1,720,972 research outputs found
Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam
No full textMatthews, Peter J., Nguyen, Van Du, Fang, Qiong, Long, Chun-Lin (2022): Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam. Phytotaxa 541 (1): 1-9, DOI: 10.11646/phytotaxa.541.1.1, URL: http://dx.doi.org/10.11646/phytotaxa.541.1.
FIGURE 4. A in Pinellia hunanensis (Araceae), a new species supported by morphometric analysis and DNA barcoding
No full textFIGURE 4. A classification tree of combined rbcL and matK data using neighbor-joining (NJ) and Bayesian of phylogenetic methods.Published as part of Liu, Yu-Jing, Newmaster, Steven G., Wu, Xian-Jin, Liu, Yue, Ragupathy, Subramanyam, Motley, Timothy & Long, Chun-Lin, 2013, Pinellia hunanensis (Araceae), a new species supported by morphometric analysis and DNA barcoding, pp. 1-13 in Phytotaxa 130 (1) on page 11, DOI: 10.11646/phytotaxa.130.1.1, http://zenodo.org/record/508572
FIGURE. Stem, roots, and buds of C. spongifolia. A. Cross section of stem in B, showing clear, gummy exudate. B. Mature stem with decumbent part at left, erect part at right, roots and rootlets, brown leaf scars, and single adaxial buds (arrows). C. Young stem, with single, adaxial bud revealed. Scale bars = 2 cm (Bach Ma NP, 2018, 2021). Photos: NVD and PJM. in Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam
No full textFIGURE. Stem, roots, and buds of C. spongifolia. A. Cross section of stem in B, showing clear, gummy exudate. B. Mature stem with decumbent part at left, erect part at right, roots and rootlets, brown leaf scars, and single adaxial buds (arrows). C. Young stem, with single, adaxial bud revealed. Scale bars = 2 cm (Bach Ma NP, 2018, 2021). Photos: NVD and PJM.Published as part of Matthews, Peter J., Nguyen, Van Du, Fang, Qiong & Long, Chun-Lin, 2022, Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam, pp. 1-9 in Phytotaxa 541 (1) on page 2, DOI: 10.11646/phytotaxa.541.1.1, http://zenodo.org/record/637509
FIGURE 2. Pinellia hunanensis—A in Pinellia hunanensis (Araceae), a new species supported by morphometric analysis and DNA barcoding
No full textFIGURE 2. Pinellia hunanensis—A: habit; B: juvenile plant; C: leaf; D: inflorescence; E: spadix; F: infructescence; G: pistil; H: fruit; I: seed (Drawn after the holotype by Yitao Liu).Published as part of Liu, Yu-Jing, Newmaster, Steven G., Wu, Xian-Jin, Liu, Yue, Ragupathy, Subramanyam, Motley, Timothy & Long, Chun-Lin, 2013, Pinellia hunanensis (Araceae), a new species supported by morphometric analysis and DNA barcoding, pp. 1-13 in Phytotaxa 130 (1) on page 10, DOI: 10.11646/phytotaxa.130.1.1, http://zenodo.org/record/508572
FIGURE 5 in Pinellia hunanensis (Araceae), a new species supported by morphometric analysis and DNA barcoding
No full textFIGURE 5. Scatter plot of the first two axes from a detrended correspondence analysis (DCA) for 38 quantitative morphological variables (taxonomic characters) of 24 specimens (classification of 6 Pinellia species). The new species Pinellia hunanensis is circled, including its respective intraspecific variation.Published as part of Liu, Yu-Jing, Newmaster, Steven G., Wu, Xian-Jin, Liu, Yue, Ragupathy, Subramanyam, Motley, Timothy & Long, Chun-Lin, 2013, Pinellia hunanensis (Araceae), a new species supported by morphometric analysis and DNA barcoding, pp. 1-13 in Phytotaxa 130 (1) on page 12, DOI: 10.11646/phytotaxa.130.1.1, http://zenodo.org/record/508572
FIGURE. Blades of C. spongifolia. A. Sub-marginal and marginal collective veins, with laminal tissue (2–4 mm) between. B. Marginal collective veins fused below shallow sinus. C. Underside with spongy appearance produced by "false pores"; and thick, rubbery texture indicated by axial wrinkles formed in crease. D. Underside showing primary vein and pinnate lateral veins surrounded by spongy tissue. E. Sub-stomatal cavities revealed by transmitted light (scale unit 0.25 mm), F. Sub-stomatal cavities revealed by removing lower epidermis (A–D: Mengla County, 2018. E–F: Bach Ma NP seedling, ex situ). Photos: PJM. in Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam
No full textFIGURE. Blades of C. spongifolia. A. Sub-marginal and marginal collective veins, with laminal tissue (2–4 mm) between. B. Marginal collective veins fused below shallow sinus. C. Underside with spongy appearance produced by "false pores"; and thick, rubbery texture indicated by axial wrinkles formed in crease. D. Underside showing primary vein and pinnate lateral veins surrounded by spongy tissue. E. Sub-stomatal cavities revealed by transmitted light (scale unit 0.25 mm), F. Sub-stomatal cavities revealed by removing lower epidermis (A–D: Mengla County, 2018. E–F: Bach Ma NP seedling, ex situ). Photos: PJM.Published as part of Matthews, Peter J., Nguyen, Van Du, Fang, Qiong & Long, Chun-Lin, 2022, Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam, pp. 1-9 in Phytotaxa 541 (1) on page 4, DOI: 10.11646/phytotaxa.541.1.1, http://zenodo.org/record/637509
FIGURE. Fruiting heads and peduncles of C. spongifolia. A. Site WP260; two peduncles have lost heads (arrows 1 and 2), the upper part (male zone) of one spadix lies on ground (arrow 3), and six attached heads all touch ground. B–E. Site WP251; a single, detached immature head with bite marks in upper and lower ends, and torn surface at junction with peduncle (at left in D–E). Scale bars: 10 cm with 1 cm units (main image); 8 cm with 2 cm units (lower right); B–C enlarged, without scale. (Bach Ma NP, 2018). Photos: PJM. in Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam
No full textFIGURE. Fruiting heads and peduncles of C. spongifolia. A. Site WP260; two peduncles have lost heads (arrows 1 and 2), the upper part (male zone) of one spadix lies on ground (arrow 3), and six attached heads all touch ground. B–E. Site WP251; a single, detached immature head with bite marks in upper and lower ends, and torn surface at junction with peduncle (at left in D–E). Scale bars: 10 cm with 1 cm units (main image); 8 cm with 2 cm units (lower right); B–C enlarged, without scale. (Bach Ma NP, 2018). Photos: PJM.Published as part of Matthews, Peter J., Nguyen, Van Du, Fang, Qiong & Long, Chun-Lin, 2022, Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam, pp. 1-9 in Phytotaxa 541 (1) on page 5, DOI: 10.11646/phytotaxa.541.1.1, http://zenodo.org/record/637509
Biodiversity Research for Sustainable Development: Can It Be Achieved?
Full text linkBiodiversity is said to be the "heart of sustainable agricultural systems". Biodiversity research is envisioned to provide a better understanding of development issues so that better policy responses, management practices and actions will ultimately redound to a better quality of life for all, especially the poor. It is in this light that the Philippines-Netherlands Biodiversity Research Programme for Development is revisited and analyzed in this paper. This and other similar projects provide lessons for capacity development at the community, national, regional and international levels. To proceed with its analysis, the paper fleshes out the framework of sustainable development, situating the role of biodiversity in determining the pathway of development. As shown, biodiversity, as an element of the natural resource base, and in concert with technology and sociocultural factors, will continue to be relevant in a rapidly changing and increasingly globalized world. It also presents the sustainable livelihood framework to illustrate that biodiversity alone, being only one component of natural capital, cannot alleviate poverty if nothing is done with the other capital assets. One important lesson gleaned from the analysis of biodiversity research is that not all biodiversity is good. The key is to better understand the interactions between various levels and how these can be harnessed into positive interactions to produce a productive, stable and sustainable resource base. Another emerging lesson is that biodiversity can be conserved in agroecosystems if the poor resource users can be enabled to use it to improve their assets in the context of the sustainable livelihood framework. The effective management and conservation of agricultural biodiversity can be achieved through product value addition and link to market, germplasm enhancement, and participatory plant breeding, among others.biodiversity, sustainable development, agroecosystems
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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