Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13410 |
Tree demography dominates long-term growth trends inferred from tree rings | |
Brienen, Roel J. W.; Gloor, Manuel; Ziv, Guy | |
2017-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Understanding responses of forests to increasing CO2 and temperature is an important challenge, but no easy task. Tree rings are increasingly used to study such responses. In a recent study, van der Sleen etal. (2014) Nature Geoscience, 8, 4 used tree rings from 12 tropical tree species and find that despite increases in intrinsic water use efficiency, no growth stimulation is observed. This challenges the idea that increasing CO2 would stimulate growth. Unfortunately, tree ring analysis can be plagued by biases, resulting in spurious growth trends. While their study evaluated several biases, it does not account for all. In particular, one bias may have seriously affected their results. Several of the species have recruitment patterns, which are not uniform, but clustered around one specific year. This results in spurious negative growth trends if growth rates are calculated in fixed size classes, as fast-growing' trees reach the sampling diameter earlier compared to slow growers and thus fast growth rates tend to have earlier calendar dates. We assessed the effect of this nonuniform age bias' on observed growth trends and find that van der Sleen's conclusions of a lack of growth stimulation do not hold. Growth trends are - at least partially - driven by underlying recruitment or age distributions. Species with more clustered age distributions show more negative growth trends, and simulations to estimate the effect of species' age distributions show growth trends close to those observed. Re-evaluation of the growth data and correction for the bias result in significant positive growth trends of 1-2% per decade for the full period, and 3-7% since 1950. These observations, however, should be taken cautiously as multiple biases affect these trend estimates. In all, our results highlight that tree ring studies of long-term growth trends can be strongly influenced by biases if demographic processes are not carefully accounted for. |
英文关键词 | climate change CO2 fertilization dendrochronology growth stimulation population dynamics sample bias tropical forests |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394343300004 |
WOS关键词 | TROPICAL FORESTS ; CARBON SINK ; RATES ; SENSITIVITY ; PATTERNS ; DECLINE ; CYCLE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17654 |
专题 | 气候变化 资源环境科学 |
作者单位 | Univ Leeds, Sch Geog, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England |
推荐引用方式 GB/T 7714 | Brienen, Roel J. W.,Gloor, Manuel,Ziv, Guy. Tree demography dominates long-term growth trends inferred from tree rings[J]. GLOBAL CHANGE BIOLOGY,2017,23(2). |
APA | Brienen, Roel J. W.,Gloor, Manuel,&Ziv, Guy.(2017).Tree demography dominates long-term growth trends inferred from tree rings.GLOBAL CHANGE BIOLOGY,23(2). |
MLA | Brienen, Roel J. W.,et al."Tree demography dominates long-term growth trends inferred from tree rings".GLOBAL CHANGE BIOLOGY 23.2(2017). |
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