scholarly journals Predators do not spill over from forest fragments to maize fields in a landscape mosaic in central Argentina

2017 ◽  
Vol 7 (19) ◽  
pp. 7699-7707 ◽  
Author(s):  
Marco Ferrante ◽  
Ezequiel González ◽  
Gábor L. Lövei
Keyword(s):  
Forest Fragments ◽  
Landscape Mosaic ◽  
Central Argentina

scholarly journals Nestedness structure of bird assemblages in a fragmented forest in Central Argentina: the role of selective extinction and colonization processes

2020 ◽  
pp. 17-29
Author(s):  
S. Dardanelli ◽  
M. L. Bellis
Keyword(s):  
Rank Order ◽  
Extinction Risk ◽  
Bird Species ◽  
Forest Fragments ◽  
Species Extinction ◽  
Bird Assemblages ◽  
Central Argentina ◽  
Breeding Seasons ◽  
Avian Assemblages ◽  
Selective Extinction

Nestedness analysis constitutes an important tool to understand the processes that shape wildlife communities. It also allows a quick first evaluation of species extinction proneness in fragmented landscapes. Here, we tested whether avian assemblages in the fragmented Espinal forest exhibited nested subset patterns. Furthermore, we examined whether selective extinction or selective colonization are driving nested subset patterns. We studied avian assemblages in 13 forest fragments in central Argentina during breeding and non–breeding seasons. We completed partial Spearman rank correlations to explore the relationship between nestedness rank order and habitat patch variables and species life history traits related to species extinction proneness and colonization rate. Bird species showed strong nestedness patterns, both for the total incidence matrix and for forest fragments and species separately. Nestedness patterns were similar during the breeding and non–breeding seasons. The nested rank order of forest fragments correlated with area and distance to nearest fragment, both of which are patch characteristics known to increase the probabilities of species extinction. The nested rank order of species was correlated with the minimum area of species requirement, trophic guild, and range size, traits that are linked to extinction risk. Selective extinction processes rather than selective colonization appear to be driving nestedness patterns of bird assemblages in fragmented Espinal forest. The most effective way to preserve forest bird species in the Espinal forest seems to be by protecting the larger fragments of this relictual forest.

DIVERSITY OF MICROCHIROPTERAN BATS IN FOREST FRAGMENTS AND RIPARIAN ZONES IN AN OIL PALM PLANTATION ESTATE

SIMBIOSA ◽  
2014 ◽  
Vol 3 (1) ◽  
Author(s):  
Fauziah Syamsi
Keyword(s):  
Oil Palm ◽  
Riparian Zones ◽  
Habitat Patch ◽  
Forest Fragments ◽  
Oil Palm Plantation

Kelapa sawit merupakan salah satu tanaman meningkat paling pesat di dunia, dan mencakup lebih dari 13 juta ha di Asia Tenggara. Sumatera memiliki sejarah yang relatif panjang budidaya kelapa sawit komersial, dan banyak perkebunan telah menggantikan hutan hujan. Biasanya ini perkebunan monokultur mendukung spesies lebih sedikit daripada hutan, namun ada sangat sedikit informasi yang tersedia untuk kelelawar. Kami mencicipi kelelawar pemakan serangga di Sumatera Barat dalam perkebunan kelapa sawit matang di mana beberapa tutupan hutan dipertahankan di fragmen hutan di bukit-bukit dan di sepanjang sungai. Menggunakan total 180 kecapi perangkap malam kami dibandingkan dengan komunitas kelelawar dalam tiga jenis habitat: patch hutan, zona riparian dan perkebunan. Total kami ditangkap 1108 kelelawar yang mewakili 21 spesies dan 5 keluarga, dan mayoritas ini (dalam hal spesies dan kelimpahan) ditemukan di fragmen hutan. perkebunan kelapa sawit ditemukan menjadi habitat miskin untuk kelelawar - hanya empat orang dari dua spesies ditangkap. daerah pinggiran sungai didukung keanekaragaman menengah, dan mungkin penting sebagai koridor satwa liar antara fragmen hutan. Kata kunci : Biodiversitas, keleawar Microchiropteran

Exposure of Raptors in Central Argentina to St. Louis Encephalitis and West Nile Viruses

2020 ◽  
Vol 54 (3) ◽  
Author(s):  
Ana P. Mansilla ◽  
Claudina Solaro ◽  
Paula M. Orozco-Valor ◽  
Juan M. Grande ◽  
José H. Sarasola ◽  
...  
Keyword(s):  
West Nile ◽  
Central Argentina

Spring-summer movements of male capercaillieTetrao urogallus:A test of the ‘landscape mosaic’ hypothesis

2000 ◽  
Vol 6 (1) ◽  
pp. 251-256 ◽  
Author(s):  
Olav Hjeljord ◽  
Per Wegge ◽  
Jørund Rolstad ◽  
Marina Ivanova ◽  
Alexander B. Beshkarev
Keyword(s):  
Landscape Mosaic

Cenozoic tectonics of the High Andes of west-central Argentina (30–36°S latitude)

1996 ◽  
Vol 259 (1-3) ◽  
pp. 185-200 ◽  
Author(s):  
Victor A. Ramos ◽  
Marcelo Cegarra ◽  
Ernesto Cristallini
Keyword(s):  
Central Argentina ◽  
West Central ◽  
Cenozoic Tectonics

Comparing the potential reproductive phenology between restored areas and native tropical forest fragments in Southeastern Brazil

2021 ◽  
Author(s):  
Débora Cristina Rother ◽  
Igor Lopes Ferreira Sousa ◽  
Eliana Gressler ◽  
Ana Paula Liboni ◽  
Vinícius Castro Souza ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Southeastern Brazil ◽  
Reproductive Phenology ◽  
Forest Fragments

scholarly journals Spatial-Temporal Analysis of the Forest Fragments Surrounding a Conservation Unit in the Southern Region of Brazil

2020 ◽  
Vol 3 (1) ◽  
pp. 48
Author(s):  
Bianca Fernandes ◽  
Ligia Batista
Keyword(s):  
Nearest Neighbor ◽  
Temporal Analysis ◽  
Management Plan ◽  
Edge Density ◽  
Forest Fragments ◽  
Conservation Unit ◽  
Border Effect ◽  
Action Strategies ◽  
Landsat Satellite ◽  
High Degree

In recent years, anthropogenic actions have intensified forest fragmentation, causing several damages to the landscape’s natural components, propagating the loss of biodiversity. This study aims to present an analysis of the forest fragments in a conservation unit located at southern of Brazil. The evaluation was carried out for the years 1998, 2008, and 2018, by using landscape metrics and classification of remote sensing imagery of the Landsat satellite. The following metrics were analyzed: area and edge, shape, core area, and aggregation. The results indicated an increase of 16.88% in the total area of vegetation, and the percentage of fragments increased from 16.16% to 18.89%. The number of fragments decreased, resulting in an increase of the mean area in 5.4 ha. The percentage of vegetation under border effect changed from 40.2% to 37.1%. In 1998, the average nearest neighbor distance was 155.4 m, and in 2018, 149.7 m. However, this distance is still classified as a high degree of isolation, which hinders the movement of organisms and the dispersion of species. Thus, all the analyzed metrics indicated a decrease in the fragmentation, except for the edge density metric, in which its increase of 1.86 pointed to a lower degree of conservation during the analyzed period. A study of this nature is important as it provides subsidies for future researches and can contribute to action strategies to be adopted in the management plan of the area.

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