The relationship between animal foraging and nutrient patchiness in south-west Australian woodland soils

Soil Research ◽  
2003 ◽  
Vol 41 (4) ◽  
pp. 665 ◽  
Author(s):  
Mark J. Garkaklis ◽  
J. S. Bradley ◽  
R. D. Wooller
Keyword(s):  
Soil Nutrients ◽  
Surface Soil ◽  
Natural Populations ◽  
Water Infiltration ◽  
European Settlement ◽  
South West ◽  
Bettongia Penicillata ◽  
Australian Continent ◽  
The Relationship ◽  
Preferential Water

The woylie (Bettongia penicillata) was once common and abundant over the southern third of the Australian continent. Since European settlement the range of this rat-kangaroo has become reduced by more than 97%, and until the early 1990s, only 3 small natural populations remained, all in south-western Australia. These medium-sized (c. 1 kg) marsupials create a large number of diggings as they forage for the hypogeous fruiting bodies of ectomycorrhizal fungi upon which they feed. The effect of such foraging activity on the availability of plant nutrients in the vicinity of such diggings was evaluated in simulated digging experiments. Available nitrate, ammonium, and sulfur decreased significantly 3 years after diggings were constructed and had filled in, whereas phosphorus, potassium, iron, and organic carbon remained unchanged. The results suggest that preferential water infiltration via woylie diggings leads to a decrease in those soil nutrients that are susceptible to leaching and indicates that digging vertebrates may influence the distribution of surface soil nutrients.

The Germans and their Jewish Neighbors on the Ukrainian Areas at the Second Half of the 19th Century

2020 ◽  
pp. 17-27
Author(s):  
D. Meshkov
Keyword(s):  
Everyday Life ◽  
19Th Century ◽  
Russian Empire ◽  
Early Years ◽  
Criminal Cases ◽  
South West ◽  
Multiethnic Population ◽  
The Russian Empire ◽  
The 19Th Century ◽  
The Relationship

The article presents some of the author’s research results that has got while elaboration of the theme “Everyday life in the mirror of conflicts: Germans and their neighbors on the Southern and South-West periphery of the Russian Empire 1861–1914”. The relationship between Germans and Jews is studied in the context of the growing confrontation in Southern cities that resulted in a wave of pogroms. Sources are information provided by the police and court archival funds. The German colonists Ludwig Koenig and Alexandra Kirchner (the resident of Odessa) were involved into Odessa pogrom (1871), in particular. While Koenig with other rioters was arrested by the police, Kirchner led a crowd of rioters to the shop of her Jewish neighbor, whom she had a conflict with. The second part of the article is devoted to the analyses of unty-Jewish violence causes and history in Ak-Kerman at the second half of the 19th and early years of 20th centuries. Akkerman was one of the southern Bessarabia cities, where multiethnic population, including the Jews, grew rapidly. It was one of the reasons of the pogroms in 1865 and 1905. The author uses criminal cases` papers to analyze the reasons of the Germans participation in the civilian squads that had been organized to protect the population and their property in Ackerman and Shabo in 1905.

Changing Places: Rock Art and Holocene Landscapes in the Wadi al-Ajal, South-West Libya

2014 ◽  
Vol 12 (2) ◽  
pp. 165-182 ◽  
Author(s):  
Tertia Barnett ◽  
Maria Guagnin
Keyword(s):  
Spatial Analysis ◽  
Surface Water ◽  
Rock Art ◽  
Human Settlement ◽  
Gis Model ◽  
South West ◽  
Settlement Location ◽  
Central Sahara ◽  
The Relationship ◽  
Over Time

This article examines the relationship between rock art and landscape use by pastoral groups and early settled communities in the central Sahara from around 6000 BC to 1000 AD. During this period the region experienced significant climatic and environmental fluctuations. Using new results from a systematic survey in the Wadi al-Ajal, south-west Libya, our research combines data from over 2000 engraved rock art panels with local archaeological and palaeoenvironmental evidence within a GIS model. Spatial analysis of these data indicates a correspondence between the frequency of rock art sites and human settlement over time. However, while changes in settlement location were guided primarily by the constraints on accessibility imposed by surface water, the distribution of rock art relates to the availability of pasture and patterns of movement through the landscape. Although the reasons for these movements undoubtedly altered over time, natural routes that connected the Wadi al-Ajal and areas to the south continued to be a focus for carvings over several thousand years.

Improved growth and yield of Faba beans (Vicia faba cv. Fiord) by inoculation with strains of Rhizobium leguminosarum biovar. viciae in acid soils in south west Victoria

1994 ◽  
Vol 45 (3) ◽  
pp. 613 ◽  
Author(s):  
JM Carter ◽  
WK Gardner ◽  
AH Gibson
Keyword(s):  
Vicia Faba ◽  
Rhizobium Leguminosarum ◽  
Field Experiments ◽  
Natural Populations ◽  
Acid Soils ◽  
Growth And Yield ◽  
Nitrogen Accumulation ◽  
Commercial Strain ◽  
South West ◽  
Faba Beans

The response of faba beans (Vicia faba L. cv. Fiord) to seed inoculation with eight strains of Rhizobium leguminosarum biovar. viciae was examined in field experiments at six sites on acid soils in south-west Victoria. At two of the sites, two additional strains were examined, and in 1988, 14 strains were examined at one site. Very low natural populations of R. leguminosarum bv. viciae were found at the experimental sites. Most strains resulted in improved early nodulation and increased grain yield at all sites, when compared to inoculation with the commercial strain of rhizobia (SU391). Plant dry matter production and nitrogen accumulation in the plant shoot tissue was also increased at one site during the flowering period by some strains. Large visual differences between plots inoculated with SU391 and other strains were evident at most sites. Most uninoculated treatments were not nodulated and yielded very poorly. Treatments inoculated with the strain SU391 performed similarly to the uninoculated treatments.

An ecological explanation for hyperallometric scaling of reproduction

2021 ◽  
Author(s):  
Tomos Potter ◽  
Anja Felmy
Keyword(s):  
Body Size ◽  
Reproductive Output ◽  
Resource Competition ◽  
Natural Populations ◽  
Scaling Exponent ◽  
Wild Populations ◽  
Wet Season ◽  
Size Dependent ◽  
In The Wild ◽  
The Relationship

AbstractIn wild populations, large individuals have disproportionately higher reproductive output than smaller individuals. We suggest an ecological explanation for this observation: asymmetry within populations in rates of resource assimilation, where greater assimilation causes both increased reproduction and body size. We assessed how the relationship between size and reproduction differs between wild and lab-reared Trinidadian guppies. We show that (i) reproduction increased disproportionately with body size in the wild but not in the lab, where effects of resource competition were eliminated; (ii) in the wild, the scaling exponent was greatest during the wet season, when resource competition is strongest; and (iii) detection of hyperallometric scaling of reproduction is inevitable if individual differences in assimilation are ignored. We propose that variation among individuals in assimilation – caused by size-dependent resource competition, niche expansion, and chance – can explain patterns of hyperallometric scaling of reproduction in natural populations.

scholarly journals The Relationship between HR Competencies and Organizational Performance in the Banking Sector in Nigeria

2018 ◽  
Vol 8 (1) ◽  
pp. 217
Author(s):  
Choi Sang Long ◽  
Goh Chin Fei ◽  
Uti Charles Amechi ◽  
Tan Owee Kowang
Keyword(s):  
Organizational Performance ◽  
Role Model ◽  
Banking Sector ◽  
Quantitative Approach ◽  
South West ◽  
Hr Role ◽  
The Relationship ◽  
Hr Competencies

This study investigated the relationship between HR competencies and organizational performance by adapting the Ulrich HR Role Model. The study also examined HR competencies such as strategic positioner, credible activist, capability builder, change champion, HR innovator/integrator, technology proponent and project facilitator. The research is based on 215 HR professionals from 20 consolidated banks located in South-West Nigeria. A quantitative approach was used for the analysis. The findings revealed that all HR competencies also have significant correlation with organizational performance. Furthermore, competency such as strategic positioner and technology proponent provide most impact to organizational performance.

scholarly journals EVALUASI TERHADAP PERUBAHAN STATUS BEBERAPA HARA TANAH SETELAH 10 TAHUN DI BUKIT GAJABUIH PADANG

Jurnal Solum ◽  
2008 ◽  
Vol 5 (1) ◽  
pp. 23
Author(s):  
Hermansah Hermansah ◽  
Juniarti Juniarti ◽  
Utami Maya Pribadi
Keyword(s):  
Soil Nutrients ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
The Other ◽  
Experimental Plot ◽  
Soil Nutrient Status ◽  
P Content ◽  
The Relationship

This experiment is about the evaluation of characteristic alteration of soil nutrients after ten years at tropical rain forest Bukit Gajabuih Gunung Gadut Padang. This experiment was conducted from November 2006 - April 2007.  This experiment is arranged based on anova design with three treatments which was based on three great groups of land ( oxic-dystroudept (eutriccc, aquic), oxic-dystroudept (xanthic), oxic-typic-dystroudept (xanthic)).  The purpose of this experiment was to study the alteration of soil fertility characteristics  (K, Ca, Mg, Na, P and C/N) in ten years period (1995-2005) in tropical rain forest at Bukit Gajabuih Padang, to observe vegetation variety alteration, and the relationship with the land fertility characteristics.  From the experiment was found that nutrient status of the soils altered after ten years (*1995-2005).  Available P content increased about 77%, exchangeable Na and K  increased 86,04% and 53.65%, respectively.  On the other hand, exchangeable Mg and Ca decreased 3,05% and 65,88%, respectively.  Land C/N ratio decreased about 21,39%. The experimental plot had low soil pH.Key Words: tropical rain forest, soil nutrient status

Reconstructing human–landscape interactions in the ancient Mediterranean harbour of Cartagena (Spain)

The Holocene ◽  
2018 ◽  
Vol 28 (6) ◽  
pp. 879-894 ◽  
Author(s):  
Trinidad Torres ◽  
Sebastián Ramallo ◽  
Yolanda Sánchez-Palencia ◽  
Milagros Ros ◽  
José E Ortiz ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Salinity Gradient ◽  
Alluvial Fans ◽  
Aeolian Deposits ◽  
Holocene Transgression ◽  
South West ◽  
Marine Influence ◽  
The Relationship ◽  
Amino Acid Racemisation ◽  
Human Landscape

Here, we sought to reconstruct the Pleistocene and Holocene evolution of Cartagena Bay. Therefore, 16 borehole cores were analysed with the following aims: (1) to define a chronological framework; (2) to obtain data on the palaeoenvironment; and (3) to establish the relationship with human activities, especially focused on the reconstruction of the Carthago Nova (also known as Qart Hadasht) conquest. A total of 147 samples were recovered for amino acid racemisation (AAR) dating; 32 for radiocarbon dating (14C); and 159 for sedimentological, palaeontological, and biomarker determination. These approaches allowed us to elucidate the evolutionary phases of the palaeolandscape in Cartagena. The simultaneous use of AAR and 14C dating allowed the discrimination of spurious ages and the establishment of a chronological scale. During the Marine Isotope Stages (MIS) 7 and 5, the sea level (SL) in Cartagena Bay was almost the same as today. An alluvial plain developed in the northern area, and a delta was formed by an ephemeral river. In contrast, during MIS4, after a fall in SL, a wide sandy coastal plain emerged, leading to the accumulation of colluvial and aeolian deposits. The Holocene transgression was reflected in the hinterland in a late and temporarily floodable marsh fed by alluvial fans and creeks, producing a salinity gradient from freshwater to brackish and saline waters. Along the sea front, the marine influence was evident but not dominant, grading up and landwards to saline and freshwater marshes. Therefore, at the time of Scipio’s conquest, the geography of Carthago Nova was quite different from that described by Polybius. The Roman’s sudden attack seized Qart Hadasht from the south-west, avoiding the marshy area and not crossing a fast and deep ebb stream as it never existed on the Mediterranean Iberian coast.

scholarly journals Dermatoglyphic appraisal of multiple births women in Igbo-Ora and Ogbomosho, South west, Nigeria

2020 ◽  
Vol 9 (1) ◽  
pp. 1744-1751
Author(s):  
Kehinde T. Adenowo ◽  
Olugbenga O. Eweoya ◽  
Olugbemi T. Olaniyan ◽  
Abayomi Ajayi
Keyword(s):  
Adult Female ◽  
Group Iv ◽  
Multiple Births ◽  
Group Iii ◽  
South West ◽  
Group I ◽  
Palm Print ◽  
The Relationship ◽  
Palmar Flexion ◽  
Palmar Flexion Creases

The scientific study of epidermal ridges on the palms and toes is termed dermatoglyphics. Multiple births occur when more than one fetus results  from a single pregnancy. This study is aimed at determining the relationship if any between multiple births and palmar flexion creases. Two  hundred Igbo-Ora and one hundred Ogbomosho healthy and consenting adult female indigenes aged between 25-50 years were recruited and grouped into 4; group I consisted of multiple births women in Igbo-Ora; group II consisted of single births women in Igbo-Ora; group III consisted of multiple births women in Ogbomosho; and group IV consisted of single births women in Ogbomosho. A total of 600 palms (Igbo-Ora n=400; Ogbomosho n=200) comprising of both hands were used in the study. Palm prints samples were obtained by asking the participants to wash their hands, towel dry them, after which they were stained with stamp ink pad and prints made on A4 paper in duplicates. Palm print patterns of 105 (Igbo-Ora) and 50 (Ogbomosho) women with multiple births were compared with 95 (Igbo-Ora) and 50 (Ogbomosho) women with single births. The percentage number of primary, P and intersection, I of palmar creases with complete transverse creases, C (PIC) 300 bilaterally was significantly  greater (p < 0.005) in the hands of Igbo-Ora multiple births women (52.4 %) than their single births women (37.4%) while same trend was observed for Ogbomosho women although difference was statistically insignificant,(p > 0.005). In both Igbo-Ora and Ogbomosho women, PIC 310 bilaterally was found to be significantly higher (p < 0.05) in both hands of single births women than the multiple births women. Hence, dermatoglyphics can be said to have relationship with a woman’s tendency to giving birth to multiples. Keywords: Multiple births, dermatoglyphics, palmar flexion creases, Ogbomosho, Igbo-Ora

Modelling patterns of parasite aggregation in natural populations: trichostrongylid nematode–ruminant interactions as a case study

Parasitology ◽  
1995 ◽  
Vol 111 (S1) ◽  
pp. S135-S151 ◽  
Author(s):  
B. T. Grenfell ◽  
K. Wilson ◽  
V. S. Isham ◽  
H. E. G. Boyd ◽  
K. Dietz
Keyword(s):  
Population Biology ◽  
Negative Binomial ◽  
Natural Populations ◽  
Parasite Load ◽  
Host Immunity ◽  
Moment Closure ◽  
The Mean ◽  
Parasite Aggregation ◽  
The Impact ◽  
The Relationship

SUMMARYThe characteristically aggregated frequency distribution of macroparasites in their hosts is a key feature of host–parasite population biology. We begin with a brief review of the theoretical literature concerning parasite aggregation. Though this work has illustrated much about both the sources and impact of parasite aggregation, there is still no definitive analysis of both these aspects. We then go on to illustrate the use of one approach to this problem – the construction of Moment Closure Equations (MCEs), which can be used to represent both the mean and second moments (variances and covariances) of the distribution of different parasite stages and phenomenological measures of host immunity. We apply these models to one of the best documented interactions involving free-living animal hosts – the interaction between trichostrongylid nematodes and ruminants. The analysis compares patterns of variability in experimental infections of Teladorsagia circumcincta in sheep with the equivalent wildlife situation – the epidemiology of T. circumcincta in a feral population of Soay sheep on St Kilda, Outer Hebrides. We focus on the relationship between mean parasite load and aggregation (inversely measured by the negative binomial parameter, k) for cohorts of hosts. The analysis and empirical data indicate that k tracks the increase and subsequent decline in the mean burden with host age. We discuss this result in terms of the degree of heterogeneity in the impact of host immunity or parasite-induced mortality required to shorten the tail of the parasite distribution (and therefore increase k) in older animals. The model is also used to analyse the relationship between estimated worm and egg counts (since only the latter are often available for wildlife hosts). Finally, we use these results to review directions for future work on the nature and impact of parasite aggregation.

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