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Piotr Tryjanowski - One of the best experts on this subject based on the ideXlab platform.
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foraging efficiency of white Stork ciconia ciconia significantly increases in pastures containing cows
Acta Oecologica-international Journal of Ecology, 2020Co-Authors: A Zbyryt, Tim H Sparks, Piotr TryjanowskiAbstract:Abstract Recent changes in agriculture have had a very strong impact on avian populations, but detailed mechanistic explanations are scarce. Some proposed solutions to avian declines can be complicated because responses are not linear. For example, abandoning pasture management can be detrimental to many open-nesting birds, but also to some others, because livestock perform ecosystem engineering, changing sward height and creating microhabitats for invertebrates, as well as for insectivorous mammals. Both these features affect the foraging efficiency of birds, for example white Stork Ciconia ciconia. We studied the foraging activities of Storks in the presence and absence of grazing cows, and we show that in extensive farmland in NE Poland, the presence of cows has a highly significant effect on Stork foraging efficiency (in our study area mainly catching insects), which may be crucial to improving breeding success. Our results may also be important from a practical point of view. In white Stork recovery projects where supplementary food is offered to Storks (e.g. chicken and fish provided on feeding platforms) we believe that establishing extensive cattle pastoralism would be better from an ecological as well as from an aesthetical viewpoint.
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foraging efficiency of white Stork ciconia ciconia significantly increases in pastures containing cows
Acta Oecologica-international Journal of Ecology, 2020Co-Authors: A Zbyryt, Tim H Sparks, Piotr TryjanowskiAbstract:Abstract Recent changes in agriculture have had a very strong impact on avian populations, but detailed mechanistic explanations are scarce. Some proposed solutions to avian declines can be complicated because responses are not linear. For example, abandoning pasture management can be detrimental to many open-nesting birds, but also to some others, because livestock perform ecosystem engineering, changing sward height and creating microhabitats for invertebrates, as well as for insectivorous mammals. Both these features affect the foraging efficiency of birds, for example white Stork Ciconia ciconia. We studied the foraging activities of Storks in the presence and absence of grazing cows, and we show that in extensive farmland in NE Poland, the presence of cows has a highly significant effect on Stork foraging efficiency (in our study area mainly catching insects), which may be crucial to improving breeding success. Our results may also be important from a practical point of view. In white Stork recovery projects where supplementary food is offered to Storks (e.g. chicken and fish provided on feeding platforms) we believe that establishing extensive cattle pastoralism would be better from an ecological as well as from an aesthetical viewpoint.
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Foraging of White Stork Ciconia ciconia in Forests – The Heritage of an Ancient Behaviour?
Polish Journal of Ecology, 2018Co-Authors: Piotr Tryjanowski, Grzegorz Grzywaczewski, A ZbyrytAbstract:The white Stork Ciconia ciconia is a typical open-area species, foraging mainly in farmland and wetland areas. The main aim of this paper was to describe the foraging ecology of white Storks inside un-typical habitat, i.e. forests in Poland. Data on white Stork feeding in forests were based on responses to questionnaires distributed to several national mailing lists with a total of 1700 (16% subscribers) and via emails to naturalists (mainly to white Stork researchers). In total 63 observations, from the years 2000–2015, were collected, mainly from eastern Poland. In all cases, only a single adult individual was recorded inside the forest, with a mean (±SD) distance to the forest edge of 50 ± 102 m (n = 597) and 1315 ± 1015 m (n = 63) to the nearest white Stork nest. Birds foraging inside forests were recorded from late May to mid-August, but the greatest numbers were seen during June. The main prey was a lizard, the slow-worm Anguis fragilis, with a maximum of 10 individuals collected by a Stork during one foraging session. We discuss the origin of the observed foraging behaviour, noting that the species is flexible and opportunistic in terms of consumed food. The observed foraging is probably similar to the original behaviour of the species within primeval forest, although food opportunism helps the white Stork to use new foraging areas, for example landfills.
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the economic recreational value of a white Stork nesting colony a case of Stork village in poland
Tourism Management, 2014Co-Authors: Mikolaj Czajkowski, Jakub Kronenberg, Marek Giergiczny, Piotr TryjanowskiAbstract:In this paper, we estimate the economic value of selected ecosystem services provided by white Storks in a Polish ‘Stork village’. A Stork village is a common name for a village with a white Stork breeding colony, often inhabited by more Storks than people. Zywkowo, the best known Stork village in Poland, receives approximately 2000–5000 tourists annually, many of whom come from abroad. The village has approximately 20–40 white Stork nests and several amenities designed to improve its recreational attractiveness. To estimate the economic benefits provided by the Stork village, we apply the Travel Cost Method (TCM). This study is the first of this type for a Stork village and the first related to the value of birds in Poland. Our results represent a useful contribution to tourism management, indicating that nature has economic value and illustrating how this value can be translated into economic benefits. It also serves as a clear illustration that the degradation of nature may entail economic losses.
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the economic value of a white Stork nesting colony a case of Stork village in poland
2012Co-Authors: Mikolaj Czajkowski, Jakub Kronenberg, Marek Giergiczny, Piotr TryjanowskiAbstract:In this paper we estimate the economic value of selected ecosystem services provided by White Storks in a Polish ‘Stork village’. A Stork village is a common name for a village with a White Stork breeding colony, often inhabited by more Storks than people. Zywkowo, the best known Stork village in Poland, receives 2000–5000 tourists annually, many of whom come from abroad. The village has about 20–40 White Stork nests and several amenities aiming at improving its recreational attractiveness. To estimate the economic benefits provided by the Stork village we apply the travel cost method. This is the first study of this kind for a Stork village, and the first study related to the value of birds in Poland. Our results provide a useful input into policy and decision making, indicating that nature has economic value. It also serves as a clear illustration that degradation of nature may entail economic losses.
Martina Carrete - One of the best experts on this subject based on the ideXlab platform.
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A protective nesting association with native species counteracts biotic resistance for the spread of an invasive parakeet from urban into rural habitats
Frontiers in Zoology, 2020Co-Authors: Dailos Hernández-brito, Guillermo Blanco, José Luis Tella, Martina CarreteAbstract:Background Non-native species are often introduced in cities, where they take advantage of microclimatic conditions, resources provided by humans, and competitor/predator release to establish and proliferate. However, native communities in the surrounding rural or natural areas usually halt their spread through biotic resistance, mainly via top-down regulative processes (predation pressure). Here, we show an unusual commensal interaction between exotic and native bird species that favours the spread of the former from urban to rural habitats. Results We show how Monk parakeets Myiopsitta monachus , an invasive species often introduced in cities worldwide, associated for breeding with a much larger, native species (the white Stork Ciconia ciconia ) to reduce predation risk in central Spain, thus allowing their colonization of rural areas. Parakeets selected Stork nests close to conspecifics and where breeding raptors were less abundant. Parakeets always flushed when raptors approached their nests when breeding alone, but stayed at their nests when breeding in association with Storks. Moreover, when Storks abandoned a nest, parakeets abandoned it in the following year, suggesting that Storks actually confer protection against predators. Conclusions Our results show how a protective-nesting association between invasive and native species can counteract biotic resistance to allow the spread of an invasive species across non-urban habitats, where they may become crop pests. Monk parakeet populations are now growing exponentially in several cities in several Mediterranean countries, where they coexist with white Storks. Therefore, management plans should consider this risk of spread into rural areas and favour native predators as potential biological controllers.
José Luis Tella - One of the best experts on this subject based on the ideXlab platform.
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A protective nesting association with native species counteracts biotic resistance for the spread of an invasive parakeet from urban into rural habitats
Frontiers in Zoology, 2020Co-Authors: Dailos Hernández-brito, Guillermo Blanco, José Luis Tella, Martina CarreteAbstract:Background Non-native species are often introduced in cities, where they take advantage of microclimatic conditions, resources provided by humans, and competitor/predator release to establish and proliferate. However, native communities in the surrounding rural or natural areas usually halt their spread through biotic resistance, mainly via top-down regulative processes (predation pressure). Here, we show an unusual commensal interaction between exotic and native bird species that favours the spread of the former from urban to rural habitats. Results We show how Monk parakeets Myiopsitta monachus , an invasive species often introduced in cities worldwide, associated for breeding with a much larger, native species (the white Stork Ciconia ciconia ) to reduce predation risk in central Spain, thus allowing their colonization of rural areas. Parakeets selected Stork nests close to conspecifics and where breeding raptors were less abundant. Parakeets always flushed when raptors approached their nests when breeding alone, but stayed at their nests when breeding in association with Storks. Moreover, when Storks abandoned a nest, parakeets abandoned it in the following year, suggesting that Storks actually confer protection against predators. Conclusions Our results show how a protective-nesting association between invasive and native species can counteract biotic resistance to allow the spread of an invasive species across non-urban habitats, where they may become crop pests. Monk parakeet populations are now growing exponentially in several cities in several Mediterranean countries, where they coexist with white Storks. Therefore, management plans should consider this risk of spread into rural areas and favour native predators as potential biological controllers.
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Age‐related environmental sensitivity and weather mediated nestling mortality in white Storks Ciconia ciconia
Ecography, 2004Co-Authors: Roger Jovani, José Luis TellaAbstract:We studied environmental sensitivity and mortality related to weather inclemency in white Stork nestlings Ciconia ciconia in their southern European boundary (Donana, SW Spain). The study of homeothermy acquisition and fault bars (i.e. a measure of stress on feathers) revealed that Stork nestlings were specially sensitive to environmental conditions occurring before 20 d of age. Accordingly, most of nestling mortality concentrated during this sensitive period: 91% of deaths corresponded to nestlings younger than 20 d, 73% concentrating on nestlings up to 10 d-old. Nestling mortality and total breeding failure were highly variable among years, being especially high when rainy periods coincided with the early live of nestlings (between 1 April and 15 May). Maximum temperatures had a positive correlation with breeding success and nestling survival but this effect disappeared when controlling for rainfall. Our results are in agreement with previous studies conducted in other white Stork populations in other latitudes. We suggest that this could be the result of a low homeothermy capacity of young nestlings jointly with an early breeding phenology that expose white Storks to rain, but not to high temperatures. In the context of global climate change we suggest that the current decrease on spring rainfall could increase nestling survival while punctual rainy springs could have a negative effect on the reproduction of white Storks.
Dailos Hernández-brito - One of the best experts on this subject based on the ideXlab platform.
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A protective nesting association with native species counteracts biotic resistance for the spread of an invasive parakeet from urban into rural habitats
Frontiers in Zoology, 2020Co-Authors: Dailos Hernández-brito, Guillermo Blanco, José Luis Tella, Martina CarreteAbstract:Background Non-native species are often introduced in cities, where they take advantage of microclimatic conditions, resources provided by humans, and competitor/predator release to establish and proliferate. However, native communities in the surrounding rural or natural areas usually halt their spread through biotic resistance, mainly via top-down regulative processes (predation pressure). Here, we show an unusual commensal interaction between exotic and native bird species that favours the spread of the former from urban to rural habitats. Results We show how Monk parakeets Myiopsitta monachus , an invasive species often introduced in cities worldwide, associated for breeding with a much larger, native species (the white Stork Ciconia ciconia ) to reduce predation risk in central Spain, thus allowing their colonization of rural areas. Parakeets selected Stork nests close to conspecifics and where breeding raptors were less abundant. Parakeets always flushed when raptors approached their nests when breeding alone, but stayed at their nests when breeding in association with Storks. Moreover, when Storks abandoned a nest, parakeets abandoned it in the following year, suggesting that Storks actually confer protection against predators. Conclusions Our results show how a protective-nesting association between invasive and native species can counteract biotic resistance to allow the spread of an invasive species across non-urban habitats, where they may become crop pests. Monk parakeet populations are now growing exponentially in several cities in several Mediterranean countries, where they coexist with white Storks. Therefore, management plans should consider this risk of spread into rural areas and favour native predators as potential biological controllers.
Guillermo Blanco - One of the best experts on this subject based on the ideXlab platform.
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A protective nesting association with native species counteracts biotic resistance for the spread of an invasive parakeet from urban into rural habitats
Frontiers in Zoology, 2020Co-Authors: Dailos Hernández-brito, Guillermo Blanco, José Luis Tella, Martina CarreteAbstract:Background Non-native species are often introduced in cities, where they take advantage of microclimatic conditions, resources provided by humans, and competitor/predator release to establish and proliferate. However, native communities in the surrounding rural or natural areas usually halt their spread through biotic resistance, mainly via top-down regulative processes (predation pressure). Here, we show an unusual commensal interaction between exotic and native bird species that favours the spread of the former from urban to rural habitats. Results We show how Monk parakeets Myiopsitta monachus , an invasive species often introduced in cities worldwide, associated for breeding with a much larger, native species (the white Stork Ciconia ciconia ) to reduce predation risk in central Spain, thus allowing their colonization of rural areas. Parakeets selected Stork nests close to conspecifics and where breeding raptors were less abundant. Parakeets always flushed when raptors approached their nests when breeding alone, but stayed at their nests when breeding in association with Storks. Moreover, when Storks abandoned a nest, parakeets abandoned it in the following year, suggesting that Storks actually confer protection against predators. Conclusions Our results show how a protective-nesting association between invasive and native species can counteract biotic resistance to allow the spread of an invasive species across non-urban habitats, where they may become crop pests. Monk parakeet populations are now growing exponentially in several cities in several Mediterranean countries, where they coexist with white Storks. Therefore, management plans should consider this risk of spread into rural areas and favour native predators as potential biological controllers.
