| Popis: |
Pesticides are problematic chemicals that are found in a variety of environments. These substances tend to accumulate in living organisms, where they decomposite very slowly and can have a negative impact on bird populations. This is why some chemicals are still detected in these environments today, even years after their use has been banned, and may continue to affect organisms. The aim of my bachelor thesis was to conduct a literature search on the impact of pesticides on farmland bird populations. The first part of the thesis focuses on pesticides, their history, their division into different systems and their effects. The second part of the thesis then discusses the overall effects of pesticide use on farmland bird populations, particularly on breeding success and abundance. In this part, several studies have been collected that confirm the negative effect of pesticides on bird abundance, but not all of these studies are representative of real situations in the landscape. Finally, the paper assesses the overall role of pesticides in the observed bird declines and also presents suggestions to address the current negative trends. The thesis points to the need for expanded research studies that reflect actual conditions in agricultural landscapes to reveal the true extent of the effects of these... |
