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24 results for “farmland bird”
Raw data for: Spatial and temporal variation in farmland bird nesting ecology: Implications for effective Corn Bunting Emberiza calandra conservation
<p>These are raw data accompanying the study "<span>Spatial and temporal variation in farmland bird nesting ecology: Implications for effective Corn Bunting Emberiza calandra conservation</span>". All information on data origin, data analysis, and derived implications will be available with the original publiation.</p>
Linking agri-environment scheme habitat area, predation and the abundance of chick invertebrate prey to the nesting success of a declining farmland bird
<p>Across Europe, farmland bird populations have continued to decline since the 1970s owing to the intensification of farming practices. Studies of such declines have tended to focus specifically on either the impacts of habitats (nesting and foraging), nest predators or prey availability on bird demographics. The study presented here provides new insights into the relative effects of each of these factors on Yellowhammer nest survival. The Yellowhammer was selected for this study as it is a UK red-listed bird species whose population is in decline across much of Europe. We use a long-term dataset of 147 nests, monitored between 1995 and 2007, to provide an insight into how Yellowhammer nest survival is influenced by nesting habitat (nest concealment and nest height), foraging habitats (habitat coverage within 100 m of nests), the removal of nest predators (Magpie Pica pica abundance as an inverse measure of avian predator removal through gamekeeping) and food availability (measured with a D-vac invertebrate suction sampler). Our results indicated that Yellowhammer hatching success was negatively related to the coverage of spring agri-environment scheme habitats, a group which represents invertebrate-rich agri-environment habitats, but hatching success increased with nest height. Fledging success was positively related to the coverage of the seed-rich habitat Wild Bird Seed mixture. The farm-level abundance of Yellowhammer chick-food invertebrates declined over the study period. Our results highlight the importance of simultaneously considering multiple agents that shape avian breeding success, i.e. their ability to produce offspring, to inform conservation management. Our key finding for land managers relates to the positive relationship between the proportion seed rich foraging habitat within the Yellowhammer's average foraging range and Yellowhammer fledging success, which shows that a habitat intended primarily to provide winter food resources is also important to breeding birds. Chick food abundance in this habitat was, however, similar to broadleaf and cereal crops. We recommend that this habitat should be provided near to potential Yellowhammer nesting sites and adjacent to invertebrate-rich agri-environment scheme habitats such as beetle banks and conservation headlands to further boost invertebrate resources for a declining farmland bird.</p>
Functional responses in habitat selection as a management tool to evaluate agri-environment schemes for farmland birds
<p>The folder "functional_responses.zip" contains data analyzed for "Functional responses in habitat selection as a management tool to evaluate agri-environment schemes for farmland birds"</p> <p>The raw LPIS/IACS data are owned by the Saxon State Ministry for Energy, Climate Protection, Environment and Agriculture; they hold sensitive information and hence cannot be made publicly available. They can be requested from the agency for research purposes.</p> <p>Processed data are retrievable from .RDATA in "rdata_mixed_model" and "rdata_functional_responses" folders.</p> <p>"rscript" folder contains R functions of JAGS codes (jags_code.R), data processing (process.R), utility functions (utils.R), and figures (figure_all.R or figure_all_by_sp.R).</p> <p>Dg: Common whitethroat (Curruca communis)</p> <p>Fl: Eurasian skylark (Alauda arvensis)</p> <p>G: Yellowhammer (Emberiza citrinella)</p> <p>Ga: Corn bunting (Emberiza calandra)</p> <p> </p> <p>If you have questions regarding data, please contact ryo.ogawa@uni-bonn.de.</p>
Reversing declines in farmland birds: how much agri-environment provision is needed at farm and landscapes scales?
<p>1) Agri-environment schemes (AES) are the primary policy mechanism for addressing farmland biodiversity declines across Europe. Despite previous studies on the impacts of AES on biodiversity, there is little empirical evidence on the scale of provision required to reverse declines.</p> <p>2) Across three regions of lowland England with contrasting farm systems (arable, pastoral, mixed) we estimated avian Population Growth Rates (PGRs) on farmland with high AES provision ('higher-tier': average bird-friendly option cover = 7.4%), low AES provision ('lower-tier': 2.3%), and no bird-friendly AES ('no AES'). Ten-year PGRs were derived for 24 species and three multi-species groups comprising farmland-associated species ('farmland birds'), species of conservation concern ('priority birds'), and species restricted to farmland ('specialist birds'). We used PGRs to simulate the proportion of the regional farmland landscape that would have to be assigned to higher- and lower-tier agreements to stabilise or increase populations.</p> <p>3) In the arable and pastoral regions, 13/23 and 13/22 species respectively had more positive PGRs under higher-tier AES than on no AES farmland (none had more negative PGRs), compared to 4/22 (positive) and 1/22 (negative) in the mixed region. Only 2-4 species per region exhibited more positive PGRs under lower-tier AES compared to no AES farmland.</p> <p>4) Multi-species PGRs in the arable and pastoral regions increased from no AES (strong decline), to lower-tier (decline or stability) to higher-tier (moderate or strong increase). There was no overall AES effect in the mixed region.</p> <p>5) To increase regional farmland bird populations by 10% over 10-years, 47% and 26% of the farmed landscape would need to be devoted to higher-tier agreements in arable and pastoral landscapes respectively. This falls to 34% and 17% when higher-tier is targeted at localities supporting higher abundances of target species, and to 29% and 10% when 30% of the farmed landscape is also devoted to lower-tier. Priority and specialist birds require higher provision levels.</p> <p>6) Policy implications. Where farmland bird recovery is an AES objective, farms should prioritise higher-tier agreement delivery over lower-tier. Farmland bird responses to AES provision are likely to vary regionally but careful targeting will reduce the amount needed in the landscape.</p>
Year-round evaluation of the conservation potential of seed-rich field margins under agri-environmental schemes for farmland birds, European hares, and common hamsters
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Species-specific responses of farmland birds to overhead powerlines
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Reversing declines in farmland birds: how much agri-environment provision is needed at farm and landscapes scales?
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Linking agri-environment scheme habitat area, predation and the abundance of chick invertebrate prey to the nesting success of a declining farmland bird
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Landscape context mediates the physiological stress response of birds to farmland diversification
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Data from: Sensitivity of the farmland bird community to crop diversification in Sweden: does the CAP fit?
Crop diversification has been introduced as an environmental strategy in the 'Greening' of the EU Common Agricultural Policy (CAP) for 2015–2020. The primary target of crop diversification is soil and ecosystem resilience, but claims for potential benefits for farmland biodiversity are also common. However, understanding of relationships between the number (compositional heterogeneity) and spatial arrangement (configurational heterogeneity) of crop fields and biodiversity is generally poor, making such claims relatively unfounded. In this study, we monitored crop and farmland bird diversity on 178 farms across Sweden's main agricultural areas. From a pre-implementation assessment, we show that >97% of the assessed farms would not be required to change their management under the CAP crop diversification measure (minimum of three crops for farms with 30+ ha), suggesting that this measure has generated little change on Swedish farms. While accounting for non-crop elements and farming system (conventional or organic), we show that crop structural diversity (i.e. the management and vegetation structure of crops) rather than crop diversity senso lato positively affected richness of non-crop breeding bird species with stronger effects in arable, compared with forest-dominated landscapes. No such effects were observed among field-nesting farmland bird species. Organic farming had little influence on farmland birds with positive effects only in the most arable-dominated landscapes and for field-nesting species only. In forest-dominated landscapes, organic farms even held lower field-nester densities compared with conventional farms, possibly due to the dominance of grasslands on organic farms that in these landscapes support lower densities of field-nesting species compared with cereals. Policy implications. Our study illustrates the importance of a consideration of structural instead of species diversity of crops for biodiversity, in this case farmland birds. We also underline the absence of such a distinction in current EU Common Agricultural Policy Greening, while simultaneously setting levels on crop diversification too low resulting in little to no change in landscape-scale crop diversity on Swedish farmland. We recommend that future efforts to manage farmland biodiversity should include ways of increasing the structural diversity of crops at the scale of farms and landscapes.
Taxonomic and functional homogenization of farmland birds along an urbanization gradient in a tropical megacity
<p>Urbanization is a major driver of land use change and biodiversity decline. While most of the ongoing and future urbanization hot spots are located in the Global South, the impact of urban expansion on agricultural biodiversity and associated functions and services in these regions has widely been neglected. Additionally, most studies assess biodiversity responses at local scale (α-diversity), however, ecosystem functioning is strongly determined by compositional and functional turnover of communities (β-diversity) at regional scales. We investigated taxonomic and functional β-diversity of farmland birds across three seasons on 36 vegetable farms spread along a continuous urbanization gradient in Bangalore, a South Indian megacity. Increasing amount of grey area in the farm surroundings was the dominant driver affecting β-diversity and resulting in taxonomic and functional homogenization of farmland bird communities. Functional diversity losses were higher than expected from species declines (i.e. urbanization acts as an environmental filter), with particular losses of functionally important groups such as insectivores of crop pests. Moreover, urbanization reduced functional redundancy of bird communities, which may further weaken ecosystems resilience to future perturbations. Our study underscores urbanization as a major driver of taxonomic and functional homogenization of species communities in agricultural systems, potentially threatening crucial ecosystem services for food production.</p>
Why do open-farmland specialist birds prefer small fields? The evaluation of mechanisms using a cross-border study
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Do human infrastructures shape nest distribution in the landscape depending on individual personality in a farmland bird of prey?
<p>1. Individuals´ distribution across habitats may depend on their personality. Human activities and infrastructures are critical elements of the landscape that may impact the habitat selection process. However, depending on their personality, individuals may respond differently to these unnatural elements.</p> <p>2. In the present study, we first investigated whether some human infrastructures (buildings, roads and paths) shaped Montagu's harrier nest spatial distribution in the landscape according to female personality (boldness). Second, we tested if the reproductive success of females depended on their boldness and nest location regarding infrastructures.</p> <p>3. Using a long-term (19 years) data set, we calculated the distance from each nest to the nearest infrastructure type and the density of each infrastructure type around the nest. We tested the effects of female boldness (bold vs. shy) and its interaction with egg-laying date on these six metrics.</p> <p>4. Nest location in the landscape depended on female personality and on some human infrastructures: the building density was smaller around nests from shy females than from bold ones. Nest distribution related to other infrastructure metrics did not depend on female boldness. The pattern related to building density is consistent with some habitat choice hypotheses which are discussed. Path density around nests negatively affected reproductive success regardless of female boldness, and late breeders nested further away from paths than early breeders. Human activities on paths (more common later in the season) could lead to disturbance and a decrease in parental care, reducing reproductive success.</p> <p>5. Increasing human presence in farmlands implies a need to better understand its impact on population composition, in terms of personality. Our results suggest that individual behavioural differences should be taken into account in studies assessing the effects of human disturbance on animal populations, to propose more appropriate conservation measures.</p>
Factors shaping insectivorous farmland bird abundance in intensively cultivated arable fields: insights through the former Iron Curtain
<p>Data set to the results of the research article published in Agriculture, Ecosystems and Environment.</p>
Interactive effects of multiscale diversification practices on farmland bird stress
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Data from: Sensitivity of the farmland bird community to crop diversification in Sweden: does the CAP fit?
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Data from: The importance of size, location and vegetation composition of perennial fallows for farmland birds
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Data from: Quantifying the links between land use and population growth rate in a declining farmland bird
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Taxonomic and functional homogenization of farmland birds along an urbanization gradient in a tropical megacity
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The potential of fallow management to promote steppe bird conservation within the next EU Common Agricultural Policy reform: Distance sampling dataset on farmland bird community
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