scholarly journals Struktur Komunitas Echinodermata pada Berbagai Tipe Habitat di Daerah Intertidal Pantai Lakeba, Kota Baubau Sulawesi Tenggara

2021 ◽  
Vol 24 (3) ◽  
pp. 333-342
Author(s):  
WD. Syarni Tala ◽  
Kusrini Kusrini ◽  
Jumiati Jumiati
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Distribution Pattern ◽  
Dominant Species ◽  
Species Evenness ◽  
Intertidal Area ◽  
Habitat Types ◽  
Economic Values ◽  
Holothuria Scabra ◽  
Stichopus Horrens

Echinoderms are one of organisms that inhabit intertidal areas which have important ecological roles in marine ecosystems, also have high economic values. The community structure and distribution pattern of Echinoderms in the intertidal area can provide an overview of the condition of the Echinoderm community. This research aims to determine the community structure of Echinoderms in various habitat types in the intertidal areas of Lakeba Beach, Baubau Town. The community structure of Echinoderms were observed using quadratic transec method. Echinoderms found were 777 individuals consisting of 18 species from 5 classes. Echinoderms were distributed in four habitat types, i. e. sandy, sand covered with seagrass, rocky, and rock covered with algae habitats. The highest abundance of Echinoderm was Ophiocoma scolopendrina (Ophiuroidea) and the lowest were Maretia planulata, Arachnoides placenta (Echinoidea), Holothuria scabra, H. leucospilota, Stichopus horrens (Holothuroidea), and Isocrinidae (Crinoidea). The species diversity of Echinoderms was categorized as moderate (H’ = 1,42180), species evenness was moderate (E = 0,49191), and no dominant species of Echinoderm community (D = 0,36601). Echinoderm community living in the intertidal area was influenced by antropogenic factors.  Echinodermata merupakan salah satu organisme yang mendiami daerah intertidal yang memiliki peran ekologis penting bagi ekosistem laut, juga memiliki nilai ekonomis yang tinggi. Struktur komunitas dan pola distribusi Echinodermata pada daerah intertidal dapat memberikan gambaran mengenai kondisi komunitas Echinodermata. Penelitian ini bertujuan untuk mengetahui struktur komunitas dan pola distribusi Echinodermata di daerah intertidal Pantai Lakeba, Kota Baubau. Struktur komunitas dan pola distribusi Echinodermata diamati menggunakan metode transek kuadrat. Echinodermata yang ditemukan berjumlah 777 individu yang terdiri atas 18 jenis dari 5 kelas. Echinodermata terdistribusi pada empat tipe habitat yaitu habitat pasir, pasir yang ditutupi lamun, batu, dan batu yang ditutupi alga. Echinodermata yang memiliki kelimpahan tertinggi adalah Ophiocoma scolopendrina (Ophiuroidea) dan kelimpahan terendah adalah Maretia planulata, Arachnoides placenta (Echinoidea), Holothuria scabra, H. leucospilota, Stichopus horrens (Holothuroidea), dan Isocrinidae (Crinoidea). Keanekaragaman jenis Echinodermata dikategorikan sedang (H’ = 1,42180), kemerataan jenis sedang (E = 0,49191) dan tidak ada jenis yang dominan dalam komunitas Echinodermata (D = 0,36601). Komunitas Echinodermata yang hidup di daerah intertidal pantai dipengaruhi oleh faktor antropogenik.

Diversity and community structure of Ephemeroptera in freshwater stream of Megamalai hills, Tamil Nadu, India

ENTOMON ◽  
2021 ◽  
Vol 46 (4) ◽  
pp. 279-284
Author(s):  
S. Barathy ◽  
T. Sivaruban ◽  
Srinivasan Pandiarajan ◽  
Isack Rajasekaran ◽  
M. Bernath Rosi
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Air Temperature ◽  
Tamil Nadu ◽  
Dominant Species ◽  
Diversity Indices ◽  
Low Diversity ◽  
Freshwater Stream ◽  
Species Diversity Indices ◽  
High Diversity

In the study on the diversity and community structure of Ephemeroptera in the freshwater stream of Chinnasuruli falls on Megamalai hills, a total of 523 specimens belonging to thirteen genera and five families were collected in six month periods. Of the five families, Teloganodidae and Leptophlebiidae exhibited high diversity and Caenidae showed low diversity. Choroterpes alagarensis (Leptophlebiidae) is the most dominant species. Diversity indices such as Shannon and Simpson indices showed that diversity was maximum in November and December and it was minimum in August and January. Canonical Correspondence Analysis revealed that rainfall, water flow, turbidity, and air temperature were the major stressors in affecting the Ephemeropteran community structure.

scholarly journals Temporal Distribution of Gastropods In Rocky Intertidal Area In North Manokwari, West Papua

2019 ◽  
pp. 1
Author(s):  
Dandi Saleky ◽  
Simon P.O Leatemia ◽  
Yuanike Yuanike ◽  
Irman Rumengan ◽  
I Nyoman Giri Putra
Keyword(s):  
Community Structure ◽  
Distribution Pattern ◽  
Similarity Index ◽  
Temporal Distribution ◽  
Population History ◽  
Rocky Intertidal ◽  
Systematic Sampling ◽  
Intertidal Area ◽  
Ecological Features ◽  
West Papua

Gastropods is an important organism that commonly found inhabiting the rocky intertidal area. Distribution pattern of this species is influenced by various factors such as population history, microhabitat, predation and a complex interactions between oceanographic dynamics and ecological features. This study aims to compare the temporal distribution pattern of gastropods at two different rocky intertidal area. This research was conducted at the rocky intertidal area of Amban and Nuni, North Manokwari District, West Papua. Data collection was performed during the daylight and night in April and June 2012 using systematic sampling method. The results showed that both physical and chemical factors are suite for supporting gastropods life. Furthermore, these factors seem to have an impact on gastropod zoning patterns observed in the study area. The similarity index values ​​indicate that the similarity of gastropod species between the two locations is low, which means that the species of gastropods found in each location is quite different. The community structure of gastropod at the study area is stable. In addition, we found that the gastropods diversity were higher during the night than the daylight because gastropods are classified as a nocturnal animals. Key Words: Gastropod; Rocky Intertidal; Community Structure; Nocturnal

scholarly journals Diversity of Hoverfly (Diptera: Syrphidae) Communities in Different Habitat Types in Zanjan Province, Iran

ISRN Zoology ◽  
2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Masumeh Naderloo ◽  
Shahrokh Pashaei Rad
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Rice Field ◽  
Diversity Analysis ◽  
Species Evenness ◽  
Habitat Types

The diversity of hoverfly communities was studied in four different habitat types (river side, woodland, fruit garden, and rice field) in the years of 2008 and 2009. Adult hoverflies were collected from different habitants in Zanjan province. A total of 31 species with 750 individuals of hoverflies were collected, among which Sphaerophoria scripta (Linnaeus), Eristalis arbustorum (Linnaeus) and Eristalis tenax (Linnaeus) were found to be the most abundant. Records from these four sites were used in the diversity analysis. The results indicated that river side and rice field showed the highest and lowest degree of species richness and species diversity. Also, river side and rice field showed the highest and lowest species evenness, respectively.

Species diversity, community structure and distribution of phytoplankton in the Changjiang estuary during dry and flood periods

2013 ◽  
Vol 94 (3) ◽  
pp. 459-472 ◽  
Author(s):  
P.Y. Guo ◽  
H.T. Shen ◽  
J.H. Wang
Keyword(s):  
Surface Layer ◽  
Community Structure ◽  
Species Diversity ◽  
Species Distribution ◽  
Dominant Species ◽  
Changjiang Estuary ◽  
Freshwater Species ◽  
Phytoplankton Species ◽  
Dry Period ◽  
Flood Period

This paper reports on the phytoplankton community, its composition, structure and distribution in Changjiang estuary from February 1999 to March 2000. Two hundred and eight species were identified in the dry and flood periods. Diatoms, with 143 species observed, was the most abundant phytoplankton group, accounting for 68.75% of the total phytoplankton species number. Skeletonema costatum was dominant among all the species. The phytoplankton of Changjiang estuary in China was divided into five ecological categories: freshwater species, estuary brackish water species, inshore low salinity species, inshore widespread species and off-sea high salinity species. During the dry period, the major phytoplankton populations in the surface layer were estuary inshore and offshore populations, distinguished from the composition of the bottom layer. The community structure was similar in the two layers during the flood period. The phytoplankton species diversity was calculated for Simpson, Shannon–Weaver diversity and evenness indices, and found to be higher in the dry period, due to the simple dominant species and low spatial heterogeneity in the flood period. Higher phytoplankton abundance was observed in the surface layer during the flood period. The phytoplankton species distribution, coinciding with the dominant species distribution, varied with salinity, and their abundance correlated significantly with nutrients and light.

scholarly journals Struktur Komunitas Semut (Hymenoptera : Formicidae) di Lahan Pertanian Organik dan Anorganik Desa Batur, Kecamatan Getasan, Kabupaten Semarang

2018 ◽  
Vol 19 (2) ◽  
pp. 170
Author(s):  
Ivan Mahadika Putra ◽  
Mochamad Hadi ◽  
Rully Rahadian
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Dominant Species ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Similarity Index ◽  
Terrestrial Ecosystems ◽  
Species Diversity Index ◽  
Ant Communities ◽  
Organic Farm

Ants play an important role in terrestrial ecosystems, including in organic and inorganic farmland, as predators, scavengers, and their interaction with other organism. The objectives of this study were to compare the community structure and the role of the ant in organic and inorganic farmland, and also to determine soil abiotic factors in both farmland. The study was conducted in organic and inorganic chili crop land at Batur village, Getasan, Semarang. The sampling of ants was performed using pitfall traps and bait traps, and then the ants were identified. Data analysis used is an abundance index, diversity index, evenness index, Hutchinson test and similarity index. The results showed that the number of species and the number of individual of ants in organic farm were higher (45 individuals, 8 species) than inorganic farm (35 individuals, 6 species). Diversity index of ant species in both farmlands were categorized moderate with the index value of 1.92 and 1.42. Statistically, there were no significant differences in species diversity of ants in organic and inorganic farmland. There were five dominant species in organic field and three dominant species in inorganic field. Ants that predominate in both farmlands were Iridomyrmexsp, Tetramorium sp, Solenopsisgeminata, Odontoponeradenticulata and Diacammasp. The similarity of ant communities between organic and inorganic farmland showed high value of similarity index (IS) which was 85.7%. Statistically, abiotic factors showed that there were significantly different of some abiotic factors in both farmlands, the content of carbon, phospor, organic matter and c / n ratio. Keywords: community structure of ants, agricultural ecosystems

scholarly journals Community Structure and Distribution Pattern of Intertidal Invertebrate Macrofauna at Some Anthropogenically Influenced Coasts of Kathiawar Peninsula (India)

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Poonam Bhadja ◽  
Paresh Poriya ◽  
Rahul Kundu
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Distribution Pattern ◽  
Human Activities ◽  
Present Report ◽  
Abiotic Factors ◽  
Climatic Conditions ◽  
High Species Diversity ◽  
Almost All ◽  
Different Levels

Present communication reports the community structure and distribution pattern of intertidal invertebrate macrofauna at four shores of the Kathiawar peninsular coastline off the Arabian Sea (India). The selected shores have different levels of human activities. Present report tests three hypotheses; that is, (i) distribution of invertebrate macrofauna in these shores is influenced by space and time, (ii) abiotic factors have a profound influence on the distribution pattern of intertidal macrofaunal assemblages, and (iii) human activities influence the community structure of the intertidal invertebrate macrofauna at these shores. To test these hypotheses, spatiotemporal variations in different ecological indices were studied. A total of 60 species from six phyla were considered for the study. High species diversity was recorded during winter and monsoon seasons in almost all the shores studied. It was also evident that a few environmental factors had a cumulative influence on the distribution pattern of intertidal macrofauna. Significant spatial variations in the species diversity and evenness were also observed. Though the shores studied have similar coast characteristics and climatic conditions, they face different levels of human activities. Therefore, the observed variations in the intertidal faunal assemblage were possibly caused by anthropogenic stress.

scholarly journals The STRUKTUR KOMUNITAS TERIPANG (Holothuroidea) DI PERAIRAN PANTAI DESA NAMTABUNG, KECAMATAN SELARU, KABUPATEN KEPULAUAN TANIMBAR

2021 ◽  
Vol 17 (1) ◽  
pp. 10-17
Author(s):  
Maria Matrutty ◽  
D Wakano ◽  
S Suriani
Keyword(s):  
Community Structure ◽  
Distribution Pattern ◽  
Coastal Waters ◽  
Sea Cucumber ◽  
Diversity Index ◽  
Relative Distribution ◽  
Stable Category ◽  
Holothuria Scabra ◽  
A Value ◽  
Holothuria Atra

Sea cucumber is an invertebrate which is widely used by the community as food and medicine. The purpose of this study is to analyze the community structure of sea cucumber (Holothuroidea) in the coastal waters of Namtabung Village, Selaru District, Tanimbar Islands Regency. The used method to collect sea cucumber samples was the linear quadratic transect method with the number of observation stations as many as three stations, the samples of sea cucumbers obtained will be identified using an identification book. The results showed that there were four species of sea cucumber from the Holothuridea family, genus Holothuria and Bohadschia with the types namely Holothuria scabra, Holothuria edulis, Holothuria atra, and Bohadschia marmorata. Holothuria scabra has the highest density of 0.202 ind / m2. The highest relative abundance was shown by Holothuria edulis at 28.12%. The type of diversity index value is 1.3662 which means moderate diversity, and the dominance index is 0.2533, which means that there are no dominant species. The relative distribution pattern is at ˃ 1, which means that the distribution pattern is clustered. The highest index of importance was Holothuria scabra with a value of 91.07%. Overall, the sea cucumber community structure in the coastal waters of Namtabung Village is in the stable category. The highest index of importance was Holothuria scabra with a value of 91.07%. Overall, the community structure of sea cucumber in the coastal waters of Namtabung Village is in the stable category.   ABSTRAK Teripang merupakan hewan tidak bertulang belakang yang banyak dimanfaatkan oleh masyarakat sebagai bahan pangan dan obat-obatan. Tujuan dari penelitian ini adalah menganalisis struktur komunitas teripang (Holothuroidea) di perairan pantai Desa Namtabung Kecamatan Selaru, Kabupaten Kepulauan Tanimbar. Metode yang digunakan untuk pengambilan sampe teripang adalah metode transek linear kuadrat dengan jumlah stasiun pengamatan sebanyak tiga stasiun, sampel teripang yang diperoleh akan diidentifikasi menggunakan buku identifikasi. Hasil penelitian menunjukan terdapat empat spesies teripang dari famili Holothuridea, genus Holothuria dan Bohadschia dengan jenis-jenis yaitu Holothuria scabra, Holothuria edulis, Holothuria atra, dan Bohadschia marmorata. Kepadatan tertinggi dimiliki oleh jenis Holothuria scabra sebesar 0,202 ind/m2. Kelimpahan relative tertinggi ditunjukkan oleh Holothuria edulis sebesar 28,12%. jenis Nilai indeks keanekaragaman sebesar 1,3662 yang artinya keanekaragaman sedang, dan indeks dominansi 0,2533 yang artinya tidak terdapat spesies yang mendominansi. Pola penyebaran relatif  berada pada angka ˃ 1 yang artinya pola sebaran bersifat mengelompok. Indeks nilai penting tertinggi adalah Holothuria scabra dengan nilai 91,07%. Secara keseluruhan, struktur komunitas teripang di daerah perairan pantai Desa Namtabung berada dalam kategori stabil.   Kata kunci: Struktur komunitas, teripang, indeks ekologi, Desa Namtabung, Maluku    

Dominant species can produce a negative relationship between species diversity and ecosystem function

Oikos ◽  
2009 ◽  
Vol 118 (5) ◽  
pp. 723-732 ◽  
Author(s):  
Robert P. Creed ◽  
Robert P. Cherry ◽  
James R. Pflaum ◽  
Chris J. Wood
Keyword(s):  
Species Diversity ◽  
Ecosystem Function ◽  
Dominant Species ◽  
Negative Relationship

scholarly journals Diversity and Community Structure of Oribatid Mites (Acari, Oribatei) at Memorial Complexes of a Megapolis

2013 ◽  
Vol 47 (4) ◽  
pp. 291-297
Author(s):  
L. A. Kolodochka ◽  
O. S. Shevchenko
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Species Complex ◽  
Common Species ◽  
Oribatid Mites ◽  
Direct Relation ◽  
City Center ◽  
Degree Of Dominance ◽  
Different Types ◽  
The City

Abstract In different types of substrate (soil, litter, lichens and mosses) collected at three memorial complexes (cemeteries) of Kyiv (Ukraine), 70 species from 57 genera, 34 families of oribatid mites were found. A few eurytopic species capable of tolerance to different types of pollution make up an essential part in each species complex. The species diversity and complexity of oribatid community structure at researched areas increased with distance from the city center. There was no direct relation between the degree of dominance of most common species and the cemetery’s relative remoteness from the center of the city.

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