Climatic conditions and human activities shape diploid–tetraploid coexistence at different spatial scales in the common weed Tripleurospermum inodorum (Asteraceae)

2019 ◽  
Author(s):  
Martin Čertner ◽  
Pavel Kúr ◽  
Filip Kolář ◽  
Jan Suda
Keyword(s):  
Human Activities ◽  
Spatial Scales ◽  
Climatic Conditions ◽  
The Common

scholarly journals The effects of ENSO, climate change and human activities on the water level of Lake Toba, Indonesia: a critical literature review

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Hendri Irwandi ◽  
Mohammad Syamsu Rosid ◽  
Terry Mart
Keyword(s):  
Climate Change ◽  
Water Level ◽  
Human Activities ◽  
Southern Oscillation ◽  
Climatic Conditions ◽  
Water Levels ◽  
Dominant Factor ◽  
Climate Projections ◽  
Continuous Increase ◽  
The Future

AbstractThis research quantitatively and qualitatively analyzes the factors responsible for the water level variations in Lake Toba, North Sumatra Province, Indonesia. According to several studies carried out from 1993 to 2020, changes in the water level were associated with climate variability, climate change, and human activities. Furthermore, these studies stated that reduced rainfall during the rainy season due to the El Niño Southern Oscillation (ENSO) and the continuous increase in the maximum and average temperatures were some of the effects of climate change in the Lake Toba catchment area. Additionally, human interventions such as industrial activities, population growth, and damage to the surrounding environment of the Lake Toba watershed had significant impacts in terms of decreasing the water level. However, these studies were unable to determine the factor that had the most significant effect, although studies on other lakes worldwide have shown these factors are the main causes of fluctuations or decreases in water levels. A simulation study of Lake Toba's water balance showed the possibility of having a water surplus until the mid-twenty-first century. The input discharge was predicted to be greater than the output; therefore, Lake Toba could be optimized without affecting the future water level. However, the climate projections depicted a different situation, with scenarios predicting the possibility of extreme climate anomalies, demonstrating drier climatic conditions in the future. This review concludes that it is necessary to conduct an in-depth, comprehensive, and systematic study to identify the most dominant factor among the three that is causing the decrease in the Lake Toba water level and to describe the future projected water level.

scholarly journals From the Philosophy of Cult to the Philosophy of History in the Work of Pavel Alexandrovich Florensky (* 1882 + 1937)

Religions ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 533
Author(s):  
Daniel Porubec
Keyword(s):  
Human Activities ◽  
Historical Materialism ◽  
Philosophy Of History ◽  
Abstract Concepts ◽  
Interdisciplinary Work ◽  
Primary Activity ◽  
Human Ability ◽  
The Gift ◽  
The Common ◽  
Historical Periods

P. A. Florensky dedicated nine writings of his rich interdisciplinary work to the phenomenon of cult, which were first published in a censored form in 1977. We turn our attention to one of these writings called Cult, Religion and Culture, published under the common title Philosophy of Cult, in which the author elaborates a distinctive concept of the cult as the primary activity of man and at the same time as the gift offered to him for his own sanctification. It is the sacred cult—sacra from where, according to the author, two other human activities originate: namely, the ability to create tools—instrumenta—and the ability to create abstract concepts—notiones. However, both human activities have to be understood as a process of disintegration of the cult—sacra. Thus, by prioritizing one of the three human activities mentioned above, we can recognize three historical periods in history. According to Florensky, the human ability to create tools corresponds to the era of historical materialism, the ability to create concepts corresponds to the era of ideologism, and ultimately, the primary human activity—the life of man in the cult and its culture corresponds to the sacral materialism or concrete idealism.

The First Global Environmental Problem

2018 ◽  
pp. 38-54
Author(s):  
Hannah Holleman
Keyword(s):  
Arid Region ◽  
Climatic Conditions ◽  
Dust Bowl ◽  
Colonial Expansion ◽  
Global Environmental ◽  
Humid Region ◽  
The World ◽  
The Common ◽  
Ecological Relations ◽  
Economic Developments

This chapter challenges typical interpretations of the Dust Bowl and puts the disaster into a global frame, linking the past to the present. In so doing, the common roots of contemporary and past developments and struggles are revealed. The Dust Bowl was one spectacular instance of a global problem of soil erosion associated with capitalist colonial expansion. While the official interpretation suggests that agriculture suited for a humid region was imported to an arid region, precipitating the crisis, contemporaneous accounts illustrate how much larger the crisis was, tied up with specific social and economic developments that imposed new socio-ecological relations upon peoples of the world and upon the land irrespective of local climatic conditions. Ultimately, the common denominators across the world—from North to South America, Australia to Africa, and Southeast to East Asia—were not climate and geography, but capitalism and colonialism.

scholarly journals Two new reports of thrips (Thysanoptera: Thripidae) from India

2018 ◽  
Vol 10 (2) ◽  
pp. 11312
Author(s):  
R. R. Rachana ◽  
R. Varatharajan
Keyword(s):  
Frankliniella Occidentalis ◽  
Western Flower Thrips ◽  
Climatic Conditions ◽  
Southern India ◽  
Flower Thrips ◽  
The Common ◽  
Planting Materials ◽  
The Nilgiris ◽  
First Time ◽  
The Western Ghats

Caliothrips punctipennis (Hood) and the male of Western Flower Thrips Frankliniella occidentalis (Pergande) have been recorded for the first time from India.  F. occidentalis was collected on the leaves of Erythrina indica from Ooty in the Nilgiris, the Western Ghats, southern India, whereas C. punctipennis was collected from yellow pan traps laid at Great Nicobar, India.  Considering the quarantine importance of the pest F. occidentalis, the report of the male for the first time in India needs attention and concern.  Males are also known to be more effective vectors of tospoviruses than females.  Xerochrysum bracteatum, the Common Golden Everlasting Daisy, is often taken out of Ooty by tourists to other parts of the country.  This along with other planting materials carried by tourists and farmers could aid in the dispersal of F. occidentalis to the temperate regions of northern and southern India, where it is likely to thrive in the congenial climatic conditions prevalent there.  Under these circumstances, it is imperative that quarantine mechanisms within the country are activated and strengthened, to prevent the spread of this notorious pest to the rest of India from the pockets of its occurrence in southern India - particularly the Nilgiris.  The diagnostic characters of both species are discussed. 

scholarly journals Methodology for Optimization of Road Works Schedule According to Local Climatic Data

2019 ◽  
Vol 8 (4) ◽  
pp. 1470-1476
Keyword(s):  
Time Management ◽  
General Rule ◽  
Climatic Conditions ◽  
Design Guidelines ◽  
Climatic Data ◽  
Usual Practice ◽  
Road Project ◽  
Technical Specifications ◽  
The Common ◽  
On The Road

Road works, either from public or from private sector, are designed and constructed according to specific requirements that are commonly governed by national regulations. In Greece, “Road Design Guidelines Manual” and “Greek Technical Specifications” of the Hellenic Organization for Standardization or, in some cases, European Norms, stand for the framework road works are implemented. The common practice for projects design, consists of usual addressing of schedule followed and periods of year that work is suspended. Financial and time requirements, following this framework, usually do not take into account prevailing weather behavior on each work site. A methodology to optimize this procedure, according to local climatic conditions, is presented in this paper. The improved schedule is finally conducted by considering, in addition to the common practice, special local climatic data, following a step by step scheme, comprehensively explained in this study. Usual practice dictated by Greek specifications on the road works field, is enlightened. Reduction of these valuable resources requirements is the main purpose of the proposed methodology. Accordingly, a holistic approach considering apart from common project time management techniques, climatic uniqueness of each work location as well, is the quintessence of this paper. Redistribution of working time-periods and re-arrangement of machinery equipment along with adequate personnel, based on climatic features of the location each road project takes place, is the crucial factor that boosts up productivity and releases resources that are unnecessarily assigned either to work or to be suspended in the frame of a typical timetable, main characteristic of which, is programming excluding winter months, as general rule. In this study, the frame, as for the schedule, considering the special climate features of each road project, is proposed accordingly.

scholarly journals Spatial Relationship between Precipitation and Runoff in Africa

2018 ◽  
Author(s):  
Fidele Karamage ◽  
Yuanbo Liu ◽  
Xingwang Fan ◽  
Meta Francis Justine ◽  
Guiping Wu ◽  
...  
Keyword(s):  
Land Surface ◽  
Spatial Scales ◽  
Spatial Relationship ◽  
Resource Planning ◽  
Climatic Conditions ◽  
Runoff Coefficient ◽  
Global Precipitation Climatology Centre ◽  
High Runoff ◽  
Monthly Runoff

Abstract. Lack of sufficient and reliable hydrological information is a key hindrance to water resource planning and management in Africa. Hence, the objective of this research is to examine the relationship between precipitation and runoff at three spatial scales, including the whole continent, 25 major basins and 55 countries. For this purpose, the long-term monthly runoff coefficient (Rc) was estimated using the long-term monthly runoff data (R) calculated from the Global Runoff Data Centre (GRDC) streamflow records and Global Precipitation Climatology Centre (GPCC) precipitation datasets for the period of time spanning from 1901 to 2017. Subsequently, the observed Rc data were interpolated in order to estimate Rc over the ungauged basins under guidance of key runoff controlling factors, including the land-surface temperature (T), precipitation (P) and potential runoff coefficient (Co) inferred from the land use and land cover, slope and soil texture information. The results show that 16 % of the annual mean precipitation (672.52 mm) becomes runoff (105.72 mm), with a runoff coefficient of 0.16, and the remaining 84 % (566.80 mm) evapotranspirates over the continent during 1901–2017. Spatial analysis reveals that the precipitation–runoff relationship varies significantly among different basins and countries, mainly dependent on climatic conditions and its inter-annual variability. Generally, high runoff depths and runoff coefficients are observed over humid tropical basins and countries with high precipitation intensity compared to those located in subtropical and temperate drylands.

scholarly journals Discovery of a spatially and temporally persistent core microbiome of the common bean rhizosphere

2020 ◽  
Author(s):  
Nejc Stopnisek ◽  
Ashley Shade
Keyword(s):  
Common Bean ◽  
Spatial Scales ◽  
The United States ◽  
Plant Health ◽  
Soil Conditions ◽  
Full Potential ◽  
Core Microbiome ◽  
Starting Point ◽  
The Common ◽  
Plant Microbiome

AbstractPlants recruit soil microbes that provide nutrients, promote growth and protect against pathogens1–3. However, the full potential of microbial communities for supporting plant health and agriculture is unrealized4–6, in part because rhizosphere members key for plant health are difficult to prioritize7. Microbes that ubiquitously associate with a plant species across large spatial scales and varied soil conditions provide a practical starting point for discovering beneficial members7. Here, we quantified the structures of bacterial/archaeal and fungal communities in the common bean rhizosphere (Phaseolus vulgaris), and assessed its core membership across space and time. To assess a spatial core, two divergent bean genotypes were grown in field conditions across five major growing regions in the United States, and then also compared to eight genotypes grown in Colombian soil. To assess a temporal core, we conducted a time course of rhizosphere and rhizoplane microbiome members over bean development in the field. Surprisingly, there were 48 persistent bacterial taxa that were detected in all samples, inclusive of U.S. and Colombian-grown beans and over plant development, suggesting cosmopolitan enrichment and time-independence. Neutral models of abundance-occupancy relationships and co-occurrence networks show that many of these core taxa are deterministically selected and likely in intimate relationships with the plant. Many of the core taxa were yet-uncultured and affiliated with Proteobacteria; these taxa are prime targets in support of translational plant-microbiome management. More generally, this work reveals that core members of the plant microbiome can have both broad ranges and temporal persistence with their host, suggesting intimate, albeit possibly opportunistic, interactions.

scholarly journals Geomorphological indicators of large-scale climatic changes in the Eastern Bolivian lowlands

2006 ◽  
Vol 61 (2) ◽  
pp. 120-134 ◽  
Author(s):  
J. May
Keyword(s):  
South America ◽  
Large Scale ◽  
Climate Changes ◽  
Landscape Evolution ◽  
Spatial Scales ◽  
Climatic Changes ◽  
Climatic Conditions ◽  
Fluvial Erosion ◽  
Paleoclimatic Significance ◽  
Bolivian Lowlands

Abstract. This study provides an inventory of geomorphological landforms in Eastern Bolivia at different spatial scales. Landforms and associated processes are interpreted and discussed regarding landscape evolution and paleoclimatic significance. Thereby, preliminary conclusions about past climate changes and the geomorphic evolution in Eastern Bolivia can be provided. Fluvial and aeolian processes are presently restricted to a few locations in the study area. A much more active landscape has been inferred from large-scale Channel shifts and extensive paleodune Systems. Mobilization. transport and deposition of Sediments are thought to be the result of climatic conditions drier than today. However. there are also indications of formerly wetter conditions such as fluvial erosion and paleolake basins. In conclusion, the documentation and interpretation of the manifold landforms has shown to contain a considerable amount of paleoecological information, which might serve as the base for further paleoclimatic research in the central part of tropical South America.

scholarly journals Horticultural Classification of Citrus Cultivars

2021 ◽  
Author(s):  
Jagveer Singh ◽  
Vishal Sharma ◽  
Kuldeep Pandey ◽  
Shahnawaz Ahmed ◽  
Manveen Kaur ◽  
...  
Keyword(s):  
Natural Populations ◽  
Climatic Conditions ◽  
Poncirus Trifoliata ◽  
Citrus Fruits ◽  
The World ◽  
Major Producer ◽  
The Common

Globally, citrus fruits are grown over an area of 11.42 million ha with 179.0 million tons production. China with 82.7 m tons production is the major producer of citrus fruits followed by Brazil (18.14 m tons) and India (10.53 m tons) (FAOSTAT, 2019). All commercially used scion and rootstock cultivars belong to the genus Citrus, except kumquats, Fortunella spp., and Poncirus trifoliata, which are used as rootstock only all over the world. Worldwide citrus cultivars divided into four, reasonably-well-defined horticultural groups: the Sweet oranges, the mandarins, the grapefruits and the pummelos and the common acid members. The true or ‘biological’ citrus, including species of Citrus (C. reticulata, C. maxima and C. medica), share certain characteristics, however, these are clearly differentiated according to the morpho- taxonomic traits. Hundreds of different citrus cultivars are available. Many varieties were chance finds from natural populations, and not the product of intentional breeding efforts. Other varieties in common use have originated from planned citrus hybridization and breeding efforts from worldwide. Most of the readers will be well acquainted with the cultivated types of Citrus scion and rootstocks. This chapter provides ripening season information for worldwide, farmers/gardeners have had success with citrus in many different regions of world where tropical/subtropical climatic conditions occur.

Topographic disequilibrium, landscape dynamics and active tectonics: an example from the Bhutan Himalayas

2021 ◽  
Author(s):  
Martine Simoes ◽  
Timothée Sassolas-Serrayet ◽  
Rodolphe Cattin ◽  
Romain Le Roux-Mallouf ◽  
Matthieu Ferry ◽  
...  
Keyword(s):  
Spatial Organization ◽  
Spatial Scales ◽  
Active Tectonics ◽  
Recent Change ◽  
Climatic Conditions ◽  
Landscape Dynamics ◽  
Drainage Basins ◽  
Equilibrium Conditions ◽  
Longitudinal Band ◽  
Active Tectonic

<p>The quantification of active tectonics from geomorphological and morphometric approaches most often implies that erosion and tectonics have reached a certain balance. Such equilibrium conditions may however be seldom found in nature, in particular because drainage basins may be quite dynamic even though tectonic and climatic conditions remain constant. Here, we document this drainage dynamics from the particular case example of the Bhutan Himalayas. Evidence for out-of-equilibrium morphologies have for long been noticed in Bhutan, from major (> 1 km high) river knickpoints and from the existence of high-altitude low-relief regions within the mountain hinterland. These peculiar morphologies were generally interpreted as representing a recent change in climatic and/or tectonic conditions. To further characterize these morphologies and their dynamics, and from there discuss their origin and meaning, we perform field observations and a detailed quantitative morphometric analysis using Chi plots and Gilbert metrics of drainages over various spatial scales, from major Himalayan rivers to local streams draining the low-relief regions. We first find that the river network is highly dynamic and unstable. Our results emphasize that the morphology of Bhutan does not result from a general wave of incision propagating upstream, as expected from most previous interpretations. Also, the specific spatial organization in which all major knickpoints and low-relief regions are located along a longitudinal band in the Bhutan hinterland, whatever their spatial scale and the dimensions of the associated drainage basins, calls for a common local supporting mechanism most probably related to active tectonic uplift. Our results emphasize the need for a precise documentation of landscape dynamics and disequilibrium over various spatial scales as a first-order step in morpho-tectonic studies of active landscapes.</p>

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