Scientists studied the vernal window — transition period from winter to the growing season. They found that warmer winters with less snow resulted in a longer lag time between spring events and a more protracted vernal window. This change in the spring timetable has ecological, social and economic consequences — for agriculture, fisheries and tourism. As the ice melts earlier, the birds don't return, causing a delay, or lengthening in springtime ecological events.
With reference to the above passage, the following assumptions have been made :
- Global warming is causing spring to come early and for longer durations.
- Early spring and longer period of spring is not good for bird populations.
Which of the above assumptions is/are correct ?
With reference to the above passage, the following assumptions have been made :
- Global warming is causing spring to come early and for longer durations.
- Early spring and longer period of spring is not good for bird populations.
Which of the above assumptions is/are correct ?