ANALYZING THE PHYSICAL AND CHEMICAL CONTRIBUTIONS OF THE DIMINISHING PELOBATES FUSCUS AQUATIC HABITAT IN KYNDELØSE, LEJRE

Iben Dehn Sørensen & Millicent Obiribea

Studenteropgave: Bachelorprojekt

Abstrakt

Habitat loss and degradation are the most obvious and acute factors which influence amphibian decline. The common spadefoot toad (Pelobates fuscus) is considered a typical representative of herpetofauna in open agricultural landscapes, which is widely spread across most of Europe. However, its Northern distribution zones (Denmark, Estonia and Sweden) has experienced a decline in the population of these species. Kyndeløse-Nørre Hyllinge area, in northern Lejre is one of such areas in Denmark that has suffered such decline for the past years. This study therefore focuses on finding certain environmental conditions that optimizes the survival of the P. fuscus in the Kyndeløse-Lyre community. To attempt this, the physical- (shade, buffer and vegetation, predators, soil type and the hydrology) and chemical parameters (nutrients and pesticides load) reproductive habitat of these toad were studied. This was achieved through fieldwork and laboratory work. Our study revealed that the ponds in which P. fuscus uses as reproductive habitat were eutrophic, yet it has no effect on the presence of the toad. The presence of pesticides was also analyzed but there was no indication of pesticides. This could be further analyzed. Our study also pointed out that shade was the only physical indicator that could indicate to have influenced the absence of the P. fuscus species.

UddannelserBasis - Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Bachelor
SprogEngelsk
Udgivelsesdato30 maj 2016
Antal sider40
VejledereNiels H. Jensen