scholarly journals Recuperation of theTerra FirmeForest Understory Bird Fauna Eight Years after a Wildfire in Eastern Acre, Brazil

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Tatiana Lemos da Silva ◽  
Edilaine Lemes Marques ◽  
Edson Guilherme
Keyword(s):  
Species Richness ◽  
Bird Species ◽  
Forest Fragments ◽  
Bird Species Richness ◽  
Dead Trees ◽  
Significant Difference ◽  
Bird Fauna ◽  
Components Analysis ◽  
Species Richness And Abundance ◽  
And Control

The present study evaluated the characteristics of the understory bird fauna of four fragments ofterra firmeforest in eastern Acre, Brazil, that were impacted by wildfires in 2005. The study investigated the species richness and the composition of trophic guilds using mist-netting on eight transects (four in burned plots and four in control plots in the same forest fragments). Eight plots (0.12 ha) were also established parallel to each transect to record the number of live trees (DBH ≥ 10 cm), palms, and dead trees. Bamboo stems were quantified in 0.024 ha subplots. No significant difference was found between burned and control plots in the species richness or abundance of birds, nor was any significant pattern found in the NMDS ordination of the composition of the communities or guilds. The Principal Components Analysis (PCA) found that the burned plots were physiognomically distinct, due principally to the number of bamboo stems and dead trees. Multiple regressions based on the PCA scores and bird species richness and abundance found no significant trends. The findings of the present study indicate that the understory bird assemblage of the areas affected by a single wildfire in 2005 had almost totally recuperated eight years after this event.

Differences in bird species richness and abundance among three successional stages of aspen-dominated boreal forests

1995 ◽  
Vol 73 (8) ◽  
pp. 1417-1431 ◽  
Author(s):  
Jim Schieck ◽  
Marie Nietfeid ◽  
J. Brad Stelfox
Keyword(s):  
Species Richness ◽  
Boreal Forests ◽  
Bird Species ◽  
Bird Species Richness ◽  
Tree Cavities ◽  
Dead Trees ◽  
Large Trees ◽  
Successional Stages ◽  
Young Forests ◽  
Species Richness And Abundance

Birds and vegetation were surveyed in young, mature, and old aspen-dominated boreal forests in Alberta. Height and size of live trees, density of large dead trees, and volume of downed woody material increased during succession, whereas density of live trees decreased. Canopy heterogeneity had a bimodal relationship with succession: old forests had the highest, mature forests the lowest, and young forests an intermediate canopy heterogeneity. Old forests had greater bird species richness than young forests, which in turn had greater richness than mature forests. Twenty-seven, 3, and 10 bird species had their highest abundances in old, mature, and young forests, respectively. Seven bird species that nest and forage in canopy gaps and three bird species that nest and forage in large trees and snags were more abundant in young and old forests than in mature forests. Contrary to our predictions, patterns of richness and abundance for bird species that nest and forage in the canopy or in tree cavities were similar to those for bird species that nest or forage in the lower strata. Bird species preferring coniferous forests tended to be more abundant in old than in young or mature aspen-dominated forests, possibly because old aspen forests had more conifers than younger aspen forests.

scholarly journals Bird communities in three forest types in the Pernambuco Centre of Endemism, Alagoas, Brazil

2013 ◽  
Vol 103 (2) ◽  
pp. 85-96 ◽  
Author(s):  
Lahert W. Lobo-Araújo ◽  
Mário T. F. Toledo ◽  
Márcio A. Efe ◽  
Ana C. M. Malhado ◽  
Marcos V. C. Vital ◽  
...  
Keyword(s):  
Species Richness ◽  
Bird Species ◽  
Bird Communities ◽  
Northeastern Brazil ◽  
Forest Fragments ◽  
Forest Types ◽  
Risk Of Extinction ◽  
Bird Fauna ◽  
Richness Patterns ◽  
Ombrophilous Forest

The Pernambuco Center of Endemism (PCE) in northeastern Brazil is highly fragmented and degraded. Despite its potential conservation importance the bird fauna in this area is still relatively unknown and there are many remnant fragments that have not been systematically surveyed. Here, we report the results of bird surveys in five forest fragments (one pioneer, two ombrophilous and two seasonal). In total, 162 taxa were recorded, 12 of which are endemic to the PCE. The frequency of endangered species was lower than what has been reported in studies from the same area and most of the taxa considered to be at risk of extinction were sub-species of uncertain taxonomic validity. The comparatively low number of endemic/threatened species may be due to the small size of the fragments in the present study - a consequence of the high levels of habitat loss in this region. Analysis of species richness patterns indicates that ombrophilous forest fragments are acting as refuges for those bird species that are most sensitive to environmental degradation.

Bird assemblages in wildlife habitat strips in a Tasmanian plantation matrix

2002 ◽  
Vol 8 (2) ◽  
pp. 82 ◽  
Author(s):  
Michael A. MacDonald ◽  
Robert J. Taylor ◽  
Steven G. Candy
Keyword(s):  
Species Richness ◽  
Bird Species ◽  
Wildlife Habitat ◽  
Native Forest ◽  
Total Abundance ◽  
Forest Patches ◽  
Bird Species Richness ◽  
Linear Forest ◽  
Significant Difference ◽  
Production Forests

In Tasmania, a system of 100 m wide strips of native forest, referred to as wildlife habitat strips, is retained within production forest, including plantations. Thirty-nine points in 18 wildlife habitat strips within both eucalypt and pine plantations (which were not differentiated for the purposes of the present study) were paired with points in nearby extensive native forest and surveyed for birds. At non-riparian sites (upper slopes and ridges), bird species richness and total abundance were both significantly lower in habitat strips than in controls. This difference is quantitative rather than qualitative, as ordination did not distinguish strip sites and controls, and no species were obviously absent from habitat strips. Riparian zones showed no significant difference in species richness and total abundance between habitat strips and controls. Species richness and total abundance relative to controls increased as wildlife habitat strip length increased over the measured range (0.4-2.1 km). It is thought that this may be because birds perceive strips as linear forest patches rather than corridors, so that there may be a habitat area effect. Other strip characteristics such as width and plantation age were not significant in riparian areas, but may be important on upper slopes and ridges, and the former will affect strip area. Wildlife habitat strips appear to be a valuable component of a conservation programme for birds in production forests in Tasmania.

Associations of Forest Cover, Fragment Area, and Connectivity with Neotropical Understory Bird Species Richness and Abundance

2012 ◽  
Vol 26 (6) ◽  
pp. 1100-1111 ◽  
Author(s):  
Alexandre Camargo Martensen ◽  
Milton Cezar Ribeiro ◽  
Cristina Banks-Leite ◽  
Paulo Inácio Prado ◽  
Jean Paul Metzger
Keyword(s):  
Species Richness ◽  
Forest Cover ◽  
Bird Species ◽  
Bird Species Richness ◽  
Species Richness And Abundance

Effects of crop diversity on bird species richness and abundance in a highland East African agricultural landscape

Ostrich ◽  
2013 ◽  
Vol 84 (1) ◽  
pp. 33-39 ◽  
Author(s):  
P Kariuki Ndang'ang'a ◽  
John BM Njoroge ◽  
Kamau Ngamau ◽  
Wariara Kariuki ◽  
Philip W Atkinson ◽  
...  
Keyword(s):  
Species Richness ◽  
Agricultural Landscape ◽  
Bird Species ◽  
Crop Diversity ◽  
East African ◽  
Bird Species Richness ◽  
Species Richness And Abundance

scholarly journals Ecological Role of a Tree (Gmelina Arborea) Plantation in Guatemala: An Assessment of an Alternative Land use for Tropical Avian Conservation

The Auk ◽  
2007 ◽  
Vol 124 (1) ◽  
pp. 316-330 ◽  
Author(s):  
James A. Rotenberg
Keyword(s):  
Species Richness ◽  
Bird Species ◽  
Positive Association ◽  
Management Plan ◽  
Forest Fragments ◽  
Land Uses ◽  
Gmelina Arborea ◽  
Bird Species Richness ◽  
Tropical Regions ◽  
Grazed Pasture

AbstractEstablished parks and nature reserves may be inadequate to preserve long-term biotic diversity, especially in tropical regions of Latin America where anthropogenic disturbance and land-conversion is an ongoing problem. Demand for economically productive land uses, such as cattle pastures or monoculture plantations, is one of the greatest threats to habitat and wildlife preservation. As a result, conservation biologists have turned to examining attributes of nonprotected lands to determine which land uses both support wildlife and make economic sense. I examined bird use of a plantation of Gmelina arborea (“white teak” or “melina” trees; hereafter “plantation”) in Guatemala to assess its suitability as bird habitat. Gmelina arborea is grown mainly for wood and paper pulp. Several compositionally different habitats were identified, based on the amount of natural vegetation grown within and among the plantation trees, forming a heterogeneous landscape. I detected 195 bird species from 45 families within this plantation-dominated landscape, and 144 species in plantation habitats combined. I observed a positive association between increased vegetative complexity and bird species richness; moreover, bird species richness attained levels statistically indistinguishable from those found in nearby forest fragments. Mixed plantation habitat containing 19–31% natural vegetative coverage supported bird communities that equaled or surpassed levels of species richness found by other researchers in shaded coffee (Coffea spp.) plantations. However, pure stands of G. arborea supported richness levels equal to those of grazed pasture; diversity levels associated with both these land uses were close to those reported for sun coffee plantations. Clearly, native vegetation played a significant role in enhancing bird species richness in the plantation habitat, and amounts of relative cover similar to or exceeding those in the plantation I studied should be considered in any management plan for G. arborea in Central America.Rol Ecológico de Plantaciones de Árboles de Gmelina arborea en Guatemala: Una Evaluación de un Uso Alternativo del Suelo para la Conservación de las Aves Tropicales

MODIS time series as a tool for monitoring fires and their effects on savanna bird diversity

2012 ◽  
Vol 21 (6) ◽  
pp. 680 ◽  
Author(s):  
Noam Levin ◽  
Sarah Legge ◽  
Bronwyn Price ◽  
Michiala Bowen ◽  
Emily Litvack ◽  
...  
Keyword(s):  
Species Richness ◽  
Satellite Imagery ◽  
Bird Species ◽  
Dry Season ◽  
Tree Cover ◽  
Bird Diversity ◽  
Fire Dynamics ◽  
Bird Species Richness ◽  
North West ◽  
Species Richness And Abundance

In this study, we aimed to explore the effect of fires on bird diversity in Australia’s tropical savannas. Bird surveys were conducted at 69 sites between 2005 and 2007 to estimate bird species richness and abundance within the Mornington Sanctuary, the Kimberley, north-west Australia. We used MODIS (Moderate Resolution Imaging Spectroradiometer) and Landsat satellite imagery to map fire scars and to quantify vegetation cover parameters, and QuickBird imagery to map the percentage tree cover. Bird species richness and abundance were higher in areas exhibiting minimum seasonal and interannual changes, e.g. in riparian areas, near water and where tree cover was high. We found a significant negative effect of fire on bird diversity following the extensive late dry-season fires of 2006. These findings support the view that intense and large fires are threatening biodiversity and reinforce the importance of reducing the occurrence of late dry-season fires, which are the most severe and extensive. MODIS satellite imagery was found to provide a cost-effective approach to monitoring savanna landscapes, assessing the state of vegetation and monitoring fire dynamics.

Sign in / Sign up

Export Citation Format

Share Document