scholarly journals A preliminary study on species composition, relative abundance and distribution of bird species in Choke Mountains, East Gojjam, Ethiopia

2018 ◽  
Vol 10 (12) ◽  
pp. 517-526
Author(s):  
Takele Bewketu ◽  
Afework Bezawork
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Bird Species ◽  
Preliminary Study ◽  
Abundance And Distribution

scholarly journals A Preliminary Survey of Amphibians and Reptiles in around Gulbarga University Campus, Karnataka, India

2014 ◽  
Vol 27 ◽  
pp. 67-71
Author(s):  
Murali Jadesh ◽  
Parshuram Kamble ◽  
K. Manjunath ◽  
K. Ravikiran ◽  
Sharanappa Padashetty
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Survey Methods ◽  
Preliminary Survey ◽  
University Campus ◽  
Visual Estimation ◽  
Abundance And Distribution

The study involves survey of amphibian and reptile in and around Gulbarga University Campus. Survey was conducted from Jan 2012 to March 2013. The survey methods involved careful visual estimation of amphibians and reptilian in all the possible habitats present in the study area. The objective of the study included evaluate of species composition, relative abundance and distribution of amphibian and reptile of the chosen area. During survey a total of 16 species of herpetofauna identified belonging to 12 families, which includes 9 species of snakes, 4 species amphibians, 3 species of lizards

scholarly journals Transformation of the community of nesting birds in the process of reorganization of the forest ecosystem into a park

2019 ◽  
Vol 30 (1) ◽  
pp. 3-13 ◽  
Author(s):  
V. A. Gaychenko ◽  
T. V. Shupova
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Forest Ecosystem ◽  
Bird Species ◽  
Bird Communities ◽  
Individual Species ◽  
Natural State ◽  
Forest Steppe ◽  
Ecological Groups ◽  
Anthropogenic Landscapes

Changes in nesting conditions cause a change in the number of individual species, ecological groups, and, consequently, the structure of the bird community. The purpose of the study is to analyze the possibilities and directions – the transformations of the communitys of nesting birds in the process of reorganization of the forest ecosystem into a park. The material was collected in the territory of one of the forest parks in the Kiev city. Forest is an mixed based on Quercus robur L., Carpinus betulus L., Acer platanoides L., Tilia cordata L., Fraxinus excelsior L. There are individual trees Pinus Syvestris L. The territory of the forest park have different degrees transformed, and includes anthropogenic landscapes and forests plots that have been preserved almost in their natural state. Studies were conducted in the nesting period (April-June) 2012–2017. For analysis average data were used. The number and distribution of the birds were determined by the method of counting on the transects, in the 3 model plots. There are 71 species of birds of 11 orders. Of these, 63 species are nesting. The number of nested species of communities in model plots does not depend on the gradient of anthropogenic transformation, but a average density of nesting birds decrease: 2.91±0.66→2.54±0.67→2.10±0.48 pairs / km of the transect. Nesting birds are distributed between 9 faunogenetic complexes. Of these, in each model plot is represented by 8. Dominated by birds of the European nemoral complex. On the gradient of habitat transformation, a change in the fauna-genetic structure of bird communities in the direction of increasing the proportion of birds of the European nemoral and European forest-steppe complexes, birds of desert-mountain and tropical groups. Boreal and ancient species are superseded. Strengthening the transformation in forest plots, the distribution of birds in community on the ecological groups does change not much. But when the forest ecosystem is replaced by a park ecosystem, the proportion of sclerophiles increases 3–4 times. In all communities is dominated by woody nesters bird. On the gradient of transformation, the number of species of the tree canopies nesters birds (from 21 to 18), ground nesters birds (from 6 to 0), species that use many types of nesting stations (from 4 to 1) are decreases; the number of bird species that nesting in the buildings increases from 0 to 6, and the number of alien species from 0 to 4 (Streptopelia decaocto, Dendrocopos syriacus, Phoenicurus ochruros, Serinus serinus). In the park ecosystems, a decrease in the species composition of woodpeckers, does not entail a significant decrease in the species composition and abundance of secondary hollows nesters birds. Birds of the synanthropic subpopulations are nesting in cavities in park buildings. Most of the indices show an equivalent ά-diversity of all bird communities. The β-diversity of breeding birds during the transformation of the forest ecosystem into a park is reduced by half. Ranked distribution curves of the abundance of species are indicate abrupt changes in the balance of dominance-diversity in communities when a transformation are in the forest ecosystem. The dominant species pressure high are give in community, its abundance is 2.2–2.7 times higher than the abundance of the second species by the abundance. In a slightly transformed forest, this indicator is 1.1 times. Ranked curves of relative abundance of species are a more sensitive index of community transformation than data of indices by the dominance and of species distribution. The introduction into the forest ecosystem of even a small number of anthropogenic structures leads to a significant increase in the relative abundance of synanthropic birds. In our study, in to 2 times. On the gradient of the transformation the absolute number of nesting species of the synanthropic birds increases gradually: 30–33–36; the obligate synanthropic species more stronger: 0–2–7; the index of community synanthropization increases 1.5 times: 0.63–0.72–0.92.

scholarly journals Species Composition, Relative Abundance and Distribution of Rodents in Wof-Washa Natural State Forest, North Shewa, Amhara, Ethiopia

2020 ◽  
Author(s):  
Mulu Negesse Dadi ◽  
Dereje Yazezew Mammo ◽  
Gezahegn Degefe Teferedegn ◽  
Gezahegn Getachew Zelelew
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Management Plan ◽  
Shannon Index ◽  
Dry Season ◽  
Rodent Species ◽  
Natural State ◽  
Plantation Forest ◽  
Wet Season ◽  
Abundance And Distribution

Abstract Background: The species composition, relative abundance and distribution of rodents were studied in Wof-Washa Natural State Forest, Ethiopia from December 2016 to May 2017 during dry and wet seasons. A total of 49 Sherman live traps were set per grid at 10 m intervals in permanent 4900 m2 (70mx70m) live trapping grids established in intact forest, disturbed forest, Erica woodland, plantation forest and Farmland habitats. Result: A total of 621 individuals of rodents were captured in 2,560 trap nights by using both live traps and snap traps. Seven species of rodents in family Muridae were recorded. Out of the total rodents caught in the study period, Stenocephalemys albipes, Pelomys harringtoni and Lophuromys flavopunctatus are endemics to Ethiopia. Plantation forest had the highest mean trapping success whereas the lowest trap success was in the Erica woodland. The distribution of rodent species was significantly differed (P<0.05) among studied habitats. Higher trap success was recorded in dry season (26.2) than the wet season (24.4). The highest value of Shannon index was recorded in plantation forest (H’ = 1.82) followed by farmland habitat (H’ =1.67) during the wet season and the lowest value was observed in the intact forest (H’ = 0.67) and Erica woodland (H’ = 0.67) during the dry season. From the total catch, adults comprised 260(41.9%), sub-adults 248(39.9%) and juveniles 113(18.2%).Conclusion: The present study provides the first valuable demonstration on the species composition, relative abundance and distribution of rodents in the WWNSF. Further monitoring and inventory of small mammals is warranted to document and conserve the different endemic and endangered rodent species to designing important biodiversity management plan in the area.

scholarly journals Abundance and Diversity of Birds in the Ogbese Forest Reserve, Ekiti State, Nigeria

2019 ◽  
pp. 1-9
Author(s):  
O. O. Ogunyemi
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Bird Species ◽  
Natural Forest ◽  
Vegetation Types ◽  
Plantation Forest ◽  
Forest Reserve ◽  
Dry Seasons ◽  
Abundance And Diversity ◽  
Wet And Dry Seasons

A study was carried out to evaluate the species composition and relative abundance of bird species of the natural and plantation forest of Ogbese Forest Rserve, Ekiti State. The study was conducted from April, 2010 to February, 2011 covering both wet and dry seasons. Sample sites were stratified based on the vegetation types and transect count techniques was employed for the evaluation. A total of 52 bird species consisting of 47 resident and 5 immigrant species was recorded. The species composition of birds during the wet and dry seasons was not significantly different. The natural forest vegetation had the highest species diversity and evenness. The relative abundance score of species during the Wet and dry seasons was variable in both habitats. The result of this study has shown that the natural and plantation vegetation types of Ogbese Forest Reserve, Ekiti State. The heterogeneity of flora species in the natural forest compared to the plantation forest might be responsible for the variation. The management of birds in the reserve should take cognisance of the vegetation types for effective conservation of bird species which are resident in the reserve.

scholarly journals Species composition, relative abundance, and distribution of land snail species in Mt. Lantoy Key Biodiversity Area, Cebu, Philippines

2020 ◽  
Vol 21 (11) ◽  
Author(s):  
RAAMAH ROSALES ◽  
EDGARDO LILLO ◽  
STEVE MICHAEL ALCAZAR ◽  
LEA COLITA ◽  
JOED CABALLERO ◽  
...  
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Land Snail ◽  
Land Snails ◽  
Permanent Plots ◽  
Snail Species ◽  
Widespread Species ◽  
Group Order ◽  
Abundance And Distribution ◽  
Number Of Individuals

Abstract. Rosales R, Lillo E, Alcazar SM, Colita L, Caballero J, Malaki AB. 2020. Species composition, relative abundance, and distribution of land snail species in Mt. Lantoy Key Biodiversity Area, Cebu, Philippines. Biodiversitas 21: 5438-5447. This study aimed to establish an inventory of land snails in Mt. Lantoy, Cebu Island, Philippines. A two-person team conducted sampling on eight permanent plots with an elevation range of 182 m-691 m. The study has listed a total of 872 individuals represented by 25 species belonging to 15 genera and nine families. Seven families belong to the air-breathing pulmonate group, Order Stylommatophora: Bradybaenidae, Camaenidae, Trochomorphidae, Achatinidae, Ariophantidae, Helicarionidae, Helicinidae. Two families were under the prosobranch group, Order Caenogastopoda: Cyclophoridae, and Pupinidae. The Cyclophoridae was the richest family with five species, followed by Bradybaenidae, Camaenidae, Helicinidae, having four species. The Trochomorphidae and Helicarionidae have three species. The Pupinidae has two species, while the Achatinidae and Ariophantidae has one species each. There were three (3) endemic and ten (10) new island record species collected and identified with four (4) species that were classified as rare. Rysotta otaheitana Ferussac 1821 was the most abundant, representing 25.22% of the total number of individuals. The Leptoma nitidum ancilis Bartsch 1918 has the widest geographical distribution with a constancy rate of 100%. Widespread species appear to be more abundant, while other species were geographically restricted in few study areas.

scholarly journals Diversity of bird communities of the forest in the Boyarska experimental station at the gradient of anthropic load

2020 ◽  
Vol 11 (3) ◽  
Author(s):  
V.A. Gaychenko ◽  
◽  
T.V. Shupova ◽  
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Conservation Status ◽  
Bird Species ◽  
Parus Major ◽  
Diversity Indices ◽  
Bird Communities ◽  
Experimental Station ◽  
Α Diversity ◽  
Synanthropization Index

Bird communities was researched according to the transect method in the nesting period of 2013 and 2015. 4 model forest plots in the Boyarskaya Experimental Station were selected. All of them are culturelphytocenoses based onPinus sylvestris L., Quercus robur L., Q. rubra L. The species composition of birds, their abundance, α-diversity indices, synanthropization index of bird communities (to Jedryctkowski) were analyzed. The similarity of bird communities was determined using cluster analysis in "Origin Pro 9.0". 65 bird species of 11 orders were recorded. 35 species of them live in the species reserve. On model plots that not have conservation status, the number of species in bird communities is 20–27. In plots with a dominance of Q. robur, 42 species were recorded, with a dominance of P. sylvestris - 35 species of the birds. Dominants in bird communities Parus major L. and Fringilla coelebs L. The presence in the list of subdominants Anthus trivialis L. and Phylloscopus sibilatrix Bechstein is a positive characteristic of the forest. The synanthropic of bird communities increases according to the increase in anthropic load: the synanthropization index from 0.4 to 0.65, the relative abundance of synanthropic birds in communities from 0.66 to 0.81. There are no alien birds. The species diversity and the number of bird species in the communities decreases along the gradient of increasing anthropic load. The similarity of bird communities and their α-diversity depends by the anthropic load, and not by the ratio of the species composition of the forest trees. The distribution of relative abundance of species in bird communities, on the contrary, is associated with the ratio of the species composition of trees. In forest plots dominated by P. sylvestris, bird communities are balanced, in plots with a predominance of Q. robur, disturbances in the development of bird communities are noticeable.

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