Multivariate analysis in process morphology of plants

Jeune, Bernard; Sattler, Rolf

doi:10.1016/s0022-5193(05)80670-8

Cited by 30 publications

(39 citation statements)

References 15 publications

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“…It is a very robust tool allowing the use of binary descriptors if the latter are presented as continuous ones by changing 0 to 0.1 and 1 to 1.1 as we did (see Jeune and Sattler 1992). This simplification is adequate since the PCA is used for descriptive purposes not for statistical inferences.…”

Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

The Study of Inuit Knowledge of Climate Change in Nunavik, Quebec: A Mixed Methods Approach

et al. 2015

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We address first, the lack of documented indigenous knowledge of climate change in Nunavik, Quebec, regarding impacts on plants; and second, the frequent underutilization of indigenous knowledge in decision making and policy. Our study of three communities indicates that there are similarities and contrasts among and within different areas of Nunavik that point to both general and localized impacts of climate change on Arctic communities. General trends include changes in berry and mammal distribution. Local trends include lower snow abundance, changing wind patterns and varying levels of impacts on travel and traditional activities. To assess these patterns, we used a novel mixed methods approach combining a qualitative analysis followed by a quantitative study of resulting codes and relevant quotes from interviewees. We believe this methodology can provide important insights into translating traditional knowledge into quantitative evidence for environmental policy and decisionmaking.

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Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

The Study of Inuit Knowledge of Climate Change in Nunavik, Quebec: A Mixed Methods Approach

et al. 2015

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“…Although empirical morphospaces can enhance our understanding of plant morphology, they do not include the totality of forms that characterize a theoretical morphospace. In the present analysis we will build a theoretical morphospace of plant organs based on a variety of modalities of growth (sensu Jeune and Sattler 1992), where it will be possible to calculate the morphological distance between them. In the context of a multifactorial analysis each form is assumed to consist of a shoot component, leaf component, and root component.…”

Section: Dynamic Morphology and Theoretical Morphologymentioning

confidence: 99%

“…This interpretation is based on the following principle discussed in detail by Lacroix et al (2005). If the limit between the categories of leaf and stem is arbitrary as stated by Sachs (1874, p.183), if processes are responsible for the elaboration of forms (Sattler 1994), and if there is a reiteration of the modalities of growth (in the sense of Jeune and Sattler 1992) common to leaves and stems (Lacroix et al 2003), it follows that the morphological unit is the shoot (i.e. leafy stem), an idea historically defended by C. de Candolle (1868) and later by Arber (1950).…”

Section: Introductionmentioning

confidence: 99%

Classical and dynamic morphology: toward a synthesis through the space of forms

2006

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In plant morphology, most structures of vascular plants can easily be assigned to pre-established organ categories. However, there are also intermediate structures that do not fit those categories associated with a classical approach to morphology. To integrate the diversity of forms in the same general framework, we constructed a theoretical morphospace based on a variety of modalities where it is possible to calculate the morphological distance between plant organs. This paper gives emphasis on shoot, leaf, leaflet and trichomes while ignoring the root. This will allow us to test the hypothesis that classical morphology (typology) and dynamic morphology occupy the same theoretical morphospace and the relationship between the two approaches remains a question of weighting of criteria. Our approach considers the shoot (i.e. leafy stem) as the basic morphological structural unit. A theoretical data table consisting of as many lines as there are possible combinations between different modalities of characters of a typical shoot was generated. By applying a principal components analysis (PCA) to these data it is possible to define a theoretical morphospace of shoots. Typical morphological elements (shoots, leaves, trichomes) and atypical structures (phylloclades, cladodes) including particular cases representing 'exotic' structures such as the epiphyllous appendages of Begonia and 'water shoot' and 'leaf' of aquatic Utricularia were placed in the morphospace. The more an organ differs from a typical shoot, the further away it will be from the barycentre of shoots. By giving a higher weight to variables used in classical typology, the different organ categories appear to be separate, as expected. If we do not make any particular arbitrary choice in terms of character weighting, as it is the case in the context of dynamic morphology, the clear separation between organs is replaced by a continuum. Contrary to typical structures, "intermediate" structures are only compatible with a dynamic morphology approach whether they are placed in the morphospace based on a ponderation compatible with typology or dynamic morphology. The difference in points of view between typology and continuum leads to a particular mode of weighting. By using an equal weighting of characters, contradictions due to the ponderation of characters are avoided, and the morphological concepts of continuum' and 'typology' appear as sub-classes of 'process' or 'dynamic morphology'.

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“…Today this fuzziness can be studied in a quantitative fashion through fuzzy logic (see e.g. Jeune and Sattler, 1992;Kosko, 1993). The importance of this logic is not yet sufficiently recognized.…”

Section: Wholeness and Part-whole Relationsmentioning

confidence: 99%

Some Comments on the Morphological, Scientific, Philosophical and Spiritual Significance of Agnes Arber's Life and Work

Sattler¹

2001

Annals of Botany

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Multivariate analysis in process morphology of plants

Cited by 30 publications

References 15 publications

The Study of Inuit Knowledge of Climate Change in Nunavik, Quebec: A Mixed Methods Approach

The Study of Inuit Knowledge of Climate Change in Nunavik, Quebec: A Mixed Methods Approach

Classical and dynamic morphology: toward a synthesis through the space of forms

Some Comments on the Morphological, Scientific, Philosophical and Spiritual Significance of Agnes Arber's Life and Work

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