Ponds and their catchments: size relationships and influence of land use across multiple spatial scales
The information on both the catchment land use and catchment area has the potential to be adopted into the conservation and management of ponds. There have been, however, few attempts to describe the effects of land use acting at various spatial scales on ponds and the studies were restricted to specific categories of ponds. This paper presents a study on 92 ponds distributed over a broad range of environmental conditions in Central Europe. We combined an extensive field survey and a detailed analysis of sediment and water chemistry with GIS-derived data to estimate the relationship between the area of the ponds and the area of their catchments, and to assess the relationship between pond physico-chemical conditions and land use across multiple spatial scales. Relating the area of ponds to the area of their catchments, we found a significant positive relationship (r = 0.72). Considering land use effects on pond conditions, catchment-scale land use was the only significant spatial extent influencing the physico-chemical conditions. Most notably, the proportion of intensively exploited land (arable land, urban areas) in the catchment scale was positively correlated with the deterioration of pond physico-chemical properties. The results of the study suggest that effective conservation of ponds cannot be achieved merely through the management of narrow buffer zones around them but should involve maintenance of less intensive land use within the whole catchment. Moreover, easily accessible catchment-scale GIS data could serve as a decision-support tool for cost-effective management strategies aimed at improving pond physico-chemical conditions.
KeywordsLandscape management Water chemistry Biodiversity conservation Buffer zones
This work was supported by the Slovak Research and Development Agency under the contract No. APVV-0059-11. We thank Miro Očadlík, Zuzka Matúšová, and Barbora Reduciendo Klementová for their tireless field efforts and Dušan Senko for providing the climate data. We are grateful to the guest editors of the special issue and the two anonymous referees whose suggestions resulted in an improved manuscript.
Compliance with ethical standards
Authors declare that manuscript complies with the Ethical Standards applicable for Hydrobiologia journal.
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