Variable tree rooting strategies are key for modelling the distribution, productivity and evapotranspiration of tropical evergreen forests
Variable tree rooting strategies are key for modelling the distribution, productivity and evapotranspiration of tropical evergreen forests
复制标题
可变的树木生根策略是模拟热带常绿森林的分布、生产力和蒸散量的关键
作者：
B. Sakschewski;Werner von Bloh;Markus Drüke;A. Sörensson;R. Ruscica;F. Langerwisch;Maik Billing;S. Bereswill;M. Hirota;R. Oliveira;J. Heinke;K. Thonicke
抽象的。各种各样的模型研究表明，
作为一个关键变量来解释蒸散率，生产力和
南美洲热带万年青森林的地理分布。
然而，这些研究都没有承认资源投资、时间安排和
在竞争环境中，树木生根深度的物理限制，
破坏了其结果的生态现实主义。在这里，我们提出了一个
实施可变生根策略和动态根系生长的方法
LPJmL4.0（Lund-Potsdam-Jena managed Land）全球植被动态模式（DGVM），并将其应用于热带和亚热带地区
在现代气候条件下的南美洲。我们展示了竞争是如何
生根战略，基础之间的权衡以上和
地下碳投资导致更现实的模拟，
年内生产力和蒸散量，
森林覆盖和生物量空间分布。我们发现气候和土壤
深度决定了平均生根深度的空间异质模式，
地下生物量在整个研究区域。我们的研究结果支持这一
一种假设，即万年青树木调节其生根的能力，
季节性干燥气候的系统是解释当前的关键
优势度、生产力和蒸散量
热带南美洲。
Abstract. A variety of modelling studies have suggested tree rooting depth
as a key variable to explain evapotranspiration rates, productivity and the
geographical distribution of evergreen forests in tropical South America.
However, none of those studies have acknowledged resource investment, timing and
physical constraints of tree rooting depth within a competitive environment,
undermining the ecological realism of their results. Here, we present an
approach of implementing variable rooting strategies and dynamic root growth
into the LPJmL4.0 (Lund-Potsdam-Jena managed Land) dynamic global vegetation model (DGVM) and apply it to tropical and sub-tropical
South America under contemporary climate conditions. We show how competing
rooting strategies which underlie the trade-off between above- and
below-ground carbon investment lead to more realistic simulation of
intra-annual productivity and evapotranspiration and consequently of
forest cover and spatial biomass distribution. We find that climate and soil
depth determine a spatially heterogeneous pattern of mean rooting depth and
below-ground biomass across the study region. Our findings support the
hypothesis that the ability of evergreen trees to adjust their rooting
systems to seasonally dry climates is crucial to explaining the current
dominance, productivity and evapotranspiration of evergreen forests in
tropical South America.
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影响因子：
5.2
作者：
Aragao, Luiz Eduardo O. C.;Malhi, Yadvinder;Shimabukuro, Yosio Edemir
通讯作者：
Shimabukuro, Yosio Edemir
气候生物群落、土壤生物群落或火热生物群落：哪种世界观解释了南美洲的热带森林稀树草原边界？
影响因子：
3.9
作者：
Langan;Higgins;Scheiter
通讯作者：
Scheiter
影响因子：
18.3
作者：
Ciemer, Catrin;Boers, Niklas;Winkelmann, Ricarda
通讯作者：
Winkelmann, Ricarda
影响因子：
6.3
作者：
Balsamo, G.;Albergel, C.;Vitart, F.
通讯作者：
Vitart, F.