Plant Preference for Ammonium versus Nitrate: A Neglected Determinant of Ecosystem Functioning?

被引：146

作者：

Boudsocq, S. ^{[1
,2
]}

Niboyet, A. ^{[3
]}

Lata, J. C. ^{[4
]}

Raynaud, X. ^{[4
]}

Loeuille, N. ^{[5
,6
]}

Mathieu, J. ^{[4
]}

Blouin, M. ^{[7
]}

Abbadie, L. ^{[4
]}

Barot, S. ^{[8
]}

机构：

[1] ENS, CNRS, Unite Mixte Rech UMR 7618, F-75230 Paris 05, France

[2] INRA, UMR 1222, F-34060 Montpellier 01, France

[3] AgroParisTech, UMR 7618, BioEMCo, F-78850 Thiverval Grignon, France

[4] UPMC, ENS, UMR 7618, BioEMCo, F-75230 Paris 05, France

[5] UPMC, UMR 7625, Lab Ecol Evolut, F-75005 Paris, France

[6] INRA, UMR 2031, F-75005 Paris, France

[7] Univ Paris Est Creteil Val de Marne, UMR 7618, BioEMCo, F-94010 Creteil, France

[8] ENS, UMR 7618, BioEMCo, Inst Rech Dev, F-75230 Paris 05, France

来源：

AMERICAN NATURALIST | 2012年 / 180卷 / 01期

关键词：

ammonium; biological invasion; coexistence; nitrate; nitrification; resource partitioning; NITRIFICATION INHIBITION; NITROGEN ACQUISITION; GRASS; COEXISTENCE; ADAPTATION; CHALLENGES; HYPOTHESIS; SIMILARITY; DIVERSITY; TOXICITY;

D O I：

10.1086/665997

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Although nitrogen (N) availability is a major determinant of ecosystem properties, little is known about the ecological importance of plants' preference for ammonium versus nitrate (beta) for ecosystem functioning and the structure of communities. We modeled this preference for two contrasting ecosystems and showed that beta significantly affects ecosystem properties such as biomass, productivity, and N losses. A particular intermediate value of beta maximizes the primary productivity and minimizes mineral N losses. In addition, contrasting beta values between two plant types allow their coexistence, and the ability of one type to control nitrification modifies the patterns of coexistence with the other. We also show that species replacement dynamics do not lead to the minimization of the total mineral N pool nor the maximization of plant productivity, and consequently do not respect Tilman's R* rule. Our results strongly suggest in the two contrasted ecosystems that beta has important consequences for ecosystem functioning and plant community structure.

引用

页码：60 / 69

页数：10

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