Ziemowit Kosiński - Profile on Academia.edu (original) (raw)
Papers by Ziemowit Kosiński
Acta Ornithologica, Jul 1, 2006
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Liczebnosc i sukces legowy bociana bialego Ciconia ciconia na ziemi krotoszynskiej w latach 1993-1997
Chrońmy Przyrodę Ojczystą, 1998
Polish Journal of Ecology, 2007
Abundance, distribution and nest-site characteristics of woodpecker species (family Picidae), i.e... more Abundance, distribution and nest-site characteristics of woodpecker species (family Picidae), i.e., Great Spotted Woodpecker (Dendrocopos major L.), Middle Spotted Woodpecker (D. medius L.), Lesser Spotted Woodpecker (D. minor L.), Black Woodpecker (Dryocopus martius L.), Grey-faced Woodpecker (Picus canus Gmel.) and Wryneck (Jynx torquilla L.), coexisting in managed forest are described. All species preferred old deciduous forest stands (≥81 years old) as nest-sites, however, they differed in most aspects of nest site selection. Great-and Middle Spotted Woodpeckers excavated nest-holes most commonly in oaks (78 and 86% of nests, respectively), but Black-and Grey-faced Woodpeckers in beeches (71 and 100% of nests). However, placement of nest-holes within the same tree species differed among woodpecker species. Great Spotted-and Grey-faced Woodpeckers nested three meters lower (9 m) compared to Middle Spotted and Black Woodpeckers (12 m). Lesser Spotted-Woodpeckers excavated breeding holes relatively the highest in respect to tree height. With the exception of Lesser Spotted Woodpeckers, all specie used live trees as nest sites. Weaker excavators such as Middle Spotted-and Lesser Spotted Woodpeckers, nested more frequently in limbs and branches (31 and 25% of nests, respectively) compared to strong excavators, i.e., Great Spotted-, Black-and Greyfaced Woodpeckers (<8% of nests in limbs or branches). Weaker excavators more frequently selected dead tree fragments compared to strong excavators.
Ocena liczebnosci dzieciola sredniego Dendrocopos medius - porownanie metody kartograficznej z uzyciem stymulacji magnetofonowej z metoda wyszukiwania gniazd
Notatki Ornitologiczne, 2003
Ugrupowanie ptakow legowych Dabrowy Krotoszynskiej na tle gradow Polski
Notatki Ornitologiczne, 1993
Acta Ornithologica, Dec 1, 2014
Leniowski K., Węgrzyn E., Kosiński Z. 2014. Mates exhibit similar brightness of carotenoid red ca... more Leniowski K., Węgrzyn E., Kosiński Z. 2014. Mates exhibit similar brightness of carotenoid red caps in Middle Spotted Woodpeckers Dendrocopos medius. Acta Ornithol. 49: 267-272.
Biodiversity and Conservation, Aug 28, 2017
Standing dead trees may be a limited resource for woodpeckers in managed forests, especially for ... more Standing dead trees may be a limited resource for woodpeckers in managed forests, especially for species that rely on dead wood for their nest or roost cavity, and as foraging sites. Effective conservation strategies for woodpeckers require a detailed knowledge of species' responses to dead wood availability. To investigate the importance of standing dead wood (snags) for the abundance and nest-site use of the great spotted woodpecker Dendrocopos major and middle spotted woodpecker Leiopicus medius in mature riverine forests, we compared the responses of birds between two periods-before mass mortality, and during a pulse in standing dead trees. The density of standing dead trees available for cavity excavation by the great spotted woodpecker and the middle spotted woodpecker increased significantly during the study period: 37-fold and 4-fold, respectively. Temporal trends in the abundance of both woodpecker species from 2000 to 2015 were not significant. Great spotted woodpeckers were significantly more likely to use dead trees and places with wounds in species other than oak and ash during the outbreak period than in the pre-outbreak period. Middle spotted woodpeckers were significantly less likely to excavate cavities in tree species other than oak and ash in the outbreak period, but dead trees were more likely selected. An interspecific comparison suggests that the probability of a nest-hole having been excavated by a middle spotted woodpecker increased with a nest-hole sited in ash, in a dead tree, in a limb/branch, and decreased with Communicated by Khoon Meng Wong.
Acta Ornithologica, Dec 1, 2001
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Journal of ornithology, Mar 31, 2020
Analysis of ecological time series allows to assess the relative contribution of density-dependen... more Analysis of ecological time series allows to assess the relative contribution of density-dependent and density-independent factors influencing the regulation of the population of a species. In this study, we investigated whether the annual fluctuation in the population of Middle Spotted Woodpeckers Dendrocoptes medius can be attributed to the direct or delayed densitydependent regulation or to the density-independent factors such as weather conditions during the preceding winter and previous breeding season and/or disturbance in the habitat associated with sanitary felling and salvage logging of trees. This study was conducted in the Czeszewo Forest Reserve, which protects the remnants of semi-natural flood-plain forest, and in the Łówkowiec Forest, which is a managed oak-dominated stand, during 19 seasons (2001-2019). Time series diagnostic revealed that the growth rate of population of Middle Spotted Woodpecker in protected semi-natural riverine forest and in managed oak forest was determined by first-order negative feedback, suggesting an important role of direct density-dependent mortality in the regulation of an equilibrium in population size. The effect of density-dependent process varied between study sites, being lower in riverine forest, where population size has increased distinctly in recent years. In both study areas, we detected strong positive effects of wind chill temperature during the preceding winter on population growth rates. We did not find evidence for the assumption that the increase in population growth rate is affected by weather conditions in the previous breeding season and by the disturbance in the habitat associated with sanitary felling and salvage logging of trees. Our results suggest that Middle Spotted Woodpeckers can benefit from global climate warming by an enhanced rate of winter survival or an increase in the accessibility of food, e.g., insects and other arthropods. The lack of time-lag significant correlations between population fluctuations suggests local habitat conditions, e.g., forest management, can modify inter-annual variability in time series of the Middle Spotted Woodpecker.
Journal of ornithology, Jul 23, 2018
Nesting in old cavities may be adaptive for birds as it may offer an advantage of earlier laying ... more Nesting in old cavities may be adaptive for birds as it may offer an advantage of earlier laying and higher fitness through more recruiting offspring. Black Woodpeckers frequently use old cavities, which gives the opportunity to test how this behavior affects the timing and the success of reproduction. In this paper, we have tested a prediction that excavating a new cavity causes a delay in breeding, and that it is linked to lower productivity. We found that in the Wielkopolski National Park (western Poland) Black Woodpeckers nested exclusively in European beeches, mainly in living trees, and most frequently in their old cavities. The median relative egg-laying date in old cavities was 5.5 days earlier than in new cavities. We did not find a difference in clutch size between old and new cavities due to its low variation in the population. The proportion of offspring surviving to the end of the nestling period was 0.812 in old cavities and 0.632 in new cavities, although this did not differ significantly. However, survivorship dropped rapidly in the hatching period, especially in new cavities. In Black Woodpecker, the number of fledglings that succeeded was best explained by a model including the age of the cavity and the relative laying date. The estimated parameters of the best ranked model revealed that the number of fledglings is affected by the age of the cavity as it was higher for old cavities than for new cavities. This study shows that nest reuse is adaptive for primary excavators as it offers time and energy savings needed for cavity excavation, and increases productivity, compared to those pairs of birds that are forced to excavate a new cavity. These data are consistent with the hypothesis that cavity excavation is energetically expensive and support the prediction of tradeoffs between nest building and different components of reproduction. Responsible forest management should consider the need to protect living beeches with old cavities, which are frequently used by Black Woodpeckers.
Factors affecting the density of the middle spotted woodpecker Dendrocopos medius: a macrohabitat approach
Journal of Ornithology, May 25, 2005
Dzięcioł czarny Dryocopus martius i buk Fagus sylvatica gatunkami zwornikowymi dla siniaka Columba oenas w zachodniej Polsce
Ornis Polonica, 2010
Effects of lake morphometry, emergent vegetation and shore habitat on breeding bird communities
Acta Ornithologica, 1999
Acta Ornithologica, Dec 1, 2011
Nest-site preferences of the Stock Dove Columba oenas population breeding in holes excavated by t... more Nest-site preferences of the Stock Dove Columba oenas population breeding in holes excavated by the Black Woodpecker Drycopus martius in three sites in western Poland was examined. During the surveys, 176 different trees with 326 holes of Black Woodpeckers were found and investigated. Habitat data at nest locations were characterized on a fine microhabitat scale -hole tree. We used individual selection indices and canonical variate analysis to describe nest-site preferences. Both analyses provided similar results. Nest-site selection of the Stock Dove was consistently associated with live beeches Fagus sylvatica with more than one hole. These features were clearly associated with diameter at breast height. Moreover, holes situated higher in tree trunk were preferred. Dead trees, mostly Scots Pines Pinus sylvestris, were avoided by the Stock Dove. We suggest that positive selection for smooth-barked beech trees with a number of holes, as well as holes situated higher might reduce the risk of predation by arboreal predators, e.g. the Pine Marten Martes martes. The positive selection for live trees, and clear avoidance of the dead ones, may reduce the cost of incubation and thermoregulation. Moreover, the live beech trees have long life expectancy compared to other tree species. Our results provide evidence that large alive beech trees with the number of holes excavated by Black Woodpeckers are necessary for maintaining breeding population of the Stock Dove.
Zgrupowanie ptakow legowych Jeziora Lednickiego w latach 1994-1995
Ringing and Migration, 2004
This paper examines the effect of sex and ring colour on the frequency of removal of plastic colo... more This paper examines the effect of sex and ring colour on the frequency of removal of plastic colour rings by Greenfinches Carduelis chloris. Of 55 recaptures of 42 individuals, 22 (40%) had lost at least one of its colour rings. Females showed a tendency to remove colour rings more frequently than males. For both sexes, there was a similar tendency to remove more dark than light-coloured rings. While it is not possible to identify a specific reason why the birds remove their colour rings, it is possible that discomfort on the nest may play a role in ring removal by females and, more speculatively, it is possible that males might remove colour rings to manipulate their sexual attractiveness to females. Wrap-around rings might provide a solution to the problem of colour-ringing species with powerful beaks.
Comparative reproductive biology of Middle Spotted WoodpeckersDendrocopos mediusand Great Spotted WoodpeckersD. majorin a riverine forest
Bird Study, Nov 1, 2006
ABSTRACT Aims To examine the relevant reproductive features of the two co-occurring congeneric wo... more ABSTRACT Aims To examine the relevant reproductive features of the two co-occurring congeneric woodpecker species, to analyse the effect of timing of breeding, clutch size and weather conditions on survival time of nestlings, and to discuss life-history traits in relation to potential food limitation and mortality.
Ocena liczebności dzięcioła średniego Dendrocopos medius w ostoi ptaków "Dąbrowy Krotoszyńskie
The use of canonical correlation analysis for ornithological evaluation of lakes in W Poland
The aim of the study was to evaluate the importance of lakes in the Wielkopolska region (western ... more The aim of the study was to evaluate the importance of lakes in the Wielkopolska region (western Poland) to migratory waterbirds on the basis of lake morphometry. Single bird surveys were conducted on 204 lakes in November between 1973n1975 and 1984n1986. The observed species distribution deviated from the model of random placement. The relationship between habitat variables and iavian indicesi (number of species, abundance of single species and total abundance of birds) were analysed by canonical correlation. A high value of the canonical correlation coefficient between bird abundance and morphometric measures was recorded. We conclude that canonical correlation can be used to evaluate the attractiveness of lakes for birds. The advantages of this method are: (1)†consideration of correlations between the data sets (morphometric measures and avian indices) and within these sets, (2)†objectiveness and (3)†possibility of evaluation of the lake in the case of lack of bird surveys. These data will facilitate the development of a regional monitoring programme, as well as provide baseline data for identifying the most valuable lakes.
Factors affecting the occurrence of middle spotted woodpeckers revealed by forest inventory data
Baltic Forestry, 2013
ABSTRACT Kosiński, Z. 2006: Factors affecting the occurrence of middle spotted and great spotted ... more ABSTRACT Kosiński, Z. 2006: Factors affecting the occurrence of middle spotted and great spotted woodpeck-ers in deciduous forests — a case study from Poland. — Ann. Zool. Fennici 43: 198–210. Based on published data on 117 deciduous forest sites studied in Poland, relationships between habitat factors (size of study plot, type and age of forest stands) and breed-ing of great spotted and middle spotted woodpeckers were examined. As compared with middle spotted woodpeckers, great spotted woodpeckers occupied twice as large a number of studied plots (97 vs. 41) and were characterized by lower area demands. Great spotted woodpeckers avoided young forest stands and residual alluvial forests, preferring oak-dominated forests. Middle spotted woodpeckers selected the oldest, oak-dominated forests. Logistic regression revealed that the presence or absence of great spotted woodpeckers could be predicted from the age of forest stands, and the occurrence of middle spotted woodpeckers was positively correlated with the plot size and type of forest. My results stress the importance of old, sufficiently large (> 15 ha) oak dominated forests conducive to the presence of middle spotted woodpeckers.
Acta Ornithologica, Jul 1, 2006
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Liczebnosc i sukces legowy bociana bialego Ciconia ciconia na ziemi krotoszynskiej w latach 1993-1997
Chrońmy Przyrodę Ojczystą, 1998
Polish Journal of Ecology, 2007
Abundance, distribution and nest-site characteristics of woodpecker species (family Picidae), i.e... more Abundance, distribution and nest-site characteristics of woodpecker species (family Picidae), i.e., Great Spotted Woodpecker (Dendrocopos major L.), Middle Spotted Woodpecker (D. medius L.), Lesser Spotted Woodpecker (D. minor L.), Black Woodpecker (Dryocopus martius L.), Grey-faced Woodpecker (Picus canus Gmel.) and Wryneck (Jynx torquilla L.), coexisting in managed forest are described. All species preferred old deciduous forest stands (≥81 years old) as nest-sites, however, they differed in most aspects of nest site selection. Great-and Middle Spotted Woodpeckers excavated nest-holes most commonly in oaks (78 and 86% of nests, respectively), but Black-and Grey-faced Woodpeckers in beeches (71 and 100% of nests). However, placement of nest-holes within the same tree species differed among woodpecker species. Great Spotted-and Grey-faced Woodpeckers nested three meters lower (9 m) compared to Middle Spotted and Black Woodpeckers (12 m). Lesser Spotted-Woodpeckers excavated breeding holes relatively the highest in respect to tree height. With the exception of Lesser Spotted Woodpeckers, all specie used live trees as nest sites. Weaker excavators such as Middle Spotted-and Lesser Spotted Woodpeckers, nested more frequently in limbs and branches (31 and 25% of nests, respectively) compared to strong excavators, i.e., Great Spotted-, Black-and Greyfaced Woodpeckers (<8% of nests in limbs or branches). Weaker excavators more frequently selected dead tree fragments compared to strong excavators.
Ocena liczebnosci dzieciola sredniego Dendrocopos medius - porownanie metody kartograficznej z uzyciem stymulacji magnetofonowej z metoda wyszukiwania gniazd
Notatki Ornitologiczne, 2003
Ugrupowanie ptakow legowych Dabrowy Krotoszynskiej na tle gradow Polski
Notatki Ornitologiczne, 1993
Acta Ornithologica, Dec 1, 2014
Leniowski K., Węgrzyn E., Kosiński Z. 2014. Mates exhibit similar brightness of carotenoid red ca... more Leniowski K., Węgrzyn E., Kosiński Z. 2014. Mates exhibit similar brightness of carotenoid red caps in Middle Spotted Woodpeckers Dendrocopos medius. Acta Ornithol. 49: 267-272.
Biodiversity and Conservation, Aug 28, 2017
Standing dead trees may be a limited resource for woodpeckers in managed forests, especially for ... more Standing dead trees may be a limited resource for woodpeckers in managed forests, especially for species that rely on dead wood for their nest or roost cavity, and as foraging sites. Effective conservation strategies for woodpeckers require a detailed knowledge of species' responses to dead wood availability. To investigate the importance of standing dead wood (snags) for the abundance and nest-site use of the great spotted woodpecker Dendrocopos major and middle spotted woodpecker Leiopicus medius in mature riverine forests, we compared the responses of birds between two periods-before mass mortality, and during a pulse in standing dead trees. The density of standing dead trees available for cavity excavation by the great spotted woodpecker and the middle spotted woodpecker increased significantly during the study period: 37-fold and 4-fold, respectively. Temporal trends in the abundance of both woodpecker species from 2000 to 2015 were not significant. Great spotted woodpeckers were significantly more likely to use dead trees and places with wounds in species other than oak and ash during the outbreak period than in the pre-outbreak period. Middle spotted woodpeckers were significantly less likely to excavate cavities in tree species other than oak and ash in the outbreak period, but dead trees were more likely selected. An interspecific comparison suggests that the probability of a nest-hole having been excavated by a middle spotted woodpecker increased with a nest-hole sited in ash, in a dead tree, in a limb/branch, and decreased with Communicated by Khoon Meng Wong.
Acta Ornithologica, Dec 1, 2001
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Journal of ornithology, Mar 31, 2020
Analysis of ecological time series allows to assess the relative contribution of density-dependen... more Analysis of ecological time series allows to assess the relative contribution of density-dependent and density-independent factors influencing the regulation of the population of a species. In this study, we investigated whether the annual fluctuation in the population of Middle Spotted Woodpeckers Dendrocoptes medius can be attributed to the direct or delayed densitydependent regulation or to the density-independent factors such as weather conditions during the preceding winter and previous breeding season and/or disturbance in the habitat associated with sanitary felling and salvage logging of trees. This study was conducted in the Czeszewo Forest Reserve, which protects the remnants of semi-natural flood-plain forest, and in the Łówkowiec Forest, which is a managed oak-dominated stand, during 19 seasons (2001-2019). Time series diagnostic revealed that the growth rate of population of Middle Spotted Woodpecker in protected semi-natural riverine forest and in managed oak forest was determined by first-order negative feedback, suggesting an important role of direct density-dependent mortality in the regulation of an equilibrium in population size. The effect of density-dependent process varied between study sites, being lower in riverine forest, where population size has increased distinctly in recent years. In both study areas, we detected strong positive effects of wind chill temperature during the preceding winter on population growth rates. We did not find evidence for the assumption that the increase in population growth rate is affected by weather conditions in the previous breeding season and by the disturbance in the habitat associated with sanitary felling and salvage logging of trees. Our results suggest that Middle Spotted Woodpeckers can benefit from global climate warming by an enhanced rate of winter survival or an increase in the accessibility of food, e.g., insects and other arthropods. The lack of time-lag significant correlations between population fluctuations suggests local habitat conditions, e.g., forest management, can modify inter-annual variability in time series of the Middle Spotted Woodpecker.
Journal of ornithology, Jul 23, 2018
Nesting in old cavities may be adaptive for birds as it may offer an advantage of earlier laying ... more Nesting in old cavities may be adaptive for birds as it may offer an advantage of earlier laying and higher fitness through more recruiting offspring. Black Woodpeckers frequently use old cavities, which gives the opportunity to test how this behavior affects the timing and the success of reproduction. In this paper, we have tested a prediction that excavating a new cavity causes a delay in breeding, and that it is linked to lower productivity. We found that in the Wielkopolski National Park (western Poland) Black Woodpeckers nested exclusively in European beeches, mainly in living trees, and most frequently in their old cavities. The median relative egg-laying date in old cavities was 5.5 days earlier than in new cavities. We did not find a difference in clutch size between old and new cavities due to its low variation in the population. The proportion of offspring surviving to the end of the nestling period was 0.812 in old cavities and 0.632 in new cavities, although this did not differ significantly. However, survivorship dropped rapidly in the hatching period, especially in new cavities. In Black Woodpecker, the number of fledglings that succeeded was best explained by a model including the age of the cavity and the relative laying date. The estimated parameters of the best ranked model revealed that the number of fledglings is affected by the age of the cavity as it was higher for old cavities than for new cavities. This study shows that nest reuse is adaptive for primary excavators as it offers time and energy savings needed for cavity excavation, and increases productivity, compared to those pairs of birds that are forced to excavate a new cavity. These data are consistent with the hypothesis that cavity excavation is energetically expensive and support the prediction of tradeoffs between nest building and different components of reproduction. Responsible forest management should consider the need to protect living beeches with old cavities, which are frequently used by Black Woodpeckers.
Factors affecting the density of the middle spotted woodpecker Dendrocopos medius: a macrohabitat approach
Journal of Ornithology, May 25, 2005
Dzięcioł czarny Dryocopus martius i buk Fagus sylvatica gatunkami zwornikowymi dla siniaka Columba oenas w zachodniej Polsce
Ornis Polonica, 2010
Effects of lake morphometry, emergent vegetation and shore habitat on breeding bird communities
Acta Ornithologica, 1999
Acta Ornithologica, Dec 1, 2011
Nest-site preferences of the Stock Dove Columba oenas population breeding in holes excavated by t... more Nest-site preferences of the Stock Dove Columba oenas population breeding in holes excavated by the Black Woodpecker Drycopus martius in three sites in western Poland was examined. During the surveys, 176 different trees with 326 holes of Black Woodpeckers were found and investigated. Habitat data at nest locations were characterized on a fine microhabitat scale -hole tree. We used individual selection indices and canonical variate analysis to describe nest-site preferences. Both analyses provided similar results. Nest-site selection of the Stock Dove was consistently associated with live beeches Fagus sylvatica with more than one hole. These features were clearly associated with diameter at breast height. Moreover, holes situated higher in tree trunk were preferred. Dead trees, mostly Scots Pines Pinus sylvestris, were avoided by the Stock Dove. We suggest that positive selection for smooth-barked beech trees with a number of holes, as well as holes situated higher might reduce the risk of predation by arboreal predators, e.g. the Pine Marten Martes martes. The positive selection for live trees, and clear avoidance of the dead ones, may reduce the cost of incubation and thermoregulation. Moreover, the live beech trees have long life expectancy compared to other tree species. Our results provide evidence that large alive beech trees with the number of holes excavated by Black Woodpeckers are necessary for maintaining breeding population of the Stock Dove.
Zgrupowanie ptakow legowych Jeziora Lednickiego w latach 1994-1995
Ringing and Migration, 2004
This paper examines the effect of sex and ring colour on the frequency of removal of plastic colo... more This paper examines the effect of sex and ring colour on the frequency of removal of plastic colour rings by Greenfinches Carduelis chloris. Of 55 recaptures of 42 individuals, 22 (40%) had lost at least one of its colour rings. Females showed a tendency to remove colour rings more frequently than males. For both sexes, there was a similar tendency to remove more dark than light-coloured rings. While it is not possible to identify a specific reason why the birds remove their colour rings, it is possible that discomfort on the nest may play a role in ring removal by females and, more speculatively, it is possible that males might remove colour rings to manipulate their sexual attractiveness to females. Wrap-around rings might provide a solution to the problem of colour-ringing species with powerful beaks.
Comparative reproductive biology of Middle Spotted WoodpeckersDendrocopos mediusand Great Spotted WoodpeckersD. majorin a riverine forest
Bird Study, Nov 1, 2006
ABSTRACT Aims To examine the relevant reproductive features of the two co-occurring congeneric wo... more ABSTRACT Aims To examine the relevant reproductive features of the two co-occurring congeneric woodpecker species, to analyse the effect of timing of breeding, clutch size and weather conditions on survival time of nestlings, and to discuss life-history traits in relation to potential food limitation and mortality.
Ocena liczebności dzięcioła średniego Dendrocopos medius w ostoi ptaków "Dąbrowy Krotoszyńskie
The use of canonical correlation analysis for ornithological evaluation of lakes in W Poland
The aim of the study was to evaluate the importance of lakes in the Wielkopolska region (western ... more The aim of the study was to evaluate the importance of lakes in the Wielkopolska region (western Poland) to migratory waterbirds on the basis of lake morphometry. Single bird surveys were conducted on 204 lakes in November between 1973n1975 and 1984n1986. The observed species distribution deviated from the model of random placement. The relationship between habitat variables and iavian indicesi (number of species, abundance of single species and total abundance of birds) were analysed by canonical correlation. A high value of the canonical correlation coefficient between bird abundance and morphometric measures was recorded. We conclude that canonical correlation can be used to evaluate the attractiveness of lakes for birds. The advantages of this method are: (1)†consideration of correlations between the data sets (morphometric measures and avian indices) and within these sets, (2)†objectiveness and (3)†possibility of evaluation of the lake in the case of lack of bird surveys. These data will facilitate the development of a regional monitoring programme, as well as provide baseline data for identifying the most valuable lakes.
Factors affecting the occurrence of middle spotted woodpeckers revealed by forest inventory data
Baltic Forestry, 2013
ABSTRACT Kosiński, Z. 2006: Factors affecting the occurrence of middle spotted and great spotted ... more ABSTRACT Kosiński, Z. 2006: Factors affecting the occurrence of middle spotted and great spotted woodpeck-ers in deciduous forests — a case study from Poland. — Ann. Zool. Fennici 43: 198–210. Based on published data on 117 deciduous forest sites studied in Poland, relationships between habitat factors (size of study plot, type and age of forest stands) and breed-ing of great spotted and middle spotted woodpeckers were examined. As compared with middle spotted woodpeckers, great spotted woodpeckers occupied twice as large a number of studied plots (97 vs. 41) and were characterized by lower area demands. Great spotted woodpeckers avoided young forest stands and residual alluvial forests, preferring oak-dominated forests. Middle spotted woodpeckers selected the oldest, oak-dominated forests. Logistic regression revealed that the presence or absence of great spotted woodpeckers could be predicted from the age of forest stands, and the occurrence of middle spotted woodpeckers was positively correlated with the plot size and type of forest. My results stress the importance of old, sufficiently large (> 15 ha) oak dominated forests conducive to the presence of middle spotted woodpeckers.