Biome-specific effects of nitrogen and phosphorus on the photosynthetic characteristics of trees at a forest-savanna boundary in Cameroon.
Biome-specific effects of nitrogen and phosphorus on the photosynthetic characteristics of trees at a forest-savanna boundary in Cameroon.
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DOI：
10.1007/s00442-015-3250-5
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发表时间：
2015-07
期刊：
影响因子：
2.7
通讯作者：
Lloyd, Jon
中科院分区：
文献类型：
--
作者：
Domingues, Tomas Ferreira;Ishida, F. Yoko;Feldpausch, Ted R.;Grace, John;Meir, Patrick;Saiz, Gustavo;Sene, Olivier;Schrodt, Franziska;Sonke, Bonaventure;Taedoumg, Herman;Veenendaal, Elmar M.;Lewis, Simon;Lloyd, Jon
在喀麦隆（非洲）的一个生态交错区测定了近缘生长的森林和稀树草原树木的光合作用/养分关系。虽然面积为基础的叶片氮浓度通常较低的稀树草原树木，有两种植被形成类型之间的光合速率没有差异。相反的N，基于区域的P浓度平均略低的森林树木，叶片P的光合特性的依赖性是唯一明显的稀树草原树木。因此，热带稀树草原树木比森林树木更有效地利用氮，但只有在存在相对较高的叶面P.沿着与其他一些最近的研究，这些结果表明，N和P是重要的调制器木本热带植物光合能力，影响光合代谢的不同方式，也是生物群落的具体。试图找到简单的统一方程来描述木本热带植被光合作用-养分关系可能会失败，森林和稀树草原之间的生理生态差异需要承认。本文的在线版本（doi：10.1007/s 00442 -015-3250-5）包含补充材料，可供授权用户使用。
Photosynthesis/nutrient relationships of proximally growing forest and savanna trees were determined in an ecotonal region of Cameroon (Africa). Although area-based foliar N concentrations were typically lower for savanna trees, there was no difference in photosynthetic rates between the two vegetation formation types. Opposite to N, area-based P concentrations were—on average—slightly lower for forest trees; a dependency of photosynthetic characteristics on foliar P was only evident for savanna trees. Thus savanna trees use N more efficiently than their forest counterparts, but only in the presence of relatively high foliar P. Along with some other recent studies, these results suggest that both N and P are important modulators of woody tropical plant photosynthetic capacities, influencing photosynthetic metabolism in different ways that are also biome specific. Attempts to find simple unifying equations to describe woody tropical vegetation photosynthesis-nutrient relationships are likely to meet with failure, with ecophysiological distinctions between forest and savanna requiring acknowledgement. The online version of this article (doi:10.1007/s00442-015-3250-5) contains supplementary material, which is available to authorized users.
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影响因子：
7.3
作者：
LLOYD, J;KRIEDEMANN, PE;ASPINALL, D
通讯作者：
ASPINALL, D
影响因子：
9.4
作者：
Lambers, Hans;Cawthray, Gregory R.;Turner, Benjamin L.
通讯作者：
Turner, Benjamin L.
影响因子：
9.4
作者：
Niinemets, U
通讯作者：
Niinemets, U
DOI：
10.1002/joc.1276
发表时间：
2005-12-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Hijmans, RJ;Cameron, SE;Jarvis, A
通讯作者：
Jarvis, A
影响因子：
7.3
作者：
Bernacchi, CJ;Singsaas, EL;Long, SP
通讯作者：
Long, SP