The Variability in Population Structure of Gastropods in Sedati Waters, Sidoarjo Regency, East Java

Fadliyah, Siti; Sari, Luthfiana Aprilianita; Pursetyo, Kustiawan Tri; Zein, A.; Idris, Mushrifah; Cahyoko, Yudi

doi:10.1088/1755-1315/679/1/012074

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…The observed variables were temperature (Thermometer Hg), current velocity (Current Meter Tatonas Tipe TH-02. ), pH (pH meter Krisbow Type KW 06-744), transparency (Secchi disc, Fadliyah et al 2021), salinity (Refractometer Atago Tipe PAL-06S), and dissolved oxygen (DO Meter Lutron DO-5509). In addition, the analysis of chlorophyll-a, nitrate, and orthophosphate used Spectrophotometer Genesys 10 UV-Vis.…”

Section: Measurement Of Water Quality Parametersmentioning

confidence: 99%

Microalgae diversity in varying habitat characteristics in Pasuruan and Sidoarjo coastal areas, East Java, Indonesia

MAHMUDI,

ARSAD,

FITRIANESIA

et al. 2023

Biodiversitas

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Abstract. Mahmudi M, Arsad S, Fitrianesia F, Ramadhan SF, Arif AR, Savitri FR, Dewinta AA, Ongkosongo AD, Musa M, Lusiana ED. 2023. Microalgae diversity in varying habitat characteristics in Pasuruan and Sidoarjo coastal areas, East Java, Indonesia. Biodiversitas 24: 4418-4426. Microalgae are microscopic eukaryotic organisms which live in various types of habitats. The purpose of this study was to identify the types and the abundance of microalgae in several sub-habitats, namely sediments, mangroves, water columns, and artificial substrates; and to analyze the environmental factors that affect the abundance of microalgae. The research was conducted in several sites in the coastal areas in Pasuruan and Sidoarjo, East Java, Indonesia. A quantitative descriptive method was applied with data collection used a purposive sampling method. Samples were collected using net for planktonic microalgae and using sampling plot for epiphytic and benthic microalgae. The microalgae were grouped using NMDS (non-metric multidimensional scaling) and the relationships between microalgae abundance and water quality parameters were analyzed using CCA (canonical correspondence analysis). The results show that Bacillariophyceae, Cyanophyceae, and Chlorophyceae classes were found in all study sites, but Trebouxiophyceae and Dinophyceae were only found in Pasuruan Beach. The highest abundance of microalgae was found in sediment habitat in Wughoyo Beach, Sidoarjo with 706,605 ind. cm-2. The diversity, the evenness, and the dominance index in both coastal areas ranged from 1.43-2.61; 0.71-0.96; and 0.06-0.27, respectively. Similarity analysis using the NMDS showed that there was no similarity among the three sites, suggesting each site had high microalgal variation. The CCA analysis showed that Bacillariophyceae were found in all sites, indicating its high adaptability. The results of this analysis imply that particular habitat has a unique microalgae diversity, thus preserving diverse habitat types is important.

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Section: Measurement Of Water Quality Parametersmentioning

confidence: 99%

Microalgae diversity in varying habitat characteristics in Pasuruan and Sidoarjo coastal areas, East Java, Indonesia

MAHMUDI,

ARSAD,

FITRIANESIA

et al. 2023

Biodiversitas

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“…Gastropods are a highly diverse group of mollusks having single-valve, soft bodies protected by shells (Brown and Lydeard 2010). The gastropods are highly abundant in marine, terrestrial, and freshwater and the gastropods' tolerance to environmental influences determine how gastropods are distributed in the marine environment (Fadliyah et al 2021). The mangrove ecosystem provides suitable habitat characteristics with nutrients or organic matter for marine gastropods and other molluscan shells where it dominates (Kabir et al 2014;Baderan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Diversity of Harvested Gastropods in Guang-Guang, Mati City, Davao Oriental, Philippines

Maynawang,

Macusi,

Fadli

et al. 2023

HAYATI J Biosci

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Gastropods are a highly abundant group of mollusks in the marine environment. Marine gastropods primarily function as prey for other animals, grazers which help recycle nutrients and increase bioturbation activities in the marine ecosystem. Edible gastropods are significant to the economy of coastal communities. However, overexploitation leads to harming the population of marine gastropods. The study aimed to determine the diversity of gastropods harvested at Guang-guang, Mati City, Davao Oriental. It also assessed the abundance of the identified gastropods in the area. This study used purposive sampling to enroll gleaners (N = 30) who collected shells and monitored their gastropod harvest. The harvested gastropods were segregated, counted, and identified with the help of gleaners. A total of ten gastropod species were identified from the family of Strombidae, Conidae, Neritidae, Cypraeidae, and Turbinidae. The most abundant group after harvest was Canarium urceus, with a relative abundance of 67%, followed by Ilyanassa obsoleta, with 22%. However, the least harvested species was Nerita, with a relative abundance of 0.18%. The findings revealed that the harvested gastropods in Guang-guang have a diversity index of 0.99, indicating a low diversity of gastropods in the area. This low diversity could mean the area experienced overexploitation through time as gleaners have heavily harvested gastropods. With that, it is highly recommended that conservation should be prioritized to preserve the seashells.

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The Variability in Population Structure of Gastropods in Sedati Waters, Sidoarjo Regency, East Java

Cited by 2 publications

References 4 publications

Microalgae diversity in varying habitat characteristics in Pasuruan and Sidoarjo coastal areas, East Java, Indonesia

Microalgae diversity in varying habitat characteristics in Pasuruan and Sidoarjo coastal areas, East Java, Indonesia

Diversity of Harvested Gastropods in Guang-Guang, Mati City, Davao Oriental, Philippines

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