selection of species
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Author(s):  
Katarzyna Blitek ◽  
Daniel Pruchniewicz ◽  
Przemysław Bąbelewski ◽  
Marta Czaplicka-Pędzich ◽  
Marcin Kubus

The selection of species which show the highest possible tolerance to negative habitat conditions, also among plants of foreign origin, is a pressing issue. One of the species we would like to recommend for planting in urban areas is the white mulberry species (Morus alba) due to both its outstanding adaptability and its ecosystem services. There are no reliable studies on the distribution of this species in urbanized areas in Poland, nor sufficient analyses of the methods of its renewal, both deliberate and spontaneous spread through self-seeding. Collecting data on the population of an alien species within individual regions and forecasting potential changes in the population’s size and structure, as well as its possible impacts on other organisms, is one of the basic measures to reduce biological invasions, which is one of the six priority objectives of the European Biodiversity Strategy and an element of the Strategy on Invasive Alien Species. The aim of this study was to determine the size and structure of the white mulberry population in the city of Wrocław and to analyse the relationship between this structure and intensity of anthropopressure and thermal conditions.


Silica sand mining in Shankargarh, Prayagraj, India area has led to extensive ecological destruction, environmental degradation and erosion of traditional values in the society. Therefore, an integrated organic and socioeconomic approach is urgently required to bioreclaim degraded mine sites.The most common problems linked with degraded land rehabilitation failures are frequently associated with improper selection of plantation species. Subsistence utility preferences of local people are major acclaimed and convincing reasons in the selection of valuable tree species for Bioreclamation. Socioeconomic Survey were carried out in the nearby villages of Silica mining area to study the existing resources of the area, social structure of the community, dependence on forest and species preferred by the local people. Consequently, a Utility Value Index (UVI) framework was conceptualized, designed and subsequently developed to identify species preferred by the local people and highly valued for supporting their livelihood.


Water ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 53
Author(s):  
Jie Qin ◽  
Jianhua Si ◽  
Bing Jia ◽  
Chunyan Zhao ◽  
Dongmeng Zhou ◽  
...  

The sparse natural vegetation develops special water use characteristics to adapt to inhospitable desert areas. The water use characteristics of such plants in desert areas are not yet completely understood. In this study, we compare the differences in water use characteristics between two dominant species of the Badain Jaran Desert mega-dunes—Zygophyllum xanthoxylum and Artemisia ordosica—by investigating δ2H and δ18O in plant xylem (the organization that transports water and inorganic salts in plant stems) and soil water, and δ13C in plant leaves. The results indicate that Z. xanthoxylum absorbed 86.5% of its water from soil layers below 90 cm during growing seasons, while A. ordosica derived 79.90% of its water from the 0–120 cm soil layers during growing seasons. Furthermore, the long-term leaf-level water use efficiency of A. ordosica (123.17 ± 2.13 μmol/mol) was higher than that of Z. xanthoxylum (97.36 ± 1.16 μmol/mol). The differences in water use between the two studied species were mainly found to relate to their root distribution characteristics. A better understanding of the water use characteristics of plants in desert habitats can provide a theoretical basis to assist in the selection of species for artificial vegetation restoration in arid areas.


2021 ◽  
Author(s):  
Y. Shirnin ◽  
I. Gaisin ◽  
A. Shirnin ◽  
D. Shamov

A critical analysis of scientific publications devoted to the schemes and parameters of placement (planting) on the territory of the plantation of planting material is presented. The analysis of the dimensions of the machines and their working bodies in comparison with the options for planting plantation plantings is presented. Possible systems of machines for selective logging on forest plantations are recommended, which ensure felling of trees without damage to the stand left for re-growth. A scheme for growing and harvesting timber on plantations has been developed and justified. The main parameter that affects the effective growth of crops is the density of the stand. Its regulation is directed to the proposed options for thinning. The main parameters that should be taken into account when predicting the characteristics of the stand left for rearing are presented. Requirements for the technology of logging on plantations have been developed to minimize the damage to the individuals left for rearing. Recommendations on the selection of species for growing on the plantation, as well as machine systems for cutting operations, taking into account the geometric parameters of stands for different periods of logging, are proposed. Recommendations are given on the technological schemes for the development of apiaries during logging under specified conditions with the achievement of the goals set by the recommended machine systems.


Automatica ◽  
2021 ◽  
Vol 132 ◽  
pp. 109804
Author(s):  
Walid Djema ◽  
Laetitia Giraldi ◽  
Sofya Maslovskaya ◽  
Olivier Bernard

Botany ◽  
2021 ◽  
Author(s):  
Alexandra Kachura ◽  
Cory Steven Harris

The Asteraceae is the largest family of plants in North America and widely used as medicine by Indigenous peoples. This study investigated the medicinal ethnobotany of North American Asteraceae to identify taxa that appear preferentially selected or avoided for general and specific medicinal uses. Asteraceae-specific ethnobotanical reports recorded in the Native American Ethnobotany Database were compiled and, using residual and binomial analyses, 14 tribes were compared and ranked as either over- or under-selected for medicine, food or technology, and for different categories of medicinal applications. Statistical analysis supported the hypothesis that selection of species for ethnobotanical purposes is non-random and does not depend on the size of the flora. The Anthemideae tribe was identified as over-selected for all types of applications, including most therapeutic categories, most significantly as pulmonary and orthopedic aids. Subsequent analysis revealed that the over-representation of this tribe was attributed mainly to Achillea millefolium and Artemisia spp.. The significance of Anthemideae, particularly of Achillea and Artemisia species, as highly-selected medicinal taxa emphasizes their cultural importance to Indigenous North Americans. Residual and binomial statistics generally provided parallel results but supplementary statistical methods, more in-depth investigation of other use categories, and inclusion of plant distribution data may provide greater insight into traditional uses of Asteraceae in North America.


2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Tinsae Bahru ◽  
Berhane Kidane ◽  
Amsalu Tolessa

Abstract Background In Ethiopia, about 92.3% of all the fuelwood (firewood and/or charcoal) is consumed for cooking, heating and lighting purposes by domestic households and the demand is growing from 10 to 14%. However, there are little/no practical experiences or documented indigenous knowledge on how traditional people identify and select high fuelwood producing plant species with short rotation periods at Boset District. Therefore, the present study was aimed at: (1) selecting and documenting high fuelwood producing plant species at Boset District; (2) identifying major predictor variables that influence the prioritization and selection of species; and (3) develop a Generalized Linear Model (GLM) to predict the selection of species. Methods A total of 96 informants comprising 59 men and 37 women between the ages of 18 and 81 were sampled. Data were collected using structured interviews, guided field walk, discussions and field observations. Results Collected data indicated that 88.5% of the informants involved in firewood collection, while 90% practiced charcoal making. A total of 1533.60 Birr per household on average was earned annually from this activity. A total of 25 fuelwood producing plant species were identified and documented at Boset District. Of these, Acacia senegal, Acacia tortilis and Acacia robusta were the three best prioritized and selected indigenous high fuelwood producing species. Prosopis juliflora, Parthenium hysterophorus, Azadirachta indica, Calotropis procera, Cryptostegia grandiflora, Lantana camara and Senna occidentalis further grouped under introduced fuelwood species. Prediction of GLM assured sampled Kebeles and source of income generated from fuelwood species positively and significantly (p < 0.001) related to selection of species. Higher efficiency to provide energy and heat; little or no smoke or soot; easier to cut and split the wood and easier availability were some of the main selection criteria. Conclusions This study provides valuable information in selecting and documenting of high fuelwood producing plant species for proper management and sustainable use at Boset District. The three most selected species (A. senegal, A. tortilis and A. robusta) should be further evaluated at laboratory to determine their calorific value and combustion characteristics.


2021 ◽  
Author(s):  
Manish Tiwari ◽  
Monika Sodhi ◽  
Preeti Verma ◽  
Prince Vivek ◽  
Ranjit S Kataria ◽  
...  

Abstract The identification of appropriate references genes is an integral component of any gene expression-based study for getting accuracy and reliability in data interpretation. In this study, we evaluated the expression stability of 10 candidate reference genes (GAPDH, RPL4, EEF1A1, RPS9, HPRT1, UXT, RPS23, B2M, RPS15, ACTB) in peripheral blood mononuclear cells of livestock species that are adapted to high altitude hypoxia conditions of Leh-Ladakh. A total of 37 PBMCs samples from six native livestock species of leh-Ladakh region such as Ladakhi cattle (LAC), Ladakhi yak (LAY), Ladakhi donkey (LAD), Chanthangi goat (CHG), Double hump cattle (DHC) and Zanskar ponies (ZAP) were included in this study. The commonly used statistical algorithms such as geNorm, NormFinder, BestKeeper and RefFinder were employed to assess the stability of these RGs in all the livestock species. Our study has identified different panel of reference genes in each species; for example, EEF1A1, RPL4 in Ladakhi cattle; GAPDH, RPS9, ACTB in Ladakhi yak; HPRT1, B2M, ACTB in Ladakhi donkey; HPRT1, B2M, ACTB in Double hump camel, RPS9, HPRT1 in Changthangi goat, HPRT1 and ACTB in Zanskar ponies. To the best of our knowledge, this is the first systematic attempt to identify panel of RGs across different livestock species types adapted to high altitude hypoxia conditions. In future, the findings of the present study would be quite helpful in conducting any transcriptional studies to understand the molecular basis of high altitude adaptation of native livestock population of Leh-Ladakh.


2021 ◽  
Author(s):  
Pascal Laffargue ◽  
Damien Delaunay ◽  
Vincent Badts ◽  
Olivier Berthele ◽  
Anne-Sophie Cornou ◽  
...  

Abstract. The demersal fish and cephalopod communities of the continental shelves of the Bay of Biscay and the Celtic Sea have been monitored for more than 30 years by the EVHOE series of fisheries surveys. Since 1987, a total of 4247 stations have been sampled in the fall with a GOV bottom trawl in a depth range of 15 to 600 m. The main objective of these surveys is to monitor 22 benthic fish stocks and 10 cephalopods but also to provide a description of the distribution of a total of 250 fish and 50 commercial invertebrate taxa. The dataset (https://doi.org/10.17882/80041) provides abundance and biomass information by station for all observed taxa. Size distributions for a selection of species are also available. These data are part of a larger set of standardized European surveys that provide essential information for monitoring demersal communities in the Northeast Atlantic. We propose here a critical analysis of the dataset especially in terms of the evolution of the sampling effort and strategy as well as the taxonomic precision.


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