scholarly journals Mangrove bird community of Paranaguá Bay - Paraná, Brazil

2007 ◽  
Vol 50 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Luiz Augusto Macedo Mestre ◽  
Ricardo Krul ◽  
Valéria dos Santos Moraes
Keyword(s):  
Human Impacts ◽  
Bird Species ◽  
Passer Domesticus ◽  
Bird Community ◽  
Abundant Species ◽  
Marine Conservation ◽  
Point Counts ◽  
Flying Insects ◽  
Paranaguá Bay ◽  
Conservation Plans

This study describes the mangrove bird community of Paranaguá Bay in Paraná - South Brazil. Seasonal surveys were conducted during September 1997 to September 1998 at three sites in Paranaguá Bay. Frequencies and abundances of birds were registered in 200m transects and one hour point counts. A total of 81 bird species were observed in the three sampling sites. Most of the bird species in Paranaguá mangroves are fruits, seeds and arthropods consumers, and predators of flying insects. The most frequent and abundant species were Egretta caerulea, Ceryle torquata, Chloroceryle amazona, Pitangus sulphuratus, Turdus amaurochalinus and Parula pitiayumi. The bird community of these three sites is composed mainly by forest bird species. The mangroves of Paranaguá Bay shelter one of the richest avifauna of Brazilian mangroves. Differences between sampling sites could be related to the proximity of the Paranaguá city and human impacts in the areas. Only in the most disturbed site were observed Passer domesticus and large flocks of Coragyps atratus. This study contributed to the knowledge of mangrove communities, and could be an important basis to fluvial-marine conservation plans in Paraná- Brazil.

scholarly journals Spatial and temporal patterns of bird species diversity in the Pantanal of Mato Grosso, Brazil: implications for conservation

2006 ◽  
Vol 66 (2a) ◽  
pp. 393-404 ◽  
Author(s):  
J. E. C. Figueira ◽  
R. Cintra ◽  
L. R. Viana ◽  
C. Yamashita
Keyword(s):  
Human Impacts ◽  
Bird Species ◽  
Bird Community ◽  
The Other ◽  
Resident Species ◽  
Spatial And Temporal Patterns ◽  
Mato Grosso ◽  
Bird Survey ◽  
Bird Species Diversity ◽  
Habitat Generalists

Analysis of a three-year bird survey in the pantanal of Poconé revealed that most of the resident and seasonal birds are habitat generalists, using two or more habitats. In this study, previously sampled habitats were ranked in relation to species richness and stability (as measured by the ratio of seasonal to resident species). In all, nine habitats were grouped into three categories; results are as follows: 1) forests: more species-rich and more stable; 2) cerrado: intermediate levels; and 3) aquatic: less species-rich and less stable. The number of seasonal species remained relatively constant in forests throughout the year, while increasing in the other habitats during the dry season. The abundance of resident species seems to be related to species use of multiple habitats. Although many species were found to be habitat generalists, we discuss possible consequences of habitat loss and other human impacts on efforts to conserve this important bird community.

scholarly journals Tropical forest remnants as shelters of avian diversity within a tourism development matrix in Yucatan Peninsula, Mexico

2018 ◽  
Vol 66 (2) ◽  
pp. 799
Author(s):  
Jorge E. Ramírez-Albores ◽  
Marlín Pérez-Suárez
Keyword(s):  
Tropical Forest ◽  
Diversity Index ◽  
Bird Species ◽  
Tourism Development ◽  
Bird Community ◽  
Quintana Roo ◽  
Bird Diversity ◽  
Point Counts ◽  
Land Use Types ◽  
Forest Remnants

Tropical forests have undergone extensive transformation because of increasing tourism development, in addition to historic clearing for agricultural and cattle grazing activities. Altogether, these activities have had an important effect on bird diversity, reducing the habitat available to many species. In this study, the role of tropical forest remnants located between different land use types was evaluated for species diversity, composition, and distribution of the bird community at Akumal region in Quintana Roo, Mexico. Point counts were used to quantify the avifauna by habitat, and Shannon´s and Simpson´s diversity index were used to determine bird diversity. Additionally, bird species were classified according to seasonality and trophic guild by type of habitat. A total of 160 species and 50 families was recorded, of which 100 species were permanent residents, 47 winter visitors and 11 transients. Mature tropical forest and tropical forest remnants had higher species richness than those of modified environments. This study supports the importance of tropical forest remnants as shelters for bird species in landscapes with tourism developments, and the relevance of these remnants to maintaining high bird diversity. Rev. Biol. Trop. 66(2): 799-813. Epub 2018 June 01.  

Bird occupancy and richness in ponderosa pine forests with contrasting forest structure and fire historyThis article is one of a selection of papers from the Special Forum on Ecological Studies in Interior Ponderosa Pine — First Findings from Blacks Mountain Interdisciplinary Research.

2008 ◽  
Vol 38 (5) ◽  
pp. 936-942 ◽  
Author(s):  
T. Luke George ◽  
Steve Zack
Keyword(s):  
Species Richness ◽  
Ponderosa Pine ◽  
Prescribed Burning ◽  
Bird Species ◽  
Bird Community ◽  
American Robin ◽  
Point Counts ◽  
Ponderosa Pine Forests ◽  
Silvicultural Treatments ◽  
Silvicultural Treatment

We compared the effects of two contrasting silvicultural treatments and prescribed fire on bird occupancy at Blacks Mountain Experimental Forest. Each silvicultural treatment was applied to two approximately 100 ha units within each of three blocks. Prescribed burning was applied to one-half of each silvicultural treatment in a split-plot design. Occupancy was estimated at eight points in each plot for 11 bird species and three foraging guilds (bark gleaners, woodpeckers, and foliage gleaners). The frequencies of species detections on the point counts were used to estimate species richness on each plot. Occupancy did not differ among treatments for any of the guilds. Four of the 11 bird species, the American robin ( Turdus migratorius L., 1766), the chipping sparrow ( Spizella passerina (Bechstein, 1798)), the white-breasted nuthatch ( Sitta carolinensis Latham, 1790), and the western tanager ( Piranga ludoviciana (A. Wilson, 1811)), showed responses to the treatments. Species richness did not differ between the silvicultural or the burn treatments. The general lack of response of the bird community to the silvicultural and burn treatments is likely a result of the relatively large size of the trees and snags retained on both silvicultural treatments, the low intensity of the prescribed burns, and the lack of a strong contrast in tree density between the silvicultural treatments.

scholarly journals Efecto de la estructura del cultivo de palma de aceite Elaeis guineensis (Arecaceae) sobre la diversidad de aves en un paisaje de la Orinoquía colombiana

2017 ◽  
Vol 65 (4) ◽  
pp. 1569 ◽  
Author(s):  
Diana Patricia Tamaris ◽  
Hugo Fernando López ◽  
Nabhi Romero
Keyword(s):  
Oil Palm ◽  
Elaeis Guineensis ◽  
Group Structure ◽  
Bird Species ◽  
Bird Community ◽  
Trophic Group ◽  
Abundant Species ◽  
Natural Ecosystems ◽  
Line Transects ◽  
Suitable Habitats

The expansion of oil palm plantations has caused drastic changes in natural ecosystems and modifications in the vegetation structure, reducing available habitat for native bird species. We studied birds associated with oil palm plantations plots of different palm size classes, in the foothills of the Colombian Orinoquia region, from August 2013 and February 2014. The palm size clases were three: small up to 6 m height; medium up to 10 m; and large up to 15 m; in each plot we counted birds through line transects, and compared their bird composition, richness, and abundance, and described trophic group structure. We recorded a total of 468 individuals, belonging to 44 bird species and 23 families. Gymnomystax mexicanus, Crotophaga ani and Milvago chimachima were the most abundant species, the first tow representing 4.5 % of the abundant species; 25 % had intermediate abundances and 70.4 % were rare in the plantations area. In terms of the abundance of bird species, medium and large palms plots were more similar. Bird community found in plots with large palms had the highest diversity and uniformity (2.63 and 0.8907, respectively), while in those of small palms it was a greater dominance and abundance of individual birds (0.1825 and 252, each one). For the entire plantation, insectivorous and carnivorous birds predominated, and had greater association with small and large palms. Oil palm stands serve as suitable habitats for a small number of widespread bird species, and the height does not seem to be an important factor, that may meaningfully benefit the composition, richness and abundance of bird species associated with the plantations.

Diversity of bird feeding guilds in relation to habitat heterogeneity and land-use cover in a human-modified landscape in southern Mexico

2012 ◽  
Vol 28 (4) ◽  
pp. 369-376 ◽  
Author(s):  
Esteban Pineda-Diez de Bonilla ◽  
Jorge L. León-Cortés ◽  
José Luis Rangel-Salazar
Keyword(s):  
Land Use ◽  
Habitat Heterogeneity ◽  
Bird Species ◽  
Bird Community ◽  
Bird Diversity ◽  
Feeding Guilds ◽  
Fragmented Landscape ◽  
Secondary Forests ◽  
Southern Mexico ◽  
Point Counts

Abstract:Habitat heterogeneity is an important ecological determinant of species richness. We evaluated the diversity within bird feeding guilds as related to habitat heterogeneity and land-use cover in a human-modified tropical landscape. To quantify this process, fine-scale bird census and habitat heterogeneity data were collected for a bird community in a 22.5-km2fragmented landscape in southern Mexico. Land-use cover data derived from field surveys were used to calculate habitat heterogeneity index values and the extent of each land-use cover type in 239 grid cells of 300 × 300 m. Bird diversity values were obtained based on 1195 point-counts in these cells. Product-moment correlations and linear regression analyses were used to evaluate the relationship between bird-guild diversity values and habitat heterogeneity. A total of 109 resident bird species grouped in six feeding guilds were recorded: insectivores (42%), frugivores (21%), granivores (17%), nectarivores (9%), omnivores (8%) and carnivores (3%). Diversity values for the entire bird community were significantly positively related to habitat heterogeneity, but feeding guilds showed contrasting responses to habitat heterogeneity and the amount of land-use cover: insectivores and frugivores were more diverse and abundant in secondary forests than in any other land-cover. Our findings illustrate the importance of small landscape fragments as potential key refuges for the most diverse and specialized feeding guilds, such as granivores and insectivores.

scholarly journals Population density and structure of a breeding bird community in a suburban habitat in the Cuvelai drainage system, northern Namibia

2021 ◽  
pp. 313-320
Author(s):  
G. Kopij
Keyword(s):  
Diversity Index ◽  
Drainage System ◽  
Bird Species ◽  
Passer Domesticus ◽  
Bird Community ◽  
Breeding Birds ◽  
Population Densities ◽  
Feeding Guild ◽  
Breeding Bird ◽  
Shannon’S Diversity Index

In a suburb (c. 100 ha) of Ongwediva, a total of 30 breeding bird species were recorded in 2018. Shannon’s Diversity Index was 2.01. Passer domesticus comprised almost half of all breeding pairs (36.4 pairs / 10 ha). Granivores were by far the most numerous feeding guild, comprising 77.5 % of all birds breeding. Birds nesting on/in buildings were represented by two species only, but they comprised almost half (49.9 %) of all breeding birds. In comparison with other southern African towns, the number of bird species breeding in Ongwediva was low. This was compensated by high population densities of some species.

scholarly journals Large-scale tree mortality from Rapid Ohia Death negatively influences avifauna in lower Puna, Hawaii Island, USA

The Condor ◽  
2019 ◽  
Vol 121 (2) ◽  
Author(s):  
Richard J Camp ◽  
Dennis A LaPointe ◽  
Patrick J Hart ◽  
Daniel E Sedgwick ◽  
Lisa K Canale
Keyword(s):  
Large Scale ◽  
Tree Mortality ◽  
Bird Community ◽  
Abundant Species ◽  
Metrosideros Polymorpha ◽  
Vascular Wilt ◽  
Point Counts ◽  
Canker Pathogen ◽  
Hawaii Island ◽  
The Impact

Abstract ‘Ōhi’a lehua (Metrosideros polymorpha) is the principle tree species in forests across the Hawaiian Islands and provides critical foraging and nesting habitat for native passerines. Rapid Ohia Death (ROD), caused by the vascular wilt fungus Ceratocystis lukuohia and the canker pathogen C. huliohia, was first detected in the Puna District of Hawaii Island in 2010. It affects all life stages of ‘ōhi’a and as of July 2018 had spread to an estimated 40,469 ha across Hawaii Island. To determine the impact of ROD on the forest bird community we conducted point counts in lowland ‘ōhi’a forest in 2016 and compared them to counts from 2003 to 2004, before the appearance of ROD. We found an increase in species diversity and a significant decrease in the densities of a native Hawaiian honeycreeper, the Hawaii Amakihi (Chlorodrepanus virens), and the nonnative Japanese White-eye (Zosterops japonicus). Yellow-fronted Canary (Crithagra mozambica) and Saffron Finch (Sicalis flaveola), 2 nonnative passerines associated with the shrub layer and more open habitats, were only detected in 2016. Proportion of survey points occupied were comparable between survey periods, but relative abundances were generally lower. Hawaii Amakihi densities declined by 79% and Japanese White-eye densities declined by 33%. Our findings suggest that the loss of ‘ōhi’a canopy due primarily to ROD has adversely affected populations of native Hawaii Amakihi and nonnative Japanese White-eye, 2 of the most abundant species of lowland Hawaiian forests.

scholarly journals Composition and structure of bird communities in vegetational gradients of Bodoquena Mountains, western Brazil

2016 ◽  
Vol 88 (1) ◽  
pp. 211-225 ◽  
Author(s):  
MAURICIO N. GODOI ◽  
FRANCO L. SOUZA ◽  
RUDI R. LAPS ◽  
DANILO B. RIBEIRO
Keyword(s):  
Vegetation Type ◽  
Bird Species ◽  
Bird Community ◽  
Bird Communities ◽  
Bird Diversity ◽  
Bird Conservation ◽  
Natural Habitats ◽  
Bird Abundance ◽  
Point Counts ◽  
Composition And Structure

ABSTRACT The informations of bird species distribution in different habitats and the structure of their communities are crucial for bird conservation. We tested the differences in composition, richness and abundance of birds in different phytophysiognomies at Bodoquena Mountains, western Brazil, and we demonstrated the variations in richness and abundance of birds between different trophic groups. Sampling was conducted between July 2011 and June 2012 in 200 point counts arranged in the study area. A total of 3350 contacts were obtained belonging to 156 bird species. Woodland savannas, seasonal forests and arboreal savannas had higher bird abundance and richness, while riparian forests, clean pastures and dirty pastures had smaller values of these parameters. The bird community was organized according to local vegetational gradient, with communities of forests, open areas and savannas, although many species occurred in more than one vegetation type. The insectivorous, omnivorous, frugivorous and gramnivorous birds composed most of the community. These data showed how important environmental heterogeneity is to bird communities. Furthermore, the presence of extensive patches of natural habitats, the small distance between these patches and the permeability of pastures, with high arboreal and shrubby cover, are indicated as important factors to maintain the bird diversity.

scholarly journals [The ornithological breeding community in the Oasis of Arcola (Sp)]

2020 ◽  
Vol 90 (1) ◽  
Author(s):  
Simone Todisco ◽  
Stefania Cassano ◽  
Pamela O’Shaughnessy ◽  
Marco Gustin
Keyword(s):  
Bird Species ◽  
Parus Major ◽  
Bird Community ◽  
Alnus Glutinosa ◽  
Abundant Species ◽  
Community Dwelling ◽  
Heterogeneous Environments ◽  
Salix Alba ◽  
Natural Habitats ◽  
The One

[The waterways Rivers, especially in lowland areas, often result the elements of highest naturalistic value and play an important role as ecological corridors. Rivers are characterized by high dynamism and biological complexity, and the distribution of several bird species often depends on their physical characteristics and water velocity. During spring 2018, we studied the bird community dwelling in the Arcola Reserve, managed by Lipu, in province of La Spezia (NW Italy), included within the Montemarcello Magra Regional Natural Park (SCZ IT1343502). This site presents a portion of plain woodland with presence of arboreal substrate dominated by Alnus glutinosa, Populus nigra, Populus alba, Salix alba, and a portion consisting of scattered trees, xeric meadows with shrubby formations comprising Rosa canina, Rubus sp., Spartium junceum, Prunus spinosa. Besides, rare reed formations are present. In the 20 hectares of the study area, we carried out field samplings through 8 monitoring sessions since April 23th until June 26th 2018. Overall, we found 62 species of which only 32 were (potentially, probably or certainly) nesting inside the reserve (22 belonging to Passerines and 10 to the non-Passerines species). Nightingale Luscinia megarhynchos (16.87 ± 4.37 individuals), Blackcap Sylvia atricapilla (16 ± 1.41 individuals), Cetti’s Warbler Cettia cetti (13 ± 2.06 individuals), Melodious Warbler (11.88 ± 6.88 individuals), Blackbird Turdus merula (10.75 ± 1.30 individuals) and Great Tit Parus major (9.88 ± 4.04 individuals) were the most abundant species. The density was 62.97 pairs/10 ha, whereas diversity resulted 2.47, this evidencing a considerable degree of complexity, while the evenness value suggests a certain degree of homogeneity in the abundance of the surveyed species. Five dominant species were present. Although the Passerines resulted the most important order in the community, also the non-Passerines showed a value higher than the one reported by other authors, although in less heterogeneous environments. Less than one third of the breeding species resulted to be long migrant species. Results of the present study represent a first step towards the increased knowledge about the avian community of the Arcola Reserve, especially addressed to its administrators as to highlight the need of preserving natural habitats and associated animal and plant species].   [Article in Italian]

scholarly journals The distribution of breeding birds in the Küçük Menderes Delta in western Turkey

Acrocephalus ◽  
2010 ◽  
Vol 31 (145-146) ◽  
pp. 115-130
Author(s):  
Fethi Bengil ◽  
Bariş Uzilday ◽  
Mehmet Siki
Keyword(s):  
Bird Species ◽  
Passer Domesticus ◽  
Aegean Sea ◽  
Breeding Birds ◽  
Human Disturbances ◽  
Western Turkey ◽  
Point Counts ◽  
The Status ◽  
Hippolais Pallida ◽  
Seasonally Flooded

The distribution of breeding birds in the Küçük Menderes Delta in western TurkeyBetween 3 and 18 May, 2008, the status and distribution of breeding birds in Küçük Menderes Delta on the coast of the Aegean Sea in western Turkey was investigated. The 49 km2large study area was divided into 49 1 × 1 km UTM squares. In all squares, 2-3 point counts, i.e. a total of 139 counts, were conducted. From a total of 54 bird species for which breeding evidence was obtained, 19 species (35%) were classified as possible breeding and 23 (43%) as probably breeding birds, while for 12 species (22%) breeding was confirmed. The current distribution of all breeding species is presented in maps. Crested LarkGalerida cristata, Cetti's WarblerCettia cetti, House SparrowPasser domesticusand Olivaceous WarblerHippolais pallidawere found in > 50% of all squares. More than 10 breeding species were found in squares containing different aquatic and seasonally flooded habitats along the shore-line of the Aegean Sea and in the surroundings of brackish and freshwater lakes, while in many squares, which contain large portions of agriculturally used land and salt mud-flats, less than 10 breeding species were recorded. Low numbers of breeding waterbirds in the Delta are attributed to the burning of reedbeds during the nesting season and human disturbances, like recreation activities and illegal bird shooting.

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