ◽  
Cereal Aphids ◽  
Competitive Relations ◽  
Hippodamia Variegata ◽  
Pre Treatment

The purpose of research is creation of conditions for the formation of self-regulating entomocomplexes in agrocenoses with a significant competitive relations in the cultivation of spring wheat in the non-use of insecticides against pests. Insects was collected with an entomological net for 25-50 flaps in triple repeated in period of vegetation of wheat. In the conditions of the non-use of insecticides of entomokomplexes included insects-phytophagous which are potential vectors of viruses, phytoplasmas; suctorial and gnawing phytofagous; insects are developing inwardly wheat stems; entomophagous. Entomophagous regulating the density of phytophagous were represented by predators and parasites. In 2013-2016 Phyllotreta vittula, Oscinella pusilla, O. frit had a high density in the stage of seedling growth, Haplothrips tritici – in the stage of stem elongation of spring wheat. Against pests of seedlings in terms of their high density recommended for pre-treatment of seeds of spring wheat before sowing by system insecticide Cruiser, KC, without a negative impact on useful entomofauna of the agro-ecosystems. To the head emergence stage of spring wheat and the beginning of oviposition of Haplothrips tritici, its population was effectively reduced by Aeolothrips pascidutus. Development of cereal aphids was annualy kept Hippodamia variegata (Coccinellidae).

scholarly journals Perluasan Hutan Mangrove dalam Mitigasi Risiko Bencana Pemanasan Global: Kegiatan PkM di Kawasan Pesisir Muara Angke Jakarta

2021 ◽  
Vol 5 (6) ◽  
pp. 1380-1388
Author(s):  
Rukaesih A. Maolani ◽  
Achmad Sudiyar Dalimunthe ◽  
Dwi Haryanto ◽  
Rivo Bifa ◽  
Putri Azzahra ◽  
...  
Keyword(s):  
Global Warming ◽  
Community Service ◽  
Coastal Area ◽  
Negative Impact ◽  
Mangrove Ecosystem ◽  
Human Beings ◽  
Service Program ◽  
Living Things ◽  
Mangrove Seedlings ◽  
World Environment

One of the disasters caused by humans is global warming. Global warming is a big problem that is being faced by all human beings and living things on earth. One of the activities that can be carried out in mitigating the risk of global warming is through Mangrove Ecosystem Rehabilitation. The existence of the Mangrove ecosystem in the coastal area of ​​DKI Jakarta Province is currently experiencing a decline in line with the development that changes the function of the area from a protected function to a cultivation function. One area that has experienced this is the coastal area in Muara Angke which has had a negative impact on the environment, namely the function of protecting and securing the coast will naturally be lost. In this 2021 Community Service program, STMA Trisakti has participated in helping to solve the problem of the rate of degradation of the Mangrove Forest by planting 1000 mangrove seedlings in the Muara Angke Eco-tourism area. The planting was carried out on World Environment Day on 5 June 2021.

scholarly journals Density Dynamics and Plankton Diversity in Pond with Different Bases at Faculty of Fisheries and Marine Education Pond

2020 ◽  
Vol 9 (3) ◽  
pp. 127
Author(s):  
Sukrismiati Sukrismiati ◽  
Endang Dewi Masithah ◽  
Sudarno Sudarno
Keyword(s):  
Research Method ◽  
Nutrient Content ◽  
Total Density ◽  
Phytoplankton Abundance ◽  
Marine Education ◽  
Density Dynamics ◽  
Chemical Conditions ◽  
Plankton Diversity

The availability of plankton in the waters is influenced by nutrient content, and the waters physics-chemical conditions. The higher the nutrient content in a waters, the higher phytoplankton abundance in the waters will be.This research is conducted at faculty of fisheries and marine education pond Airlangga University. It is aimed to density dynamics and plankton diversity in pond with different bases. This research method uses survey method.The reseach results shows that the highest density in tarpaulin pond is located at point four on the first day that reaches 1,822,000 ind/l, The highest total density on the ground pools is got on first day on the first point of 245,000 ind/l.

scholarly journals STRUKTURKOMUNITAS PLANKTONDANKONDISI LINGKUNGAN PERAIRANDITELUKJAKARTA

2016 ◽  
Vol 5 (3) ◽  
pp. 131
Author(s):  
Adriani Sri Nastiti ◽  
Sri Turni Hartati
Keyword(s):  
Water Temperature ◽  
Fish Growth ◽  
Natural Food ◽  
Aquatic Environments ◽  
Zooplankton Abundance ◽  
Phytoplankton Abundance ◽  
Biological Index ◽  
Environmental Pressures ◽  
Marine Life ◽  
Fish Resources

<p>Fitoplankton dan zooplankton merupakan pakan alami bagi biota laut termasuk ikan. Tujuan penelitian adalah mengetahui struktur komunitas fitoplankton dan zooplankton serta kondisi lingkungan perairan di Teluk Jakarta.<strong> </strong>Penelitian dilakukan pada bulan April, Juni, Agustus dan Oktober 2009, pengamatan di 5 stasiun TJ1, TJ2, TJ3, TJ4 dan TJ5. Parameter yang di ukur adalah: kelimpahan fitoplankton dan zooplankton, suhu air, kecerahan, oksigen terlarut, pH, salinitas,. Hasil penelitian menunjukkan bahwa fitoplankton yang ditemukan 5 kelas meliputi: Cyanophyceae (6 spesies), Chlorophyceae (4 spesies), Bacillariophyceae (37 spesies), Dinophyceae (14 spesies) dan Euglenophyceae (1 species). Zooplankton yang ditemukan 10 kelas meliputi : Crustacea (16 spesies), Holothuroidea (3 spesies), Ciliata (5 spesies), Sagittoidea (2 spesies), Sarcodina (3 spesies), Rotatoria (4 spesies), Echinodermata (1 spesies), Polychaeta (1 spesies), Urochordata (1 spesies) dan Hydrozoa (1 spesies). Kelimpahan fitoplankton berkisar antara 1.587.086 - 3.799.799 sel/l. Kelimpahan zooplankton berkisar antara 922.010 - 3.834.261ind/l. Indeks keanekaragaman (=H)  fitoplankton berkisar antara 1,74 – 3,64;indeks dominansi (=D) berkisar antara 0,04-0,40 dan indeks keseragaman (=E) berkisar antara 0,08-0,34. Indeks  biologi zooplankton menunjukkan nilai (=H) berkisar antara 0,22-3,70; nilai  (=D) berkisar antara 0,18-0,79; dan nilai (=E) berkisar antara 0,01-0,37.  Suhu air berkisar  antara 29,5-31,6<sup>o</sup>C, pH berkisar antara 4,96-7,38 dan salinitas berkisar antara 12,0-31,5 <sup>o</sup>/<sub>oo. </sub>Teluk Jakarta diindikasikan mengalami tekanan lingkungan sehingga hanya beberapa spesies plankton mampu beradaptasi, yaitu dari kelas Bacillariophyceae (<em>Chaetoceros </em>sp) dan Crustaceae<em> (Calanus</em> sp dan <em>Acartia </em>sp<em>)</em>.</p><p> <em>Phytoplankton and zooplankton is a natural food for other marine life including fish. Growth and development are supported by condition of aquatic environment. The research objective was to determine the community structure of phytoplankton and zooplankton and aquatic environments as a factor in supporting the management of fish resources in the  Jakarta Bay. The research was conducted in April, June, August and October 2009 at five stations were : TJ1, TJ2, TJ3, TJ4 and J5 . The parameters measured were: phytoplankton and zooplankton abundance, water temperature, brightness, dissolved oxygen, pH and salinity,. The results show that there were 5 classes of phytoplankton found in Jakarta Bay consisting  of: Cyanophyceae (6 species), Chlorophyceae (4 species), Bacillariophyceae (37 species), Dinophyceae (14 species)and Euglenophyceae (1 species). Zooplankton were found  10 classes consisting of</em> <em>Crustacea (16 species), Holothuroidea (3 species), Ciliata (5 species), Sagittoidea (2 species), Sarcodina (3 species), Rotatoria (4 species), Echinodermata (1 species), Polychaeta (1 species), Urochordata (1 species) dan Hydrozoa (1 species). Phytoplankton abundance was between 1.922.010 - 3.834.261 cell/ l</em>. <em>Zooplankton abundance was between 2.764 - 2.849.066</em> <em>ind/l.  Analysis on biological index of phytoplankton showed that the diversity indeces ranged between</em><em> 1,74 – 3,64;  dominance indeces (=D) ranged  between 0,04-0,40 and  similarity indeces (=E) ranged between 0,08- 0,34.  Biological index of zooplankton showed that the diversity indeces (= H) ranged between 0,22-3,70;  dominance indeces (=D) ranged  between 0,18-0,79, and similarity indeces (= E) ranged between 0,01-0,37</em>.<em> Water temperature ranged between 29.5 - 31.6<sup>o </sup>C, pH  ranged between  4.96 - 7.38 and salinity ranged between 12.0 - 31.5 <sup>o</sup> / <sub>oo</sub> . Jakarta Bay is experienced environmental pressures so that only several species plankton are capable of adapting, that is from class Bacillariophyceae (Chaetoceros </em>sp.<em>) and  class Crustaceae (Calanus</em> sp. <em>and</em> <em>Acartia </em>sp<em>)</em><em>.</em></p>

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