Assessing impact of forest cover change dynamics on high nature value farmland in Mediterranean mountain landscape

High nature value farmland increases taxonomic diversity, functional richness and evolutionary uniqueness of bird communities

Summary 1. Farmland biodiversity continues to decline mainly because of agricultural intensification and land abandonment. Agri‐environment schemes can be designed to halt this loss by favouring extensification of agricultural practices and through sympathetic management of field boundaries and fallow land. In Europe, High Nature Value (HNV) farmland is defined as low‐intensity farmland supporting or associated with a high rate of biodiversity, in terms of species richness or habitat diversity and therefore plays a crucial role in the maintenance of European biodiversity. However, no large‐scale analysis has explored the role of these areas in achieving conservation goals. 2. We analysed information from widely used indicators in order to describe the impact of low‐intensity agriculture on farmland biodiversity in France. We used the HNV farmland indicator, based on agricultural statistics such as the Farm Structure Survey and the grassland survey, and common bird indicators, i.e. the Farmland Bird Indicator (FBI), the Community Specialization Index (CSI) and species richness indexes, based on the French Breeding Bird Survey. 3. Temporal trends in the farmland bird indicator showed that populations of farmland birds were more likely to increase inside HNV areas compared to non‐HNV areas. Although species richness is not higher within HNV farmland, bird communities are composed by more specialist species than in non‐HNV areas. In addition, these specialist bird species are significantly more abundant in HNV areas. 4. Synthesis and applications. Further farmland biodiversity decline is potentially reversible through an appropriate management of HNV areas. Existing and future agri‐environment schemes should focus on preserving and extending HNV farmland, by favouring the maintenance of low‐intensity agriculture and landscape complexity. Priority should be given to preserving diversity at the community level, with the help of adequate indicators, such as the ones presented here. The role of HNV farmland or similar concepts in combining agriculture and biodiversity goals should be further analysed and further used as large‐scale conservation tools.

High Nature Value farmland identification from satellite imagery, a comparison of two methodological approaches

This chapter describes the characteristics of low-input farming systems in terms of biodiversity and management practices and introduces the term 'high nature value (HNV) farmland'. Conservation of biodiversity on agricultural land is an objective of the Pan-European Biodiversity and Landscape Strategy, the Bern Convention, the European Landscape Convention, and, at European Union (EU) level, the Habitats and Birds Directives and the Rural Development Policy. The aim of estimating HNV farmland distribution at European level according to a standardised method is to gain insight into the current status, as well as enabling analysis of European trends and targeting of relevant policy instruments. In a number of cases the Europe-wide exercise could be improved with national data, allowing a more precise identification of HNV farmland within the overall conceptual framework. For each combination of country and environmental zone, CORINE Land Cover (CLC) classes are identified that are likely to contain HNV land.Keywords: CORINE Land Cover (CLC) classes; European Union (EU) 27; high nature value (HNV) farmland; low-input farming systems

Preventing biotic homogenization of farmland bird communities: The role of High Nature Value farmland

Synergies between biodiversity conservation and drinking water protection in an agriculture dominated landscape – Case study of the Lower Savinja Valley in Slovenia

Background. Since the High Nature Value (HNV) concept was defined in the early 1990s, several studies on HNV farmland has been increasing over the past 30 years in Europe, highlighting the interest by scientific community of HNV farming systems supporting biodiversity conservation. The aim of this study was to evaluate the trends and main gaps on HNV farmland peer-reviewed publications in order to contribute to the effectiveness of future research in this field. Methods. Searches were conducted using the databases Web of SciencesTM and Scopus in order to identify only peer-reviewed articles on HNV farmland, published prior to July 2017. The inclusion and exclusion criteria were developed a priori. Data as year, country, type of document, subject area, taxa studied and biodiversity metrics assessed were extracted and explored in order to analyse the spatial and temporal distribution of the concept, including the main topics addressed in HNV farmland literature. Results. After screening 308 original articles, 90 were selected for this review. HNV farmland studies involved several disciplines, mainly biodiversity and conservation and environmental sciences and ecology. Most peer-reviewed articles focused on HNV farming were conducted in Spain, Italy, Ireland and Portugal. The main studied taxa were plants and birds. Taxonomic diversity was the biodiversity metric more often used to assess the biodiversity status on HNV farmland areas. A positive correlation was found between HNV farmland area and HNV farmland studies conducted in respective countries. Discussion. The HNV farmland research subject is a relative novel approach, and this systematic review provides a comprehensive overview about the main topics in the HNV farmland peer-reviewed literature contributing to highlight the main gaps and provide some considerations in order to assist the performance of HNV farming systems and conservation policies, addressed to sustain high levels of biodiversity.

Climate change and land use land cover (LULC) changes are recognised as two of the most significant causes of environmental change. Climate change and LULC changes are related to one another. Land use change may drive climate change, and a changing climate may result in land cover changes. Climate change and LULC changes are believed to influence soil erosion. This chapter analyses the impacts of climate and LULC changes on soil erosion. The causes and effects of climate change on precipitation, temperature, solar radiation, atmospheric CO2 concentrations, and radiative forcing are discussed. The chapter includes the impacts of climate change on soil characteristics, vegetation cover, runoff, floods, and droughts and extends the impacts of these changes on water and wind erosion. The chapter explores the human alterations of LULC changes in terms of changes in the forest cover, alterations in agricultural lands, increase in urban areas, and decrease in wetland areas. The influence of the LULC changes on soil erosion and sediment production processes is discussed. Also, the combined impact of climate and LULC changes on soil erosion is explored, and mitigation strategies like sustainable land management practices and appropriate policy incentives to conserve soil are discussed.

The main objective of the paper is to inquiry if the Agri-Environmental Schemes (AES’s) included in the Rural Development Plan in Emilia Romagna have played a role in enhancing the Nature Value of regional farmland. High Nature Value (HNV) farmland is a concept that aims to identify the agricultural systems which are hospitable to animal and vegetal species, leading to a level of biodiversity which is particularly high. As a preliminary step, we measured the level and distribution of the HNV in Emilia Romagna at the municipality level, as derived by elaborations on the data of the two last censuses, year 2000 and 2010. Then the relationship between HNV and participation to rural development measures is analyzed in both directions of causality with econometric techniques. First we investigated the relationship between the participation to measure 214 (AES’s) of the Rural Development Plan and the HNV in order to explore if the participation is affected by the HNV. Rather than integrated farming or the protection of less favoured areas, ordinary least square models suggest a link between organic farming and HNV farmland: the results indicate that participation to the measure of organic farming in the Rural Development Plan 2007-2013 is significantly dependent upon the HNV in year 2000. Secondly, as an effect of the participation to AES’s on the HNV we analyzed the change of HNV between 2000 and 2010 with ordinary least squares and spatial regression techniques. The regression models show that the variations depend upon the farmers’ participation to the organic farming measure and the presence of a mountainous territory. With regard to the other measures, integrated farming is not relevant and the participation to the measure for less favoured areas is related to the variation in a negative way.

Low-intensity agriculture is important for the conservation of many European habitats and species. However, biodiverse farmlands-also referred to as high nature value (HNV) farmlands-are threatened by years of agricultural intensification and land abandonment. Considering the ongoing changes in land-cover-evident throughout Europe-it is important to assess how land transformation is affecting HNV farmlands. Here, we evaluate land-cover changes within HNV farmlands during 2006-2018. We find that HNV farmlands inside Natura 2000 sites are less likely than those outside to be converted to artificial surfaces and more likely to maintain mosaic farming. However, land transformation patterns vary between member states, suggesting that different processes are driving the land-cover changes within each state. We recommend that member states support HNV farmers by making a more effective use of the Common Agricultural Policy (CAP) and that the EU prioritizes the protection of HNV farmlands during its next CAP reform post-2020.


 
 
 Floods are one of the most common natural disasters worldwide. Apart from rainfall, Land Use Land Cover (LULC) changes too are a main contributory factor for floods. This study attempted to understand the link between floods and LULC changes in Kalu river basin, which is the second largest river basin and an area that experiences recurrent floods in Sri Lanka. We studied peak water levels, number of flood events, changes in land use types and impacts in rapidly urbanizing two districts, Rathnapura (upper basin) and Kalutara (lower basin) during 2001-2020. The satellite images (LANDSAT) were obtained for 2001, 2009, 2015 and 2020 and land use classification was done using ArcGIS and Remote Sensing Tools. Main land use types and their transformations were investigated and ground-truthing was carried out. Accordingly, the main types of land uses identified were Natural Vegetation and forests (NV), Settlements (ST- housing and industrial lands), Cultivated Lands (CL), Water Bodies (WB) and Bare Lands (BL). The results indicated that the most drastic change was found in the natural areas (NV) and they have diminished while the lands with anthropogenic impacts (ST, CL and BL) have increased across years. The NV had occupied the highest land area in 2001 (42.4%) and has reduced by 14.2% by 2020. The ST and CL have increased by 8.6 % and 5.2% respectively. The monthly rainfall of Rathnapura and Kalutara (Source: Department of Meteorology, Sri Lanka) has increased with time, which is a main reason for the increasing peak water levels of these areas (Source: Department of Irrigation, Sri Lanka). However, a significant correlation also exists between the change of the settlement area with the peak river water levels in the lower basin (p=0.03, R2=99%; regression analysis). Rathnapura has experienced 3 major floods (floods above the high water alert level) from 2001-2020, while 16 major floods have occurred in Kalutara. During the major flood in 2017, the number of child deaths in Rathnapura was 14 while in Kalutara it was 24. Accordingly, the LULC changes of the whole basin along with rainfall seem to influence on the severity of floods in Kalutara more, as it is located in the lowest elevation level. When natural lands are transformed to anthropogenic- impacted areas with disturbances to the water cycle, increased impervious surfaces, reduced water storage capacities and loss of natural drainage, the flood risk tends to increase. Proactive approaches including proper land use planning and rainwater storage are urgently needed as the climate change too would trigger more floods. Thus, the flood mitigatory actions, especially, in the lower river basin should be a priority to ensure resilience and sustainability.
 Keywords: Kalu river basin, Land Use Land Cover (LULC) changes, Floods
 
 

Understanding the impacts of Land Use and Land Cover (LULC) changes and their drivers is crucial for sustainable management of natural resources. Thus, this rigorous study aimed to examine the trends, drivers, and consequences of land use land cover changes (LULC) in the Lake Ziway catchment, central rift valley of Ethiopia. The study followed a mixed- methodological systematic and justified approach that included remote sensing and GIS techniques, household surveys, focus group discussions, and in-depth interviews. The rigorous study shows that the conversion of forest land into agricultural and settlement lands is the major detected LULC change over the last 30 years in the catchment. Cultivated land has increased by 40.60% and settlement and plantation lands have increased by 61.54% and 60%, respectively. On the other hand, forest land decreased by 54.85% and grazing land have decreased by 15.85% respectively. Water bodies and wetlands have also decreased by 8.70% and 19.32% area coverage, respectively. Both the direct and indirect driving forces of the LULC changes were identified. The study also indicates that the participation of local communities in watershed management is low. The study further indicates that LULC changes observed in the Lake Ziway Catchment had statistically and practically significant environmental and socio-economic impacts. Over all, the rigorous study showed the changes in land use land cover and its drivers were common in Lake Ziway Catchment. Therefore, appropriate policies and strategies are required to address LULC change impacts and enhance sustainable utilization and management of the Lake Ziway catchment.

Bangladesh has undergone dramatic land use and land cover changes (LULCC) in recent years, but no quantitative analysis of LULCC drivers at the national scale exists so far. Here, we quantified the drivers of major LULCC in combination with biophysical and socioeconomic observations at the sub-district level. We used Landsat satellite data to interpret LULCC from 2000 to 2010 and employed a Global Surface Water Dataset to account for the influences of water seasonality. The results suggest that major LULCC in Bangladesh occur between agricultural land and waterbodies and between forest and shrubland. Exclusion of seasonal waterbodies can improve the accuracy of our LULCC results and driver analysis. Although the gross gain and loss of agricultural land are large on the local scale, the net change (gross gain minus gross loss) at a country scale is almost negligible. Climate dynamics and extreme events and changes in urban and rural households were driving the changes from forest to shrubland in the southeast region. The conversion from agricultural land to standing waterbodies in the southwest region was mainly driven by urban household dynamics, population growth, distance to cities and major roads, and precipitation dynamics. This study, which is the first effort accounting for water seasonality and quantifying biophysical and socioeconomic drivers of LULCC at the national scale, provides a perspective on overall LULCC and underlying drivers over a decadal time scale and national spatial scale and can serve as a scientific basis for developing land policies in Bangladesh.

Low-input and large scale grazing systems (LSGS) in Europe are at a crossroads and are facing two contrasting threats: intensification and abandonment (the most extreme form of extensification). Paradoxically, these LSGS constitute large tracts of European rural land in the less favored areas (LFA), which harbor a great part of high nature value (HNV) farmland. Natural and cultural values depend on continuity of the traditional farming practices and this on the social and economic sustainability of the respective farming systems. In this report, we argue that understanding the social dynamic and main binding constraints of particular LSGS is a precedent to institutional reforms and devising sensible schemes of policy support. A community-based research approach with stakeholders' participation was devised within the EU-funded LACOPE research project and applied to five European LSGS. A more structured approach with three phases of the diagnostic methodology and corresponding data is presented for the cereal-sheep farming system of Castile-La Mancha (South-Central Spain). Comparative data are presented for other four European LSGS: the reindeer herding in northernmost Fennoscandia (Northern Sapmi); sheep grazing in the Carpathian (Tatra) mountains of Poland; and heifers' rearing on the Alps in the UNESCO Biosphere Reserve Entlebuch (Switzerland) and Upper Bavaria (Germany). Results in the cereal-sheep systems showed congenial views (social consensus) on the main constraints between the two principal stakeholders, but uncooperative attitudes and lack for social cohesion. Comparative results indicated a common ground of abandonment of the less-favored and far-reaching grazing areas with causes related to inter-Scandinavian border barriers (Northern Sapmi), intensification of more-favored lowland farms (Entlebuch and Upper Bavaria) and lack of social cohesion and structural constraints (Tatra and Castile-La Mancha). A social sustainability tier should be included into the Rural Development guidelines of the EU for actions in HNV farmland, but regional strategy plans should be adapted to particular social dynamic of European LSGS.

Farmlands are currently among the dominant uses of the land. When managed under low‐input farming systems, farmlands are associated with diverse cultural and natural heritages around the world. Known in Europe as high nature value (HNV) farmlands, these agricultural landscapes and their associated farming systems evolved as tightly coupled socioecological systems, and are essential to biodiversity conservation and the delivery of ecosystem services to society. However, HNV farmlands are vulnerable to socioeconomic changes that lead to either agricultural intensification or land abandonment. We present a range of plausible future scenarios for HNV farmlands, and discuss the related management options and expected socioecological outcomes for each scenario. We then provide recommendations for policy, practice, and research on how to best ensure the socioecological viability of HNV farming systems in the future.