13 research outputs found
Can riparian vegetation shade mitigate the expected rise in stream temperatures due to climate change during heat waves in a human-impacted pre-alpine river?
Global warming has already affected European rivers and their
aquatic biota, and climate models predict an increase of temperature in
central Europe over all seasons. We simulated the influence of expected
changes in heat wave intensity during the 21st century on water temperatures
of a heavily impacted pre-alpine Austrian river and analysed future
mitigating effects of riparian vegetation shade on radiant and turbulent
energy fluxes using the deterministic Heat Source model. Modelled
stream water temperature increased less than 1.5 °C within the first
half of the century. Until 2100, a more significant increase of around
3 °C in minimum, maximum and mean stream temperatures was predicted
for a 20-year return period heat event. The result showed clearly that in a
highly altered river system riparian vegetation was not able to fully
mitigate the predicted temperature rise caused by climate change but would
be able to reduce water temperature by 1 to 2 °C. The removal of
riparian vegetation amplified stream temperature increases. Maximum stream
temperatures could increase by more than 4 °C even in annual heat
events. Such a dramatic water temperature shift of some degrees, especially
in summer, would indicate a total shift of aquatic biodiversity. The results
demonstrate that effective river restoration and mitigation require
re-establishing riparian vegetation and emphasize the importance of
land–water interfaces and their ecological functioning in aquatic
environments
Up-regulation of 12(S)-lipoxygenase induces a migratory phenotype in colorectal cancer cells
12(S)-Lipoxygenase (LOX) and its product 12(S)-hydroxyeicosatetraenic (HETE) acid have been implicated in angiogenesis and tumour invasion in several tumour types while their role in colorectal cancer progression has not yet been studied. We have analysed 12(S)-LOX expression in colorectal tumours and found gene expression up-regulated in colorectal cancer specimens for which the pathology report described involvement of inflammation