Variations in quantitative vessel element characters of Juglans regia L. wood were studied in relation to altitude and growth-ring width. Multiple regression analysis using altitude and growth-ring width as independent variables were performed. Significant correlations were obtained for tangential vessel…

This paper highlights and expands on some of the major points of good taxonomic practice. Myxomycete species concepts are reviewed, monotypic genera are discussed and critiqued, and case study examples are given for Badhamiopsis ainoae, Protophysarum phloiogenum, and Trabrooksia applanata.…

The diversity and distribution of appendicularians on the continental shelf and upper part of the oceanic sea in the southern Gulf of Mexico is analyzed here for the first time. Samples were collected in September 2003 using a fine mesh…

The ecological niche of a parasite exists only at the nexus of certain abiotic and biotic conditions suitable for both the definitive and intermediate hosts. However, the life cycles of most parasites are not known, or are poorly known, and…

A key indicator of soil quality as organic carbon needs to be enhanced in the highly weathered soils predominant in southeastern Nigeria through appropriate tillage-mulch practices and cropping systems. We subjected a degraded Typic Paleustult (sandy loam) at Nsukka to…