Ortolansparvens Emberiza hortulana förekomst och habitatval i Sverige

The Swedish population of the Ortolan Bunting Emberiza hortulana has decreased with about 80% since 1975. The breeding habitat has traditionally been linked to farmland, but Ortolan Buntings are also found on clear cuts. Combining data from the Swedish Bird Survey (1996–2006) with landscape data (Swedish CORINE), we investigated the relationship between occurrence of Ortolan Buntings and different land cover variables. At a landscape scale of 5×5 km2, occurrence was positively correlated to the proportion of open cast mines, farmland, young forest, inland marshes and clear cuts south of 61°N. North of 61°N, the present population stronghold (~90%), occurrence was positively correlated to the proportion of farmland, clear cuts, coniferous forest, young forest, mixed forest and inland marshes. At a local scale (within 400 m), abundance was highest where clear cut was the main habitat, but abundance was not higher on clear cuts close to than far away from farmland. We estimate the total population at 6300 (4000–8600) pairs with around 50–85% occurring on clear cuts.

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Ortolan Bunting Emberiza hortulana at Kvismaren, central Sweden – breeding studies and suggested management

Ornis Svecica ◽

10.34080/os.v21.19600 ◽

2011 ◽

Vol 21 (2–4) ◽

pp. 167-178

Author(s):

Jan Sondell ◽

Craig Brookes ◽

Magnus Persson

Keyword(s):

Bare Soil ◽

Management Plan ◽

Small Population ◽

Autumn Migration ◽

Northern Sweden ◽

Swedish Population ◽

Open Ground ◽

Emberiza Hortulana ◽

Ortolan Bunting ◽

Spring Sowing

The only remaining Ortolan Buntings in the province of Närke are about 15 singing males in the Kvismaren valley. We studied this small population intensively during May–June, 2011. We found that the birds depend on bare soil of two kinds: potato fields turning green only in early July and open ground underneath birch and elder vegetation in an old bog. Thus spring sowing may be a “trap” as fields that look optimal when the Ortolans arrive in early May will in a few weeks turn green and become less suitable for breeding. In 2011, 6 pairs likely raised young and this result seems normal. Possibly this very small population persists due to recruitment from the much larger population in northern Sweden, that passes through Kvismaren during spring and autumn migration. The central Swedish population is only about 100 pairs and will probably disappear if a management plan is not implemented rapidly. New potentially suitable areas must be identified, and optimal breeding conditions must be provided at sites where Ortolan Buntings still occur.

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Habitat selection of Ortolan Buntings Emberiza hortulana on forest clear-cuts in northern Sweden

Ornis Svecica ◽

10.34080/os.v26.22527 ◽

2016 ◽

Vol 26 (2) ◽

pp. 89-103

Author(s):

Julianna Anne Percival ◽

Svein Dale

Keyword(s):

Forest Management ◽

Habitat Selection ◽

Bare Soil ◽

Positive Influence ◽

Northern Sweden ◽

Clear Cut ◽

Management Policies ◽

Emberiza Hortulana ◽

Ortolan Bunting ◽

Selection Of

Ortolan Buntings Emberiza hortulana in Sweden used to occur mainly in farmland. Nowadays, a large proportion of the remaining population is found on forest clear-cuts in northern Sweden. Few studies have identified the types of clear-cuts that Ortolan Buntings prefer and whether these habitats are used for both breeding and foraging. We recorded presence and abundance of ortolan buntings on clear-cuts in Västerbotten County, northern Sweden. We sampled 123 clear-cuts (present N = 48, absent N = 75; total of 93–100 territories) and our results showed that clear-cut size, the number of remaining trees, bare soil percentage (≥10%) and narrow-leaved grass vegetation had a positive influence on ortolan bunting occupancy. The number of territories on clear-cuts was positively related to clear-cut size and number of remaining trees. Proximity to nearby farmland did not influence occupancy on clear-cuts. Behavioural observations indicated that the forest clear-cuts were used for both nesting and feeding. We discuss these results in relation to forest management policies and conservation of the ortolan bunting.

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Habitat selection of an endangered European farmland bird, the Ortolan Bunting Emberiza hortulana, in two contrasting landscapes: implications for management

Bird Conservation International ◽

10.1017/s0959270918000060 ◽

2018 ◽

Vol 29 (1) ◽

pp. 144-158 ◽

Cited By ~ 1

Author(s):

MARTIN ŠÁLEK ◽

VÍT ZEMAN ◽

RADOVAN VÁCLAV

Keyword(s):

Czech Republic ◽

Habitat Heterogeneity ◽

Bird Species ◽

Habitat Associations ◽

Woody Vegetation ◽

The Czech Republic ◽

Habitat Features ◽

Farmland Bird ◽

Emberiza Hortulana ◽

Ortolan Bunting

SummaryEffective conservation measures for any bird species across their distribution ranges require detailed knowledge of landscape-specific differences in habitat associations. The Ortolan Bunting Emberiza hortulana is a farmland bird species, which experienced massive population declines during the recent decades and has become a conservation priority in many European countries. Thus, identification of the key habitat features is an important prerequisite for the conservation of the species. Here we investigate habitat associations of the Ortolan Bunting for the remaining breeding population of the species in the Czech Republic. This population is remarkable by its distribution in two markedly different environments – farmland and post-mining landscapes. The main objectives of this study were to identify habitat features associated with Ortolan Bunting occurrence within the two contrasting landscapes and at two spatial scales. Our results reveal a high degree of habitat plasticity by Ortolan Buntings in the Czech Republic which was revealed by the landscape- and scale- specific habitat associations. Habitat heterogeneity, in terms of compositional and configurational diversity, and the cover of bare ground were the most important predictors of Ortolan Bunting occurrence in both landscape types. In farmland, the species occurrence was positively associated with shrub and woody vegetation, poppy fields and set-asides, and negatively associated with grasslands, gardens/orchards, seedlings and urban habitats. In the post-mining landscape, the cover of herb vegetation and greater slope steepness and terrain ruggedness were most important habitat features. Ortolan Buntings in the post-mining landscape appear to avoid patches with a higher cover of shrub and woody vegetation, forests, seedlings and urban areas. We propose that conservation measures for Ortolan Buntings should focus on enhancing farmland habitat heterogeneity, but also on regulating the rate of succession in disturbed environments, such as post-mining landscapes.

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Variation of conducting area in stems of European larch (Larix deciduas) growing in fresh mixed coniferous forest and fresh mixed forest sites

Journal of Forest Science ◽

10.17221/45/2009-jfs ◽

2010 ◽

Vol 56 (No. 1) ◽

pp. 18-27 ◽

Cited By ~ 3

Author(s):

M. Nawrot ◽

M. Jakubowski ◽

W. Pazdrowski ◽

K. Kaźmierczak ◽

M. Szymański

Keyword(s):

Coniferous Forest ◽

Mixed Forest ◽

Coefficient Of Determination ◽

Forest Site ◽

Age Classes ◽

Main Crop ◽

Forest Sites ◽

The Social ◽

Individual Trees ◽

Site Types

The paper presents an attempt to determine conducting area (CA), relative conducting area (CA.k–1) and mean ring conducting area (CAar) on discs cut at breast height from stems of larch trees growing in fresh mixed coniferous forest and fresh mixed forest sites, representing four age classes and the main crop according to Kraft’s classification. The value of CA increases with an improvement of the social class of tree position in the community, while no such dependences were found for the value of (CA.k–1). The parameter CAar, except for one case in age class IV in the fresh mixed coniferous forest site, increases with an improvement of the position a tree takes in the community and differentiates more markedly under the conditions of fresh mixed forest sites. Relative conducting area (CA.k–1) decreases markedly with an increase in the age of trees, which is confirmed by high values of the coefficient of determination. Moreover, the significance of differences between individual trees in the main crop according to Kraft and forest site types was tested in terms of the values of CAar. Calculated values may be used to describe the relationships between conducting area and the size of the assimilating organ more precisely than the total sapwood zone.

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Unravelling migration connectivity reveals unsustainable hunting of the declining ortolan bunting

Science Advances ◽

10.1126/sciadv.aau2642 ◽

2019 ◽

Vol 5 (5) ◽

pp. eaau2642 ◽

Cited By ~ 4

Author(s):

Frédéric Jiguet ◽

Alexandre Robert ◽

Romain Lorrillière ◽

Keith A. Hobson ◽

Kevin J. Kardynal ◽

...

Keyword(s):

Extinction Risk ◽

Scientific Evidence ◽

Population Viability ◽

The European Union ◽

Migration Strategy ◽

Illegal Hunting ◽

Emberiza Hortulana ◽

Ortolan Bunting ◽

The Impact ◽

Stable Populations

In France, illegal hunting of the endangered ortolan bunting Emberiza hortulana has been defended for the sake of tradition and gastronomy. Hunters argued that ortolan buntings trapped in southwest France originate from large and stable populations across the whole of Europe. Yet, the European Commission referred France to the Court of Justice of the European Union (EU) in December 2016 for infringements to legislation (IP/16/4213). To better assess the impact of hunting in France, we combined Pan-European data from archival light loggers, stable isotopes, and genetics to determine the migration strategy of the species across continents. Ortolan buntings migrating through France come from northern and western populations, which are small, fragmented and declining. Population viability modeling further revealed that harvesting in southwest France is far from sustainable and increases extinction risk. These results provide the sufficient scientific evidence for justifying the ban on ortolan harvesting in France.

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Patterns of Carbon Sequestration in a Young Forest Ecosystem after Clear-Cutting

Forests ◽

10.3390/f11020126 ◽

2020 ◽

Vol 11 (2) ◽

pp. 126 ◽

Cited By ~ 3

Author(s):

Sille Rebane ◽

Kalev Jõgiste ◽

Andres Kiviste ◽

John A. Stanturf ◽

Marek Metslaid

Keyword(s):

Forest Ecosystem ◽

Net Ecosystem Exchange ◽

Co2 Concentration ◽

Co2 Exchange ◽

Large Area ◽

Clear Cut ◽

Clear Cutting ◽

Young Stand ◽

Young Forest ◽

Measurement Period

A large area of Estonian hemiboreal forest is recovering from clear-cut harvesting and changing carbon (C) balance of the stands. However, there is a lack of information about C- source/sink relationships during recovery of such stands. The eddy covariance technique was used to estimate C-status through net ecosystem exchange (NEE) of CO2 in two stands of different development stages located in southeast Estonia in 2014. Measured summertime (June–September) mean CO2 concentration was 337.75 ppm with mean NEE −1.72 µmol m−2 s−1. June NEE was −4.60 µmol m−2 s−1; July, August, and September NEE was −1.17, −0.77, and −0.25 µmol m−2 s−1, respectively. The two stands had similar patterns of CO2 exchange; measurement period temperature drove NEE. Our results show that after clear-cutting a 6-year-old forest ecosystem was a light C-sink and 8-year-old young stand demonstrated a stronger C-sink status during the measurement period.

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The genetic structure of the European breeding populations of a declining farmland bird, the ortolan bunting (Emberiza hortulana), reveals conservation priorities

Conservation Genetics ◽

10.1007/s10592-018-1064-9 ◽

2018 ◽

Vol 19 (4) ◽

pp. 909-922 ◽

Cited By ~ 4

Author(s):

Caroline Moussy ◽

Raphaël Arlettaz ◽

José Luis Copete ◽

Svein Dale ◽

Valery Dombrovski ◽

...

Keyword(s):

Genetic Structure ◽

Conservation Priorities ◽

Breeding Populations ◽

Farmland Bird ◽

Emberiza Hortulana ◽

Ortolan Bunting

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What are the important landscape components for habitat selection of the ortolan bunting Emberiza hortulana in northern limit of range?

European Journal of Ecology ◽

10.1515/eje-2015-0003 ◽

2015 ◽

Vol 1 (1) ◽

pp. 13-25 ◽

Cited By ~ 3

Author(s):

Jaanus Elts ◽

Kunter Tätte ◽

Riho Marja

Keyword(s):

Agricultural Landscape ◽

Power Lines ◽

Population Declines ◽

Habitat Features ◽

Crop Density ◽

Negative Effect ◽

Emberiza Hortulana ◽

Ortolan Bunting ◽

Overhead Power Lines ◽

Positive Effect

AbstractOrtolan buntings Emberiza hotulana have undergone one of the most severe population declines of any European farmland bird over the last thirty years. The aim of this study was to find out which habitat features, including crop characteristics, ortolan bunting prefers in Estonia in breeding areas. This study compared currently occupied and unoccupied ortolan bunting territories. Occupied areas contained significantly more tall broadleaf trees, crop types, structural elements (trees, bushes, roads, overhead power lines and buildings) and spring wheat, but also had lower crop drilling densities. Ortolan bunting territories were best described by a logistic regression model containing six variables: amount of structural point elements, length of power lines, amount of tall broadleaf trees and number of different crops had a positive effect, whereas crop density and area of autumn-sown crops had a negative effect. Based on the findings of this study, the following conservation measures can be recommended: lower crop densities; spring rather than autumn-sown crops; small-field systems containing a variety of crops; scattered scrub preserved or planted; habitat patches of permanent grasslands, hedges and tall broadleaf trees retained within the agricultural landscape.

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Effect of conventional and whole-tree clear-cutting on concentrations of some micronutrients in coniferous forest soil and plants

Forestry Studies / Metsanduslikud Uurimused ◽

10.2478/v10132-011-0051-4 ◽

2008 ◽

Vol 48 (1) ◽

pp. 5-16 ◽

Cited By ~ 5

Author(s):

Lena Grønflaten ◽

Eiliv Steinnes ◽

Göran Örlander

Keyword(s):

Forest Soil ◽

Coniferous Forest ◽

Deschampsia Flexuosa ◽

Southern Sweden ◽

Clear Cut ◽

Clear Cutting ◽

Opposite Trend ◽

Humus Layer ◽

Whole Tree ◽

Cu And Zn

Effect of conventional and whole-tree clear-cutting on concentrations of some micronutrients in coniferous forest soil and plants Increasingly intensive and mechanized clear-cutting may deplete the forest ecosystem of essential nutrients. A clear-cut area near Växjö, southern Sweden, was investigated for changes in Mn, Cu and Zn in soil (NH4NO3 extractable and HNO3 soluble) and wavy hair grass (Deschampsia flexuosa) after conventional (CC) and whole-tree clear-cutting (WTC). The soil samples were mostly iron podzols. The area consisted of four clear-cut sites, respectively 2, 4, 6 and 8 years old, and an uncut forest reference stand. Each of the clear-cuts was split in two parts representing WTC and CC sites. Manganese showed the most definite trends after clear-cutting, exhibiting higher extractable concentrations in Oe, Oa and E horizons (4-8 years after clear-cutting) and B horizons (6-8 years after clear-cutting). The increase of exchangeable Mn in the E (2-8 years) and B (4-8 years) horizons was particularly strong. Zn concentrations tended to fluctuate with time. There was a tendency to higher Mn and Zn concentrations in the humus layer especially 2 years after CC-treatment compared with WTC, whereas the opposite trend was apparent for Cu. Mn, Cu and Zn concentrations decreased in Deschampsia flexuosa 2 years after clear-cutting, possibly due to increased soil pH.

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