Biome boundary maintained by intense belowground resource competition in world's thinnest-rooted plant community
文献类型：期刊论文
| 作者 | Lu, Mingzhen1,2; Bond, William J.3,4; Sheffer, Efrat5; Cramer, Michael D.3; West, Adam G.3; Allsopp, Nicky4; February, Edmund C.3; Chimphango, Samson3; Ma, Zeqing6; Slingsby, Jasper A.3,4,7 |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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| 出版日期 | 2022-03-01 |
| 卷号 | 119期号:9页码:9 |
| 关键词 | biome boundary resource competition root traits nitrogen trait-by-resource feedback |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.2117514119 |
| 通讯作者 | Lu, Mingzhen(mingzhen.lu89@gmail.com) ; Bond, William J.(william.bond@uct.ac.za) ; Hedin, Lars O.(lhedin@princeton.edu) |
| 英文摘要 | Recent findings point to plant root traits as potentially important for shaping the boundaries of biomes and for maintaining the plant communities within. We examined two hypotheses: 1) Thin-rooted plant strategies might be favored in biomes with low soil resources; and 2) these strategies may act, along with fire, to maintain the sharp boundary between the Fynbos and Afrotemperate Forest biomes in South Africa. These biomes differ in biodiversity, plant traits, and physiognomy, yet exist as alternative stable states on the same geological substrate and in the same climate conditions. We conducted a 4-y field experiment to examine the ability of Forest species to invade the Fynbos as a function of growth-limiting nutrients and belowground plant-plant competition. Our results support both hypotheses: First, we found marked biome differences in root traits, with Fynbos species exhibiting the thin-nest roots reported from any biome worldwide. Second, our field manipulation demonstrated that intense belowground competition inhibits the ability of Forest species to invade Fynbos. Nitrogen was unexpectedly the resource that determined competitive outcome, despite the long-standing expectation that Fynbos is severely phosphorus constrained. These findings identify a trait-by-resource feedback mechanism, in which most species possess adaptive traits that modify soil resources in favor of their own survival while deterring invading species. Our findings challenge the long-held notion that biome boundaries depend primarily on external abiotic constraints and, instead, identify an internal biotic mechanism-a selective feedback among traits, plant-plant competition, and ecosystem conditions-that, along with contrasting fire regime, can act to maintain biome boundaries. |
| WOS关键词 | SAND-PLAIN LOWLAND ; PHOSPHORUS-IMPOVERISHED SOILS ; CAPE FLORISTIC REGION ; MOUNTAIN FYNBOS ; ACQUISITION STRATEGIES ; NUTRIENT ADDITIONS ; LEAF NITROGEN ; FOREST ; FIRE ; VEGETATION |
| 资助项目 | Princeton University ; Princeton Global Collaborative Network Fund ; Andrew W. Mellon Foundation ; Princeton University Petrie Fellowship ; Santa Fe Institute Omidyar Fellowship |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000766928500005 |
| 出版者 | NATL ACAD SCIENCES |
| 资助机构 | Princeton University ; Princeton Global Collaborative Network Fund ; Andrew W. Mellon Foundation ; Princeton University Petrie Fellowship ; Santa Fe Institute Omidyar Fellowship |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/172010]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lu, Mingzhen; Bond, William J.; Hedin, Lars O. |
| 作者单位 | 1.Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA 2.Santa Fe Inst, Santa Fe, NM 87501 USA 3.Univ Cape Town, Dept Biol Sci, ZA-7701 Cape Town, South Africa 4.South African Environm Observat Network, Fynbos Node, ZA-7735 Cape Town, South Africa 5.Hebrew Univ Jerusalem, Robert H Smith Inst Plant Sci & Genet Agr, IL-76100 Rehovot, Israel 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Beijing 100101, Peoples R China 7.Univ Cape Town, Ctr Stat Ecol Environm & Conservat, ZA-7701 Cape Town, South Africa |
| 推荐引用方式 GB/T 7714 | Lu, Mingzhen,Bond, William J.,Sheffer, Efrat,et al. Biome boundary maintained by intense belowground resource competition in world's thinnest-rooted plant community[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2022,119(9):9. |
| APA | Lu, Mingzhen.,Bond, William J..,Sheffer, Efrat.,Cramer, Michael D..,West, Adam G..,...&Hedin, Lars O..(2022).Biome boundary maintained by intense belowground resource competition in world's thinnest-rooted plant community.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,119(9),9. |
| MLA | Lu, Mingzhen,et al."Biome boundary maintained by intense belowground resource competition in world's thinnest-rooted plant community".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 119.9(2022):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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