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bookmarks  88

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    Cactaceae family is an important plant of Arid and Semi-Arid Lands (ASALs) of the world. It is useful for ornamental (Cereus peruvianus and Thrixanthrocereus blossfeldiorum), food, fodder and industrial production (Opuntia spp.). The objective of this study was to characterize and determine the distribution of cactus species in two ASAL zones of Kenya (Rift Valley and Eastern).Sixty nine distinct populations of cactus were characterized in-situ using a list of descriptors by the International Union for the Protection of New Varieties of Plants (UPOV). Results indicated that eight species namely, Opuntia exaltata, Opuntia monacantha, Opuntia ficus-indica, Opuntia stricta, Thrixanthrocereus blossfeldiorum, Euphorbia abyssinica, Euphorbia ingens and Cereus peruvianus were present in Kenya. Opuntia ficus-indica was the most diverse and was found in four of the five counties studied. Euphorbia abyssinica was found in four counties while Opuntia stricta and Thrixanthrocereus blossfeldiorum were found in a single county each. The results revealed morphologically a significant diversity among cactus species in Kenya. Further research is needed through molecular characterization and to cover the entire country to identify other species available in these areas and their mode of distribution as well as their productivity to influence the choice species for utilization.
    20 days ago by @mdashikurr
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    This study describes the relationship of the natural wetland habitats in Agusan Marsh to nearby rice fields and its implication to ecological rice production. Aquatic insects play multiple roles in the ecosystem such as predators, prey to other animals and decomposers which help in maintaining ecological balance. Results revealed that the diversity of odonates was highest in the sedge-dominated swamp among natural habitats which corresponds to the adjoining ricefields. The pattern of clustering of odonates show 3 groups; the rice-sago and rice-sedges sub-cluster, the rice-bangkal, rice-Terminalia, rice-fern, bangkal, sago and sedges sub-cluster, and the Terminalia forest as the outlier. The diversity of semi-aquatic and aquatic bugs was highest in the Bangkal forest while the lowest was in the fern-dominated swamp. The pattern of clustering shows 2 sub-clusters and the outlier Bangkal forest. On aquatic beetles, highest diversity was in the Terminalia forest. The sub-cluster consists of Terminalia habitat and rice-fern, while the other sub-cluster includes rice-Bangkal and rice-Terminalia. The resulting patterns of similarity in diversity and distribution of species in natural habitats and nearby ricefields indicate that ricefields are important temporary habitats for some aquatic insect species and serve as stepping stones for the movement of the insects.
    a month ago by @mdashikurr
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    Biodiversity composition and usage is fundamental to human existence. We aim in this study to: profile and estimate woody species diversity, identify their preferences, uses and assess local communities’ perception on species dominance, density, disturbance and options for biodiversity management. The research employed quantitative and qualitative survey methods. Semi-structured questionnaires, interviews and focus group discussions were used for data collection. Stratified random sampling aided selection of study plots using 10m × 10m quadrat in four major LUs. The Sorenson index aided species similarity levels assessment. Family Importance Value used to determine most important plant families. The Shannon-Weiner Diversity and Evenness index were used to determine species diversity and evenness. Pearson Correlation Coefficient helped establish correlation among dominant, preferred, disturbed species. A total of 66 woody plant species belonging to 26 families and 54 genera were identified. Trend of high species diversity was found in; sacred groves followed by fallow fields, grazed open fields and cultivated fields. Reduction in species densities over the last decade was widely cited as reasons for this trend. Strong significant differences between dominant and preferred species were observed in Kpalgun (r=0.92, p<0.01), Cheshegu (r=0.90, p<0.01), Zagua (r=0.89, p<0.01), Daboshie (r=0.98, p<0.01) and Fihini (r=0.79, p<0.01). Most common species uses are food, fuel, income, medicine and construction. In Tolon district, biodiversity management is through enforcement of traditional norms and taboos; though bush fires and species exploitation affect sustainable biodiversity management. The study highlights rarity and commonness of plant species distribution in rarely assessed Savannah Ecological zone.
    2 months ago by @mdashikurr
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    This research was conducted to investigate the plant species diversity in the protected and non-protected sites via comparison of biodiversity and similarity indices. The research area comprised a coastal system in the north of Guilan Province, Iran. Vegetation sampling was carried out along 16 shore perpendicular transects, approximately 500-m long. A total of 50 plot of 25 square meters were taken in transects. In each sampled plot, the cover percentage value of each species was estimated using Bran-Blanquet scales. Data analysis was carried out using diversity numerical indices of richness, diversity and evenness index. To assess the significance of numerical measures a student’s t-test was used. The similarity index was selected for clarifying the species similarities between two sites. Graphs of Rainey parameterise diversity indices and species abundant model were plotted. The results showed species diversity in two compared area was very close together based on numerical indices. Data analysis by species abundant models was fitted to geometry model. Result showed conservation devices could not be effective and helpful tool for biological diversity maintenance and progress.
    2 months ago by @mdashikurr
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    The suspended algal life forms (SALF) were studied in the high altitude rice fields (WRF) covering five randomly selected sites of Apatani Plateau in Arunachal Pradesh, India. The samples were collected fortnightly from WRF in three inundated phases viz. water accumulation (April- May), flooding (June-July) and early recession (August –September) during the rice growing season of 2013. A total of 62 taxa of SALF belonging to the classes Chlorophyceae, Bacillariophyceae and Cyanophyceae were recorded. Closterium sp., Spondylosium sp., Scenedesmus sp., Ulothrix sp., Zygnema sp., Spirogyra sp., Docidium sp. of Chlorophyceae, Navicula sp., Pinnularia sp., Rhizosolenia sp., Tabellaria sp. of Bacillariophyceae and Oscillatoria sp., Nostoc sp., Phormidium sp. of Cyanophyceae were in high abundance in WRF. The study also revealed that Chlorophyceae was the most dominant and diverse class of SALF followed by Bacillariophyceae and Cyanophyceae which was ensued for concurrent existence of rice stems as the affixing substrate of attached algal life forms (AALF) in WRF.
    2 months ago by @mdashikurr
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    A field experiment was conducted at Central Research Farm, Hajee Mohammad Danesh Science and Technology University, Dinajpur with 12 wheat genotypes collected WRC (Wheat Research Center), Dinajpur during 2013-2014 to study their variability and select genotypes for improvement of wheat. There was significant variation for all the 13 characters studied indicating the presence of considerable variations for selection. All the genotypes were earlier in heading than Agrani. Heading days (HD), plant/ m2 (PPM), spikelet per spike (SPS) and 1000 grains weight (TGW) exhibited high heritability coupled with a moderate genetic advance. These characters had also medium to high genotypic coefficient of variation and phenotypic coefficient of variation coupled with high to moderate heritability and genetic advance. So, selection on the basis of these characters. Grain yield had positive and highly significant association with heading days, maturity days and 1000 grains weight at both genotypic and phenotypic levels. Grains per spike exhibited significantly negative association with grain yield per hectare. These results suggested that use of these traits in selecting high yielding genotypes would bring out good results and supplement empirical breeding approach.
    2 months ago by @mdashikurr
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    Morales beach is one of the beaches located in the coastal town of Glan, Sarangani Province and noted for its quite enormous coral reef which is continuously degrading. This study was conducted to assess the health status of coral reef ecosystem and to evaluate the physico-chemical parameters of the area. Point Intercept Transect (PIT) method was used to monitor live coral condition and the supporting fauna at a coral reef ecosystem. Physico-chemical parameters were obtained in situ using a thermometer, refractometer, and a pH meter. The result of the study showed a very low percentage cover of hard corals, no cover percentage of soft corals and high cover percentage of other biota or substrate. The reef areas exhibited poor coral cover with an average of 15 percent live hard corals having family Acropora as the most dominant species (Shannon diversity index of 1.653). Water samples obtained were within the DENR (1990) standards suitable for the optimum growth of coral reefs. The health status of the coral reefs in Morales beach showed a partially disturbed reef due to human intervention. It is greatly recommended to constantly monitor the coral conditions in order to effectively manage and protect the increasing number of Marine Protected Areas (MPA).
    2 months ago by @mdashikurr
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    Lepidoptera is probably one of the most suitable groups for most quantitative comparisons especially their abundance and species richness. Moths were found to be a potentially useful indicator of biodiversity. The main objective of the study was to assess biodiversity health of conifer forests by using moths as indicator species. Quantitative estimates of species diversity, evenness and richness in different locations were made. Noctuid moths were collected from different parts of Himachal Pradesh during 2012-2014. A total number of 1348 noctuid moth specimens were collected by using light traps. During the study, a total of 103 species were collected from five different conifer forest spread over 10 localities of Himachal Pradesh. Regarding different forests it was found that maximum species diversity was found in year 2014 (3.22), followed by 2013 (2.97) and finally 2012 (2.80); maximum species evenness was found in the year 2014 (2.12), followed by year 2012 (2.08) and finally 2013 (1.99); maximum species richness was found in year 2014 (16.25), followed by 2013 (15.37) and finally 2012 (13.9). Regarding different localities, it was found that year 2014 showed maximum values with Species diversity: 2.65; Species evenness: 2.11; Species richness: 10.24 followed by year 2013 with Species diversity: 2.54; Species evenness: 2.08; Species richness: 8.72 and then 2012 with Species diversity: 2.03; Species evenness: 1.69; Species richness: 8.26. The rich abundance in Chirpine forest was due to diversified fruit crop ecosystem. In this experimental finding conclude that species found in Chirpine forest predict immediate protective measures to conserve forest ecosystem.
    4 months ago by @mdashikurr
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    A major part of the human di et al over the world consists of cereals and legumes. Legumes are however, considered as the major source of protein and dietary amino acid for man and farm animals. The detailed evolutionary relations and cluster analysis in this group of plants may help in further manipulations and modifications of plants leading to enhanced nutritional supplementation for consumption. To estimatethe picture of genetic diversity in lentil (Lens culinaris)the proteomics assay was carried out. A total of 60 cultivars were collected from 60 lentil growing areas of Malakand Division Khyber Pakhtunkhwa, Pakistan. The obtained lines were biochemically evaluated for the purpose to check the genetic heterogeneity. Based on proteomics homology dendrogram and cluster plottingsorted 60 cultivars into 4 clusters i.e. Cluster-1 (sorted forty cultivars), cluster-2 (grouped single cultivar), cluster-3 (had seventeen genotypes) and cluster-4 (grouped two cultivars).Thirteen loci (bands) were spotted in the collected germplasm of lentils through SDS-PAGE. Intra species locus contribution toward genetic diversity (LCTGD) was 84.61. Out of thirteen loci, locus-1, 2, 3,4,5, 6,7,8, 9, 10 and 11 showed polymorphic.The results showed that SDS-PAGE displayed a low level Genetic polymorphism in our accessions but higher than in other legumes, and it can be increased by the addition of more extensively sourced germplasm.
    4 months ago by @mdashikurr
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    Gastropods have never been studied in Punjab, Pakistan with reference to its diversity and distribution. Different ecological factors have been studied which affect the distribution of the snail in the agroecosystem of this region. Total number of 19290 snails specimens, were collected from different cropland areas of 24 villages of Faisalabad including sugarcane, wheat, fodder, vegetables fields and ditches. The specimens were identified on the basis of recent identification keys and diagrammatic description provided in them to understand the biodiversity in this region. The diversity index was found highly significant in sugarcane, wheat, fodder, and vegetables fields however the results were non-significant in case of ditches. The relative abundance was maximum in sugarcane and least in ditches. The diversity index was significantly high in all months except in April whereas the relative abundance was maximum in July and August. It can be concluded that due to environmental degradation and water pollution the snail diversity is non significant, in ditches however in the agroecosystem it is a pest. It can be suggested that strategies must be developed to control water quality deterioration and its biological control as a pest.
    6 months ago by @mdashikurr
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    "There might be as many as 10,000 types of neuron, although the definition of neuronal type is debated"
    8 months ago by @bshanks
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    This publication, focused on what foundations should be doing in order to implement affirmative policies that actively foster inhouse diversity or address diversity in grant-making, underlines the level of commitment of the EFC (European Foundation Centre) to the necessary efforts towards the mainstreaming of migrants and people from ethnic minorities within foundations’ work.
    11 months ago by @erstefoundation
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    Tatort-Regisseure, Musiker bei Rock im Park, Elternzeit - Zahlen, die die Unterschiede zwischen Männern und Frauen zeigen.
    a year ago by @careercenteruhh
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    Diese psychologischen Prinzipien machen es Frauen im Job schwer. Wie sie funktionieren - und was dagegen hilft.
    a year ago by @careercenteruhh
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    "Wie viel Gleichberechtigung brauchen wir noch?" wollten unsere Leser wissen. Die SZ-Redaktion hat für Sie recherchiert.
    a year ago by @careercenteruhh
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    zur Entstehung des Stereotyps sozial inkompatibler, männlicher Programmierer
    a year ago by @continued
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    We describe a collaborative project in which university researchers, teachers and Grade 4–5 English language learners (ELLs) investigated the sociohistorical contexts and practices in which the ELLs participate, through a ‘community scan’. Many observers have argued that schools and teachers have such minimal knowledge of the outside- school lives of their multilingual and multicultural students that they are unable to build upon the ‘funds of knowledge’ that students and other members of their communities have. In particular, a large body of recent literature argues that school literacy education should be linked to literacies that children develop in their homes and communities. We present here a study centred on a public school located in a Canadian Punjabi-Sikh community. For our scan we collected census and other demographic representations of the community, as well as media reports and academic literature concerned with Punjabi-Sikh immigration. In addition, our scan included interviews with teachers, principals, parents and community leaders. Students’ investigations and representations of the community and of out-of-school multiliteracies were also collected. The authors argue that such information is crucial in the development of pedagogy that values and promotes the reworking of the practices, images, texts and symbols that children already use.
    a year ago by @umatadema
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    In this paper we look at three identity positions salient in research of young people studying in complementary schools in Leicester, a large linguistically and ethnically diverse city in the East Midlands, England. Our discussion of identity focuses on three identity positions: multicultural, heritage and learner. The first two of these are linked to discussions on ethnicity as a social category. We explore the fluidity and stability of ethnicity as a social description in interview transcripts of young people at complementary schools. In addition, the paper explores another, more emergent identity salient in the two schools, that of ‘learner identity’. The research can be characterised as adopting a linguistic ethnographic approach using a team of ethnographers. Data was collected for 20 weeks by four researchers and consists of fieldnotes, interviews and audio recordings of classroom interactions. We consider the importance of ambiguity and certainty in students’ conceptualisation of themselves around ethnicity and linguistic diversity and look at the institutional role complementary schools play in the production of these and successful learner identities. We explore how complementary schools privilege and encourage these particular identity positionings in their endorsement of flexible bilingualism. Overall, we argue that complementary schools allowed the children a safe haven for exploring ethnic and linguistic identities while producing opportunities for performing successful learner identity. Published (publisher's copy) Peer Reviewed
    a year ago by @umatadema
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publications  213