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| Williams, R.B.. |
| In 1949, the late Professor Oskar Carlgren of Lund, Sweden, published a bibliographical survey of the sea anemones of the world, comprising 42 families, 201 genera and 848 species. The survey is an essential starting point for any taxonomic or zoogeographical work on sea anemones. However, the enormous wealth of information that it contains is difficult to extract, because of the lack of adequate indexation. Indexes have therefore been prepared to increase the usefulness of the survey. They are: I, Nomenclatural; II, Authors; III, Geographical. Two appendixes give details of new nominal taxa and nomina nuda published in the survey. No attempt has been made to correct or revise the results of Carlgren's survey: the objective is solely to facilitate the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cnidaria; Anthozoa; Ptychodactiaria; Corallimorpharia; Actiniaria; World survey; Indexes; Nomenclature; Authors; Geographical distribution; Professor Oskar Carlgren; 42.72. |
| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/318708 |
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| Herrera-Culma,Roberth Alberto; Calderón-Rodríguez,Lina Isabel; Gutiérrez-Malaxechebarría,Álvaro Martín. |
| Abstract This research aimed to generate a soil quality index which have allowed to compare the effect of conventional and semi-ecological plantain farming systems. For its construction, we considered biometric data of near-to-harvest plants, physical, chemical and biological indicators which were evaluated using a principal components analysis; the weight of each indicator was calculated, and so were the response curves, establishing a minimum set of data which includes: sand percentage, sheet of water, pH, Nitrogen, organic carbon percentage, potassium, biodiversity conservation and microbial respiration, respectively. In fact, this index was validated in areas cultivated with plantain cv. Dominic Harton in farms located in the same taxonomic unit in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Alternative agriculture; Indexes; Agricultural practices; Soil. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400457 |
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