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- Howell, Brian E., et al. Show all 8 Authors
- Forest pathology 2019 v.49 no.1 pp. e12473
- Arceuthobium vaginatum; Pinus; case studies; coniferous forests; harvesting; hosts; parasitic plants; parasitism; timber production; tree diseases; trees; Mexico
- ... Mexican dwarf mistletoe (Arceuthobium vaginatum subsp. vaginatum, Viscaceae) is the most widespread and damaging parasitic plant in Mexico. It parasitizes 10 species of pines (Pinus spp., Pinaceae) as principal hosts, including Pinus cooperi, one of the economically most important pines in the state of Durango. As a case study, we used stem analysis to estimate the effects of Mexican dwarf mistlet ...
- Howell, Brian, et al. Show all 6 Authors
- Forest ecology and management 2010 v.260 no.5 pp. 638
- forest decline; Populus tremuloides; forest health; dieback; tree mortality; disease severity; disease outbreaks; climatic factors; climate change; drought; precipitation; roots; forest regeneration; equations; tree crown; slope; landscape position; forest trees; etiology; dry environmental conditions; soil water regimes; aridic regimes; risk assessment; forest stands; root growth; soil water; risk factors; wet-dry cycles; Colorado
- ... Sudden aspen decline (SAD), affecting Populus tremuloides, was first observed in Colorado in 2004. By 2008 it affected at least 220,000ha, an estimated 17% of the aspen cover type in the state. In southwestern Colorado, we examined site and stand features in paired healthy and damaged plots to assess the effects of SAD on aspen and to identify factors associated with decline. Root mortality increa ...
- Howell, Brian, et al. Show all 8 Authors
- Proceedings of the National Academy of Sciences of the United States of America 2007 v.104 no.20 pp. 8508-8513
- cell movement; ligands; mice; mutants; olfactory bulb; receptors; streams; very low density lipoprotein
- ... Postnatal migration of interneuron precursors from the subventricular zone to the olfactory bulb occurs in chains that form the substrate for the rostral migratory stream. Reelin is suggested to induce detachment of neuroblasts from the chains when they arrive at the olfactory bulb. Here we show that ApoER2 and possibly very-low-density lipoprotein receptor (VLDLR) and their intracellular adapter ...
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