Since plants shed their leaves and don't perform photosynthesis during winters, where does oxygen come from?


closed as off-topic by anongoodnurse, another 'Homo sapien', theforestecologist, Satwik Pasani, March Ho May 15 '17 at 2:30

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Homework questions are off-topic on Biology unless you have shown your attempt at an answer. For more information see our homework policy." – anongoodnurse, another 'Homo sapien', theforestecologist, Satwik Pasani, March Ho
If this question can be reworded to fit the rules in the help center, please edit the question.

  • 5
    $\begingroup$ 1-There is a lot of oxygen. Certainly enough to last the winter. 2- Equatorial rainforests don't lose their leaves as the seasons are less severe. 3- The Taiga forest in Russia and the Boreal forest of Canada have evergreens which also do not lose their leaves. $\endgroup$ – James Apr 20 '17 at 8:25
  • 6
    $\begingroup$ 4 - Generally "winter" is not "winter" at the same time everywhere on the world. $\endgroup$ – skymningen Apr 20 '17 at 8:51
  • 2
    $\begingroup$ Oceans are the largest producer of oxygen $\endgroup$ – AliceD Apr 20 '17 at 13:23
  • $\begingroup$ As others have pointed out, it's not winter everywhere at the same time, and there's a lot more oxygen than would be used up in one winter. However, if you look up "Keeling Curve", you can see the annual variation in CO2 (and hence O2, inversely) due to winter in the northern hemisphere. It seems to be on the order of 6 ppm. $\endgroup$ – jamesqf Apr 20 '17 at 19:32
  • $\begingroup$ These all look like answers to the question. $\endgroup$ – canadianer Apr 21 '17 at 2:35