Warming creates a phenological mismatch in conifers .Warming creates a phenological mismatch in conifers because the carbon sources (photosynthesis) advance faster than the carbon sinks (wood growth). While photosynthesis begins earlier in warmer springs, stem growth (the sink for this carbon) is slower to reactivate, leading to a period where the tree is photosynthesizing more than it can use for growth. This mismatch is further amplified because photosynthesis can continue longer into the autumn, lengthening the season more than woody growth.

Warming creates a phenological mismatch in conifers .Warming creates a phenological mismatch in conifers because the carbon sources (photosynthesis) advance faster than the carbon sinks (wood growth). While photosynthesis begins earlier in warmer springs, stem growth (the sink for this carbon) is slower to reactivate, leading to a period where the tree is photosynthesizing more than it can use for growth. This mismatch is further amplified because photosynthesis can continue longer into the autumn, lengthening the season more than woody growth. 
Carbon sources (photosynthesis) advance faster: -
Photosynthesis begins earlier with warmer spring temperatures.
Carbon sinks (wood growth) advance slower: Stem and xylem growth lag behind, starting 2.3 days later per degree of warming, which is about half as fast as photosynthesis.
Photosynthetic season lengthens more:- The period where photosynthesis occurs can lengthen by a month more than the growing season in warmer areas.
Result: This causes a disconnect where the tree captures more carbon than it can use to build new wood, potentially creating a bottleneck for growth during the season. 
Warming increases the phenological mismatch between carbon sources ...
ResearchGate
 begins earlier in warmer springs, stem growth (the sink for this carbon) is slower to reactivate, leading to a period where the tree is photosynthesizing more than it can use for growth. This mismatch is further amplified because photosynthesis can continue longer into the autumn, lengthening the season more than woody growth.                       Carbon sources (photosynthesis) advance faster:-
 Photosynthesis begins earlier with warmer spring temperatures.
  Carbon sinks (wood growth) advance slower: -
Stem and xylem growth lag behind, starting 2.3 days later per degree of warming, which is about half as fast as photosynthesis.
  • Photosynthetic season lengthens more: -The period where photosynthesis occurs can lengthen by a month more than the growing season in warmer areas.
  • Result: This causes a disconnect where the tree captures more carbon than it can use to build new wood, potentially creating a bottleneck for growth during the season. 
MJF Lion ER YK 

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