scholarly journals The Diversity and Conservation Status of Snakes in Rawa Mekar Jaya, Riau, Indonesia

2021 ◽  
Vol 6 (2) ◽  
pp. 246-254
Author(s):  
Agung Purnomo Adjie ◽  
Sri Catur Setyawatiningsih

Snakes in Mekar Jaya mangrove ecosystem have the potential be ecotourism objects. On the other hand ecotourism activities might reduce the quality of wildlife habitat, including that of the snake. This study aimed to determine the diversity and status of snake species in the mangrove ecosystem of Rawa Mekar Jaya. A transect of 20 x 50 m was made in three stations: rivers (S1), ecotourism route (S2), and dense mangroves (S3). The observation was carried out at low tide and repeated three times with a span of 2 days. Snake data was collected using the Visual Encounter Survey (VES) method. We revealed 59 snakes in the mangrove area of Rawa Mekar Jaya consisting of 3 species namely Boiga dendrophila, Cerberus rynchops, and Trimeresurus purpureomaculatus. B. dendrophila and C. rhyncops are mangrove specialists. The Shannon Wiener diversity index value (H ') for all observation stations is below one, so it is classified as low. All types of snakes found are not protected and classified as the least concern. C. rynchops is included in the CITES appendix III

2019 ◽  
Vol 12 (2) ◽  

Cavite’s remaining upland forest fragments are either remnant from commercial logging activities ca. 25-45 years ago or as a direct result of land conversions for agriculture or human settlements. These forest fragments are very significant because they represent areas where pockets of wildlife habitat still remain. The terrestrial vertebrates are often used to assess animal diversity because they are ideal biological indicators of environmental change and anthropogenic disturbances. The study aimed to determine terrestrial vertebrate diversity, conservation status, and identify major anthropogenic threats in these fragments. Terrestrial vertebrates were surveyed using a combination of strip-transect sampling, time-constrained searches, visual encounter survey (VES), and acoustic encounter survey (AES; for amphibians only), point counts, live trapping and mist netting from October 2014 to March 2016. Species richness and biodiversity estimation were computed using Shannon-Wiener Diversity Index, linear regression, detection and probability modeling using PAST, and confidence limits for nestedness (0.05α) using EpiTools. A total of 175 terrestrial vertebrates were documented and among the vertebrate groups, the birds had the highest observed diversity. Twenty-nine (19 birds, 3 mammals, 3 lizards, and 4 anurans) species are listed as threatened. Habitat loss and degradation due to the conversion of habitats to agricultural and/or residential areas remained to be the most prevalent threat in the remaining forested areas in upland Cavite. Baseline data generated shall be used in the different government biodiversity monitoring activities as the basis for impacts and mitigation and initial planning for the management and conservation of these remaining forest patches.


2021 ◽  
Vol 9 (1) ◽  
pp. 30
Author(s):  
Badia Roy Ricardo Nababan ◽  
Sugeng P. Harianto ◽  
Agus Setiawan

University of Lampung (Unila) is one of the Green Open Space (GOS) in Bandar Lampung City which has vegetation. Vegetation in green open space has a role as a wildlife habitat for example birds. Various bird species can be indicators of the quality of open green space at the University of Lampung. This research was conducted to determine the diversity of bird species and as an indicator in determining the index of green space quality at the Unila Campus. Research is conducted from November 2016 to March 2017 and December 2018. The study was conducted at the Unila Campus which is divided into eight blocks. An inventory of the diversity of bird species carried out with concentrated observations in eight blocks. The value of diversity of bird species uses an analysis of shannon-wienner heterogeneity index value and the quality of green open space through the calculation of green space quality index values. Based on the results of the study there were 20 species of birds on the Unila campus. The diversity index of bird species is classified as moderate (H '= 2.74). The GOS quality index at the Unila Campus is 59.2 with the intermediate category.


2021 ◽  
Vol 38 (4) ◽  
pp. 399-409
Author(s):  
Hazel Baytaşoğlu ◽  
Ahmet Mutlu Gözler

In this study, it was aimed to evaluate the water quality of the Çoruh Basin using BMWP (Biological Monitoring Working Party) index, ASPT (Average Score Per Taxon) index, Shannon-Wiener Diversity Index, EPT (Ephemeroptera Plecoptera Trichoptera taxa), EP (Ephemeroptera Plecoptera taxa) index scores and benthic macroinvertebrates. The benthic macroinvertebrates were collected from 54 stations at the Çoruh basin between 2014-2016 years. Standard hand net (D-frame net) and Ekman-Birge grab were used as sampling tools. As a result of the diagnoses, a total of 7246 individuals belonging to Insecta, Crustacea, Mollusca, Oligochaeta and Plathyhelminthes were obtained. It was determined that the most dominant group was Insecta and the rarest group was Plathyhelminthes. It was observed that the BMWP score ranged between 5 and 94, and the lowest and highest number of families detected in the stations were 1 and 18, respectively. It was determined that the Shannon Wiener diversity index value was between 0.54-2.20, therefore the basin streams generally showed moderate pollution. The results of BMWP index show that the basin streams had mostly show 3rd and 4th class water quality and also biodiversity decreases with the deterioration of the riverbed or exposure to pollution.


2021 ◽  
Vol 6 (3) ◽  
pp. 67328
Author(s):  
Nur Apriatun Nafisah ◽  
R.C.Hidayat Soesilohadi

Petungkriyono forest is a tropical rainforest with high biodiversity. The increasing tourism activities in Petungkriyono lead to land conversion. Dragonfly (order Odonata) is a good bioindicator for aquatic and terrestrial. This study aimed to compare the community structure of Odonata in natural forests and tourist sites. The method of collecting imago Odonata was done by direct searching, samples were captured using sweep netting. The results showed that the dragonflies found in all locations consisted of the same family, 2 families (Gomphidae and Libellulidae) from the suborder Anisoptera and 6 families (Calopterygidae, Chlorocyphidae, Coenagrionidae, Euphaidae Platycnemididae, and Platystictidae) from the suborder Zygoptera. The total species of dragonflies found in Sokokembang were 15 species with a total of 293 individuals, Tirta Muncar 13 species of 287 individuals, Karanggondang 17 species of 276 individuals, and Curug Lawe 14 species of 242 individuals. The highest relative abundance of individuals was in the natural forest of Sokokembang is Drepanosticta spatulifera (26.28%) and in Karanggondang Vestalis luctuosa (24.64%), while in the tourist forests of Tirta Muncar and Curug Lawe were Euphaea variegata (34.84% and 28.51 %). The structure of the Odonata community is based on the Shannon-Wiener diversity index in the natural forests of Sokokembang (2.18) and Karanggondang (2.21) at the tourist sites of Tirta Muncar (1.84) and Curug Lawe (2.11). The results showed that the structure of the Odonata community based on the level of the diversity index value, evenness index, and dominance index in natural forests and tourist sites in Petungkriyono forest was not significantly different. 


DEPIK ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 174-179
Author(s):  
Widadi Padmarsari Soetignya ◽  
Patrisia Marniati ◽  
Mardan Adijaya ◽  
Yunita Magrima Anzani

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


2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Dwiagustien Putri Melaponty ◽  
. Fahrizal ◽  
Togar Fernando Manurung

The research was conducted in the Bukit Senja City Forest Area, Middle Singkawang  District, Singkawang City. The purpose of the research was to find out diversity of forest vegetation in the city forest and vegetation which dominate the forest. The research was carried out for ± 4 weeks in the field and continued to analysis data. Method used in the research is direct observation through the analysis of vegetation in the field by using a line of paved paths made in a direction perpendicular to the contour with 4 lines each path = 500m with lane 1 as many as 25 plots, lane 2 as many as 25 plots, lane 3 as many 19 plots and lanes 4 of 25 plots. Based on analysis on data there were dominant trees which filled the forest based on INP seed, namely Durian 78.828%, Karet 53.480% and Jelatung 22.81%. According to the type of tillers namely Karet 34.58%, Durian 26.02%, and Simpur 23.97%. From the quantitative analysis it showed that be seen that in the index value dominant  (C) of a species is <1, which means the kind of go contained in the research is varies not only is controlled by one kind of. Diversity Type (H ') is in the group <1 which means it has a moderate Diversity Index (1 <H' <3). Abundant index (e) results show that the value of E => 0.6, which means that the type of abundant is high.Keywords: Bukit Senja Singkawang middle, City Forest, Vegetation Species Diversity


Author(s):  
Izzah Yuz Rifa Widyaningrum

Quality is important in sales activities that need to be considered in order to meet the desires and expectations of consumers so that consumers will believe the products are made. In a study entitled "The Effect Of Quality Products At Home Sales Volume Industry Kripik Tempe" Abadi "Singgahan KartoharjoMagetan district" has a purpose: first to determine the quality of the Home Products Industry Kripik Tempe "Abadi" SinggahanKartoharjoMagetan district, both to determine the volume of sales in the Home Industries KripikTempe "Abadi" Singgahan District Kartoharjo Magetan.<br />Based on the results of data processing and simultaneous testing on a real level (α) = 5% indicates that the quality of the product simultaneously significantly influence Sales Volume At Home IndustryKripik Tempe "abadi" Singgahan District Kartoharjo Magetan. This is evident from the value of 20.638 while the value FcountFtable 4,042. On the other hand Sighit values of 0.000 and 0.05 Sigprob. This means that the value of F count ≥ Ftabel (≥ 20.638 4.042) and Sighit ≤ Sigprob (0.05 ≤ 0.000). However, when seen from the regression equation factors positively influence the quality of the product shown in the regression equation obtained value equation Y = 50.107 + 0.494 X.


2021 ◽  
Author(s):  
◽  
Margaret Franken

<p>Research on second language teaching and learning has to date focused primarily on the major skills of reading, writing, listening, and speaking but has treated them as relatively separate areas of investigation. By contrast this research investigates the role of one skill, speaking, in the performance of another, writing. The study investigates the effect of an instructional sequence that aimed to prepare upper high school students (Form 6/Grade 12) to write better argument essays. The sequence was experienced by the students in two ways. One way was for students to engage in talk with a peer before and during writing. The other way was for students to work in a solitary way. Qualitative data analysis compared the writing scores gained by students on two sets of variables: one to indicate the quality of text in general terms (Hamp-Lyons, 1986) and the other to indicate quality of text in terms of specific features of argument: claims, elaboration of claims, grounds and elaboration of grounds (Toulmin, 1958; Toulmin, Rieke and Janki, 1984). The results of the qualitative analysis indicate that opportunity to work with a peer before and during writing had a limited and specific effect on the texts that students wrote. Positive effects for opportunity to talk were seen in the quantity of grounds-related material, but only when students wrote texts that appeared to require more content and domain-specific knowledge (Alexander, Schallert and Hare, 1991). It appeared that talk could operate to help students access relevant prior knowledge (Alexander, Schallert and. Hare, 1991) to support the claims made in their argument texts. Working in a solitary way resulted in significantly better mean scores for linguistic accuracy and complexity. This finding is not consistent with claims made in the output hypothesis (Swain, 1985; Swain, 1995; Swain and Lapkin, 1995). One explanation is that students working together may not have been 'pushed' to consider aspects of language form in attempts to communicate meaning. Another is that this did occur but consideration of form did not transfer to subsequent writing. Another variable that appeared to influence writing quality was the level of resourcing provided for the writing task. Access to textual resources (input in the form of cohesive and linear text) appeared significantly to affect all three of the general measures of text quality, suggesting that textual input is a valuable linguistic and rhetorical resource for writers. When students' texts were analysed specifically for frequency of features of argument, different effects were found for levels of resourcing. Claims and elaboration of claims were most affected by the semi-resourced form of input represented by fact sheets (lists of propositions). Students appeared to make use of input in the form of fact sheets for meeting claim-like requirements in their texts. This might have been because the fact sheets represented information in a way that required the least amount of transformation to be accessible and useful. Analysis of transcript data was carried out on three selected pairs of students to explore the nature of the talk which produced significant and positive results. The type of talk associated with the pair that showed the greatest scores was qualitatively different in terms of the amount and topic of substantive talk and the frequency of responses to initiations. The talk also operated to push each participant, particularly the weaker of the two, to respond, explain and elaborate. The fact that the weaker student in the most productive pair made use of what he articulated suggested that, for him, the talk appeared to set the discourse parameters of the writing task. In addition, the results of the study pointed to the fact that speaking with a partner, particularly a more expert partner, before and during writing can bring positive effects particularly for drawing on relevant prior knowledge thereby enhancing content and domain-specific knowledge. A proficient and interactionally expert partner can promote discussion of relevant prior knowledge useful for supporting claims made in argument texts. The analysis of transcript data indicates that few students show interactional proficiency and that this may prove a worthwhile focus for pedagogy. The present study supports the line of research in collaborative learning (Cohen, 1994) as it has explored the conditions under which positive effects on writing are likely to occur. Research may profitably continue to explore the features of successful interaction and the conditions that successful interaction creates, particularly as it enables better writing. Not only are conditions worthy of further research, so too are effects, as they are likely to operate on different aspects of writing and in different genres. Constraints operating particularly in the area of argument need to continue to be explored empirically. The present study has concluded with the belief that there is still much to know in the relationship between speaking and writing. For this reason, teachers may do well to pay careful consideration to the way in which pair and group tasks are managed in the classroom. This entails the provision of guidance and support for the participants so that purposeful interaction occurs.</p>


2020 ◽  
Vol 37 (4) ◽  
pp. 397-407
Author(s):  
Ozge Basoren ◽  
Nilgün Kazancı

Yeşilırmak River is one of the most important running waters of Turkey, but the water quality of this river has been affected by agricultural and domestic pollution. Dams and hydroelectric power plants also threaten the habitat quality and biodiversity of the river. This research contains investigation of Diptera fauna in Yeşilırmak River and tributaries, determination ecological characteristics of the collecting sites according to System A and System B Classification of Water Framework Directive (WFD), assessment of water quality of the studied sites by measuring the physicochemical variables (water temperature, pH, electrical conductivity, dissolved oxygen, NO2-N, NO3-N, NH4-N, PO4-P) and using some metrics (abundance, number of taxa, Simpson Diversity Index, Shannon-Wiener Diversity Index, Margalef Diversity Index, Evenness). Thirty-three (33) sites were sampled from Yeşilırmak River and its tributaries in June 2010. Diptera individuals were detected in 20 of them. Two thousand four hundred forty-five (2445) individuals belonging to 12 families and 16 taxa were identified in 20 sampling sites. The water quality classes of the studied sites were Class III (moderate pollution) and Class IV (heavily pollution) according to values of physicochemical variables.


2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Slamet Isworo ◽  
POERNA SRI OETARI

Abstract. Isworo S, Oetari PS. 2020. Mangrove vegetation and bird communities around Tegal Port, Central Java, Indonesia. Biodiversitas 21: 1551-1560. The ecological balance in Tegal harbor area needs to get serious attention due to the impacts of Tegal Port activities. For this purpose, the diversity of mangrove and avifauna (bird) can be used as bio-indicators of the ecological stability of the area. This study aimed to assess and analyze the diversity of plants and avifauna (birds) that live in mangrove and coastal zones around Tegal Port development area. Data collection was conducted using purposive random sampling method on two sites for vegetation and three sites for avifauna. The importance value index, Shannon-Wiener diversity index and Sorensen’s similarity index was calculated for the vegetation. For birds, we calculated the diversity and similarity index as well as identified their conservation status based on the IUCN Red List, CITES and government regulations. In terms of vegetation, Rhizophora mucronata and Avicennia marina dominate Site 2 (Tegalsari) while Casuarina equisetifolia and R. mucronata dominate Site 3 (Alam Indah Beach). Overall, the vegetation has low biodiversity index and similarity between sites is also low. For bird, there are 37 species from 18 families. Site 1 (Muara Reja) has the highest number of species with 29 species, followed by Site 2 (Tegalsari) with 25 species, and Site 3 (Alam Indah Beach) with 22 species. The three sites have moderate diversity index and there is high similarity index between sites. All bird species found in the study sites are listed as Least Concern under IUCN Red List, while there are two species protected under national protection law, i.e. Ardea alba and Glareola maldivarum. In general, the condition of mangrove vegetation around Tegal Port has low diversity. This suggests that the pressure on the environment is quite high, causing only few plant species to be able to live and dominate the ecosystem. The limited vegetation also causes birds community, especially the protected A. alba and G. maldivarum in Site 2, becomes increasingly difficult to find, because places to find food, breeding places and places to rest are disturbed.


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