Search Results - "Siemens, David H"

Evolutionary constraint on low elevation range expansion: Defense‐abiotic stress‐tolerance trade‐off in crosses of the ecological model Boechera stricta by Olsen, Jason, Singh Gill, Gunbharpur, Haugen, Riston, Matzner, Steven L., Alsdurf, Jake, Siemens, David H.

“…Most transplant experiments across species geographic range boundaries indicate that adaptation to stressful environments outside the range is often…”
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Abiotic and biotic controls on local spatial distribution and performance of Boechera stricta by Naithani, Kusum J, Ewers, Brent E, Adelman, Jonathan D, Siemens, David H

“…This study investigates the relative influence of biotic and abiotic factors on community dynamics using an integrated approach and highlights the influence of…”
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Effect of Drought on Herbivore-Induced Plant Gene Expression: Population Comparison for Range Limit Inferences by Gill, Gunbharpur Singh, Haugen, Riston, Matzner, Steven L, Barakat, Abdelali, Siemens, David H

“…Low elevation "trailing edge" range margin populations typically face increases in both abiotic and biotic stressors that may contribute to range limit…”
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Simultaneous Evolution of Competitiveness and Defense: Induced Switching in Arabis drummondii by Jones, Tessa, Kulseth, Shannon, Mechtenberg, Karl, Jorgenson, Charles, Zehfus, Michael, Brown, Paul, Siemens, David H.

“…Optimality theory for plant defense against herbivores predicts an evolutionary tradeoff between the abilities to compete and defend. We tested this hypothesis…”
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Cost of resistance and tolerance under competition: the defense-stress benefit hypothesis by Siemens, David H., Lischke, Heike, Maggiulli, Nicole, Schürch, Stéphanie, Roy, Bitty A.

“…Defense costs provide a major explanation for why plants in nature have not evolved to be better defended against pathogens and herbivores; however, evidence…”
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Epigenetics of drought-induced trans-generational plasticity: consequences for range limit development by Alsdurf, Jacob, Anderson, Cynthia, Siemens, David H.

“…Offspring phenotypes may be altered by environments that their parents lived in. These environmentally-induced trans-generational effects may be mediated by…”
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Water deficiency induces evolutionary tradeoff between stress tolerance and chemical defense allocation that may help explain range limits in plants by Siemens, David H, Duvall‐Jisha, John, Jacobs, Jay, Manthey, Joseph, Haugen, Riston, Matzner, Steve

“…What causes range limits is a central question in evolutionary ecology. Transplant studies indicate that areas just across range boundaries are often…”
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Evolution of drought tolerance and defense: dependence of tradeoffs on mechanism, environment and defense switching by Haugen, Riston, Steffes, Lexi, Wolf, Joy, Brown, Paul, Matzner, Steven, Siemens, David H.

“…Plants evolve defenses against herbivores and pathogens in stressful environments; however, plants that evolve tolerances to other environmental stressors may…”
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Plant chemical defense allocation constrains evolution of tolerance to community change across a range boundary by Siemens, David H., Haugen, Riston

“…Because transplant experiments show that performance usually decreases across species range boundaries, some range limits might develop from factors and…”
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Plant chemical defence allocation constrains evolution of local range by Siemens, David H, Haugen, Riston, Matzner, Steven, Vananasma, Nicholas

“…Many species of plants in the wild are distributed spatially in patches, the boundaries of which may occur and change because of a complicated interplay…”
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Optimal defense in plants: assessment of resource allocation costs by Siemens, David H, Keck, Andrew G, Ziegenbein, Shane

“…Genetic and environmental variation of functional traits within populations might be maintained by natural selection when resource allocation costs (RACs)…”
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Cost of Defense in the Context of Plant Competition: Brassica rapa May Grow and Defend by Siemens, David H., Garner, Shannon H., Mitchell-Olds, Thomas, Callaway, Ragan M.

“…Theory on costs of plant defense against herbivory in stressful environments predicts that costs should increase when competition is intense. This amplifies a…”
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Ecological genomics--changing perspectives on Darwin's basic concerns by Renn, Suzy C.P, Siemens, David H

“…Ecological Genomics is an interdisciplinary field that seeks to understand the genetic and physiological basis of species interactions for evolutionary…”
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Drought-induced trans-generational tradeoff between stress tolerance and defence: consequences for range limits? by Alsdurf, Jacob D., Ripley, Tayler J., Matzner, Steven L., Siemens, David H.

“…In the study of geographic range boundary development, the focus has been on leading rather than on trailing edge dynamics. This is an important caveat as…”
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Tests for Parasite-mediated Frequency-dependent Selection in Natural Populations of an Asexual Plant Species by Siemens, David H, Roy, Bitty A

“…Genetic variation in plant populations for resistance to pathogens and herbivores might be maintained by parasite-mediated negative frequency-dependent…”
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Evolution of pest-induced defenses in Brassica plants: tests of theory by Siemens, David H., Mitchell-Olds, Thomas

“…Theory on the evolution of pest-induced defenses in plants predicts (1) a negative genetic correlation between induced and constitutive (basal) levels of…”
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Ecological costs of plant resistance to herbivores in the currency of pollination by Strauss, S.Y, Siemens, D.H, Decher, M.B, Mitchell-Olds, T

“…In this paper, we examine how ecological costs of resistance might be manifested through plant relationships with pollinators. If defensive compounds are…”
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Cost of Defense in the Context of Plant Competition: Brassica rapa May Grow and Defend by Siemens, David H., Garner, Shannon H., Mitchell-Olds, Thomas, Callaway, Ragan M.

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Ecological genomics-changing perspectives on Darwin’s basic concerns: ECOLOGICAL GENOMICS by RENN, SUZY C. P., SIEMENS, DAVID H.

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Factors affecting regulation of maternal investment in an indeterminate flowering plant (Cercidium microphyllum; Fabaceae) by Siemens, D.H. (University of Montana, Missoula, MT.)

“…On palo verde trees, nearly 80% of potential offspring were lost during flower bud development. Flower buds at the base of racemes developed earliest and were…”
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