scholarly journals Biological proliferation of 137Cs to forest bird species in a forest ecosystem

2015 ◽  
Vol 64 (1) ◽  
pp. 55-61
Author(s):  
Masashi MURAKAMI ◽  
Takao SUZUKI ◽  
Nobuhito OHTE ◽  
Nobumasa ISHII
Keyword(s):  
Forest Ecosystem ◽  
Bird Species ◽  
Forest Bird

scholarly journals Relationships between spectral and bird species rarefaction curves in a brutian pine forest ecosystem

2017 ◽  
Vol 18 (3) ◽  
pp. 232-240
Author(s):  
İbrahim Özdemir ◽  
Ahmet Mert ◽  
Ulaş Yunus Özkan ◽  
Şengül Aksan ◽  
Yasin Ünal
Keyword(s):  
Forest Ecosystem ◽  
Bird Species ◽  
Pine Forest ◽  
Rarefaction Curves

scholarly journals Evidence of change in a low-elevation forest bird community of Hawai'i since 1979

2003 ◽  
Vol 13 (3) ◽  
pp. 175-187 ◽  
Author(s):  
Michelle H. Reynolds ◽  
Richard J. Camp ◽  
Bonnie M. B. Nielson ◽  
James D. Jacobi
Keyword(s):  
Native Species ◽  
Bird Species ◽  
Bird Community ◽  
Natural Area ◽  
Present Evidence ◽  
Forest Bird ◽  
Bird Survey ◽  
Elevational Range ◽  
Abundance And Distribution ◽  
Avian Disease

We evaluated the abundance and distribution of low-elevation forest birds on windward Hawai'i Island during August 1993-February 1994, and present evidence of changes in the species composition of the forest bird community since 1979. Endemic Hawaiian birds occurred in native-dominated forests as low as 120 m elevation. Non-native species were detected at all survey locations. We observed non-native Saffron Finch Sicalis flaveola, previously unrecorded in Puna. Variable circular plot surveys of Kahauale'a Natural Area Reserve indicated the disappearance of two native species ('I'iwi Vestiaria coccinea and 'O'u Psittitostra psittacea), and two non-native additions (Red-billed Leiothrix Leiothrix lutea and Kalij Pheasant Lophura leucomelana) to the study area since the Hawai'i Forest Bird Survey conducted in 1979. We present evidence that native 'Elepaio Chasiempsis sandwichensis has experienced a decrease in population density and an elevational range contraction since 1979. Surveys indicate Puna's forest bird community has had increasing aliens and declining native species since 1979. The persistence of some native bird species within the range of avian disease vectors such as Culex quinquefasciatus in forests below 1,000 m elevation presents an important enigma that requires additional study.

scholarly journals Habitat and population estimates of some threatened lowland forest bird species in Tambopata, south-east Peru

2004 ◽  
Vol 14 (4) ◽  
pp. 261-277 ◽  
Author(s):  
HUW LLOYD
Keyword(s):  
Bird Species ◽  
Selective Logging ◽  
Floodplain Forest ◽  
Primary Forest ◽  
Population Estimates ◽  
Lowland Forest ◽  
Density Estimates ◽  
Forest Bird ◽  
Madre De Dios ◽  
Forest Habitats

Surveys of threatened lowland forest bird species and forest habitats were conducted during a 21-month census of lowland bird communities in Tambopata, Department of Madre de Dios, south-east Peru. A combination of distance sampling census methods and direct counts was used for the census in five sites located along the Rio Madre de Dios and Rio Tambopata. All five sites consisted of different forest types with significantly different habitat components. Three of these sites were classified as primary forest habitats whilst the remaining two were classified as disturbed forests. Population densities were calculated for eight of the threatened species recorded during the census. Density estimates of non-bamboo specialists were higher in primary forest habitats than in disturbed forest habitats. Density estimates of most bamboo specialists were higher in primary Old Floodplain forest with extensive bamboo understorey than in primary Middle/Upper Floodplain forest with smaller, patchy areas of bamboo understorey. Calculation of regional population estimates based on the amount of forest cover from satellite photographs shows that only two of the threatened bird species have substantial populations currently protected by the Parque Nacional Bahuaja-Sonene and Reservada Nacional de Tambopata. Selective logging operations that reduce overall tree biomass and remove a large proportion of palm tree species from primary forest habitats will have an adverse affect on local populations of four of the threatened bird species in the region.

scholarly journals The birds of Korup National Park and Korup Project Area, Southwest Province, Cameroon

1994 ◽  
Vol 4 (1) ◽  
pp. 1-68 ◽  
Author(s):  
Paul G. Rodewald ◽  
Pierre-André Dejaifve ◽  
Arthur A. Green
Keyword(s):  
National Park ◽  
Bird Species ◽  
Montane Forest ◽  
Lowland Forest ◽  
Separate Species ◽  
Forest Reserve ◽  
Project Area ◽  
Forest Bird ◽  
Korup National Park ◽  
First Time

A total of 390 bird species are known to occur in the Korup National Park (KNP) and the surrounding Korup Project Area (KPA). Although the avifauna of KNP is incompletely known, it is already among the most ornithologically diverse lowland forest sites i n Africa. The avian diversity of the KPA is increased by the montane forest bird species of the Rumpi Hills Forest Reserve (RHFR) and the Nta Ali Forest Reserve (NAFR). The lowland and montane forests of the KNP/KPA are very important to the conservation of African forest birds. Four species found in the Korup area are considered globally threatened, and four are considered near-threatened. In addition, 40 species were considered for threatened status, some of which are likely future additions to the threatened list. Twelve of Korup's 36 montane forest bird species are endemic to the montane areas of western Cameroon, eastern Nigeria, and Bioko (Fernando Po). The RHFR is especially important as a refuge for montane birds because much of the montane forest elsewhere in western Cameroon has been cleared for agriculture. Breeding phenology data are provided for many lowland forest species. Additionally, this report provides information on many rarely recorded species for western Cameroon, including several species not previously documented in the region. Kemp's Longbill Macrosphenus ketnpi was recorded for the first time in Cameroon. Because it is sympatric with the Yellow Longbill M. flavicans in Korup, additional evidence now exists for the contention that M. ketnpi and M.flavicans are separate species. The Yellow-chested Apalis Apalisflavidawas also documented for the first time in Cameroon.

scholarly journals Dominance and Diversity of Bird Community in Floodplain Forest Ecosystem

2015 ◽  
Vol 63 (3) ◽  
pp. 825-833
Author(s):  
Karel Poprach ◽  
Jana Vrbková
Keyword(s):  
Forest Ecosystem ◽  
Forest Ecosystems ◽  
Sustainable Forest Management ◽  
Natural Habitat ◽  
Habitat Type ◽  
Bird Species ◽  
Bird Community ◽  
Bird Communities ◽  
Floodplain Forest ◽  
Community Interest

The paper is aimed to assessment of diversity and structure of bird community in floodplain forest ecosystem. Authors present results of analyses data on bird communities obtained at two transects in the Litovelské Pomoraví Protected Landscape Area (Czech Republic) in the period 1998–2012. Research of bird communities was carried out using the point-count method. The article deals with qualitative and quantitative representation of breeding bird species, including their relation to habitat type (closed floodplain forest, ecotone). Altogether 63 breeding species were recorded at the Vrapač transect and 67 at the Litovelské luhy transect, respectively. To be able to detect all recorded species, 11 out of 14 years of monitoring were needed at the Vrapač transect and all 8 years of monitoring at the Litovelské luhy transect, respectively. Authors show that the values in dominant bird species change significantly among the particular census dates within one season, mainly with respect to their activity and detectability. Results are discussed in the frame of sustainable forest management in floodplain forest ecosystems. The presented article can promote to discussion aimed to management strategy for floodplain forest ecosystems, which ranks among natural habitat types of Community interest protected under the Natura 2000 European network.

scholarly journals Asynchronous diversification and distinct demographic trajectories in Ethiopian montane forest bird (Aves: Passeriformes) populations separated by the Great Rift Valley

2021 ◽  
Author(s):  
Joseph Manthey ◽  
Yann Bourgeois ◽  
Yonas Meheretu ◽  
Stephane Boissinot
Keyword(s):  
Population Differentiation ◽  
Rift Valley ◽  
Bird Species ◽  
Genomic Variation ◽  
Genomic Diversity ◽  
Whole Genome Sequencing Data ◽  
Dispersal Ability ◽  
Forest Bird ◽  
Biogeographic Barrier ◽  
Great Rift Valley

Taxon-specific characteristics and extrinsic climatic and geological forces may both shape population differentiation and speciation. In geographically and taxonomically focused investigations, differentiation may occur synchronously as species respond to the same external conditions. Conversely, when evolution is investigated in taxa with largely varying traits, population differentiation and speciation is complex and shaped by interactions of Earth’s template and species-specific traits. As such, it is important to characterize evolutionary histories broadly across the tree of life, especially in geographic regions that are exceptionally diverse and under pressures from human activities such as in biodiversity hotspots. Here, using whole-genome sequencing data, we characterize genomic variation in populations of six Ethiopian Highlands forest bird species separated by a lowland biogeographic barrier, the Great Rift Valley (GRV). In all six species, populations on either side of the GRV exhibited significant but varying levels of genetic differentiation. Species with lower dispersal ability generally had higher levels of population differentiation. Divergence dating indicated asynchronous population differentiation histories, with at least three distinct diversification periods. We found that demographic histories—estimated for each individual—varied by both species and population but were consistent between individuals of the same species and sampling region. We found that genomic diversity varied by half an order of magnitude across species, and that this variation could largely be explained by the harmonic mean of effective population size over the past 200,000 years. Overall, we found that even in highly dispersive species like birds, the GRV acts as a substantial biogeographic barrier.

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