An Ecological Distribution Akin to Fisher's Logarithmic Distribution

Red alga species belonging to the Porphyra and Pyropia genera (commonly known as Nori), which are widely consumed and commercialized due to their high nutritional value. These species have a carotenoid profile dominated by xanthophylls, mostly lutein and zeaxanthin, which have relevant benefits for human health. The effects of different abiotic factors on xanthophyll synthesis in these species have been scarcely studied, despite their health benefits. The objectives of this study were (i) to identify the abiotic factors that enhance the synthesis of xanthophylls in Porphyra/Pyropia species by conducting a systematic review and meta-analysis of the xanthophyll content found in the literature, and (ii) to recommend a culture method that would allow a significant accumulation of these compounds in the biomass of these species. The results show that salinity significantly affected the content of total carotenoids and led to higher values under hypersaline conditions (70,247.91 µg/g dm at 55 psu). For lutein and zeaxanthin, the wavelength treatment caused significant differences between the basal and maximum content (4.16–23.47 µg/g dm). Additionally, in Pyropia spp., the total carotenoids were considerably higher than in Porphyra spp.; however, the lutein and zeaxanthin contents were lower. We discuss the specific conditions for each treatment and the relation to the ecological distribution of these species.

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Ecological distribution and potential roles of Woesearchaeota in anaerobic biogeochemical cycling unveiled by genomic analysis

Computational and Structural Biotechnology Journal ◽

10.1016/j.csbj.2021.01.013 ◽

2021 ◽

Vol 19 ◽

pp. 794-800

Author(s):

Xiaobo Liu ◽

Yali Wang ◽

Ji-Dong Gu

Keyword(s):

Genomic Analysis ◽

Biogeochemical Cycling ◽

Ecological Distribution

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A systematic revision of Capparaceae and Cleomaceae in Egypt: an evaluation of the generic delimitations of Capparis and Cleome using ecological and genetic diversity

Journal of Genetic Engineering and Biotechnology ◽

10.1186/s43141-020-00069-z ◽

2020 ◽

Vol 18 (1) ◽

Author(s):

Mohamed Abd. S. El zayat ◽

Mahmoud El Sayd Ali ◽

Mohamed Hamdy Amar

Keyword(s):

Genetic Diversity ◽

Morphological Characteristics ◽

Systematic Position ◽

Diversity Analysis ◽

Polymorphic Markers ◽

Ecological Distribution ◽

Specific Group ◽

Systematic Revision ◽

Dna Evidence ◽

The Family

Abstract Background The Capparaceae family is commonly recognized as a caper, while Cleomaceae represents one of small flowering family within the order Brassicales. Earlier, Cleomaceae was included in the family Capparaceae; then, it was moved to a distinct family after DNA evidence. Variation in habits and a bewildering array of floral and fruit forms contributed to making Capparaceae a “trash-basket” family in which many unrelated plants were placed. Indeed, family Capparaceae and Cleomaceae are in clear need of more detailed systematic revision. Results Here, in the present study, the morphological characteristics and the ecological distribution as well as the genetic diversity analysis among the twelve species of both Capparaceae and Cleomaceae have been determined. The genetic analysis has been checked using 15 ISSR, 30 SRAP, and 18 ISTR to assess the systematic knots between the two families. In order to detect the molecular phylogeny, a comparative analysis of the three markers was performed based on the exposure of discriminating capacity, efficiency, and phylogenetic heatmap. Our results indicated that there is a morphological and ecological variation between the two families. Moreover, the molecular analysis confirmed that ISTR followed by SRAP markers has superior discriminating capacity for describing the genetic diversity and is able to simultaneously distinguish many polymorphic markers per reaction. Indeed, both the PCA and HCA data have drawn a successful annotation relationship in Capparaceae and Cleome species to evaluate whether the specific group sort individual or overlap groups. Conclusion The outcomes of the morphological and ecological characterization along with the genetic diversity indicated an insight solution thorny interspecies in Cleome and Gynandropsis genera as a distinct family (Cleomaceae) and the other genera (Capparis, Cadaba, Boscia, and Maerua) as Capparaceae. Finally, we recommended further studies to elucidate the systematic position of Dipterygium glaucum.

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Ecology and geography of hybridisation in British and Irish horsetails

Proceedings of the Royal Society of Edinburgh Section B Biological Sciences ◽

10.1017/s0269727000008228 ◽

1985 ◽

Vol 86 ◽

pp. 265-272

Author(s):

C. N. Page ◽

Marian A. Barker

Keyword(s):

Ecological Distribution ◽

Short Term ◽

Competing Species ◽

Relative Paucity ◽

Oceanic Climate ◽

Glacial Time

SynopsisHybridisation in Equisetum in Britain and Ireland is examined in respect of the exceptional numbers of hybrids present, their geographic and ecological distribution, their formation and subsequent spread.It is concluded that the moist oceanic climate and relative paucity of competing species in the British and Irish floras in post-glacial time have created uniquely favourable conditions for the formation and subsequent success of hybrid horsetails, promoting both the short-term persistence of weaker hybrids, and the extremly long-term persistence of others.The taxonomic inter-relations of parental combinations which have formed ecologically successful hybrids are discussed.

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Ecological Distribution of Cyclemys oldhamii (Gray, 1863) from Nepal

Our Nature ◽

10.3126/on.v2i1.317 ◽

1970 ◽

Vol 2 (1) ◽

pp. 7-12 ◽

Cited By ~ 2

Author(s):

Kalu Ram Rai

Keyword(s):

Habitat Loss ◽

Paddy Field ◽

Flood Plain ◽

Southern Slope ◽

Ecological Distribution ◽

Eupatorium Adenophorum ◽

Adult Specimen ◽

Juvenile Specimen ◽

River Valleys ◽

Ecological Habitats

Tangting River originates from southern slope of Murtidanda of Mahabharat range and forms a very narrow v-shaped agriculturally fertile valley in lower parts of Chure hills. It has three main tributaries merging from east and west. Water is clear with rocky bed and margin is covered with thick bushes of semi-shrubs (Eupatorium adenophorum). During the herpetological survey, a live juvenile specimen of Cyclemys oldhamii (Gray, 1983) was collected from the periphery of Banmare Khola, an eastern tributory of the river. It was found hiding in the paddy field in the flood plain of Tangting river (280 m), and another adult specimen was collected from Dhobi Khola (450 m), a western tributory of the river. Empty shells were also collected from Garuwa and Mai valleys, respectively. Tangting and Garuwa river valleys are the favourable habitats for Cyclemys oldhamii. The main reason of discontinued distribution is habitat loss by deforestation. Key words: Cyclemys, Morphology, Ecological habitats, Distributiondoi:10.3126/on.v2i1.317Our Nature (2004) 2: 7-12

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MIGRATION THROUGH SURNAMES IN CAMPOBASSO PROVINCE, ITALY

Journal of Biosocial Science ◽

10.1017/s0021932001003054 ◽

2001 ◽

Vol 33 (2) ◽

pp. 305-310 ◽

Cited By ~ 3

Author(s):

G. BIONDI ◽

P. RASPE ◽

C. G. N. MASCIE-TAYLOR

Keyword(s):

Sample Size ◽

Logarithmic Distribution ◽

Molise Region ◽

Female Marriage

Data on grandparental surnames were obtained from schoolchildren in 22 communes from Campobasso Province, Italy (Molise Region). The distribution of surnames was shown to be almost exactly linear by a log2–log2 transformation, which justified the fitting of the data to Fisher’s logarithmic distribution. The values for ν were higher among women. When ν was standardized to minimize bias due to sample size, the value was one-third the estimate of migration from exogamy data. The higher values of ν for females indicate that there is greater mobility of female marriage partners than males.

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Mesozoic micropalaeontology of exploration well Elf 55/30–1 from the Fasnet Basin, offshore southwest Ireland

Journal of Micropalaeontology ◽

10.1144/jm.5.1.19 ◽

1986 ◽

Vol 5 (1) ◽

pp. 19-29 ◽

Cited By ~ 12

Author(s):

Nigel R. Ainsworth ◽

Nicola F. Horton

Keyword(s):

Lower Cretaceous ◽

Lower Jurassic ◽

Late Triassic ◽

Ecological Distribution ◽

Exploration Well

Abstract. The geology, biostratigraphy and palaeoecology of exploration well Elf 55/30–1 in the Fastnet Basin are summarised. The biostratigraphical and ecological distribution of the foraminifera and Ostracoda from the late Triassic, the Lower Jurassic and the Lower Cretaceous are reviewed with reference to microfaunas elsewhere in Europe. Selected microfossil taxa are illustrated.

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