Trees become more sensitive to cold due to global warming

Global warming seriously affects both the state of the climate and plants. Some of such examples are -

abnormally fast onset of spring. As a result, birds return from the south to the circumpolar regions several weeks earlier. Therefore, the balance between predators and their rodent prey has shifted.

Scientists have found another negative effect of earlyspring - in the course of their work, they studied how, from the middle of the 20th century to the present, global warming has changed the flowering process, as well as the timing of the appearance of the first leaves in several tree species - ash, alder and horse chestnut.

It is noted that usually all these trees bloom indifferent time. However, the increase in average annual temperatures affected their bloom. Therefore, ash and alder began to bloom a few days earlier than in the middle of the 20th century. However, this had almost no effect on the time of appearance of their leaves, and vice versa - the leaves of the horse chestnut began to appear much earlier, and the flowering time almost did not change.

It turned out that the period of time thatoccurs between flowering and emergence of leaves, for every 10 years it increased by about 0.6-1.3 days. Because of this, the plants have become more vulnerable to frost.

This feature negatively affects the reproduction of trees, as well as the set of biomass. Scientists continue to monitor trees to understand how critical these changes are.

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