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10 results for “stomatal density”
Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) - stomatal density and length 2021-2022
Stomatal density and length were measured on leaves of sugar maple (Acer sacharrum Marsh.) and yellow birch (Betula alleghaniensis Britton.) trees in New Hampshire at the Bartlett Experimental Forest, Hubbard Brook Experimental Forest, and Jeffers Brook as part of the Multiple Elementation Limitation in Northern Hardwood Ecosystems (MELNHE) study. Leaves were collected in late July and early August in 2021 and 2022 from the tops of dominant and codominant trees using a shotgun. These measurements were made on 3 leaves from each tree. These data correspond with other foliar trait data collected from the same trees in 2021 and 2022. That EDI package is as follows: Hong, S.D., K.E. Gonzales, C.R. See, and R.D. Yanai. 2021. MELNHE: Foliar Chemistry 2008-2016 in Bartlett, Hubbard Brook, and Jeffers Brook (12 stands) ver 1. Environmental Data Initiative. https://doi.org/10.6073/pasta/b23deb8e1ccf1c1413382bf911c6be19 This data package contains the stomatal density and length derived from the raw images in a separate EDI data package: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=321 These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) - Raw images for the analysis of stomatal density and length 2021-2022
Stomatal density and length were measured on leaves of sugar maple (Acer sacharrum Marsh.) and yellow birch (Betula alleghaniensis Britton.) trees in New Hampshire at the Bartlett Experimental Forest, Hubbard Brook Experimental Forest, and Jeffers Brook as part of the Multiple Elementation Limitation in Northern Hardwood Ecosystems (MELNHE) study. Leaves were collected in late July and early August in 2021 and 2022 from the tops of dominant and codominant trees using a shotgun. These measurements were made on 3 leaves from each tree. These data correspond with other foliar trait data collected from the same trees in 2021 and 2022. That EDI package is as follows: Hong, S.D., K.E. Gonzales, C.R. See, and R.D. Yanai. 2021. MELNHE: Foliar Chemistry 2008-2016 in Bartlett, Hubbard Brook, and Jeffers Brook (12 stands) ver 1. Environmental Data Initiative. https://doi.org/10.6073/pasta/b23deb8e1ccf1c1413382bf911c6be19 This data package contains the raw images underlying the data reported in a separate data package on stomatal density and length: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=372 These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Elucidating the association of trichome and stomatal densities across species
<p>Previous studies suggested a trade-off between trichome density (<em>D</em><sub>t</sub>) and stomatal density (<em>D</em><sub>s</sub>) due to shared cell precursors. We clarified how, when, and why this developmental trade-off may be overcome across species. We derived equations to determine the developmental basis for <em>D</em><sub>t</sub> and <em>D</em><sub>s</sub> in trichome and stomatal indices (<em>i</em><sub>t</sub> and <em>i</em><sub>s</sub>), and the sizes of epidermal pavement cells (<em>e</em>), trichome bases (<em>t</em>) and stomata (<em>s</em>), and quantified the importance of these determinants of <em>D</em><sub>t</sub> and <em>D</em><sub>s</sub> for 78 California species. We compiled 17 previous studies of <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> relationships to determine the commonness of <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> associations. We modelled the consequences of different <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> associations for plant carbon balance. Our analyses showed that higher <em>D</em><sub>t</sub> was determined by higher <em>i</em><sub>t</sub> and lower <em>e</em>, and higher <em>D</em><sub>s</sub> by higher <em>i</em><sub>s</sub> and lower <em>e</em>. Across California species, positive <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> coordination arose due to <em>i</em><sub>t</sub>-<em>i</em><sub>s</sub> coordination and impacts of the variation in <em>e</em>. A <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> trade-off was found in only 30% of studies. Heuristic modeling showed that species sets would have the highest carbon balance with a positive or negative relationship or decoupling of <em>D</em><sub>t</sub> and <em>D</em><sub>s</sub>, depending on environmental conditions. Shared precursor cells of trichomes and stomata do not limit higher numbers of both cell types, or drive a general <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> trade-off across species. This developmental flexibility across diverse species enables different <em>D</em><sub>t</sub>-<em>D</em><sub>s</sub> associations according to environmental pressures.<sub> </sub>Developmental trait analysis can clarify how contrasting trait associations would arise within and across species.</p>
Stomatal density, size and space-use efficiency at the community level in China
<p>The maximum stomatal conductance (<em>g</em>), a major anatomical constraint on plant productivity, is a function of the stomatal area fraction (<em>f</em>) and stomatal space-use efficiency (<em>e</em>). However, <em>f</em> and <em>g</em> have been considered as equivalents, with <em>e</em> rarely considered, and their adaptation to the environment and their regulation of ecosystem productivity are unclear. Here, we analyzed the community-weighted mean, variance, skewness, and kurtosis of stomatal traits from tropical to cold-temperature forests. The variance of <em>g</em> and <em>f</em> was higher for arid sites, indicating greater functional niche differentiation, whereas that for <em>e</em> was lower, indicating convergence in efficiency. Besides, when other stomatal trait distributions remained unchanged, increasing kurtosis but decreasing skewness of <em>g</em> would improve ecosystem productivity<em>, </em>and <em>f</em> showed the opposite patterns. These findings highlight how the relative importance and equivalence of inter-related traits can differ at community scale.</p>
Elucidating the association of trichome and stomatal densities across species
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Stomatal density, size and space-use efficiency at the community level in China
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Salmonberry stomatal density
<p>Triangle Island on Canada's Pacific coast is home to a large, globally important seabird breeding colony. The shrub Salmonberry <i>Rubus spectabilis</i> and tussock-forming Tufted Hairgrass <i>Deschampsia cespitosa</i> together form ~70% of vegetation coverage, and contain the vast majority (~90%) of seabird nesting burrows. Salmonberry has in recent decades greatly expanded its coverage, while that of Tufted Hairgrass has receded. Seabirds prefer not to burrow under Salmonberry, making its ongoing expansion a potential conservation issue.</p> <p>We investigated three hypotheses proposed to explain Salmonberry's expansion (climate change, biopedturbation, nutrient input), using comparisons of stomatal density of Salmonberry leaves sampled from Triangle Island, other seabird colonies, other coastal locations, and from historical specimens in herbaria. Stomatal density helps regulate photosynthetic gain and control water loss, and responds to light, nutrient, carbon dioxide and water availability. Differing patterns of stomatal density are expected among sample locations depending on which of the hypothesized factors most strongly affects Salmonberry's performance. Our data are most consistent with the nutrient input hypothesis. We discuss possible reasons why Salmonberry has expanded so recently, even though Triangle has been a large seabird colony for at least a century and likely much longer.</p>
Data from: From salmon to salmonberry: the effects of salmon-derived nutrients on the stomatal density of leaves of the nitriphillic shrub Rubus spectabilis
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Salmonberry stomatal density
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Correlation and co-localization of QTLs for stomatal density, canopy temperature, and productivity with and without drought stress in Setaria
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