Index Herbariorum

Holmgren, Patricia K.; Holmgren, Noel H.

doi:10.1002/j.1996-8175.1991.tb01215.x

Cited by 73 publications

(66 citation statements)

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“…Nomenclature generally follows Va´z-quez- Garcı´a et al (1995). Herbarium specimens were deposited at IBUG herbaria of the University of Guadalajara (Holmgren et al 1990;Holmgren and Holmgren 1993).…”

Section: Field Samplingmentioning

confidence: 99%

Environmental Correlates of Tree and Seedling–Sapling Distributions in a Mexican Tropical Dry Forest

2005

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Bray and Curtis ordination was used to explore which environmental variables explained importance values and the presence-absence of tropical tree seedlings, saplings and adults in La Escondida-La Caban˜a, Sierra de Manantla´n, Jalisco, Mexico. The diameters of trees ‡2.5 cm DBH and the presence and height of seedlings and saplings were measured in nine 0.1 ha sites. Four matrices including presence-absence data and importance value indices for trees and seedlings and saplings were analyzed through Bray and Curtis ordination. The matrices were based on density, frequency, and dominance of adult trees as well as seedlings and saplings. The environmental matrix consisted of 18 variables, including elevation, slope, canopy gaps, disturbance, and soil variables. We recorded 63 tree species and 38 seedling and sapling species in the nine sites. The ordination explained 70.9% of the variation in importance value data for trees and 62.6% for seedlings and saplings. The variation explained in presence-absence data for trees was 67.1 and 77.4% for seedlings and saplings. The variance in the ordination axes of seedlings and sapling presence-absence data was poorly explained by the number of gaps in the tree, shrub, or herb layer, suggesting little light specialization by seedlings and saplings. Habitat specialization for soil nutrients appears to be important in explaining the presence-absence of seedlings and saplings. Seedling and sapling specialization along different soil microsites could promote species coexistence in this forest, while heterogeneity in light conditions may instead determine differences in growth and, thus, importance value of trees. We hypothesize that in tropical dry forest in Jalisco, Mexico, a habitat specialization for soil resources is likely more important at early stages in tree life histories than in later life history.

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Section: Field Samplingmentioning

confidence: 99%

Environmental Correlates of Tree and Seedling–Sapling Distributions in a Mexican Tropical Dry Forest

2005

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“…Color names followed by (R) are from Ridgway (1912). Herbaria in which collections are deposited are indicated following descriptions of each species; abbreviations used for herbarium names are from Holmgren et al (1990), with the exception of the National Institute of Genetic Engineering and Biotechnology Herbarium, Bangkok, which is listed as NCGEB.…”

Section: Methodsmentioning

confidence: 99%

On some species of Mycogloea

Bandoni

1998

Mycoscience

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“…A representative collection of herbarium specimens was loaned from B, BM, BOL, ETH, K, NBG (incorporating the South African Museum Herbarium, SAM, and Stellenbosch Herbarium, STE) and PRE to supplement those at J (abbreviations according to Holmgren et al 1990) to cover the entire range of known distribution of O. rochetiana sensu lato (see Appendix 1 for list). The specimens were studied and sorted a priori into hypothetical groups, without regard to names on labels, and based solely on the similarity of a few macro-and micro-morphological characters previously used in Olinia to define taxonomic groups.…”

Section: Study Materials and Measurementsmentioning

confidence: 99%

Numerical phenetic analysis of Olinia rochetiana sensu lato (Oliniaceae)

Sebola

Balkwill

2009

Kew Bull

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Previous circumscriptions of Olinia rochetiana A. Juss. (Oliniaceae) presented a taxonomically variable and widespread species complex in central and tropical East Africa. Results of numerical phenetic analyses of morphological variation within O. rochetiana sensu lato indicate the existence of four taxa which are recognisable at specific rank corresponding to O. huillensis Welw. ex A. & R. Fern., O. ruandensis Gilg, O. rochetiana A. Juss. sensu stricto and O. usambarensis Gilg ex Engl. The analyses also indicate that O. huillensis, hitherto reported to occur only in Angola, occurs widely in southern Africa and shows geographic segregates characterised as O. huillensis Welw. subsp. huillensis, O. huillensis subsp. burttdavii Sebola and O. huillensis subsp. discolor Sebola (Map 2). The major delimiting characters were found to be the shapes of petals and leaves, presence or absence of indumentum and the degree of hairiness on floral parts, and the form of inflorescence units (i.e. being either compact or spreading). Phenetic and ecological concepts of species are applied at the specific and subspecific ranks, respectively. Keys to distinguish between the species and infraspecific taxa are presented, and full descriptions and citations of examined specimens are provided.

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Index Herbariorum

Cited by 73 publications

References 0 publications

Environmental Correlates of Tree and Seedling–Sapling Distributions in a Mexican Tropical Dry Forest

Environmental Correlates of Tree and Seedling–Sapling Distributions in a Mexican Tropical Dry Forest

On some species of Mycogloea

Numerical phenetic analysis of Olinia rochetiana sensu lato (Oliniaceae)

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