scholarly journals DEDEYOLU GÖLETİ (ELAZIĞ–TÜRKİYE) ZOOPLANKTONU

2020 ◽  
Vol 15 (4) ◽  
pp. 143-154
Author(s):  
Serap Saler
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Dominant Species ◽  
Positive Relationship ◽  
Ph Value ◽  
Strong Positive Correlation ◽  
Keratella Cochlearis ◽  
Index Value ◽  
Richness Index ◽  
Number Of Individuals

In this study, it is aimed to determine the zooplankton and species diversity of Dedeyolu Pond. Zooplankton samples were taken from 3 stations in monthly periods between May 2011 and April 2012. In the research, 17 species belonging to Rotifera, 6 species belonging to Cladocera and 2 species belonging to Copepoda were identified in Dedeyolu Pond. Among all zooplankton, it was represented Rotifera with 81%, Cladocera with 14% and Copepoda with 5%. Species diversity reached its highest value in April (H'=2.34) in the 3rd station, and the Margalef species richness index value reached its highest value in the first station (D=3.84) in October. There were a strong positive correlation between the number of individuals and the temperature in Dedeyolu Pond (r=0.674), a weak positive relationship between the number of individuals and the pH value (r=0.370), and a weak positive relationship between the number of individuals and the dissolved oxygen value (r=0.290). Keratella cochlearis species was recorded as the dominant species in all seasons in the pond.

scholarly journals Composition and diversity of anurans in the Restinga of the Conde municipality, northern coast of the state of Bahia, northeastern Brazil

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Felipe Augusto Trindade Gondim-Silva ◽  
Alessandra Rodrigues Santos Andrade ◽  
Rafael Oliveira Abreu ◽  
Jamile Santos Nascimento ◽  
Geovane Paixão Corrêa ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Species Composition ◽  
Rainy Season ◽  
Dominant Species ◽  
The State ◽  
Northeastern Brazil ◽  
Freshwater Wetland ◽  
Northern Coast ◽  
Anuran Species

Abstract The Conde municipality is located in the northern coast of the state of Bahia (NC), northeastern Brazil, and is part of the Atlantic Tropical domain. The anuran fauna of the northern portion of the NC is still poorly known if compared to the southern portion. The Restinga is one of the predominant environments of the coastal plains of the NC and it is characterized essentially by presenting sandy soil covered by herbaceous and shrubby vegetation. The objective of this study was to determine the anuran species composition and diversity for the Restinga of the Conde municipality. Sampling was carried out at night by active search over four periods of five consecutive days each, two over the 'main rainy season' and two in a 'lesser rainy season', using 14 sample units (SUs) and five extra sample plots (EPs). We calculated dominance and species diversity using the Berger-Parker and Shannon-Wiener H' indices, respectively. We used accumulation curves and the Jackknife 1 estimator to estimate anuran species richness, considering only the data obtained from the SUs. We recorded 713 anuran specimens distributed within 33 species, 13 genera and five families (Bufonidae, Craugastoridae, Hylidae, Leptodactylidae and Microhylidae). The Hylidae and Leptodactylidae families had the highest species richness. Considering only the SUs (Jackknife 1 estimator in brackets), we recorded 28 species in the study area (33.9 ± 2.3), 13 in Shrubby Vegetation Zones - SVZ (20.8 ± 2.9) and 25 in Freshwater Wetland Zones - FWZ (28.9 ± 1.9). The abundance and species diversity of the FWZ (n = 638 specimens; H'= 2.4) were higher than those recorded for the SVZ (n = 52 specimens; H' = 1.9). The SVZ and FWZ showed distinct dominant species, wherein Pristimantis paulodutrai was the dominant species in SVZ and Scinax fuscomarginatus in FWZ. The Restinga of the Conde municipality stands out as the one with the highest anuran species richness already recorded considering only SVZ and FWZ. Moreover, its anuran species composition represented 55% of the anuran species known for the NC and included taxa common to three different morphoclimatic domains (Tropical Atlantic, Cerrado and Caatinga).

scholarly journals Fish species diversity in headwaters streams of Paraguay and Paraná Basins

2007 ◽  
Vol 50 (6) ◽  
pp. 1033-1042 ◽  
Author(s):  
Yzel Rondon Súarez ◽  
Sabrina Bigatão Valério ◽  
Karina Keyla Tondado ◽  
Alexandro Cezar Florentino ◽  
Thiago Rota Alves Felipe ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Environmental Factors ◽  
Fish Species ◽  
Total Species Richness ◽  
Paraná Basin ◽  
Parana Basin ◽  
Number Of Individuals ◽  
Total Species ◽  
Fish Species Diversity

The influence of spatial, temporal and environmental factors on fish species diversity in headwater streams in Paraguay and Paraná basins, Brazil was examined. A total of 4,605 individuals were sampled, distributed in 60 species. The sampled streams in Paraná basin presented a larger total species richness (42) than Paraguay streams (40). However the estimated richness was larger in Paraguay basin (53) than Paraná streams (50). The streams of Paraná basin had a greater mean species richness and evenness, while more individuals per sample were found in the Paraguay basin. Difference between the sub-basins were found in the Paraguay basin, while for the basin of Paraná, richness and evenness vary significantly between the sub-basins, but the number of individuals varied seasonally. The most important environmental factors to species diversity and abundance were altitude, water temperature, stream width and stream depth for both the basins.

scholarly journals Orchid bee fauna responds to habitat complexity on a savanna area (Cerrado) in Brazil.

Sociobiology ◽  
2016 ◽  
Vol 63 (2) ◽  
pp. 819 ◽  
Author(s):  
Yasmine Antonini ◽  
Rodrigo Assunção Silveira ◽  
Márcio Oliveira ◽  
Cristiane Martins ◽  
Reisla Oliveira
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Habitat Complexity ◽  
Habitat Structure ◽  
Dominant Species ◽  
Large Range ◽  
Physical Structure ◽  
High Complexity ◽  
Orchid Bee ◽  
Species Richness And Abundance

Habitat structure and complexity may broadly affect the diversity and composition of a variety of fauna in terrestrial systems. Here we investigated responses of orchid bee assemblages to habitat complexity, with the aim of assessing complexity as a useful surrogate for species diversity of this group. We test the following hypotheses: (i) There is a greater species richness and abundance of orchid bee in sites with high habitat complexity than lower habitat complexity; (ii) High habitat complexity sites have a different species composition of orchid bee than lower habitat complexity sites. For the purposes of our study, we defined habitat complexity as the heterogeneity in the arrangement in physical structure of habitat (vegetation), although there are a large range of operational definitions in the literature. As result, orchid bee species richness was higher in high complexity areas while community composition was not affected by habitat complexity, because Euglossa melanotricha and E. leucotricha were the dominant species, occurring in both environments. Habitat complexity, measured as a function of differences in multiple strata in forests, may be of great worth as a surrogate for the diversity of a range of arthropod groups including orchid bees. 

Experimental removal of a dominant species at two levels of soil fertility

1989 ◽  
Vol 67 (12) ◽  
pp. 3470-3477 ◽  
Author(s):  
Jessica Gurevitch ◽  
Robert S. Unnasch
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Soil Fertility ◽  
Dominant Species ◽  
Dactylis Glomerata ◽  
Common Species ◽  
Herbaceous Plant ◽  
Old Field ◽  
Steep Decline ◽  
Dactylis Glomerata L

Fertilization of the soil in herbaceous plant communities has been observed to lead to an increase in productivity but a decline in species richness and diversity. We tested the hypothesis that the decline in diversity is due to increased competition from a dominant species by removing the dominant species, Dactylis glomerata L., from an old field community with and without fertilization. Fertilization without the removal of Dactylis resulted in a steep decline in species numbers and in species diversity. The removal of Dactylis when fertilizer was added prevented the decline in species richness. Removal of this dominant species led to an increase in species diversity, an increase in either the frequency or the abundance of almost half of the common species in the system, and an increase in the combined biomass of uncommon species. The response to the removal of Dactylis was greater at higher than at low soil fertility for most but not all variables. Key words: old-field, fertilization, competition, species diversity, community structure, Dactylis glomerata.

scholarly journals KEANEKARAGAMAN JENIS VEGETASI PENYUSUN HUTAN MANGROVE DI DESA MEDAN MAS KABUPATEN KUBU RAYA

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Muhammad Nasir ◽  
. Burhanuddin ◽  
Iswan Dewantara
Keyword(s):  
Species Diversity ◽  
Transfer Functions ◽  
Forest Disturbance ◽  
Tree Level ◽  
Survey Method ◽  
Mangrove Forests ◽  
Vegetation Diversity ◽  
Index Value ◽  
The Right ◽  
Richness Index

This study was conducted to determine the diversity of vegetation species that compose mangrove forests in the village of Medan Mas, Kubu Raya Regency. Measured parameters of important value index , dominance index (C), species richness index (RI), species evenness index (e) was carried out using the survey method by means of a plot. The placement of the research path was done (purposive ). The path made in this study is 10 meters wide (5 m to the left 5 m to the right) and the path length is adjusted to the conditions in the field to the river boundary. From the pathway, a sub-plot is made with a size of 10 m x 10 m for the tree level, and 5 m x 5 m for the sapling level and 2 x 2 for the seedling level. The results of this study indicate that the types found in the field amounted to 12 species for seedlings, 10 species for saplings and 9 species for trees. . Based on the results of the data obtained, it is known that the index value of species diversity (H) at seedling, sapling and tree levels shows a number <1. This means that the value of species diversity found in mangrove forests in Medan Mas Village is relatively low. Forests with low species diversity values indicate that the forest area has experienced forest disturbance or damage. When data collection is carried out in the field, there are several locations that experience disruption or damage in the form of logged-over or transfer functions as shrimp ponds.Keywords: Mangrove Forest, Vegetation Diversity

scholarly journals Phytoplankton Species Diversity in The Manado Bay River's Mouths

2018 ◽  
Vol 6 (1) ◽  
pp. 123
Author(s):  
I Gede Bagus Indradewa ◽  
Rose O.S.E Mantiri ◽  
Jan F.W.S. Tamanampo
Keyword(s):  
Species Diversity ◽  
Dominant Species ◽  
Diversity Index ◽  
Mesh Size ◽  
Marine Species ◽  
Freshwater Species ◽  
Ecological Indices ◽  
Phytoplankton Species ◽  
Explorative Study ◽  
Index Value

The research was conducted in four rivermouths surrounding city of Manado. The first location is Bahu rivermouth, second location is Sario rivermouth, third location is Jengki rivermouth and the fourth location is Bailang rivermouth. Objectives of this study were to reveal the composition of phytoplankton and its ecological indices in those four rivermouths.Method used was considered as descriptive and explorative study. Plankton net with 60 µm mesh size used for samples collection. The volume of water on the cod end was 50 ml which then  brought into the laboratory for further identification and density calculation.Fourtyfive in total of phytoplankton species identified on those four rivermouths comprise of 23 marine species and 22 freshwater species. The highest density value (5.99 individu/l) was found in Jengki rivermouth while the lowest found in Bahu rivermouth (0.65 individu/l). Those four rivermouths have diversity index ranging from 0.94 to 2.03 that considered high. This index value shows that there is no dominant species recorded in the study areasKeyword: Phytoplankton, Rivermounth, Manado bay AbstrakPenelitian ini dilaksanakan di empat muara sungai yang terdapat pada Kota Manado. Lokasi pertama di muara sungai Bahu, lokasi kedua di muara sungai Sario, lokasi ketiga di muara Sungai Jengki dan lokasi keempat di muara sungai Bailang. Tujuan penelitian yaitu mengetahui jenis-jenis fitoplankton di keempat muara sungai di Kota Manado kawasan Teluk Manado dan mengetahui kepadatan spesies dan indeks ekologis fitoplankton di keempat muara sungai tersebut.            Penelitian ini menggunakan metode deskriptif dan eksploratif. Sampling plankton menggunakan plankton net ukuran 60 µm. Air yang tersaring dan tertampung di cod end  sebanyak 50 ml kemudian diidentifikasi dan dihitung kepadatannya.Diperoleh 45 spesies fitoplankton di empat muara tersebut terbagi atas 23 spesies air laut dan 22 spesies air tawar, dengan kepadatan tertinggi sebesar 5,99 ind/l yang terdapat pada muara Jengki dan kepadatan terendah sebesar 0,65 ind/l terdapat pada muara Bahu. Keempat muara tersebut memiliki indeks keanekaragaman 0,94-2,03 yang berarti memiliki tingkat keanekaragaman yang tinggi. Angka ini juga menunjukan bahwa pada daerah ini tidak ada spesies yang terlalu mendominansi suatu wilayah.Kata kunci: Fitoplankton, Muara sungai, Teluk Manado  

scholarly journals Short Communication: The species diversity and composition of roadside trees in five cities in Sumatra, Indonesia

2018 ◽  
Vol 19 (5) ◽  
pp. 1615-1621 ◽  
Author(s):  
WIRYONO . ◽  
YANSEN . ◽  
ADITYA . ◽  
DAVID JUARA LAMHOT ◽  
JURIAH HUTAHAEAN
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Introduced Species ◽  
Native Species ◽  
Short Communication ◽  
Diversity Index ◽  
Wiener Index ◽  
Abundant Species ◽  
Number Of Individuals ◽  
Aesthetic Values

Wiryono, Yansen, Aditya, Lamhot DJ, Hutahaean J. 2018. Short Communication: The species diversity and composition ofroadside trees in five cities in Sumatra, Indonesia. Biodiversitas 19: 1615-1621. Roadside trees make living in a city more enjoyable dueto their aesthetic values and ecosystem services. The ecological benefits of roadside trees may be enhanced by increasing the speciesdiversity and the proportion of native species. The objective of this study was to know the species diversity and composition of roadsidetrees in the cities of Palembang, Bengkulu, Curup, Pematang Siantar and Argamakmur, in Sumatra Island, Indonesia, varying in size andaltitude. Data of trees were collected from selected streets and analyzed to determine the species richness (S), Shannon-Wiener index ofdiversity (Hʹ) and Ellenberg index of community similarity (ISE). The results showed that the species richness in a city ranged from 7 to26, with the diversity index between 1.05 and 2.08. The large and medium cities had higher S and Hʹ. More introduced species werefound, both in number of species and number of individuals, than the native ones. The similarity among cities in species compositionranged from 47 to 82%. Overall, Swietenia macrophylla, an introduced species, was the most abundant species. The S and Hʹ values ofall cities were considered low and the composition of tree species did not support the conservation of native species. It is, therefore,essential to increase the species diversity of street trees, especially by planting native species.

scholarly journals Hoşrük Çayı (Elazığ-Türkiye) Zooplanktonu

2018 ◽  
Vol 6 (5) ◽  
pp. 607
Author(s):  
Serap Saler ◽  
Songül Yüce ◽  
Burcu Çelik ◽  
Hilal Bulut
Keyword(s):  
Common Species ◽  
Zooplankton Species ◽  
Monthly Basis ◽  
H Index ◽  
Ph Values ◽  
Measuring Devices ◽  
Index Value ◽  
Richness Index ◽  
Number Of Individuals

Samples of zooplankton were taken from Hoşrük Stream between March 2104 and February 2015 at 3 stations on a monthly basis. Water temperature, dissolved oxygen and pH values are determined from the stream by portable measuring devices. Shannon Wiever (H'), Simpson (D) and Margalef (M) index values are calculated monthly using the relevant formulas. A total of 28 zooplankton species were identified during the survey. There are 18 species of Rotifera, 8 species of Cladocera and 2 species of Copepoda. Rotifers took the first place in terms of both number of taxa, number of individuals and frequency of occurrence. Polyarthra dolichoptera from rotifers has been detected in 10 samples and is the most common species among all zooplankton species. Cyclops vicinus from Copepoda was the second dominant species observed for 9 months. May was the month in which the maximum number of taxa (20 species) was recorded, least taxa (2 species) was recorded in January. Shannon Wiever species richness index value (H') reached the highest value of H' = 1.51 in July. The Margalef index value was also calculated as M = 2.22 at the highest at May, Simpson index value D = 0.89 calculated in its highest level at March. Determination of low H' index values were indicating that stream is poor in terms of species diversity.

scholarly journals Spider Diversity in Different Agricultural Crops in Mangoli, Nainital District, Uttarakhand, India

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Jeetikasiddhu Jeetikasiddhu ◽  
Himanshu Pandey Lohani ◽  
Gunjan Pathak ◽  
Buddh Raj Kaushal
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Dominant Species ◽  
Foraging Behaviour ◽  
Diversity Indices ◽  
Agricultural Crops ◽  
Ecological Guilds ◽  
Spider Species ◽  
Vegetable Field ◽  
Number Of Individuals

Investigations were carried out on the species composition of spiders in different agricultural crops viz. red lentil, wheat and mixed vegetables (cabbage, carrot, potato, tomato, pea, black eyed beans) at Mangoli in district Nainital of Kumaun region of Uttarakhand, India. The sampling was done using handpicking, ground hand collection, aerial hand collection and sweep netting method. The investigation revealed the presence of 44 spider species belonging to 16 families and 33 genera. The most dominant species was Argiope pulchella comprises highest numbers of individuals (32) and most dominant family was Araneidae (9species). The highest number of individuals was observed from mix vegetable field (296) followed by wheat (209) and red lentil (181). Based on foraging behaviour, the collected spiders were classified into 7 ecological guilds and majority of collected spiders were orb weavers (37.73%). Diversity indices: Shannon-Weiner’s diversity and species richness of spiders were found to be higher in mixed vegetables crop (3.57, 6.67) followed by wheat (3.47, 6.36) and red lentil crop (3.40, 6.15), respectively.

scholarly journals Effect of physiographic factors on woody species diversity in oak forests (case study: Sardasht forest -Iran)

2018 ◽  
Vol 23 ◽  
pp. 19-27
Author(s):  
J Eshaghi Rad ◽  
A Motallebpour ◽  
A Alijanpour
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Woody Species ◽  
Diversity Indices ◽  
Living Environment ◽  
Slope Aspect ◽  
Oak Forests ◽  
Woody Species Diversity ◽  
The Impact ◽  
Richness Index

Research on species diversity in different gradients of altitudes, aspect and slope is attempting to understand the interactions of vegetation and the non-living environment. The aim of this study was to examine the impact of altitude, slope and aspect variation on the woody species diversity in the Oak forests of Zagros (northern of Iran). 178 samples were taken by using of transect method with a fixed length of 50 m. Altitude, slope, aspect, woody species and diameter at breast height of all trees was recorded in each transect. Margalef richness index, Shannon and Simpson diversity indices and Shannon evenness index were calculated. The Means of the different diversity indices were compared with Kruskal- Wallis test. Results showed that altitude had significant impact on the diversity, richness and evenness of woody species and the middle elevation class (1400 - 1600 m) allocated maximum values of indices. Also, the highest species richness was observed in the (0 - 20%) and (20 - 40%) slope classes but the slope hadn’t effected on the woody species evenness and diversity. The lowest amount of species richness was observed in the east aspect than other aspects. In general, it can be concluded that the altitude had a large proportion of diversity variation than slope and aspect in the research area.J. bio-sci. 23: 19-27, 2015

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