scholarly journals Distinctiveness, Use, and Value of Midwestern Oak Savannas and Woodlands as Avian Habitats

The Auk ◽  
2007 ◽  
Vol 124 (3) ◽  
pp. 969-985 ◽  
Author(s):  
Ralph Grundel ◽  
Noel B. Pavlovic
Keyword(s):  
Community Composition ◽  
Threatened Species ◽  
Habitat Type ◽  
Bird Species ◽  
Canopy Cover ◽  
Bird Community ◽  
Woody Vegetation ◽  
Oak Savannas ◽  
Vegetation Gradient ◽  
Forest Habitats

Abstract Oak savannas and woodlands historically covered millions of hectares in the midwestern United States but are rare today. We evaluated the ecological distinctiveness and conservation value of savannas and woodlands by examining bird distributions across a fire-maintained woody-vegetation gradient in northwest Indiana encompassing five habitats—open habitats with low canopy cover, savannas, woodlands, scrublands, and forests—during migration, breeding, and overwintering. Savannas and woodlands were significantly different in overall bird species composition from open and forest habitats but were often intermediate between open and forest in guild densities. Few bird species were consistently and highly concentrated in savannas or woodlands, and the Red-headed Woodpecker (Melanerpes erythrocephalus) was the only species significantly more abundant in savannas and woodlands than in open, scrub, and forest habitats. Fire frequency over a 15-year interval was a significant predictor of bird community composition and was positively related to species diversity, spring transient migrant density, and density of the most threatened species. Each habitat type had characteristics potentially important for avian conservation. Scrub had the highest density of transient migrants, which suggests it plays an important role as migration stopover habitat. More species were significantly concentrated in open or forest habitats than in the other habitats. Lack of species concentration and intermediate community composition suggested that birds experienced savannas and woodlands more as ecotones than as habitats distinct from forests or grasslands. However, this intermediate character can benefit conservation, as evidenced by savannas and woodlands having the highest density of the most threatened species along this woody-vegetation gradient. Características Únicas, Uso y Valor de las Sabanas y Bosques Abiertos de Roble del Oeste Central como Hábitats para las Aves

scholarly journals Fire effects on the composition of a bird community in an amazonian Savanna (Brazil)

2005 ◽  
Vol 65 (4) ◽  
pp. 683-695 ◽  
Author(s):  
R. Cintra ◽  
T. M. Sanaiotti
Keyword(s):  
Species Richness ◽  
Community Composition ◽  
Spatial Scales ◽  
Bird Species ◽  
Bird Community ◽  
Fire Effects ◽  
Bird Abundance ◽  
Bird Species Richness ◽  
Byrsonima Crassifolia ◽  
Mist Net

The effects of fire on the composition of a bird community were investigated in an Amazonian savanna near Alter-do-Chão, Pará (Brazil). Mist-net captures and visual counts were used to assess species richness and bird abundance pre- and post-fire in an approximately 20 ha area. Visual counts along transects were used to survey birds in an approximately 2000 ha area in a nearby area. Results using the same method of ordination analysis (multidimensional scaling) showed significant effects of fire in the 20 ha and 2000 ha areas and strongly suggest direct effects on bird community composition. However, the effects were different at different spatial scales and/or in different years, indicating that the effects of fire vary spatially and/or temporally. Bird community composition pre-fire was significantly different from that found post-fire. Using multiple regression analysis it was found that the numbers of burned and unburned trees were not significantly related to either bird species richness or bird abundance. Two months after the fire, neither bird species richness nor bird abundance was significantly related to the number of flowering trees (Lafoensia pacari) or fruiting trees (Byrsonima crassifolia). Since fire is an annual event in Alter-do-Chão and is becoming frequent in the entire Amazon, bird community composition in affected areas could be constantly changing in time and space.

scholarly journals The frequency method in studying habitat preferences of common forest birds

2021 ◽  
Vol 27 (2) ◽  
Author(s):  
Dawid Jan Sikora
Keyword(s):  
Habitat Preferences ◽  
Habitat Type ◽  
Bird Species ◽  
Bird Community ◽  
Average Frequency ◽  
Occurrence Frequency ◽  
Frequency Method ◽  
Black Alder ◽  
Age Class ◽  
Bird Census

This paper presents the results of a study on the habitat preferences of selected species of the bird community in the Morgi Forest, the Kolbuszowa Forest Division (SE Poland), with the use of the point-stand bird census method. The aim of the study was to test the effectiveness of the method in determining the frequency of colonisation of stands with different habitat parameters by the most abundant bird species. In 270 tree stands of a forest complex with diverse habitats, a bird census was carried out with four counts per each stand. Next, a list of the tree stands and the bird species recorded in the stands was compiled. The stands were divided into categories according to the forest habitat type, dominant species and age class. In the next step, the occurrence frequency of the most abundant bird species was calculated for each stand category. Among the analysed species, the majority showed a positive correlation between the frequency of occurrence and habitat fertility. The influence of the dominant stand species on the occurrence frequency of bird species was largely driven by habitat fertility. The lowest average frequency of the identified avian species was found in stands dominated by pine Pinus sylvestris, birch Betula sp. and black alder Alnus glutinosa. There was generally a positive relationship between age class and the bird community parameters. It is concluded that the point-stand method of bird census provides informative results for research on the habitat selectivity of bird populations.

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 Forest and biodiversity: a multiscale analysis of forest bird community in Varese district

2013 ◽  
Vol 82 (1-2) ◽  
Author(s):  
Alessandra Gagliardi ◽  
Damiano Preatoni ◽  
Fabio Saporetti ◽  
Guido Tosi
Keyword(s):  
Community Composition ◽  
Landscape Metrics ◽  
Environmental Variables ◽  
Multiscale Analysis ◽  
Bird Species ◽  
Bird Community ◽  
Multiscale Approach ◽  
Forest Bird ◽  
Area Data

Forests represent more than 45% of the Varese district area. Data of forest bird community composition are correlated with the appearance of woods. With a multiscale approach (1 km2 units and territories) some landscape metrics are analysed, in order to evaluate the influence of environmental variables on bird species.

scholarly journals Search Tactics of Insectivorous Birds Foraging in an Australian Eucalypt Forest

The Auk ◽  
1986 ◽  
Vol 103 (3) ◽  
pp. 515-530 ◽  
Author(s):  
Richard T. Holmes ◽  
Harry F. Recher
Keyword(s):  
Habitat Structure ◽  
Temperate Forest ◽  
Prey Capture ◽  
Bird Species ◽  
Bird Community ◽  
Insectivorous Birds ◽  
Community Patterns ◽  
Eucalypt Forest ◽  
Eucalyptus Forest ◽  
Forest Habitats

Abstract The different ways birds searched for food in an Australian Eucalyptus forest led them to detect and capture different kinds of prey. Five major searching modes were identified among 23 common, mostly insectivorous bird species. These were distinguished largely by the rates, distances, and angles moved by birds while foraging and by their prey-capture behavior. Some bird species typically moved slowly, visually examining substrates at relatively long distances, and then took flight to capture prey (e.g. whistlers, flycatchers, muscicapid robins, cuckoos). Others moved at more rapid rates and either gleaned small prey from nearby substrates (e.g. thornbills, treecreepers) or flushed insects that were then pursued (e.g. fantails). Two species (Eastern Shrike-Tit, Falcunculus frontatus; White-eared Honeyeater, Meliphaga leucotis) were specialized substrate-restricted searchers, seeking invertebrate and carbohydrate foods among the exfoliating bark of Eucalyptus. The search tactics of birds in this south temperate Australian forest were similar to those of birds in a north temperate forest in New Hampshire, USA, previously reported by Robinson and Holmes (1982). The differences in food-searching behavior between these phylogenetically distinct avifaunas (e.g. search flight and prey-attack flight lengths, hop/flight ratios, foraging rates) reflect the effects of unique foliage structures (e.g. spacing of branches, arrangements of leaves) and food resources at each site. These findings support the hypothesis that habitat structure and food availability provide opportunities and constraints on how birds search for and capture food in forest habitats. These in turn are postulated to affect the success of particular bird species exploiting those habitats and thus influence bird community patterns.

scholarly journals Bird Diversity Unconsciously Increases People’s Satisfaction with Where They Live

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 153
Author(s):  
Lauren Hepburn ◽  
Adam C. Smith ◽  
John Zelenski ◽  
Lenore Fahrig
Keyword(s):  
Urban Areas ◽  
Bird Species ◽  
Canopy Cover ◽  
Bird Community ◽  
Well Being ◽  
Tree Canopy ◽  
Tree Cover ◽  
Bird Diversity ◽  
Neighbourhood Satisfaction ◽  
Tree Canopy Cover

There is growing evidence that exposure to nature increases human well-being, including in urban areas. However, relatively few studies have linked subjective satisfaction to objective features of the environment. In this study we explore the links among objective environmental features (tree cover, water, and bird diversity) and subjective judgements of satisfaction. We surveyed residents of Ottawa, Canada (n = 1035) about their satisfaction with their local neighbourhoods. We then compared the survey responses to measures of nature near their homes, including bird diversity (number of bird species), tree canopy cover, and distance to water. After controlling for effects of income and subjective happiness, residents’ neighbourhood satisfaction was positively related to the number of bird species nearby, even before participants were prompted to consider nature. Residents’ appreciation of their local neigbourhood relative to others also increased with tree canopy cover and nearness to water. Unsolicited comments from participants following the survey indicated that while residents consciously appreciate trees and water, the relationship between bird diversity and neighbourhood satisfaction appears to be unconscious; very few of the participants mentioned birds. Based on these results, we speculate that a diverse local bird community may provoke feelings of satisfaction through their presence, activity, and songs. Our results create a compelling argument for city planners and individual residents to maintain bird-friendly spaces in urban areas.

scholarly journals Bird Assemblages in Second-Growth and Old-Growth Forests, Costa Rica: Perspectives From Mist Nets and Point Counts

The Auk ◽  
2001 ◽  
Vol 118 (2) ◽  
pp. 304-326 ◽  
Author(s):  
John G. Blake ◽  
Bette A. Loiselle
Keyword(s):  
Costa Rica ◽  
Community Composition ◽  
Threatened Species ◽  
Bird Species ◽  
Old Growth ◽  
La Selva ◽  
Point Counts ◽  
Old Growth Forest ◽  
Second Growth ◽  
Old Growth Forests

Abstract Second growth has replaced lowland forest in many parts of the Neotropics, providing valuable habitat for many resident and migrant bird species. Given the prevalence of such habitats and the potential benefit for conservation of biodiversity, it is important to understand patterns of diversity in second growth and old growth. Descriptions of species-distribution patterns may depend, however, on method(s) used to sample birds. We used data from mist nets and point counts to (1) describe species diversity and community composition in second-growth (young and old) and old-growth forests at La Selva Biological Station, Costa Rica; and (2) to evaluate perspectives on community composition provided by the two methods. We recorded 249 species from 39 families, including 196 species captured in mist nets (10,019 captures) and 215 recorded during point counts (15,577 observations), which represents ∼78% of the terrestrial avifauna known from La Selva (excluding accidentals and birds characteristic of aquatic or aerial habitats). There were 32 threatened species, 22 elevational migrants, and 40 latitudinal migrants. Species richness (based on rarefaction analyses of capture and count data) was greatest in the youngest site. Latitudinal migrants were particularly common in second growth; elevational migrants were present in both young and old forest, but were more important in old-growth forest. Several threatened species common in second growth were not found in old-growth forests. Trophic composition varied less among sites than did species composition. Mist nets and point counts differed in numbers and types of species detected. Counts detected more species than nets in old-growth forest, but not in young second growth. Mist nets detected 62% of the terrestrial avifauna, and point counts detected 68%. Fifty-three species were observed but not captured, and 34 species were captured but not observed. Six families were not represented by mist-net captures. Data from mist nets and point counts both support the conclusion that second-growth vegetation provides habitat for many species.

scholarly journals Conserving native trees increases native bird diversity and community composition on commercial office developments

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Karen Dyson
Keyword(s):  
Community Composition ◽  
Environmental Gradients ◽  
Bird Species ◽  
Bird Community ◽  
Bird Communities ◽  
Bird Diversity ◽  
Bird Conservation ◽  
Tree Protection ◽  
Matrix Habitat ◽  
Site Use

Abstract In cities, woody vegetation provides critical shelter, nesting and foraging habitat for bird species of interest. Human actions—including development and landscaping choices—determine vegetation community composition and structure, making these choices critically important to urban bird conservation. A better understanding of how bird communities are impacted by parcel-scale actions can help guide policy and management best practices to improve matrix habitat quality and quantity. Here, I examined how bird habitat use varies along a vegetation gradient created by different development and landscaping choices. I surveyed 20 commercial office developments near Seattle in the Puget Trough region of Washington, USA selected using stratified random sampling, where I quantified bird communities and observed feeding behavior. I used GLMM and PERMANOVA models with data likelihood metrics to identify the best supported variables for bird site use, along with TITAN models to identify changes in community composition along environmental gradients. I found that measures of bird effective species richness and bird community are positively influenced by the presence of more native conifers, including the presence of a stand predating development and the height and density of native conifers. Measures of the native bird community are negatively influenced by higher non-native tree density. In contrast to prior research, top-down landscape-scale variables did not explain variation in measures of the bird community on office developments. Importantly, I found that birds are associated with the same habitat on office developments as observed elsewhere. Together, my findings suggest an important role for developers, land owners, landscape architects, and tree protection policy in bird conservation.

scholarly journals Birds surveyed in the harvested and unharvested areas of a reduced-impact logged forestry concession, located in the lowland subtropical humid forests of the Department of Santa Cruz, Bolivia

Check List ◽  
2007 ◽  
Vol 3 (1) ◽  
pp. 43 ◽  
Author(s):  
Adam Felton ◽  
Bennett A. Hennessey ◽  
Annika M. Felton ◽  
David B. Lindenmayer
Keyword(s):  
Community Composition ◽  
Bird Species ◽  
Bird Community ◽  
Font Size ◽  
Santa Cruz ◽  
Wet Season ◽  
Point Count ◽  
Logging Effects ◽  
Logged Forest ◽  
Reduced Impact Logging

As part of a larger study of reduced-impact logging effects on bird community composition, we surveyed birds from December to February during the 2003-2004 wet-season within harvested and unharvested blocks of the La Chonta forestry concession, Department of Santa Cruz, Bolivia. The logged forest was harvested using reducedimpact logging techniques between one and four years previously. During point count surveys, we identified 5062 individual birds, belonging to 155 species, and 33 families. We provide a list of bird species found within the harvested and unharvested blocks of the concession for the benefit of other researchers assessing the responses of Neotropical avifauna to disturbance, and to facilitate increased understanding of the diverse bird assemblages found within the lowland subtropical humid forests of Bolivia. 

scholarly journals KEANEKARAGAMAN DAN KEMERATAAN BURUNG PADA BERBAGAI TIPE HABITAT DI DESA ARTAIN KECAMATAN ARANIO KABUPATEN BANJAR KALIMANTAN SELATAN

2021 ◽  
Vol 9 (2) ◽  
pp. 405
Author(s):  
Basuki Rahman ◽  
Abdi Fithria ◽  
Basir Achmad ◽  
Danang Biyatmoko
Keyword(s):  
Secondary Forest ◽  
Habitat Type ◽  
Bird Species ◽  
Observation Point ◽  
Primary Forest ◽  
Secondary Forests ◽  
And Function ◽  
The Village ◽  
Primary Forests ◽  
Forest Habitats

Artain is a village located opposite the Riam Kanan reservoir in Aranio District, Banjar Regency, South Kalimantan Province. There are various types of habitat in the Village, from the edge of a reservoir to primary forest which is thought to be home to various birds species, which over time has the potential to degrade or change due to human activity which then reduces its quality and function as habitat for many birds species. It is necessary to research the diversity and evenness of birds in each habitat type in Artain, so that the existence of various bird species can be known. The research was conducted from May to June 2020, the method used in the study was the cruising circumference point, which is determining the observation point and its radius and then making observations by exploring the observation path continue. The results showed that there were 9 types of bird's habitat in Artain, they are Settlements, Periphery Reservoirs, Shrubs, Mixed Gardens, Rubber Gardens, Reeds, Fields, Secondary Forests, and Primary Forests. The lowest diversity value (H' = 1.25) was identified in field habitats and the highest (H' = 3.17) in scrub habitats, meaning that the level of diversity in all habitats was classified as moderate. The lowest evenness value in secondary forest habitats (E = 0.80) and the highest is mixed garden habitats and rubber gardens (E = 0.97), which means that evenness in each habitat is in the high category.

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