Intraspecific variability in growth response to environmental fluctuations modulates the stabilizing effect of species diversity on forest growth

被引:40
作者
Aussenac, Raphael [1 ]
Bergeron, Yves [1 ]
Mekontchou, Claudele Ghotsa [1 ]
Gravel, Dominique [2 ]
Pilch, Kamil [3 ]
Drobyshev, Igor [1 ,4 ]
机构
[1] UQAT, Inst Rech Forets, Chaire Ind CRSNG UQAT UQAM Amenagement Forestier, 445 Boul Univ, Rouyn Noranda, PQ J9X 5E4, Canada
[2] Univ Sherbrooke, Fac Sci, Dept Biol, Chaire Rech Ecol Integrat, 2500 Blvd Univ, Sherbrooke, PQ J1K 2R1, Canada
[3] Univ Rzeszow, Fac Biol & Agr, Agroecol Dept, Ul Cwiklinskiej 1A, PL-35601 Rzeszow, Poland
[4] Swedish Univ Agr Sci, Southern Swedish Forest Res Ctr, POB 49, S-23053 Alnarp, Sweden
基金
加拿大自然科学与工程研究理事会;
关键词
biodiversity; dendrochronology; growth asynchrony; plant population and community dynamics; plant-climate interactions; plant-herbivore interactions; plant-plant interactions; tree growth; ECOSYSTEM STABILITY; TEMPORAL STABILITY; BIODIVERSITY LOSS; TREE DIVERSITY; PRODUCTIVITY; PATTERNS; SPRUCE; TEMPERATURE; SIMULATION; RESISTANCE;
D O I
10.1111/1365-2745.12728
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
1. Differences between species in their response to environmental fluctuations cause asynchronized growth series, suggesting that species diversity may help communities buffer the effects of environmental fluctuations. However, within-species variability of responses may impact the stabilizing effect of growth asynchrony. 2. We used tree ring data to investigate the diversity-stability relationship and its underlying mechanisms within the temperate and boreal mixed woods of Eastern Canada. We worked at the individual tree level to take into account the intraspecific variability of responses to environmental fluctuations. 3. We found that species diversity stabilized growth in forest ecosystems. The asynchrony of species' response to climatic fluctuations and to insect outbreaks explained this effect. We also found that the intraspecific variability of responses to environmental fluctuations was high, making the stabilizing effect of diversity highly variable. 4. Synthesis. Our results are consistent with previous studies suggesting that the asynchrony of species' response to environmental fluctuations drives the stabilizing effect of diversity. The intraspecific variability of these responses modulates the stabilizing effect of species diversity. Interactions between individuals, variation in tree size and spatial heterogeneity of environmental conditions could play a critical role in the stabilizing effect of diversity.
引用
收藏
页码:1010 / 1020
页数:11
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