Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH
1 Species diversity in the Arctic varies dramatically across abiotic gradients, includ-ing topography, moisture, pH and nutrient availability. We hypothesized that vas-cular plant species density, richness and diversity in Alaskan tundra would be correlated with: (i) site age, (ii) soil pH, (iii) ab...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.554.8088 2023-05-15T14:54:12+02:00 Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH Laura Gough Gaius R. Shaver Jenny Carroll Dana L. Royer James A. Laundre The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.8088 http://droyer.web.wesleyan.edu/Toolik.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.8088 http://droyer.web.wesleyan.edu/Toolik.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://droyer.web.wesleyan.edu/Toolik.pdf biomass landscape age spatial heterogeneity species density species diversity text 2000 ftciteseerx 2016-01-08T11:43:44Z 1 Species diversity in the Arctic varies dramatically across abiotic gradients, includ-ing topography, moisture, pH and nutrient availability. We hypothesized that vas-cular plant species density, richness and diversity in Alaskan tundra would be correlated with: (i) site age, (ii) soil pH, (iii) above-ground productivity and bio-mass, and (iv) spatial heterogeneity. We sampled moist tussock, snowbed and watertrack communities in three sites that diered in substrate age (11 000–4.5 mil-lion years since deglaciation) for a variety of environmental and vegetation data over one growing season. 2 Productivity, biomass and heterogeneity were not consistently correlated with species density. However, variation in canopy height was correlated with species density and richness in a unimodal fashion, suggesting that heterogeneity of the light regime may be important for maintaining higher species numbers. 3 The 11 000-year-old site supported more vascular plant species than the two older sites, primarily due to greater numbers of forb species on the youngest site. 4 Soil pH was significantly positively correlated with species richness (R2=0.82) and species density (R2=0.61). In general the species found on acidic substrates (pH<5.5) also occurred on non-acidic substrates (pH>5.5). 5 This pattern of higher richness with higher pH occurs across other tundra types throughout the Arctic, suggesting that soil pH is an important filter of the regional species pool within northern regions, although other factors may become more important at local scales. Text Arctic Tundra Unknown Arctic |
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language |
English |
topic |
biomass landscape age spatial heterogeneity species density species diversity |
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biomass landscape age spatial heterogeneity species density species diversity Laura Gough Gaius R. Shaver Jenny Carroll Dana L. Royer James A. Laundre Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH |
topic_facet |
biomass landscape age spatial heterogeneity species density species diversity |
description |
1 Species diversity in the Arctic varies dramatically across abiotic gradients, includ-ing topography, moisture, pH and nutrient availability. We hypothesized that vas-cular plant species density, richness and diversity in Alaskan tundra would be correlated with: (i) site age, (ii) soil pH, (iii) above-ground productivity and bio-mass, and (iv) spatial heterogeneity. We sampled moist tussock, snowbed and watertrack communities in three sites that diered in substrate age (11 000–4.5 mil-lion years since deglaciation) for a variety of environmental and vegetation data over one growing season. 2 Productivity, biomass and heterogeneity were not consistently correlated with species density. However, variation in canopy height was correlated with species density and richness in a unimodal fashion, suggesting that heterogeneity of the light regime may be important for maintaining higher species numbers. 3 The 11 000-year-old site supported more vascular plant species than the two older sites, primarily due to greater numbers of forb species on the youngest site. 4 Soil pH was significantly positively correlated with species richness (R2=0.82) and species density (R2=0.61). In general the species found on acidic substrates (pH<5.5) also occurred on non-acidic substrates (pH>5.5). 5 This pattern of higher richness with higher pH occurs across other tundra types throughout the Arctic, suggesting that soil pH is an important filter of the regional species pool within northern regions, although other factors may become more important at local scales. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Laura Gough Gaius R. Shaver Jenny Carroll Dana L. Royer James A. Laundre |
author_facet |
Laura Gough Gaius R. Shaver Jenny Carroll Dana L. Royer James A. Laundre |
author_sort |
Laura Gough |
title |
Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH |
title_short |
Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH |
title_full |
Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH |
title_fullStr |
Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH |
title_full_unstemmed |
Vascular plant species richness in Alaskan arctic tundra: the importance of soil pH |
title_sort |
vascular plant species richness in alaskan arctic tundra: the importance of soil ph |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.8088 http://droyer.web.wesleyan.edu/Toolik.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
http://droyer.web.wesleyan.edu/Toolik.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.8088 http://droyer.web.wesleyan.edu/Toolik.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766325928442462208 |