scholarly journals Losses and gains of fallows drive farmland bird populations over three funding periods of the EU Common Agricultural Policy

2021 ◽  
Author(s):  
Lionel Hertzog ◽  
Norbert Roeder ◽  
Claudia Frank ◽  
Hannah Boehner ◽  
Johannes Kamp ◽  
...  
Keyword(s):  
Species Richness ◽  
Habitat Preferences ◽  
Bird Species ◽  
Fallow Land ◽  
Farmland Birds ◽  
Land Area ◽  
Landscape Complexity ◽  
Bird Populations ◽  
Bird Richness ◽  
Farmland Bird

Fallow land provides habitat for threatened and declining farmland biodiversity. Policy change under the EU's Common Agricultural Policy (CAP) has been driving the area of fallows over the past decades and influenced trends in farmland biodiversity. We analyzed the impact of changes in fallow area across Germany on species richness and abundance of farmland birds over three CAP funding periods. We examined whether responses to fallow land area were modulated by species habitat preferences and landscape complexity. We combined spatial data on fallow land area from three agricultural censuses in Germany (2007, 2010 and 2016) with country-wide, annual monitoring data on farmland birds. Farmland bird species richness and the abundance of edge- and field-breeders responded positively to increases in fallows. The effect of fallows on bird richness was strongest at intermediate levels of landscape complexity. There was support for an increasing effect strength of fallow land area on field-breeders' abundance with increasing landscape complexity. We conclude that the loss of fallows in the period 2007 to 2016 resulted in strong declines of farmland birds. We predict that a future increase of the proportion of fallow land to 4%, as envisaged in the post-2020 CAP for Germany, will result in an average increase of 7% in farmland bird species richness and of 11% in average farmland bird abundance compared to 2016, but will depend on species-specific habitat preferences. Increasing the proportion of fallow land will be a key lever to stabilize and revert negative farmland bird population trends. An increase of fallow area in all but the least complex landscapes will boost farmland bird richness and abundance of field breeders. Increasing the proportion of fallow land to 4% is projected to, on average, bring farmland bird richness and abundance back to the levels observed in 2007 acknowledging that farmland bird populations were already severely depleted in 2007. A more ambitious expansion of fallow land towards 10%, such as in the context of the EU Biodiversity Strategy for 2030, should be targeted towards areas that experienced the strongest loss of fallows and towards landscapes with intermediate structural complexity.

scholarly journals Farmland bird communities in the Baltic region: impact of agricultural intensification and farmers’ attitudes

2008 ◽  
Author(s):  
Irina Herzon
Keyword(s):  
Agricultural Development ◽  
Agricultural Land ◽  
Bird Species ◽  
Agricultural Policies ◽  
Farmland Birds ◽  
Bird Abundance ◽  
Bird Populations ◽  
Farmland Bird ◽  
The Baltic ◽  
The Eu

Intensification of agricultural land-use was shown to be the key reason behind declines in wildlifespecies associated with farmland. I looked at scenarios of agricultural development across the Baltic states ofEstonia, Latvia and Lithuania, and the ways they are seen to affect farmed environments as a habitat offarmland bird species. Community richness and abundance of many farmland bird species were positivelyrelated to the number of non-cropped elements within farmland, the local mixture of annual crop and grassfields, and the variety of field types. The above positive associations were strongest in open landscapes.There was a clear indication that the more intensively farmed areas across the region provided habitat forfewer bird species and individuals. The difference could partly be explained by the more heterogeneouslandscape and field areas in the latter. Within homogenous arable fields intensification of field managementwas reflected in a tangible decrease in farmland bird abundance, especially in species in need of edgestructures.Based on the interviews in Estonia and Finland I explored farmers’ interest in and knowledge offarmland wildlife, their understanding of the concept of biodiversity, and awareness of the potential causesbehind declines of farmland birds. Many farmers viewed biodiversity from a narrow perspective oftenexcluding species directly related to farming. In Finland farmers expressed concern about the decline incommon farmland species, but Estonian farmers did not, which might be related to the fact that these speciesare still very common. In both countries farmers rated intensification of agriculture as the major drivingforce behind farmland bird declines. The expressed interest in wildlife positively correlated with willingnessto undertake wildlife-friendly measures. Only farmers with agri-environment contracts targeted specificallyat biodiversity enhancement were more knowledgeable about practical on-farm activities favouring wildlife,and were more willing to employ them that the rest.The results suggest that, by contributing to simplification of the farmland structure, homogenisationof crops, and increase in intensity of field use EU agricultural policies will have a detrimental effect onfarmland bird populations in Eastern Europe. Farmers are on the whole positive to the idea of supportingwildlife in the fields, and are concerned about its decline, but they require payments to offset their incomeloss and extra work. Biodiversity conservation should be better integrated into the agri-environmentprogrammes if it to serve as awareness tool for farmers. I argue that with a foreseen tripling of cereal yieldsacross the region, the EU Council’s Göteborg target of slowing biodiversity decline by 2010 may not berealistic unless considerable improvements are made into the EU agricultural policy for the region.

scholarly journals Seasonal changes in avian communities living in an extensively used farmland of Western Poland

2016 ◽  
Vol 2 (2) ◽  
pp. 9-18 ◽  
Author(s):  
Zbigniew Kwieciński ◽  
Federico Morelli ◽  
Marcin Antczak ◽  
Martin Hromada ◽  
Paweł Szymański ◽  
...  
Keyword(s):  
Species Richness ◽  
Protected Areas ◽  
Seasonal Changes ◽  
Bird Species ◽  
Bird Communities ◽  
Negative Trend ◽  
Avian Communities ◽  
Farmland Birds ◽  
Bird Species Richness ◽  
Bird Richness

Abstract To study the seasonal changes in avian communities, we collected data in an extensively used farmland in Western Poland during 2006-2013. Generalized additive mixed models were used in order to study the effects of seasonality and protected areas on the overall bird species richness. A similarity percentage analysis was also conducted in order to identify the species that contribute most strongly to dissimilarity among each bird according to the phenological season. Furthermore, the differences in bird communities were investigated applying the decomposition of the species richness in season, trend, and remainder components. Each season showed significant differences in bird species richness (seasonality effect). The effect of the protected areas was slightly positive on the overall species richness for all seasons. However, an overall negative trend was detected for the entire period of eight years. The bird community composition was different among seasons, showing differences in terms of dominant species. Greater differences were found between breeding and wintering seasons, in particular, the spatial pattern of sites with higher bird richness (hotspots) were different between breeding and wintering seasons. Our findings showed a negative trend in bird species richness verified in the Polish farmlands from 2006. This result mirrors the same negative trend already highlighted for Western Europe. The role of protected areas, even if slightly positive, was not enough to mitigate this decline process. Therefore, to effectively protect farmland birds, it is necessary to also consider inter-seasons variation, and for this, we suggest the use of medium-term temporal studies on bird communities’ trends.

scholarly journals Quantifying Effects of Spatial Heterogeneity of Farmlands on Bird Species Richness by Means of Similarity Index Pairwise

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Federico Morelli
Keyword(s):  
Species Richness ◽  
Spatial Heterogeneity ◽  
Central Italy ◽  
Bird Species ◽  
Similarity Index ◽  
Bird Communities ◽  
Bird Species Richness ◽  
Bird Richness ◽  
Farmland Bird ◽  
The Impact

Many studies have shown how intensification of farming is the main cause of loss biodiversity in these environments. During the last decades, agroecosystems in Europe have changed drastically, mainly due to mechanization of agriculture. In this work, species richness in bird communities was examined on a gradient of spatial heterogeneity of farmlands, in order to quantify its effects. Four categories of farmland spatial heterogeneity were defined, based on landscape and landuse parameters. The impact of features increasing the spatial heterogeneity was quantified comparing the similarity indexes between bird communities in several farmlands of Central Italy. The effects of environmental variables on bird richness were analyzed using GLM. The results highlighted that landscape features surrogates of high nature values (HNVs) of farmlands can increase more than 50% the bird species richness. The features more related to bird richness were hedgerows, scattered shrubs, uncultivated patches, and powerlines. The results confirm that the approach based on HNV for evaluating the farmlands is also suitable in order to study birds’ diversity. However, some species are more sensitive to heterogeneity, while other species occupy mainly homogeneous farmlands. As a consequence, different conservation methods must be considered for each farmland bird species.

scholarly journals Developing indicators for European birds

2005 ◽  
Vol 360 (1454) ◽  
pp. 269-288 ◽  
Author(s):  
Richard D Gregory ◽  
Arco van Strien ◽  
Petr Vorisek ◽  
Adriaan W Gmelig Meyling ◽  
David G Noble ◽  
...  
Keyword(s):  
National Level ◽  
Bird Species ◽  
Population Data ◽  
Biodiversity Loss ◽  
Farmland Birds ◽  
Conservation Action ◽  
Breeding Bird ◽  
Field Methods ◽  
Biodiversity Indicators ◽  
Farmland Bird

The global pledge to deliver ‘a significant reduction in the current rate of biodiversity loss by 2010’ is echoed in a number of regional and national level targets. There is broad consensus, however, that in the absence of conservation action, biodiversity will continue to be lost at a rate unprecedented in the recent era. Remarkably, we lack a basic system to measure progress towards these targets and, in particular, we lack standard measures of biodiversity and procedures to construct and assess summary statistics. Here, we develop a simple classification of biodiversity indicators to assist their development and clarify purpose. We use European birds, as example taxa, to show how robust indicators can be constructed and how they can be interpreted. We have developed statistical methods to calculate supranational, multi-species indices using population data from national annual breeding bird surveys in Europe. Skilled volunteers using standardized field methods undertake data collection where methods and survey designs differ slightly across countries. Survey plots tend to be widely distributed at a national level, covering many bird species and habitats with reasonable representation. National species' indices are calculated using log-linear regression, which allows for plot turnover. Supranational species' indices are constructed by combining the national species' indices weighted by national population sizes of each species. Supranational, multi-species indicators are calculated by averaging the resulting indices. We show that common farmland birds in Europe have declined steeply over the last two decades, whereas woodland birds have not. Evidence elsewhere shows that the main driver of farmland bird declines is increased agricultural intensification. We argue that the farmland bird indicator is a useful surrogate for trends in other elements of biodiversity in this habitat.

scholarly journals Low effect on open-farmland birds of young afforestations in heterogeneous Mediterranean croplands

2014 ◽  
Author(s):  
Juan S. Sánchez-Oliver ◽  
José M. Rey Benayas ◽  
Luis M. L.M. Carrascal
Keyword(s):  
Species Richness ◽  
Bird Species ◽  
Agricultural Landscapes ◽  
Tree Plantations ◽  
Conservation Value ◽  
Farmland Birds ◽  
Negative Effects ◽  
Bird Species Richness ◽  
Positive Effects ◽  
The One

Afforestation programs such as the one promoted by the EU Common Agricultural Policy have spread tree plantations on former cropland. These afforestations attract generalist forest and ubiquitous species but may cause severe damage to open habitat species, especially birds of high conservation value. We investigated the effects of young (< 20 yr) tree plantations dominated by pine P. halepensis on bird communities inhabiting the adjacent open farmland habitat in central Spain. We hypothesize that pine plantations with larger surface, and areas at shorter distances from plantations, would result in lower bird species richness and conservation value of open farmland birds. Regression models controlling for the influence of land use types around plantations revealed significant positive effects of distance to pine plantation edge on community species richness in winter, and negative effects on an index of conservation concern (SPEC) during the breeding season. However, plantation area did not have any effect on species richness or community conservation value. Our results indicate that pine afforestation of Mediterranean cropland in heterogeneous agricultural landscapes has an overall low detrimental effect on bird species that are characteristic of open farmland habitat.

scholarly journals Avian species–area relationships indicate that towns are not different from natural areas

2018 ◽  
Vol 45 (4) ◽  
pp. 419-424 ◽  
Author(s):  
SIMONE FATTORINI ◽  
GIULIA LIN ◽  
CRISTINA MANTONI
Keyword(s):  
Species Richness ◽  
Urban Areas ◽  
Bird Species ◽  
Avian Species ◽  
Conservation Priorities ◽  
Natural Areas ◽  
Bird Richness ◽  
Negative Effect ◽  
Species Area ◽  
Human Density

SUMMARYUrban areas host many bird species, and urban species richness can be compared with that in natural areas using species–area relationships (SARs). We used a multimodel selection approach to investigate the influence of area, human population, elevation and climatic variables on species richness of breeding birds from 34 towns and 54 nature reserves in Italy. Using the linearized power function, area was identified as the most important correlate of avian species richness in both urban and natural areas. The SARs did not differ significantly between towns and reserves, although human density had a negative effect on bird richness. These findings underline the possible importance of urban areas in biodiversity conservation, but also stress that human density is a factor reducing species richness. However, species richness alone cannot inform conservation priorities because it does not take into account the different conservation values of species.

scholarly journals USE OF RESTORATION PLANTINGS TO ENHANCE BIRD SEED DISPERSAL AT THE ROADSIDE: FAILURES AND PROSPECTS

2015 ◽  
Vol 23 (4) ◽  
pp. 302-311 ◽  
Author(s):  
Rocío de TORRE ◽  
María Dolores JIMÉNEZ ◽  
Álvaro RAMÍREZ ◽  
Ignacio MOLA ◽  
Miguel A. CASADO ◽  
...  
Keyword(s):  
Species Richness ◽  
Seed Dispersal ◽  
Agricultural Landscape ◽  
Bird Species ◽  
Ecological Processes ◽  
Frugivorous Birds ◽  
Bird Droppings ◽  
Bird Richness ◽  
Species Richness And Abundance

Plantings are commonly used in roadside reclamation for ornamental purposes and for increasing slope stability and road safety. However, the role of these plantings in restoring ecological processes, such as seed dispersal, has received little attention. We carried out a study to assess the potential role of plantings on roadside embankments to attract frugivorous birds and to enhance seed dispersal mediated by birds from the surrounding landscape. We examined: (1) bird species richness and abundance; (2) patterns of avian spatial distribution within embankments and (3) seed dispersal mediated by birds. Bird richness and abundance did not differ between embankments with and without plantings. However, birds were not distributed randomly within embankments, with levels of species richness and abundance for facultative frugivorous between 4.8–8 times higher in areas closer to plantings. An analysis of bird droppings showed that birds only dispersed seeds of the planted species since no seeds of woody plants from matrices were detected. These results suggest that plantings acted as selective bird attractors, providing food and perches for frugivorous species. Nevertheless, the scarcity of seed-dispersing birds in the surrounding agricultural landscape prevented plantings from enhancing seed dispersal and connectivity to adjacent habitat.

scholarly journals Metrics of Lidar-Derived 3D Vegetation Structure Reveal Contrasting Effects of Horizontal and Vertical Forest Heterogeneity on Bird Species Richness

2019 ◽  
Vol 11 (7) ◽  
pp. 743 ◽  
Author(s):  
Luis Carrasco ◽  
Xingli Giam ◽  
Monica Papeş ◽  
Kimberly Sheldon
Keyword(s):  
Species Richness ◽  
Bird Species ◽  
Structural Heterogeneity ◽  
Bird Species Richness ◽  
Vegetation Height ◽  
Vertical Heterogeneity ◽  
Animal Diversity ◽  
Bird Richness ◽  
Structural Metrics ◽  
Variance Explained

The structural heterogeneity of vegetation is a key factor for explaining animal diversity patterns at a local scale. Improvements in airborne light detection and ranging (lidar) technologies have enabled researchers to study forest 3D structure with increasing accuracy. Most structure–animal diversity work has focused on structural metrics derived from lidar returns from canopy and terrain features. Here, we built new lidar structural metrics based on the Leaf Area Density (LAD) at each vegetation height layer, and used these metrics to study how different aspects of forest structural heterogeneity explain variation in bird species richness. Our goals were to test: (1) whether LAD-based metrics better explained bird species richness compared to metrics based on the top of the canopy; and (2) if different aspects of structural heterogeneity had diverse effects on bird richness. We used discrete lidar data together with 61 breeding landbird points provided by the National Ecological Observatory Network at five forest sites of the eastern US. We used the lidar metrics as predictors of bird species richness and analyzed the shape of the response curves against each predictor. Metrics based on LAD measurements had better explanatory power (43% of variance explained) than those based on the variation of canopy heights (32% of variance explained). Dividing the forest plots into smaller grids allowed us to study the within-plot horizontal variation of the vertical heterogeneity, as well as to analyze how the vegetation density is horizontally distributed at each height layer. Bird species richness increased with horizontal heterogeneity, while vertical heterogeneity had negative effects, contrary to previous research. The increasing capabilities of lidar will allow researchers to characterize forest structure with higher detail. Our findings highlight the need for structure–animal diversity studies to incorporate metrics that are able to capture different aspects of forest 3D heterogeneity.

scholarly journals Avian richness of the Basanta Protected Forest, far-western lowland Nepal: Implication for conservation

2020 ◽  
Vol 4 (2) ◽  
pp. 68-84
Author(s):  
Hiru Lal Dangaura ◽  
Naresh Pandey ◽  
Dhirendra Bahadur Chand ◽  
Krishna Prasad Bhusal
Keyword(s):  
Species Richness ◽  
National Park ◽  
Bird Species ◽  
Temporal Distribution ◽  
Avian Community ◽  
Conservation Implications ◽  
The Family ◽  
Farmland Bird ◽  
Baseline Information ◽  
Gyps Bengalensis

Birds are important components of biodiversity and acts as an indicator of habitat quality, productivity and stability. This study aimed to document species richness and assess the temporal distribution pattern of globally threatened bird species in the Basanta Protected Forest (BPF), one of the largest corridor forests which connects Dudhwa National Park (India) with protected areas of western lowland Nepal. During study period of ten years from 2010 to 2019, a total of 381 bird species from 78 families of 19 orders were recorded. Order Passeriformes had the highest species richness (n=180) followed by order Accipitriformes and Charadriiformes. Among the families, the family Muscicapidae had the highest species richness (n=31), followed by Accipitridae and Anatidae. Majority of bird recorded were forest bird followed by wetland and farmland bird species. Fifteen globally threatened species like red-headed vulture (Sarcogyps calvus), white-rumped vulture (Gyps bengalensis), slender-billed vulture (Gyps tenuirostris), steppe eagle (Aquila nipalensis) and Egyptian vulture (Neophron percnopterus) were recorded in the BPF. Extensive avian survey in the BPF is important for further exploration of avian community along with its driving factors, which might play a crucial role in developing baseline information and implementing conservation implications.

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