scholarly journals Structural Diversity of Fish Assemblage in the Southern Sector of Main Outfall Drains northwest of Basrah, Iraq

2018 ◽  
Vol 31 (1) ◽  
pp. 1-11
Author(s):  
Abdul Hussein J. Abdullah ◽  
Rafaa A. Faris
Keyword(s):  
Fish Assemblage ◽  
Fish Community ◽  
Diversity Index ◽  
Structural Diversity ◽  
Marine Species ◽  
Inland Waters ◽  
Salinity Variation ◽  
Evenness Index ◽  
Richness Index ◽  
First Time

Fish assemblage was studied for a first time in the Southern part of Main Outfall Drain, in the Al-Kaii bridge region, northwest Basrah Iraq in the Al-Kaii bridge region. The study was conducted during the period from May 2016 to April 2017. Many types of fishing nets were used to collect the samples. Water temperature ranged from 14º  C in February 2017 to 30º  C in July and August 2016, while salinity ranged from   9 PSU in April 2017 to 42 PSU in December 2016. A total of 6161 individuals of fishes were caught represented 21 fish species. Six species were freshwaters fishes; four were alien species and 15 marine species. The species Acanthurus sohal was fished for the first time from the Iraqi inland waters. The most abundant three species were Poecillia latipinna, Planiliza subviridis and Thryssa whiteheadi formed 26.68%, 25.00% and 17.58%, respectively of the total number of samples. Values of the  diversity index varied from 1.23 in November to 2.17 in May, evenness index values fluctuated  between 0.52 in June to 0.88 in May, whereas richness index ranged from 1.14 in January 2017 to 2.02 in May. The present study concluded that there is a significant monthly fluctuation in salinity and the composition of fish community was changing continuously according to the salinity variation.

Assemblage Patterns of Hymenoptera at Different Elevations of Gunung Datuk, Rembau

2017 ◽  
Vol 14 (2) ◽  
pp. 1 ◽  
Author(s):  
Noor Nasuha Abd Aziz ◽  
Siti Khairiyah Mohd Hatta ◽  
Idris Abd Ghani ◽  
Saiyid Jalaluddin Saiyid Shaifuddin
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
High Elevation ◽  
Significant Difference ◽  
Index Site ◽  
Evenness Index ◽  
Abundance And Diversity ◽  
Richness Index ◽  
Paired T Test ◽  
Malaise Traps

A study on abundance and diversity of Hymenoptera was conducted in Gunung Datuk, Rembau. Samplings were conducted from November 2014 to February 2015 using six Malaise traps. Three traps were placed at Site 1 at 700m height for high elevation and the remaining traps were placed at Site 2 at 200m height for low elevation. A total number of 221 Hymenopteran were collected which consist of nine families namely Ichneumonidae, Formicidae, Braconidae, Bethylidae, Evaniidae, Tiphiidae, Vespidae, Pompilidae and Apidae. In this study, 93 individuals were obtained from Site 1, comprising nine families and 43 morphospecies while 127 individuals were obtained from Site 2 with nine families and 45 morphospecies. Formicidae was the most dominant family collected from both sites with a total of 104 individuals while the least family recorded was Apidae with only one individual. Shannon’s Weiner Diversity Index (H’) showed Site 1 had the higher diversity value with H’ = 3.17 compared to Site 2 with value H’ = 3.12. For Evenness Index, Site 1 had higher value compared to Site 2 with E’ = 0.84 and E’ = 0.82 respectively. Moreover, for Margalef Richness Index, Site 1 recorded R’ = 9.24 while site two recorded R’ = 9.08 which concluded that Site 1 had higher species richness compared to Site 2. Paired t-test showed that both sites had no significant difference with p>0.05. Overall study showed that the diversity and abundance of Hymenoptera in Gunung Datuk were low since the value of H’ is less than 3.50.

scholarly journals Characteristics of Benthos communities in Laoting area of Hebei Province

2020 ◽  
Vol 206 ◽  
pp. 02024
Author(s):  
Li Guanglou ◽  
Cao Hongmei ◽  
Ye wei
Keyword(s):  
Community Structure ◽  
Benthic Community ◽  
Dominant Species ◽  
Diversity Index ◽  
Hebei Province ◽  
Benthic Community Structure ◽  
Number Of Species ◽  
Evenness Index ◽  
Sea Area ◽  
Richness Index

According to a survey of benthos in the Laoting sea area of Hebei Province on May 24th 2019, a total of 40 benthos species were obtained, of which mollusks have the largest number, followed by annelids and arthropods. The dominant species are Sternaspis sculata and Ringicula doliaris. The number of species obtained in this survey is much lower than the historical average. The diversity index is significantly lower than that in the April 2008 survey, and the evenness index and richness index have declined slightly, indicating that the benthic community structure in this sea area tends to be simplistic, stability tends to deteriorate.

scholarly journals COMMUNITY STRUCTURE ECHINODERMS (ASTEROIDEA, OPHIUROIDEA, ECHINOIDEA AND HOLOTHUROIDEA) IN THE MARINE NATIONAL PARK EAST SULAWESI WAKATOBI

2016 ◽  
Vol 8 (1) ◽  
pp. 357-366 ◽  
Author(s):  
Eddy Yusron
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
National Parks ◽  
National Park ◽  
Diversity Index ◽  
Dead Coral ◽  
Evenness Index ◽  
Different Types ◽  
High Level ◽  
Richness Index

A study on Echinoderms community structure in marine national parks of Wakatobi, Southeast Sulawesi was conducted in six locations, i.e., Waha Beach, Coastal Sombo, Beach Houses, Beach Kapota, Banakawa beach, and Umala beach in October 2013. All of the six parks were located the Wakatobi territorial waters with coordinates of 5°06'25" S and 123°124'10 E. The results showed of 18 species of echinoderms representing six different types of Asteroidea, two types of Ophiuroidea, six types of Echinoidea, and four types of Holothuroidea. Group of starfish or Asteroidea was the most prominent on seagrass area. Based on the six transects sites, it turned out that the group of starfish (Asteridea) occupied a relatively high level of species richness. From the quantitative analysis values, we obtained diversity index (H) of 1.105 in Sombu, the highest evenness index (J) of 0.989 was found in Umala, and the highest species richness index values (D) of 0.132 was obtained in kapota. It seemed that all echinoderm groups were generally like seagrass microhabitat (12 types). While, sand and dead coral habitats were only occupied by 8 (eight) echinoderm groups. Keywords: echinoderms, diversity, Wakatobi, Southeast Sulawesi

scholarly journals Diversity Measurement Indices of Diatom Communities in the Tigris River within Wasit Province, Iraq

2018 ◽  
Vol 15 (2) ◽  
pp. 117-122
Author(s):  
Baghdad Science Journal
Keyword(s):  
Diversity Index ◽  
Diatom Species ◽  
Aquatic Life ◽  
Tigris River ◽  
Lotic Ecosystem ◽  
Evenness Index ◽  
River Quality ◽  
Diatom Communities ◽  
Richness Index ◽  
Diversity Measurement

The study was conducted to measure diatom species diversity in the lotic ecosystem across the Wasit Province for 12 months. The quantitative study of diatoms (phytoplankton) was investigated in the Tigris river. The density of algae was ranged from 60989 cell×103/l to 112780.82 cell×103/l in the five sites. These algae were belonging to 39 genera. The richness index values ranged from 1.53 at site 5 in January 2016 to 6.34 at site 1 and June2015. Shannon-Weiner diversity index (H´) was 2.33 in February 2016 and 3.72 in June 2015 both values at site 3, whereas Evenness index was 0.54 at site 5 in March2016 and 0.98 at site 1 in both August2015 and May2016. The lack of homogeneity of the appearance of species indicates the dominance of a few species with high densities, which is an indicator of the existence of environmental pressure. All studied indices showed that the Tigris River quality is suitable for the living aquatic life or may be slightly affected by the pollutants.

scholarly journals Dampak Jangka Pendek Penjarangan Hutan Campuran terhadap Keanekaragaman Serangga Terbang di KPH Banten (Short-Term Impact of Thinning of Mixed Forest on the Diversity of Flying Insects in Forest Management Unit of Banten)

2021 ◽  
Vol 9 (1) ◽  
pp. 138
Author(s):  
Ahmad Budiaman ◽  
Noor Farikhah Haneda ◽  
Sarah Nova Irene Lumbantobing
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Mixed Forest ◽  
Similarity Index ◽  
Forest Environment ◽  
Forest Thinning ◽  
Flying Insects ◽  
Evenness Index ◽  
The Impact ◽  
Richness Index

Forest thinning is a sylvicultural practice that aims to provide better growth space for increasing tree growth and stand quality. Forest thinning is a form of forest disturbance that has an impact on the forest environment, including flying insects. This study aimed to assess the impact of thinning of mixed forest stands on the diversity of flying insects. Eight circular plots of 0.1 ha were laid out systematically on thinning plots of 15.3 ha. Parameters observed in the plot included environment factors (stand composition, temperature, humidity, and canopy cover), abundance, species composition, and biodiversity index of flying insects (diversity index, species richness index, evenness index, and similarity index).  The sweep net was used to collect the flying insects. Mann-Whitney test was used to compare the index of biodiversity of flying insects before and after forest thinning. Forest thinning caused a decrease in abundance, species composition, diversity index, richness index, and evenness index of flying insects. Forest thinning led to a decrease in the abundance of herbivorous flying insects and an increase in the abundance of predatory flying insects. Flying insect species found before thinning was not identical to those after thinning.Keywords: diversity index, flying insect, forest ecosystem, forest tending

scholarly journals Herpetofauna community structure and distribution of Watu Joglo cave area, Gunung Kidul, Special Region of Yogyakarta

2020 ◽  
Vol 19 ◽  
pp. 00008
Author(s):  
Khadija Lung Ayu ◽  
Nishfi Laila Maghfiroh ◽  
Afghan Azka Falah ◽  
Muhammad Haekal ◽  
Alfonsus Toribio Eko Saputro ◽  
...  
Keyword(s):  
Community Structure ◽  
Diversity Index ◽  
Diversity Analysis ◽  
Data Sampling ◽  
Wiener Diversity Index ◽  
Evenness Index ◽  
Richness Index ◽  
Special Region

Watu Joglo is one of the caves located in the row of the Sewu mountains, Gunung Kidul, Special Regency of Yogyakarta. Watu Joglo has various suitable microhabitats for herpetofauna. So far, the study about herpetofauna’s community structure and distribution has not been carried out in Watu Joglo. This study aimed to study and map the diversity, richness, evenness, and distribution of herpetofauna in Watu Joglo. Herpetofauna’s data sampling was carried out for three days. The study was conducted on 6-8 April 2018. The data of herpetofauna community were analyzed with Shannon-Wiener diversity index, Margalef richness index, and Pielou Evenness Index. The data of herpetofauna distribution were mapped and analyzed with Avenza and ArcGis. Based on the research conducted, we found 11 species of herpetofauna which consisted of five species from Ordo Anura, four species from Subordo Lacertilia, and two species from Subordo Serpentes. Herpetofauna in Watu Joglo was widely distributed around the river. According to diversity analysis, Watu Joglo has moderate diversity index, 1.667. Besides, Watu Joglo has high evenness index which is 0.85 but low richness index which is 2.83.

scholarly journals Fish Assemblage of Ktiban creek the upper Reach of Shatt Al-Arab River

2019 ◽  
Vol 32 ◽  
pp. 98-123
Author(s):  
Kadhim H. Hasan ◽  
Amjad K. Resen
Keyword(s):  
Current Flow ◽  
Diversity Index ◽  
Total Dissolve Solid ◽  
Sampling Period ◽  
Marine Species ◽  
Freshwater Species ◽  
Light Penetration ◽  
Power Station ◽  
Physical And Chemical ◽  
Richness Index

The study was conducted at the Shatt Al-Arab River at Ktiban creek  in three stations during the period from October 2017 to September 2018. The first station was in the Shatt Al-Arab near Al- Hartha power Station, the second and third stations were in the Ktiban creek. Samples were collected once a monthly. A total of 5106 fish were collected from the study, period included 24 species belong to 12 families, and consisted of eight marine species and 16 freshwater species (nine native and seven exotic species). Physical and chemical characteristics were measured during sampling period. water temperature, dissolved oxygen, pH, light penetration, salinity, current flow, total dissolve solid (TDS), nitrate, nitrite and phosphates The range of parameters  in the Shatt Al-Arab were within their normal levels except salinity values and TDS (8.7 PSU and 8210 mg /l respectively). The values of the diversity index (H) were calculated in the study stations between 1.06 -1.87 and evenness index (j) ranged from 0.42 -0.83and richness index(D) between 1.00 -2.62.

Assemblage Patterns of Hymenoptera at Different Elevations of Gunung Datuk, Rembau

2017 ◽  
Vol 14 (2) ◽  
pp. 1
Author(s):  
Noor Nasuha Abd Aziz ◽  
Siti Khairiyah Mohd Hatta ◽  
Idris Abd Ghani ◽  
Saiyid Jalaluddin Saiyid Shaifuddin
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
High Elevation ◽  
Significant Difference ◽  
Index Site ◽  
Evenness Index ◽  
Abundance And Diversity ◽  
Richness Index ◽  
Paired T Test ◽  
Malaise Traps

A study on abundance and diversity of Hymenoptera was conducted in Gunung Datuk, Rembau. Samplings were conducted from November 2014 to February 2015 using six Malaise traps. Three traps were placed at Site 1 at 700m height for high elevation and the remaining traps were placed at Site 2 at 200m height for low elevation. A total number of 221 Hymenopteran were collected which consist of nine families namely Ichneumonidae, Formicidae, Braconidae, Bethylidae, Evaniidae, Tiphiidae, Vespidae, Pompilidae and Apidae. In this study, 93 individuals were obtained from Site 1, comprising nine families and 43 morphospecies while 127 individuals were obtained from Site 2 with nine families and 45 morphospecies. Formicidae was the most dominant family collected from both sites with a total of 104 individuals while the least family recorded was Apidae with only one individual. Shannon’s Weiner Diversity Index (H’) showed Site 1 had the higher diversity value with H’ = 3.17 compared to Site 2 with value H’ = 3.12. For Evenness Index, Site 1 had higher value compared to Site 2 with E’ = 0.84 and E’ = 0.82 respectively. Moreover, for Margalef Richness Index, Site 1 recorded R’ = 9.24 while site two recorded R’ = 9.08 which concluded that Site 1 had higher species richness compared to Site 2. Paired t-test showed that both sites had no significant difference with p>0.05. Overall study showed that the diversity and abundance of Hymenoptera in Gunung Datuk were low since the value of H’ is less than 3.50.

scholarly journals Seasonal composition, abundance and biomass of the subestuarine fish assemblage in Solís Chico (Río de la Plata estuary, Uruguay)

2016 ◽  
Vol 77 (3) ◽  
pp. 622-631 ◽  
Author(s):  
A. Acuña Plavan ◽  
R. Gurdek ◽  
N. Muñoz ◽  
J. M. Gutierrez ◽  
M. Spósito ◽  
...  
Keyword(s):  
Fish Assemblage ◽  
Fish Community ◽  
Abundant Species ◽  
Estuarine Fish ◽  
Rio De La Plata ◽  
Río De La Plata ◽  
La Plata ◽  
Juvenile Stages ◽  
Micropogonias Furnieri ◽  
First Time

Abstract The large estuaries can present long narrow branches called subestuaries or tidal creeks. These types of subsystems are distributed along the Uruguayan coast of the Río de la Plata estuary and are very important as nursery and refuge areas for fish. For the first time, the seasonal composition and abundance of the fish community of the Solís Chico subestuary was studied by using beach and gill nets. Fourteen species, mainly euryhaline (86%) presented a significant representation of juvenile stages. The fish community was dominated by Odontesthes argentinensis, Platanichthys platana, Mugil liza, Brevoortia aurea, Micropogonias furnieri and Paralichthys orbignyanus, similar to adjacent subestuaries. While Micropogonias furnieri and B. aurea were the most abundant species, some other species were rarely caught. A seasonal variation of the fish assemblage abundance was detected, with higher values in autumn showing a positive correlation with temperature. Species that complete their life cycle in the Río de la Plata estuary, some of which are relevant to fisheries (64% of the analyzed species) were captured in the Solís Chico subestuary. The importance of this environment as a transitional system for some estuarine fish species is advised.

scholarly journals PEMANFAATAN TANAMAN REFUGIA MENGENDALIKAN HAMA PADI (Oryza nivara L) DI SOPORARU TAPANULI UTARA

AGRIFOR ◽  
2021 ◽  
Vol 20 (2) ◽  
pp. 299
Author(s):  
Ameilia Zuliyanti Siregar ◽  
Sampe Lesnida
Keyword(s):  
Plant Disease ◽  
Sampling Method ◽  
Diversity Index ◽  
Red Rice ◽  
Rice Pests ◽  
Evenness Index ◽  
Yellow Traps ◽  
Richness Index ◽  
North Sumatra ◽  
Land Using

The refugia plant is one of the flowers that can be used as a shelter for natural enemies and as a feed sources for insects.  The purpose of this study was to compare the use of refugia and without refugia plants in controlling environmentally friendly red rice pests in Soporaru Hamlet, Sigotom JuluVilalge, Pangaribuan District, North of Tapanuli Regency, North of Sumatra Province. This study uses a purposive sampling method with 3 types of traps, namely: yellow traps, fall traps and net traps. The samples was identified in the Plant Disease Laboratory, Faculty of Agriculture, University of North Sumatra in July 2020  until February 2021.  The results showed that 8 orders of refugia were caught on land using refugia, 23 families, and 1,952 individuals, while on land without refugia there were 8 orders, 22 families and 1,807 individuals.  On land using refugia (r) compared to land without refugia (k) it is known that the Species Richness Index (R) (Rr=2.9 and Rk=2.8), Diversity Index (H) (Hr=2.67 and Hk=  2.19), and Evenness Index (E) (Er=0.85 and Ek=0.71).  Function status identified on land using refugia and without refugia as many as 5 species, namely herbivores, pollinators, predators, parasitoids and scavengers.  

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