Rank-Free Monography: A Practical Example From the Moss Clade &lt;I&gt;Leucophanella&lt;/I&gt; (Calymperaceae)

Fisher, Kirsten M.

doi:10.1600/036364406775971697

Cited by 17 publications

(11 citation statements)

References 42 publications

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“…Traditionally this has required the use of species, but it does not need to be this way. The possibility of building phylogenies without the prior use of species has already been demonstrated with the additional call to get rid of the species category altogether (Pleijel 1999;Pleijel and Rouse 2000a,b;Fisher 2006;Fisher et al 2007). While this position is consistent with my arguments here, it does not follow from them.…”

Section: What About Species?supporting

confidence: 85%

Phylogeny as population history

Velasco¹

2013

Philosophy and Theory in Biology

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The construction and use of phylogenetic trees is central to modern systematics. But it is unclear exactly what phylogenies and phylogenetic trees represent. They are sometimes said to represent genealogical relationships between taxa, between species, or simply between "groups of organisms." But these are incompatible representational claims. This paper focuses on how trees are used to make inferences and then argues that this focus requires that phylogenies represent the histories of populations.

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Section: What About Species?supporting

confidence: 85%

Phylogeny as population history

Velasco¹

2013

Philosophy and Theory in Biology

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“…This could be due to the fact that these forest mosses possess leaves in which chlorocysts are sandwitched between several layers of large empty non-chlorophyllous hyalocysts, as a result of which the photosynthetic cells are protected from photo-oxidation (Fisher, 2006). Boardman (1977) also reported higher chlorophyll concentrations in leaves of plants growing in environment characterized by low irradiances (e.g.…”

Section: Discussionmentioning

confidence: 99%

Comparative Extraction of Chlorophylls in Selected Forest and Savanna Mosses Using Dimethylsulphoxide and Acetone

2016

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The present study compared the extraction of chlorophylls from selected forest mosses (Hyophila involuta and Thuidium gratum) and derived savanna moss (Archidium ohioense) using dimethylsulphoxide (DMSO) and 80% acetone. The mosses were collected from natural populations found in the Central Campus of the Obafemi Awolowo University, Ile-Ife, Nigeria. The chlorophyll extractions process followed standard methods and the absorbance of the extracts were read on spectrophotometer at wavelengths of 645 nm and 663 nm respectively. The data obtained were later subjected to appropriate statistical analysis. The results showed that DMSO was a better chlorophyll extractant for mosses than 80% acetone. Although there were significant differences in the chlorophyll a, chlorophyll a/b ratio and total chlorophyll accumulation within all three species using DMSO and 80% acetone as extractant (P < 0.05), there was no significant difference in the chlorophyll b accumulation of all the three species (P > 0.05).

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“…Pleijel and Rouse (2000a,b) advocate dropping the word 'species' and replacing it with the phrase "Least-Inclusive Taxonomic Units" or "LITUs," where an LITU is a type of phylogenetic species. Mishler and Fisher (Mishler 1999(Mishler , 2003Fisher 2006) maintain that all taxa are clades, and argue that because there is nothing special about those clades called 'species' so we should junk the word 'species.' Similar approaches to 'species' are found in the conservation literature.…”

Section: The Term 'Species'mentioning

confidence: 99%

“…that the species category does not exist (Ereshefsky 1998(Ereshefsky , 2001Mishler 1999Mishler , 2003Hendry et al 2000;Pleijel and Rouse 2000a,b;Fisher 2006). Many of those skeptics also suggest that the term 'species' should be eliminated from biology.…”

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confidence: 99%

Darwin’s solution to the species problem

Ereshefsky

2009

Synthese

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Biologists and philosophers that debate the existence of the species category fall into two camps. Some believe that the species category does not exist and the term 'species' should be eliminated from biology. Others believe that with new biological insights or the application of philosophical ideas, we can be confident that the species category exists. This paper offers a different approach to the species problem. We should be skeptical of the species category, but not skeptical of the existence of those taxa biologists call 'species.' And despite skepticism over the species category, there are pragmatic reasons for keeping the word 'species.' This approach to the species problem is not new. Darwin employed a similar strategy to the species problem 150 years ago.

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Rank-Free Monography: A Practical Example From the Moss Clade <I>Leucophanella</I> (Calymperaceae)

Cited by 17 publications

References 42 publications

Phylogeny as population history

Phylogeny as population history

Comparative Extraction of Chlorophylls in Selected Forest and Savanna Mosses Using Dimethylsulphoxide and Acetone

Darwin’s solution to the species problem

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