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Article

The Dynamics of Living and Dead Fine Roots of Forest Biomes across the Northern Hemisphere

1
Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, Northeast Normal University, Changchun 130024, China
2
Swiss Federal Research Institute WSL, Zuercherstrasse 111, CH-8903 Birmensdorf, Switzerland
*
Author to whom correspondence should be addressed.
Forests 2019, 10(11), 953; https://doi.org/10.3390/f10110953
Received: 25 August 2019 / Revised: 23 October 2019 / Accepted: 24 October 2019 / Published: 25 October 2019
(This article belongs to the Special Issue Fine Root Dynamics in Forests)
Research Highlights: A detailed picture of the seasonality in fine root biomass (FRB), necromass (FRN), and the biomass/necromass ratio (FRBN) throughout the whole year is crucial to uncover profound effects of long-term environmental changes on fine root dynamics. Materials and Methods: We used meta-analysis to characterize the variability of FRB, FRN and FRBN, and determined their relations with climatic (monthly versus annual), edaphic and geomorphic factors for tropical, temperate and boreal forest biomes across the Northern Hemisphere. Results: Boreal forests exhibited the highest FRB and FRN, while tropical forests yielded the lowest FRN, and thus the greatest FRBN. FRB and FRN significantly decreased with sampling depth, but increased with soil organic carbon content and elevation, while an opposite pattern was found for FRBN. Temperature and precipitation at different time scales (monthly versus annual) and latitude had varying influences on fine roots. High FRB and FRN were observed during dry season for tropical forests, but in the late growing season for temperate forests. The three forest biomes exhibited the high root activity (measured as FRBN) in June or July. Conclusions: It is crucial to realize the universal and specific responses of fine roots to multiple environmental factors when attempting to incorporate these parameters into fine root monthly dynamic models in forest ecosystems. The biome-specific fluctuation of fine roots contributes to identify the influence factors on fine root seasonal patterns throughout the whole year. Our analysis is expected to improve the understanding of the key role of fine roots at monthly level in modeling and predicting carbon budget of various forest biomes under future climate change. View Full-Text
Keywords: fine root biomass; fine root necromass; forest biome; monthly; precipitation; seasonal dynamics; temperature fine root biomass; fine root necromass; forest biome; monthly; precipitation; seasonal dynamics; temperature
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MDPI and ACS Style

Wang, C.; Brunner, I.; Zong, S.; Li, M.-H. The Dynamics of Living and Dead Fine Roots of Forest Biomes across the Northern Hemisphere. Forests 2019, 10, 953. https://doi.org/10.3390/f10110953

AMA Style

Wang C, Brunner I, Zong S, Li M-H. The Dynamics of Living and Dead Fine Roots of Forest Biomes across the Northern Hemisphere. Forests. 2019; 10(11):953. https://doi.org/10.3390/f10110953

Chicago/Turabian Style

Wang, Cunguo; Brunner, Ivano; Zong, Shengwei; Li, Mai-He. 2019. "The Dynamics of Living and Dead Fine Roots of Forest Biomes across the Northern Hemisphere" Forests 10, no. 11: 953. https://doi.org/10.3390/f10110953

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