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

Carabidae of Barnaul city parks: ecological characteristics and species composition

2018 ◽  
Vol 8 (2) ◽  
pp. 348-353
Author(s):  
E. A. Kuchina ◽  
N. D. Ovcharenko ◽  
L. D. Vasileva
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Similarity Index ◽  
Life Forms ◽  
Ground Beetles ◽  
Forest Steppe ◽  
Ecological Groups ◽  
Dominant Group ◽  
Species Diversity Index ◽  
Steppe Species

<p>Anthropogenic impact on the population of ground beetles leads to a change in their numbers, structure of dominance, density, species composition, spectrum of life forms. This makes the beetles Carabidae a convenient and informative bioindicator of the ecological state of biocenoses. The material for this work was the Carabidae collections conducted in June-August 2016-2017 in the park zone of different regions of Barnaul, differing in location, area, hydrological regime, vegetation cover, purpose and anthropogenic load. When processing the material, the quantitative, species and generic composition of the carabidae was determined, calculations were made for such indicators as the Berger-Parker dominance index, the Shannon species diversity index (Hs), and the Jacquard species similarity index. The fauna (Coleoptera, Carabidae) of the park zone of Barnaul is represented by 55 species belonging to 20 genera. The dominant group is represented by species belonging to steppe, forest and polyzonal groups. Forest-steppe species of ground beetles as dominants have not been identified in any of the investigated territories. The greatest variety of ecological groups was noted on the territory of the Yubileyny рark, which is explained by the presence of zones with various microclimatic conditions, the presence of a birch grove that flows through the park with the Pivovarka River, and a wide log in the park. Registered species belong to eight groups of life forms belonging to two classes - zoophagous and myxophytophagous. On the numerical and species abundance, zoophages predominate. The spectrum of life forms corresponds to the zonal spectrum characteristic of the forest-steppe zone.</p><p> </p>

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.

Molluscs Diversity in Coastal Ecosystem of South Biak, Papua

2017 ◽  
Vol 2 (1) ◽  
pp. 25 ◽  
Author(s):  
Ludi Parwadani Aji ◽  
Andriani Widyastuti
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Sampling Method ◽  
Diversity Index ◽  
Similarity Index ◽  
Coastal Areas ◽  
Seagrass Beds ◽  
Simpson Index ◽  
Transect Line ◽  
Evenness Index

Coastal areas of Biak Island consist of three major ecosystems: the mangrove, seagrass beds, and coral reefs where a variety of molluscs live. Mollusc diversity in South Biak waters was investigated in September 2011. The observation was conducted at 4 locations, i.e. Paray, Ambroben, Yenures, and Sorido with 2 stations at each location. The study aimed to obtain information on the diversity and community structure of the benthic molluscs (gastropods and bivalves) on the coastal areas of South Biak waters. Sampling method applied was quadrate-transect line in intertidal areas from inshore to offshore. The molluscs (epifauna and infauna) found inside the quadrate-transect were counted and identified. The result showed high benthic mollusc diversity with a total of 94 species, consisting of 75 species of gastropods and 19 species of bivalves. The most widespread gastropod found in all stations was Nassarius sp., while for bivalves was Tellina sp. The highest value of diversity index (H) was 2.96 found in Paray 1 and the lowest was 0.58 in Yenures 1. The Evenness index (E) and Simpson index (D) ranged from 0.27 to 0.96 and from 0.06 to 0.72 respectively. Species richness (d) ranged from 2.89 to 6.84 and similarity index from 3.90 to 42.40.  

scholarly journals Species Diversity and Composition of Chalcidids Wasps (Chalcidoidea: Hymenoptera) on Tidal Swamp Rice Field in Indragiri Hilir District, Indonesia

2021 ◽  
Author(s):  
Zahlul Ikhsan ◽  
Hidrayani . ◽  
Yaherwandi . ◽  
Hasmiandy Hamid ◽  
Rosichon Ubaidillah
Keyword(s):  
Species Diversity ◽  
New Record ◽  
Rice Field ◽  
Diversity Index ◽  
Species Abundance ◽  
Similarity Index ◽  
Rice Production ◽  
Sampling Techniques ◽  
Tidal Swamp ◽  
Richness Index

Background: Indragiri Hilir District has the most extensive rice harvest area and is the most significant contributor to rice production in Riau Province. Family Chalcididae is a parasitoid insect that can act as a biological agent to reduce pest attacks on rice. This research aimed to study the species diversity of Chalcididae on tidal swamp rice fields in Indragiri Hilir District. Methods: Sampling was carried out in two periods of rice planting. Samplings were conducted in 4 sub-districts of rice production centers, namely Batang Tuaka, Keritang, Reteh and Tembilahan Hulu, using three sampling techniques (i.e., insect net, malaise trap and yellow pan trap). Diversity index (H’), Species richness index (d), Species Evenness index (J’) and Similarity Index (Is) were calculated. Result: We found 127 individuals consisting of 5 genera and 11 species of Chalcididae were found in the four studied areas. Among them, Antrocephalus lugubris, A. maculipennis, Brachymeria excarinata, B. minuta and Dirhinus anthracia. B. excarinata and Antrocephalus sp. are reported as a new record to Indonesia and were found in all study locations. B. excarinata has the highest abundance of individuals. The shape of the landscape can influence the diversity index, species abundance and individual abundance of Chalcididae.

scholarly journals The diversity of trees species in Taman Wisata Alam Ruteng, East Nusa Tenggara

1970 ◽  
Vol 6 (2) ◽  
Author(s):  
DEDE SETIADI
Keyword(s):  
Data Analysis ◽  
Diversity Index ◽  
Similarity Index ◽  
Research Use ◽  
Index Species ◽  
Yield Value ◽  
Evenness Index ◽  
Parallel Direction ◽  
Value Diversity

The objectives of this research were to know important value, diversity index, evenness index, and similarity index species of tree in Taman Wisata Alam of Ruteng. This research use Centered Quatered Method with transek longly is band follow the example of 200 m with parallel direction of contour. At entire all area specified by 7 station of perception that is station I area of Mocok with height 600 m asl, station II area of Ponggeok with height 750 m asl, station III area of Lempang Paji with height 900 m asl, station IV area of Uluwae with height 1050 m asl, station V area of Nggalakleleng 1200 m asl, station VI area of Gololalong with height 1350 m asl, and station VII area of Mano with height 1500 m asl. From result data analysis hence can be taken by some conclusion of the following: (i) In each height perceived by species having highest important value different each other. Species having high important value at entire all station of present is Elaeocarpus floribundus, Podocarpus amarus, Ehretia timorensis, Knema cinerea, Elaeocarpus sp., Prunus sp., and Litsea sp. (ii). Diversity index was between 0,98-1,51, the value enter in low category. (iii). Eveness index of species at entire all station of perception relative is of equal was between 0,847-1,020. (iv). According of similarity index at entire all station which compared of generally lowering. There are no combination of station of perception which compared yield value of similarity index at > 75%.© 2005 Jurusan Biologi FMIPA UNS SurakartaKey words: diversity, trees, Taman Wisata Alam Ruteng, East Nusa Tenggara.

scholarly journals Preliminary data on centipedes (Chilopoda: Scolopendromorpha and Scutigeromorpha) in Ta Xua natural reserve, Son La Province, Vietnam

2018 ◽  
Vol 40 (1) ◽  
pp. 100-107
Author(s):  
Tran Thi Thanh Binh ◽  
Nguyen Duc Hung ◽  
Ha Kieu Loan ◽  
Vu Thi Ha
Keyword(s):  
Species Composition ◽  
New Records ◽  
Diversity Index ◽  
Mixed Forest ◽  
Natural Forest ◽  
Northwestern Part ◽  
Bamboo Forest ◽  
Natural Forests ◽  
Natural Reserve ◽  
Study Results

 Study on centipedes was conducted in Muong Thai commune, Ta Xua Natural Reserve, Son La in May and November 2017. Samples were collected in four typical habitats: natural forests, bamboo mixed forests, bamboo forests and agro-residental areas. As a result, a total of 17 species and subspecies in two orders (Scolopendromorpha and Scutigeromorpha) was recorded in that region. Of which, the order Scolopendromorpha has 15 recorded species and subspecies belonging to 7 genera, 3 families (Cryptopidae, Scolopendridae, Scolopocryptopidae). The other order, Scutigeromorpha, has only one species in one family (Scutigeridae). The study results also contributed new records of 13 species in 7 genera to the centipede fauna of the northwestern part of Vietnam, and 1 genus, Thereuonema, to the Vietnamese fauna.Among four habitats, natural and bamboo forests have highest similarity on species composition, but agro-residental area and bamboo forest have lowest value on species composition. The diversity index (H’) is highest in bamboo forests (2,98), decreases in mixed forest (2,31), natural forest (1,67) and agro-residental area (0,74). In contrast, centipede density is highest in natural forest (0,60 ind./m2), reduces in bamboo forest (0,47 ind./m2) and mixed forest (0,20 ind./m2).

scholarly journals SPECIES DIVERSITY AND ABUNDANCE OFANTS (HYMENOPTERA: FORMICIDAE)ON TIDAL SWAMP RICE IN INDRAGIRI HILIR, INDONESIA

2020 ◽  
Vol 8 (12) ◽  
pp. 658-664
Author(s):  
Zahlul Ikhsan ◽  
◽  
Hidrayani a ◽  
Yaherwandi b ◽  
Hasmiandy Hamid ◽  
...  
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Species Abundance ◽  
Similarity Index ◽  
Pitfall Trap ◽  
Sampling Techniques ◽  
Agricultural Ecosystems ◽  
Tidal Swamp ◽  
Richness Index ◽  
High Diversity

Indonesia has a high diversity of ant species, but much remains unreported. In agricultural habitats, ants can act as predators, decomposers, and bioindicators for agricultural ecosystems health. This research aimed to study the species diversity of Formicidae on tidal swamp rice fields in Indragiri Hilir District. Sampling was carried out in two periods of rice planting. Samples were conducted in 4 sub-districts of rice production centers, namely BatangTuaka, Keritang, Reteh, and Tembilahan Hulu, using four sampling techniques (i.e., insect net, malaise trap, yellow pan trap, and pitfall trap). Diversity index (H ), Species richness index (d), Species Evenness index (J), and Similarity Index (Is) were calculated. We found 5,754 individuals consisting of 5 subfamilies and 43 species of Formicidae at the four studied areas. Subfamily Myrmicinaehas the highest individual abundance, 2.578 individuals, followed by subfamily Formicinae1.823 individuals, subfamily Ponerinae 776 individuals, subfamily Dolichoderinae 575 individuals, and subfamily Pseudomyrmecinae 2 individuals. Diversity of plant species and environmental factors can affect the diversity index, species abundance, and abundance of individual Ants.

Sign in / Sign up

Export Citation Format

Share Document