Which of the following mechanisms correctly describes the relationship between climate and tree growth on Isle Royale, as described in the lecture?

Question

17-07-2025
Biology

High School

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Which of the following mechanisms correctly describes the relationship between climate and tree growth on Isle Royale, as described in the lecture?

Answer :

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poonamyadav poonamyadav · Answer 1 · 2024-02-23T06:14:35-05:00

Final answer:

Both temperature and precipitation influence Picea distribution, but temperature seems to be the primary driver due to its role in affecting growth rates, phenology, and energy balance within forest ecosystems.

Explanation:

The question asks which climate parameter, temperature or precipitation, is driving the distribution of Picea through time. From the information provided, it seems that both temperature increases and changes in precipitation patterns due to rising atmospheric carbon dioxide might be influencing tree growth.

As temperatures rise, tree growth may initially increase, but this can be negated by higher respiration rates, especially during periods of drought where water stress can lead to negative feedback mechanisms in forests. This is further complicated by occurrences such as stronger tropical storms due to warmer ocean surface temperatures, which can cause direct physical damage to trees and affect their survival and distribution.

Furthermore, abiotic factors such as temperature and precipitation are reported to play critical roles in the phenology and distribution of plants, with examples of plants flowering earlier due to temperature changes being noted. Given this, the impact of temperature on phenology could suggest that climate warming has a significant impact on tree growth.