Structural heterogeneity of linear habitats positively affects Barred WarblerSylvia nisoria, Common WhitethroatSylvia communisand Lesser WhitethroatSylvia currucain farmland of Western Poland

Szymański, Paweł; Antczak, Marcin

doi:10.1080/00063657.2013.840555

Cited by 12 publications

(12 citation statements)

References 30 publications

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“…Po letu 2003, ko je bila opravljena večina popisov za NOAGS, sta bili na Goričkem povsem na novo zabeleženi dve vrsti, ki kažeta na povečano zaraščanje z grmovjem in drevjem, in sicer pisana penica ter drevesna cipa. Pisana penica gnezdi v gostem grmovju, najraje trnastem (Maumary et al 2007, Polak 2012, Szymański & Antczak 2013. Preferira široke mejice, v ozkih mejicah pa je strukturna raznolikost grmovja tista, ki lahko nadomesti majhno širino (Szymański & Antczak 2013).…”

Section: Opuščanje Rabeunclassified

Population trends of Goričko agricultural landscape birds

Denac¹,

Kmecl²,

Domanjko³

et al. 2017

Acrocephalus

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Due to numerous bird surveys in the past 20 years, the avifauna of Goričko is relatively well known. For some species, the very first national ecological researches were conducted in this area. The article summarizes all bird surveys so far. It presents population trends of farmland species which is one of the most threatened bird groups in Europe. Most of the qualifying species of this habitat that are protected within the Natura 2000 network have suffered a decline at Goričko, specifically QuailCoturnix coturnix, Scops OwlOtus scops, HoopoeUpupa epops, WoodlarkLullula arboreaand White StorkCiconia ciconia. The number of breeding pairs of the latter has not changed, but its fecundity has decreased. Furthermore, populations of other farmland bird species have decreased, for example SkylarkAlauda arvensis, StonechatSaxicola rubicola, SerinSerinus serinusand Common LinnetLinaria cannabina, as well as butterfly populations and tracts of grassland habitat types. National agricultural and nature conservation policies are evidently inefficient in protecting the biodiversity of Goričko. The most probable cause for bird population decline is agricultural intensification, which manifests itself at Goričko as disappearance and intensification of meadows, land consolidation, degradation of traditional orchards and use of pesticides. As a result of land consolidation hedges, uncultivated strips between fields, individual trees and bushes and minority habitat types are disappearing, whereas the surface of arable fields is increasing. Nature conservation measures performed by the Public Institute Goričko Nature Park with the support of DOPPS – BirdLife Slovenia volunteers seem to be efficient, but are spatially and temporally constrained. For this reason, they cannot serve as a substitute for insufficient systemic financing which could be improved by substantive and financial reform of the agri-environmental scheme. Currently, a negligible percentage (1% in 2016) of Goričko is covered by agrienvironmental scheme measures with positive influence on qualifying species and habitat types. As a consequence, only an insignificant share of subsidies from the Rural Development Plan is used for nature protection at Goričko. If the system of agricultural subsidies remains unaltered, no improvement of the conditions for bird conservation at Goričko can be expected.

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Section: Opuščanje Rabeunclassified

Population trends of Goričko agricultural landscape birds

Denac¹,

Kmecl²,

Domanjko³

et al. 2017

Acrocephalus

View full text Add to dashboard Cite

show abstract

“…Številne vrste namreč za prehranjevanje ali gnezdenje potrebujejo določeno površino grmovja ali visokih zeli. Takšni so na primer veliki skovik (Sierro & Arlettaz 2013, Denac & Kmecl 2014, rjavi srakoper (Brambilla et al 2007), repnik (Eybert et al 1995), prosnik (Greig-Smith 1983, Revaz et al 2008, pisana penica (Polak 2012, Szymański & Antczak 2013 in rjava penica (Stoate & Szczur 2001. V začetnih in srednjih fazah zaraščanja površin je abundanca ravnokrilcev, ki so pomembna hrana mnogih vrst ptic (Lepley et al 2004, Marchesi & Sergio 2005, Menz 2008, praviloma največja, vendar pa z napredovanjem zaraščanja upade (Schirmel et al 2011, Fartmann et al 2012.…”

Section: Opuščanje Rabeunclassified

“…Po letu 2003, ko je bila opravljena večina popisov za NOAGS, sta bili na Goričkem povsem na novo zabeleženi dve vrsti, ki kažeta na povečano zaraščanje z grmovjem in drevjem, in sicer pisana penica ter drevesna cipa. Pisana penica gnezdi v gostem grmovju, najraje trnastem , Polak 2012, Szymański & Antczak 2013. Preferira široke mejice, v ozkih mejicah pa je strukturna raznolikost grmovja tista, ki lahko nadomesti majhno širino (Szymański & Antczak 2013).…”

Section: Opuščanje Rabeunclassified

“…Pisana penica gnezdi v gostem grmovju, najraje trnastem , Polak 2012, Szymański & Antczak 2013. Preferira široke mejice, v ozkih mejicah pa je strukturna raznolikost grmovja tista, ki lahko nadomesti majhno širino (Szymański & Antczak 2013). Poznim sukcesijskim stadijem z veliko visokega grmovja se izogiba, vendar pa posamezna višja drevesa med grmovjem uporablja kot pevska mesta (Polak 2012, Szymański & Antczak 2013.…”

Section: Opuščanje Rabeunclassified

“…Preferira široke mejice, v ozkih mejicah pa je strukturna raznolikost grmovja tista, ki lahko nadomesti majhno širino (Szymański & Antczak 2013). Poznim sukcesijskim stadijem z veliko visokega grmovja se izogiba, vendar pa posamezna višja drevesa med grmovjem uporablja kot pevska mesta (Polak 2012, Szymański & Antczak 2013. Drevesna cipa je vrsta odprte krajine, v kateri pa potrebuje gozdne otoke, mejice, grmišča in travnike v začetnih sukcesijskih fazah, ki jih uporablja kot pevska in gnezditvena mesta (Loske & Shepherd 1997, Burton 2007, Hübner 2009.…”

Section: Opuščanje Rabeunclassified

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Population dynamics of five riverbed breeding bird species on the lower Drava River, NE Slovenia

Božič¹,

Denac²

2017

Acrocephalus

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In 2006–2017, annual censuses of breeding bird species regarded as indicators of natural rivers were carried out on the 38.9 km long lowland stretch of the Drava riverbed between Maribor and Zavrč with altered flow regime due to the operating hydropower plants. Gravel bar habitats were surveyed in four years of the study period by combining orthophoto analysis and analysis of field photographs. Effects of gravel bar management were evaluated based at 20 locations. The Little Ringed PloverCharadrius dubiusoccurred on 39.8% of the gravel bars, but most were occupied only in a few years and held just one breeding pair. Low numbers between 2009 and 2012 (< 30 pairs) were followed by a steep population increase from 2014 onwards to a maximum of 66–73 pairs (1.7–1.9 p/km). Such population dynamics was attributed to the lack of large discharges (>500 m3/s) and consequent overgrowing of riverbed in the first part of the study period, while the increase in the second part was due to the creation of extensive shingle areas (from 20,6 ha in 2009/10 to 37,8 ha in 2014) by the extreme flood in early November 2012, subsequent regular occurrence of large discharges outside the breeding seasons and large-scale removals of woody vegetation. Breeding population of Common SandpiperActitis hypoleucosremained at a rather similar low level (<20 p) during most of the period studied after an initial decline, and did not reflect changes in the overall surface area of riverbed habitats. Contrary to the general situation, the number of breeding pairs on gravel bars subjected to management increased several-fold. Maximum number of pairs on these bars was reached up to four years after the initiation of management measures, as only then the optimal mosaic of early successional stages interspersed with shingle areas developed at main sites. The species was widespread only on lower part of the Drava. KingfisherAlcedo atthiswas fairly widely distributed along the riverbed, but occurred in rather low densities throughout (c. one pair on 2–3 km of the studied riverbed on average), probably as a result of limited bank erosion and consequent overgrowing/lack of suitable nest sites. The population was estimated as stable with effects of harsh winter conditions on breeding numbers in some years. The majority of nest holes were excavated in eroded river banks along the main river channel (77.8%), followed by similar sites located in mouth areas of small tributaries of the Drava (14.8%). Regular breeding of Sand MartinRiparia ripariasince 2012 (up to 259, mostly at only one location annually) was almost exclusively the result of the annual artificial nest site preparation programme. Fairly large gravel bar-breeding population of White WagtailMotacilla alba, monitored since 2013 and predominantly ground nesting in sparsely vegetated areas, seems unusual considering the prevalent breeding habits of the species at the European scale. Conservation implications and guidelines for future management efforts are discussed.

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Comparative breeding ecology, nest survival, and agonistic behaviour between the Barred Warbler and the Red-backed Shrike

Polak

2016

J Ornithol

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The majority of studies have demonstrated that the Barred Warbler Sylvia nisoria (BW) and the Redbacked Shrike Lanius collurio (RBS), where they occur sympatrically in central Europe, inhabit similar niches and are not averse to nesting in each other's vicinity. The present work compares the reproductive parameters, nest survival, and behavioural interactions between these two ecologically similar species. The study was carried out in eastern Poland in two types of habitat: a river valley and farmland. Inter-habitat analysis showed both species to have similar reproductive parameters, although nest survival of the RBS was greater in farmland than in the river valley. Interspecific comparison revealed that the BW built smaller nests, laid fewer and smaller eggs than the RBS, but the production of offspring was similar in both species. In comparison to the other populations from Europe, both the BW and RBS in eastern Poland experienced good breeding parameters, and this is likely to be related to the region's extensive agriculture management and abundant food resources. The main factor reducing breeding success in both species was the plundering of their broods by raptors. Analysis using the MARK program indicated that habitat parameters significantly affected brood survival in the RBS to a relatively constant extent throughout the season. While habitat factors were less decisive in BWs, the fate of this species' broods was strongly dependent on the phase of the reproductive cycle, and its nests were least likely to survive in the middle of the breeding season. The level of aggression between the BW and RBS was low, as demonstrated by experiments with stuffed models; this was a factor in favour of their nesting in close proximity to one another. Keywords

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Structural heterogeneity of linear habitats positively affects Barred WarblerSylvia nisoria, Common WhitethroatSylvia communisand Lesser WhitethroatSylvia currucain farmland of Western Poland

Cited by 12 publications

References 30 publications

Population trends of Goričko agricultural landscape birds

Population trends of Goričko agricultural landscape birds

Population dynamics of five riverbed breeding bird species on the lower Drava River, NE Slovenia

Comparative breeding ecology, nest survival, and agonistic behaviour between the Barred Warbler and the Red-backed Shrike

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