Extreme weather: does nature keep up?: observed responses of species and ecosystems to changes in climate and extreme weather events: many more reasons for concern

Abstract

Plants, birds, insects, mammals, amphibians and fishes are rapidly responding to the observed changes in climate everywhere on the planet. Extreme high temperatures immediately result in hefty responses. The responses, however, significantly differ from species to species and from year to year, which complicates a clear attribution of causes. The ecological impacts are nowadays visible everywhere through changes in the timing of life cycle events and the geographic distributions of species. Plants have advanced flowering by up to 30 days and are now doing so at dates never documented in the last two centuries. Some species show a dramatic increase in range area, disrupting ecosystems like, for example, the rapid spread over millions of hectares of the Mountain Pine Beetle in North America and the northward expansion of the Oak Processionary caterpillar in The Netherlands. Also fires have increased catastrophically in tropical wet forests during the severe droughts of the El Niño years in the nineties. Other species show a dramatic decrease in distribution or population sizes, illustrated by bleaching corals and disappearing amphibians worldwide. Warm winters, hot summers, excessive precipitation and extended droughts are weather events that trigger these responses