Monitoring biogeographical response to climate change: The potential role of aeropalynology

摘要: To test models predicting biological reponse to future climate change, it is essential find climatically-sensitive, easily monitored indicators that respond change. Routine monitoring of airborne pollen, now undertaken on a near-global basis, could be adapted for this purpose. Analysis spatial and seasonal variations in pollen levels New Zealand suggests the timing onset peak abundance certain taxa should explored as possible bio-indicators The grass season during summer 1988/89 varied consistently with latitude, hence temperature, Southland commencing 8--9 days after Northland. However, these patterns were only apparent sampling sites separated into two groups reflecting predominantly urban or rural sources. A less consistent north south trend was frequency high (30 grains/m3) levels, frequent North Island localities November, December January southern January. successive seasons principal tree species spring-to-early warming interval may also useful bio-indicator As well assisting forecasts pollinosis season, biogeographical patterns, climatic variation suggest routine aeropalynological might provide early signals vegetation response These conclusions are supported by recent investigations long-term datasets Europe indicate earlier global warming.