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Articles 61 - 65 of 65
Full-Text Articles in Life Sciences
Sustainability Of Mahogany Production In Plantations: Does Resource Availability Influence Susceptibility Of Young Mahogany Plantation Stands To Hypsipyla Robusta Infestation?, C. B. Darko, E. Opuni-Frimpong, S. A. Owusu, B. Kyere, A. J. Storer
Sustainability Of Mahogany Production In Plantations: Does Resource Availability Influence Susceptibility Of Young Mahogany Plantation Stands To Hypsipyla Robusta Infestation?, C. B. Darko, E. Opuni-Frimpong, S. A. Owusu, B. Kyere, A. J. Storer
Michigan Tech Publications
Hypsipyla robusta Moore (Lepidoptera: Pyralidae), like many other moth species, shows selectivity when choosing host plants for its eggs. Four Meliaceae species (Khaya grandifoliola, K. ivorensis, Swietenia macrophyla, and Entandrophragma cylindricum) were established in a moist semideciduous forest in Ghana to study this selectivity at 12 and 21 months after planting. The analysis of variance (ANOVA) at a P-value of 0.05 was used to test the significance of differences in infestation by H. robusta between the species. H. robusta attacks were recorded by month 12 after planting in the field, and only Khaya spp. was attacked, with attacks evident on …
Montane Temperate-Boreal Forests Retain The Leaf Economic Spectrum Despite Intraspecific Variability, Matthew J. Hecking, Jenna M. Zukswert, John E. Drake, Martin Dovciak, Julia I. Burton
Montane Temperate-Boreal Forests Retain The Leaf Economic Spectrum Despite Intraspecific Variability, Matthew J. Hecking, Jenna M. Zukswert, John E. Drake, Martin Dovciak, Julia I. Burton
Michigan Tech Publications
Trait-based analyses provide powerful tools for developing a generalizable, physiologically grounded understanding of how forest communities are responding to ongoing environmental changes. Key challenges lie in (1) selecting traits that best characterize the ecological performance of species in the community and (2) determining the degree and importance of intraspecific variability in those traits. Recent studies suggest that globally evident trait correlations (trait dimensions), such as the leaf economic spectrum, may be weak or absent at local scales. Moreover, trait-based analyses that utilize a mean value to represent a species may be misleading. Mean trait values are particularly problematic if species …
Impact Of Edds Dosage On Lead Phytoextraction In Contaminated Urban Residential Soils, Zhiming Zhang, Dibyendu Sarkar, Virinder Sidhu, Manas Warke, Rupali Datta
Impact Of Edds Dosage On Lead Phytoextraction In Contaminated Urban Residential Soils, Zhiming Zhang, Dibyendu Sarkar, Virinder Sidhu, Manas Warke, Rupali Datta
Michigan Tech Publications
Lead (Pb) contamination in soils of residential properties due to peeling and chipping of Pb-based paint can cause human health problems. Phytoextraction is a green technology that has the potential to remediate soil Pb. The efficiency of phytoextraction is dependent on the geochemical forms of Pb in soil. A biodegradable chelating agent, ethylenediaminedisuccinic acid (EDDS), was previously shown to enhance Pb removal by facilitating phytoextraction. In this study, EDDS was tested at various concentrations for its potential in mobilizing Pb in urban residential soils in Jersey City, New Jersey, and San Antonio, Texas. Results show that the concentrations of plant-available …
Pyrogenic Carbon Content Of Sphagnum Peat Soils Estimated Using Diffuse Reflectance Ftir Spectrometry, Dominic Uhelski, Evan S. Kane, Rodney Chimner, Katherine A. Heckman, Jessica Miesel, Li Xie
Pyrogenic Carbon Content Of Sphagnum Peat Soils Estimated Using Diffuse Reflectance Ftir Spectrometry, Dominic Uhelski, Evan S. Kane, Rodney Chimner, Katherine A. Heckman, Jessica Miesel, Li Xie
Michigan Tech Publications
Quantifying historical patterns of fire regimes in peatlands can help contextualise current fire behaviour and aid in planning on ecosystem and landscape scales. However, current methods for detecting the evidence of past fires in peat soils are laborious or expensive. Our goal was to develop an effective and inexpensive method for detecting pyrogenic carbon (PyC) concentration in peat which could be used to estimate the occurrence of fires by analysis of discrete soil samples. We correlated diffuse reflectance Fourier-transform infrared spectrometry (FTIR) measurements of peat, and admixtures of peat and PyC, with nuclear magnetic resonance spectrometry (NMR) estimates of PyC …
Emissions, Shawn Urbanski, Susan O'Neill, Amara L. Holder, Sarah Green, Rick L. Graw
Emissions, Shawn Urbanski, Susan O'Neill, Amara L. Holder, Sarah Green, Rick L. Graw
Michigan Tech Publications
This chapter assesses the current state of the science regarding the composition, intensity, and drivers of wildland fire emissions in the USA and Canada. Globally and in the USA wildland fires are a major source of gases and aerosols which have significant air quality impacts and climate interactions. Wildland fire smoke can trigger severe pollution episodes with substantial effects on public health. Fire emissions can degrade air quality at considerable distances downwind, hampering efforts by air regulators to meet air standards. Fires are a major global source of aerosols which affect the climate system by absorbing and scattering radiation and …