Growth of the rare southern appalachian endemic plant houstonia montana (Rubiaceae) in contrasting habitat types<sup>1</sup>

Euliss, Amy C. EulissA.C.; Fisk, Melany C.; McCleneghan, S. Coleman; Neufeld, Howard S.

doi:10.3159/1095-5674(2007)134[177:gotrsa]2.0.co;2

The Journal of the Torrey Botanical Society

2007

DOI: 10.3159/1095-5674(2007)134[177:gotrsa]2.0.co;2

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Growth of the rare southern appalachian endemic plant houstonia montana (Rubiaceae) in contrasting habitat types¹

Amy C. EulissA.C. Euliss¹,

Melany C. Fisk²,

S. Coleman McCleneghan³

et al.

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Cited by 3 publications

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Spatial patterns along an elevation gradient in high altitude grasslands, Brazil

Cordeiro

Neri

2019

Nordic Journal of Botany

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The Brazilian high altitude grasslands are important biodiversity centers that contribute to human well‐being far outside their boundaries. They host many vulnerable species that may go locally extinct as a result of small changes in the environment. Performing studies on local species distribution is important to guide biodiversity conservation in these areas. This study aimed to characterize a high altitude grassland plant community along an elevation gradient in southeastern Brazil. Simple logistic regression, chi‐squared tests and indicator species analysis were performed to investigate respectively whether: 1) the occurrence of botanical families was related to the altitude; 2) the richness and abundance of life forms varied along the gradient and 3) there were populations associated with specific altitudinal belts. Rubiaceae and Polygalaceae had higher occurrence probability at higher altitudes. Hemicryptophytes and chamaephytes seem to be the most favored life forms under local extreme conditions such as low temperatures and drought. The vegetation spectra varied significantly along the gradient, highlighting the major role of the turnover of habitats on a local scale for the underlying patterns of species distribution. Upper elevations encompassed a high number of indicator species, and further analyses of indicator species of high altitude grasslands will provide clues about adaptability of local species, important to consider in ecosystem management and conservation.

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Spatial patterns along an elevation gradient in high altitude grasslands, Brazil

Cordeiro

Neri

2019

Nordic Journal of Botany

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Allocation and morphological responses to resource manipulations are unlikely to mitigate shade intolerance in Houstonia montana, a rare southern Appalachian herb

et al. 2007

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High light requirements limit the distribution of several rare plant species endemic to the southern Appalachian region. We studied the influence of light and nitrogen availability on carbon allocation and morphology in one of these species, Houstonia montana Small. Insights into growth and nutrition of H. montana are needed for predicting how it will respond to ongoing changes in its environment associated with atmospheric nitrogen deposition and resulting from succession and (or) management of grassy-bald habitats in which it occurs. We hypothesized that low light constrains belowground allocation, and that elevated N availability reduces limitations to aboveground growth at low light. We tested growth and mycorrhizal colonization of H. montana in response to interactions of light and N availability in a greenhouse experiment. Shade reduced plant biomass, root:shoot ratios, and mycorrhizal colonization, and increased specific leaf area (area/mass). Elevated N reduced root:shoot ratios and mycorrhizal colonization. Under low light, N addition increased specific root length (length/mass) and foliar chlorophyll. We found support for the hypotheses that low light and high N reduce belowground allocation in H. montana. However, we did not find that high N significantly alleviates limitation to plant growth in the shade, despite changes in allocation, morphology, and chemistry that were consistent with more efficient use of C for aboveground growth. Thus, variation in the soil N availability is unlikely to have a marked effect on the ability of H. montana to tolerate shade in its native habitat.

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Evidence for hybridization between the endangered Roan Mountain bluet, Houstonia purpurea var. montana (Rubiaceae) and its common congener¹

Glennon¹,

Donaldson²,

Church³

2011

The Journal of the Torrey Botanical Society

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Growth of the rare southern appalachian endemic plant houstonia montana (Rubiaceae) in contrasting habitat types¹

Cited by 3 publications

References 19 publications

Spatial patterns along an elevation gradient in high altitude grasslands, Brazil

Spatial patterns along an elevation gradient in high altitude grasslands, Brazil

Allocation and morphological responses to resource manipulations are unlikely to mitigate shade intolerance in Houstonia montana, a rare southern Appalachian herb

Evidence for hybridization between the endangered Roan Mountain bluet, Houstonia purpurea var. montana (Rubiaceae) and its common congener¹

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Growth of the rare southern appalachian endemic plant houstonia montana (Rubiaceae) in contrasting habitat types1

Cited by 3 publications

References 19 publications

Spatial patterns along an elevation gradient in high altitude grasslands, Brazil

Spatial patterns along an elevation gradient in high altitude grasslands, Brazil

Allocation and morphological responses to resource manipulations are unlikely to mitigate shade intolerance in Houstonia montana, a rare southern Appalachian herb

Evidence for hybridization between the endangered Roan Mountain bluet, Houstonia purpurea var. montana (Rubiaceae) and its common congener1

Contact Info

Product

Resources

About

Growth of the rare southern appalachian endemic plant houstonia montana (Rubiaceae) in contrasting habitat types¹

Evidence for hybridization between the endangered Roan Mountain bluet, Houstonia purpurea var. montana (Rubiaceae) and its common congener¹