Search Results - "Norghauer, Julian M."

Soil Carbon and Nitrogen Stocks and Their Influencing Factors in Different-Aged Stands of Sand-Fixing Caragana korshinskii in the Mu Us Desert of Northwest China by Shuang Yu, Junlong Yang, Julian M. Norghauer, Jun Yang, Bo Yang, Hongmei Zhang, Xiaowei Li

“…Establishing artificial sand-fixing shrubs is a key measure to curb dune flow and drive changes in the soil stocks and cycling of carbon and nitrogen. But our…”
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Indications of an Achaea sp. caterpillar outbreak disrupting fruiting of an ectomycorrhizal tropical tree in Central African rainforest by Norghauer, Julian M., Newbery, David M., Neba, Godlove A.

“…Background and aims – Where one or several tree species come to dominate patches of tropical forest, as many masting ectomycorrhizal legumes do in Central…”
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The importance of tree size and fecundity for wind dispersal of big-leaf mahogany by Norghauer, Julian M, Nock, Charles A, Grogan, James

“…Seed dispersal by wind is a critical yet poorly understood process in tropical forest trees. How tree size and fecundity affect this process at the population…”
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Herbivores limit the population size of big‐leaf mahogany trees in an Amazonian forest by Norghauer, Julian M, Free, Christopher M, Landis, R. Matthew, Grogan, James, Malcolm, Jay R, Thomas, Sean C

“…The Janzen–Connell hypothesis proposes that specialized herbivores maintain high numbers of tree species in tropical forests by restricting adult recruitment…”
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Intraspecific allometries reveal hyper‐slender stems in forest gaps and the impact on tree growth from insect herbivores by Norghauer, Julian M.

“…Conspicuously absent from plant allometric models are insect herbivores, despite their ubiquity in pantropical forests as well as the importance of gauging…”
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Insects and light interact to mediate vine colonization of fast growing Microberlinia bisulcata tree seedlings in gaps of an African rain forest by Norghauer, Julian M.

“…Vines thrive in lowland tropical forests, yet the biotic factors underlying their colonization of host tree seedlings and saplings remain surprisingly…”
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Island invasion by a threatened tree species: evidence for natural enemy release of mahogany (Swietenia macrophylla) on Dominica, Lesser Antilles by Norghauer, Julian M, Martin, Adam R, Mycroft, Erin E, James, Arlington, Thomas, Sean C

“…Despite its appeal to explain plant invasions, the enemy release hypothesis (ERH) remains largely unexplored for tropical forest trees. Even scarcer are ERH…”
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What loggers leave behind: Impacts on big-leaf mahogany ( Swietenia macrophylla) commercial populations and potential for post-logging recovery in the Brazilian Amazon by Grogan, James, Jennings, Stephen B., Landis, R. Matthew, Schulze, Mark, Baima, Anadilza M.V., Lopes, J. do Carmo A., Norghauer, Julian M., Oliveira, L. Rogério, Pantoja, Frank, Pinto, Diane, Silva, Jose Natalino M., Vidal, Edson, Zimmerman, Barbara L.

“…The sustainability of current harvest practices for high-value Meliaceae can be assessed by quantifying logging intensity and projecting growth and survival by…”
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Tree size and fecundity influence ballistic seed dispersal of two dominant mast-fruiting species in a tropical rain forest by Norghauer, Julian M., Newbery, David M.

“…•Seed production of >200 trees of two forest canopy species was directly measured.•Fecundity was size-dependent, skewed within populations, and unequal between…”
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Juvenile mortality and attacks by a specialist herbivore increase with conspecific adult basal area of Amazonian Swietenia macrophylla (Meliaceae) by Norghauer, Julian M., Malcolm, Jay R., Zimmerman, Barbara L.

“…According to the Janzen–Connell model, host-specific natural enemies can promote species coexistence of canopy trees in tropical forests by attacking progeny…”
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Density-dependent dynamics of a dominant rain forest tree change with juvenile stage and time of masting by Norghauer, Julian M., Newbery, David M.

“…Although negative density dependence (NDD) can facilitate tree species coexistence in forests, the underlying mechanisms can differ, and rarely are the…”
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Herbivores differentially limit the seedling growth and sapling recruitment of two dominant rain forest trees by Norghauer, Julian M, Newbery, David M

“…Resource heterogeneity may influence how plants are attacked and respond to consumers in multiple ways. Perhaps a better understanding of how this interaction…”
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Herbivores equalize the seedling height growth of three dominant tree species in an African tropical rain forest by Norghauer, Julian M., Newbery, David M.

“…•Seedlings of all three tree species were stunted in the forest understorey.•In gaps, herbivores reduced most the height and leaf growth of M…”
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Seedling resistance, tolerance and escape from herbivores: insights from co‐dominant canopy tree species in a resource‐poor African rain forest by Norghauer, Julian M, Glauser, Gaëtan, Newbery, David M, Dalling, Jim

“…Although plants can reduce the impacts of herbivory in multiple ways, these defensive traits are often studied in isolation and an understanding of the…”
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Recruitment limitation after mast-seeding in two African rain forest trees by Norghauer, Julian M, Newbery, David M

“…Seed and establishment limitation can have a major role in determining plant species' abundances and distributions in communities. Their relative importance,…”
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Canopy gaps promote selective stem-cutting by small mammals of two dominant tree species in an African lowland forest: the importance of seedling chemistry by Norghauer, Julian M., Röder, Gregory, Glauser, Gaëtan

“…Small mammals can impede tree regeneration by injuring seedlings and saplings in several ways. One fatal way is by severing their stems, but apparently this…”
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Canopy cover mediates interactions between a specialist caterpillar and seedlings of a neotropical tree by Norghauer, Julian M., Malcolm, Jay R., Zimmerman, Barbara L.

“…1. Light availability may be crucial for understanding dynamics of plant-herbivore interactions in temperate and tropical forest communities. This is because…”
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Seed fate and seedling dynamics after masting in two African rain forest trees by Norghauer, Julian M, Newbery, David M

“…How the effects of biotic factors are moderated by abiotic factors, and their consequences for species interactions, is generally understudied in ecology. A…”
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Long-distance dispersal helps germinating mahogany seedlings escape defoliation by a specialist caterpillar by Norghauer, Julian M, Grogan, James, Malcolm, Jay R, Felfili, Jeanine M

“…Herbivores and pathogens with acute host specificity may promote high tree diversity in tropical forests by causing distance- and density-dependent mortality…”
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Do fungal pathogens drive density-dependent mortality in established seedlings of two dominant African rain-forest trees? by Norghauer, Julian M., Newbery, David M., Tedersoo, Leho, Chuyong, George B.

“…Where one or a few tree species reach local high abundance, different ecological factors may variously facilitate or hinder their regeneration. Plant pathogens…”
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