More salt, please: global patterns, responses and impacts of foliar sodium in grasslands

被引：43

作者：

Borer, E. T. ^{[1
]}

Lind, E. M. ^{[1
]}

Firn, J. ^{[2
]}

Seabloom, E. W. ^{[1
]}

Anderson, T. M. ^{[3
]}

Bakker, E. S. ^{[4
]}

Biederman, L. ^{[5
]}

La Pierre, K. J. ^{[6
]}

MacDougall, A. S. ^{[7
]}

Moore, J. L. ^{[8
]}

Risch, A. C. ^{[9
]}

Schutz, M. ^{[9
]}

Stevens, C. J. ^{[10
]}

机构：

[1] Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA

[2] Queensland Univ Technol, Sch Earth Environm & Biol Sci, Sci & Engn Fac, Brisbane, Qld 4001, Australia

[3] Wake Forest Univ, Dept Biol, 049 Winston Hall, Winston Salem, NC 27109 USA

[4] Netherlands Inst Ecol NIOO KNAW, Dept Aquat Ecol, Droevendaalsesteeg 10, NL-6708 PB Wageningen, Netherlands

[5] Iowa State Univ, Dept Ecol Evolut & Organismal Biol, 251 Bessey Hall, Ames, IA 50010 USA

[6] Smithsonian Environm Res Ctr, 647 Contees Wharf Rd, Edgewater, MD 21037 USA

[7] Univ Guelph, Dept Integrat Biol, Guelph, ON N1G 2W1, Canada

[8] Monash Univ, Sch Biol Sci, Clayton, Vic 3800, Australia

[9] Swiss Fed Inst Forest Snow & Landscape Res, Zuercherstr 11, CH-8903 Birmensdorf, Switzerland

[10] Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England

来源：

ECOLOGY LETTERS | 2019年 / 22卷 / 07期

基金：

美国国家科学基金会;

关键词：

Biogeography; herbivory; nitrogen; phosphorus; potassium; micronutrients; Nutrient Network (NutNet); plant taxonomy; BASE CATIONS; SELECTION; NITROGEN; PLANTS; ECOSYSTEMS; MECHANISMS; HERBIVORES; POTASSIUM; BALANCE; PH;

D O I：

10.1111/ele.13270

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Sodium is unique among abundant elemental nutrients, because most plant species do not require it for growth or development, whereas animals physiologically require sodium. Foliar sodium influences consumption rates by animals and can structure herbivores across landscapes. We quantified foliar sodium in 201 locally abundant, herbaceous species representing 32 families and, at 26 sites on four continents, experimentally manipulated vertebrate herbivores and elemental nutrients to determine their effect on foliar sodium. Foliar sodium varied taxonomically and geographically, spanning five orders of magnitude. Site-level foliar sodium increased most strongly with site aridity and soil sodium; nutrient addition weakened the relationship between aridity and mean foliar sodium. Within sites, high sodium plants declined in abundance with fertilisation, whereas low sodium plants increased. Herbivory provided an explanation: herbivores selectively reduced high nutrient, high sodium plants. Thus, interactions among climate, nutrients and the resulting nutritional value for herbivores determine foliar sodium biogeography in herbaceous-dominated systems.

引用

页码：1136 / 1144

页数：9

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