Daily patterns of activity of passerine birds in a Magellanic sub-Antarctic forest at Omora Park (55°S), Cape Horn Biosphere Reserve, Chile

Reyes-Arriagada, Ronnie; Jiménez, Jaime E.; Rozzi, Ricardo

doi:10.1007/s00300-014-1596-5

Cited by 24 publications

(14 citation statements)

References 48 publications

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“…The 2 minute habituation is adequate since birds are not evasive (Deferrari et al 2001). Sampling was carried out during the first 4 hours after dawn, due to the fact that it is the moments of greater social and feeding activity of the birds (Deferrari et al 2001, Reyes-Arriagada et al 2015. Sampling used a direct recognition method, identifying and counting the individuals of each seen species, without limit in the observation range (Lencinas et al 2005).…”

Section: Sampling Design and Data Takingmentioning

confidence: 99%

Assessing the conservation value of nature reserves: terrestrial birds in Isla de los Estados (Staten Island) Provincial Reserve, Tierra del Fuego, Argentina

et al. 2019

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Existing networks of nature reserves contain a biased sample of biodiversity. In Patagonia Argentina, most nature reserves focus their protection objectives on a particular ecosystem, geoform or scenic value, and usually are located in inaccessible areas. However, unique species or assemblages could inhabit less protected ecosystems, areas or habitats, which could be threatened depending of management. In this study, we assessed the conservation value of different ecosystem types and areas (fjords) in Isla de los Estados Provincial Reserve (RPIE, Argentina), using birds as study case. We chose three fjords (east, central and west) and five ecosystems types (forests at low and high elevation, open-lands at low and high elevation, and sea coasts). Bird's assemblage richness, density, biomass, trophic level, migratory status, and use of strata per ecosystems and fjords were characterized in 75 points (3 fjords × 5 ecosystems × 5 replicates) and evaluated using ANOVA and multivariate methods. Also, Shannon (H') and Pielou (J) indices were estimated for fjords and ecosystems. Passerine was the most abundant group, being mainly residents, omnivorous and carnivorous-scavenger, and they were observed mainly flying or in the canopy. Assemblage structure and function varied with ecosystem types, with higher richness and biomass in coasts and open-lands than in other ecosystems, but with greater density in forests. Multivariate analyses showed conspicuous groups for forests and coast sampling units, with significant differences among all ecosystem types except between low and high forests. Also, east fjord significantly differed in density and biomass from the others, but west fjord also differed in structure, function and bird assemblage. We conclude that greater conservation value must be assigned to ecosystem types or areas inhabited by threatened species (as open-lands at high elevation) and highest richness and variety of use of strata (as sea coasts). However, bird assemblage patterns have particularities in less valuable ecosystems and areas, which also justify their importance for conservation, or at least, prescriptions of low impact uses and activities in the management planning. Nature reserves are opportunities to preserve endemic species, habitats or areas of special interest, as low latitude or unique isolated landscape communities, and ecosystems underrepresented in the network of local, regional or world protected areas.

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Section: Sampling Design and Data Takingmentioning

confidence: 99%

Assessing the conservation value of nature reserves: terrestrial birds in Isla de los Estados (Staten Island) Provincial Reserve, Tierra del Fuego, Argentina

et al. 2019

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“…In other regions, however, the seasonal changes in day length, with shorter days in the winter and longer ones during the summer, influence bird activity patterns (Rollfinke and Yahner, 1990;Reyes-Arriagada et al, 2015;Silva et al, 2015). The climate, in particular temperature, but also rainfall, may also affect these patterns (Boyes and Perrin, 2010;Reyes-Arriagada et al, 2015). Similar variation is observed in bats (Speakman et al, 2000;Thies et al, 2006), which are predominantly nocturnal (Presley et al, 2009, Verde et al, 2018.…”

Section: Introductionmentioning

confidence: 77%

“…Tropical birds tend to be active primarily during the early hours of the morning and late afternoon, in a typical bimodal pattern (Gilardi and Munn, 1998;Salina-Melgoza and Renton, 2005;Brandt and Cresswell, 2009;Dias et al, 2016). In other regions, however, the seasonal changes in day length, with shorter days in the winter and longer ones during the summer, influence bird activity patterns (Rollfinke and Yahner, 1990;Reyes-Arriagada et al, 2015;Silva et al, 2015). The climate, in particular temperature, but also rainfall, may also affect these patterns (Boyes and Perrin, 2010;Reyes-Arriagada et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Birds and bats captured in a managed forest in Southwestern Brazilian Amazonia: Results and recommendations from a short-term study

Pedroza¹,

Verde²,

Guilherme³

2019

Braz. J. Biol. Sci.

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Understanding the activity pattern and the height of capture of birds and bats can help to optimize the sampling of both groups. Our aimed was to determine the rates of capture at different times of day/night, and the overlap in the height of capture; classify the trophic guilds, and check variation in the capture rates of the birds and bats. We conducted the study in the Antimary State Forest, in March, 2017. We set mist-nets at the same location during five consecutive days, and were open between 06:00 h and 00:00 h. The birds presented a bimodal activity pattern, as well as bats. Bats were captured at higher levels than birds. Most of the birds captured were insectivores, where as most of the bats were frugivores. Neither group presented a clear pattern of variation in capture rates. Therefore, the first hours of the morning are fundamental for the capture of birds. For bats, we would recommend the captures only after 17:00 h. Mist-nets should be set at ground level for birds, whereas for bats, they should be set above a height of 0.5 m. Thus, the captures should be optimized.

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“…Intra and interspecific competitions among species and individuals in waste disposal sites are common including fighting and stealing of food [33]. As a result, several species [34].…”

Section: Discussionmentioning

confidence: 99%

Assessment of Bird Diversity and Abundance from Waste Disposal Sites in and Around Gubre Subcity, Wolkite Town, Southwestern Ethiopia

Meles¹,

Bogale²

2018

Int J Waste Resour

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Waste disposal sites are predominantly used as feeding sites for generalist birds. The main objective of this study was to assess the diversity and abundance of birds from three waste disposal sites in and around Gubre sub city, Guraghe zone in 2017. Data were collected using point count techniques from 6:00−10:00 a.m. in the morning and 4:00−6:00 p.m. in the afternoon for three consecutive days each in three study sites. During this study, a total of 2566 birds belonging to 17 species, 7 Families and 6 Orders were recorded. From the 17 identified species of birds, 11 species each were from site I and III, while the remaining 7 species were recorded from site II. Among the seven identified families, Accipitridae was numerically the dominant family represented with 7 species, while Columbidae and Scopidae were the least dominant families represented with 1 species each. At species level, Hooded vulture (Necrosyrtes manachus) was the most abundant bird species. The total abundance of birds was significant (ANOVA result, p=0.00) difference among the three sites. In general, highest number of individual birds were counted in site I (1210) followed by site III (974) and site II (382). A significant difference in the abundance of birds between morning and afternoon was also observed (t-test, p=0.044). Greater numbers of birds were counted in morning in all study sites (range: 93 in site II and 651 in site I). Site I was found to be with relatively higher value of species diversity (H'=1.2) than Site III (H'=1.01) and Site II (H'=0.90). In the study area, waste collectors, domestic dogs, cats and vehicles were considered as threats for waste dependent birds. More studies are required to make a complete list of available bird species in the study area.

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Daily patterns of activity of passerine birds in a Magellanic sub-Antarctic forest at Omora Park (55°S), Cape Horn Biosphere Reserve, Chile

Cited by 24 publications

References 48 publications

Assessing the conservation value of nature reserves: terrestrial birds in Isla de los Estados (Staten Island) Provincial Reserve, Tierra del Fuego, Argentina

Assessing the conservation value of nature reserves: terrestrial birds in Isla de los Estados (Staten Island) Provincial Reserve, Tierra del Fuego, Argentina

Birds and bats captured in a managed forest in Southwestern Brazilian Amazonia: Results and recommendations from a short-term study

Assessment of Bird Diversity and Abundance from Waste Disposal Sites in and Around Gubre Subcity, Wolkite Town, Southwestern Ethiopia

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