PLANT-SOIL WATER RELATIONS AND SPECIES BORDER OF CLARKIA XANTIANA SSP. XANTIANA (ONAGRACEAE)

Vincent M. Eckhart; Indrani Singh; Allison M. Louthan; Amanda J. Keledjian; Anna Chu; David A. Moeller; Monica A. Gebert

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PLANT-SOIL WATER RELATIONS AND SPECIES BORDER OF CLARKIA XANTIANA SSP. XANTIANA (ONAGRACEAE)

机译：克拉科尼亚黄花菜属植物的植物-土壤水关系和物种边界。 XANTIANA（ONAGRACEAE）

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摘要

Low precipitation can limit plant distributions. Soil variation might interact with precipitation gradients to define species borders. Analyzing the eastern species border of the California annual Clarkia xantiana ssp. xantiana, we assessed the following: (1) the geography of plant water status, precipitation, and soil; (2) soil control of plant water status; and (3) water status control of plant performance. Plant water potential declined toward the border in consecutive years. Precipitation declined in parallel and was lower in the year of lower water potential. Many border soils are derived from metasedimentary rock, while igneous rock dominates the species range to the west and unoccupied areas to the east. Compared with igneous soils, metasedimentary soils were found to have greater penetration resistance and finer texture, and they exhibited greater water storage capacity but also stronger restrictions on water release. Within populations, plant water status was inferior on shallow slopes with hard, fine soils. Among populations, plant size and fruit production increased with water potential, though seedling-to-adult mortality was independent. Low precipitation and an abrupt change in bedrock likely contribute to the species border of C. xantiana ssp. xantiana. Understanding adaptation and distribution shifts under climate change requires a consideration of both climate and soils.

机译：降水不足会限制植物的分布。土壤变化可能与降水梯度相互作用以定义物种边界。分析加利福尼亚州一年生的克拉克黄原菌属的东部物种边界。在Xantiana，我们评估了以下内容：（1）植物水分状况，降水和土壤的地理位置；（2）土壤控制植物水分状况；（3）控制工厂性能的水状态。植物水势连续几年下降到边境。降水量平行下降，而水势较低的年份降水量减少。许多边界土壤均来自沉积沉积岩，而火成岩则占西部的物种范围，而东部则是无人居住的区域。与火成土相比，沉积沉积土具有更高的抗渗透性和更细的质地，它们具有更大的储水能力，但对水的释放的限制也更强。在种群内，在土壤较硬，较薄的浅坡上，植物的水分状况较差。在种群中，植物的大小和果实的产量随着水的潜力而增加，尽管幼苗到成年的死亡率是独立的。低降水量和基岩的突然变化可能是造成黄花果树种边界的原因。 Xantiana。了解气候变化下的适应和分布变化需要同时考虑气候和土壤。

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来源
《International journal of plant sciences》 |2010年第7期|P.749-760|共12页
作者
Vincent M. Eckhart; Indrani Singh; Allison M. Louthan; Amanda J. Keledjian; Anna Chu; David A. Moeller; Monica A. Gebert;
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作者单位

Department of Biology, Grinnell College, Crinnell, lowa 50112, U.S.A.;

rnDepartment of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, U.S.A.;

rnDepartment of Zoology and Physiology, University of Wyoming, Laramie, Wyoming 82071, U.S.A.;

rnCenter for Marine Biodiversity and Conservation, University of California-San Diego, La Jolla, California 92093, U.S.A.;

rnSchool of Education and Social Policy, Northwestern University, Evanston, Illinois 60208, U.S.A.;

rnDepartment of Plant Biology, University of Minnesota, 1445 Gartner Avenue, Saint Paul, Minnesota 55108, U.S.A.;

rnDepartment of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, U.S.A.;

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原文格式 PDF
正文语种 eng
中图分类
关键词
plant water relations; species borders; Clarkia xantiana; soil texture; soil penetration resistance; demography;

机译：植物水关系;物种边界黄萎病土壤质地耐土壤渗透性人口统计学;
入库时间 2022-08-18 03:45:40

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PLANT-SOIL WATER RELATIONS AND SPECIES BORDER OF CLARKIA XANTIANA SSP. XANTIANA (ONAGRACEAE)

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