The role of artificial ditches and their buffer zones in intensively utilized agricultural landscape

The extensive construction of drainage systems in the lowlands and flood plains of Slovakia has significantly changed the landscape and runoff ratios of rivers. Our study focuses on the assessment of the benefits provided by the ecosystems of water ditches and their catchment areas. Ditches and their buffer zone, similarly to other artificial anthropogenic elements in the country, fulfil various landscape-ecological functions and provide different ecosystem services (ESs) to human populations and society. As study areas, we chose ditches and their 1-km buffer zones in the Podunajská nížina (P) lowland and Východoslovenská nížina (V) lowland (Slovakia). There are notable differences between these two selected lowlands. Hence, there are also differences in their potential to provide various ESs. Based on a re-evaluation of the present state of the ditches, we evaluated nine ESs related to three main groups of ESs, using the Common International Classification of Ecosystem Services (CICES). We assessed the ESs and benefits provided by ditches and their buffer zone in two ways: (1) ES assessment by experts and (2) biophysical assessment of ESs and their benefits based on an integrated assessment framework (relations between pressures, ecological status, and delivery of ESs). Finally, we compared the potentials for provisioning of the study areas. The study area in the V lowland has the highest potential to provide "Lifecycle maintenance, habitat and gene pool protection" benefits, and the study area in the P lowland has the highest potential to provide "Surface water for non-drinking purposes."