scholarly journals Trait-trait relationships and functional tradeoffs vary with genome size in prokaryotes

2021 ◽  
Author(s):  
Sara Beier ◽  
Johannes Werner ◽  
Thierry Bouvier ◽  
Nicolas Mouquet ◽  
Cyrille Violle
Keyword(s):  
Resource Use ◽  
Marker Genes ◽  
Ecological Strategies ◽  
Base Pairs ◽  
History Of ◽  
Productivity Gradients ◽  
Resilience Framework ◽  
Taxonomic Marker ◽  
Trait Correlations ◽  
Usage Efficiency

We report genomic traits that have been associated with the life history of prokaryotes and highlight conflicting findings concerning earlier observed trait correlations and tradeoffs. In order to address possible explanations for these contradictions we examined trait-trait variations of 11 genomic traits from ~ 17,000 sequenced genomes. The studied trait-trait variations suggested: (i) the predominance of two resistance and resilience-related orthogonal axes , (ii) an overlap between a resilience axis and an axis of resource usage efficiency. These findings imply that resistance associated traits of prokaryotes are globally decoupled from resilience and resource use efficiencies associated traits. However, further inspection of pairwise scatterplots showed that resistance and resilience traits tended to be positively related for genomes up to roughly five million base pairs and negatively for larger genomes. This in turn precludes a globally consistent assignment of prokaryote genomic traits to the competitor - stress-tolerator -ruderal (CSR) schema that sorts species depending on their location along disturbance and productivity gradients into three ecological strategies and may serve as an explanation for conflicting findings from earlier studies. All reviewed genomic traits featured significant phylogenetic signals and we propose that our trait table can be applied to extrapolate genomic traits from taxonomic marker genes. This will enable to empirically evaluate the assembly of these genomic traits in prokaryotic communities from different habitats and under different productivity and disturbance scenarios as predicted via the resistance-resilience framework formulated here.

scholarly journals A Brief History of Kafue National Park, Zambia.

Koedoe ◽  
2001 ◽  
Vol 44 (1) ◽  
Author(s):  
H.K. Mwima
Keyword(s):  
Wildlife Management ◽  
Resource Use ◽  
National Park ◽  
Future Studies ◽  
History Of

This paper presents the first documentation of the history of Zambia's oldest and largest national park: Kafue National Park. The movement of people out of the park is systematically presented. Furthermore, access and resource use and exploitation rights granted to people who lived inside the park are summarised. The paper looks at park administration, wildlife management, tourism and briefly presents areas for future studies.

Chloroplast DNA phylogeography in long-lived Huon pine, a Tasmanian rain forest conifer

2008 ◽  
Vol 38 (6) ◽  
pp. 1576-1589 ◽  
Author(s):  
Catherine M. Clark ◽  
Ignazio Carbone
Keyword(s):  
Nucleotide Diversity ◽  
Isolation By Distance ◽  
Population Bottlenecks ◽  
Base Pairs ◽  
Distance Model ◽  
History Of ◽  
Lagarostrobos Franklinii ◽  
Tasmanian Endemic ◽  
Western Portion

Genealogy based methods were used to estimate phylogeographic history for a Tasmanian endemic conifer, Huon pine ( Lagarostrobos franklinii (Hook. f.) Quinn). DNA from trees in eight populations was sequenced using three chloroplast primers (trnS–trnT, trnD–trnT, and psbC–trnS). Mean nucleotide diversity was low (π = 0.000 93 ± 0.000 06) from 892 base pairs of sequence, but varied in stands from 0.0 to 0.001 15. Two of the five haplotypes were widely distributed, but the most frequently occurring haplotype was found only in the western portion of the range. Population structure was highly significant among populations overall (GST = 0.261, where GST is the coefficient of gene differentiation, and p ≤ 0.0001), and there were indications of significant isolation by distance (p ≤ 0.022). Populations exhibited the highest levels of differentiation between the southeastern and northwestern watersheds. Estimates of migration between populations obtained using both parametric and nonparametric methods indicated levels of gene flow consistent with an isolation by distance model. Nested clade analysis demonstrated a pattern of genetic diversity in Huon pine that is consistent with a history of range expansion. The exceptionally low level of nucleotide diversity, haplotype distribution, and paleoecological data are congruent with a history of long-term range reduction, population bottlenecks, and subsequent colonization events from refugial areas.

scholarly journals The 9Rs Strategies for the Circular Economy 3.0

2021 ◽  
Vol 58 (1) ◽  
pp. 1440-1446
Author(s):  
Kannikar Khaw-ngern Et al.
Keyword(s):  
Economic Growth ◽  
World War Ii ◽  
Resource Use ◽  
Circular Economy ◽  
Economic Benefits ◽  
Waste To Energy ◽  
Closed Economy ◽  
World War ◽  
Key Stakeholders ◽  
History Of

Circular economy (CE) was first introduced in the 1970s as an alternative economic model for replacing the traditional linear industrial economy, the take-make-use-throw approach. However, transition to a more circular economy can be challenging due to the untenable assumptions. It is viewed as a strategy enabling the ‘decoupling’ of resource use from economic growth, but there are still questions whether the CE can decouple resource use from economic growth. The purpose of this article is to study the evolution of the circular economy and the synthesis of the 10Rs hierarchy, to examine the circular economy roadmap and to review the strategies of 9Rs and the benefits of circular economy. Documentary study and literature review were used for data collection. It is found that the history of circular economy started as early as before World War II, known as closed economy. Then, the concept of circular economy evolved to CE 1.0, CE 2.0, and CE 3.0 since 2010 onward. Although 10R hierarchy (from R0-R9) was proposed to solve confusion around new conceptions of circularity, the waste-to-energy (Recovery) does not promote resource efficiency when considering the loss of value of potentially recyclable materials through combustion. Circular Economy, when successfully implemented, can clearly bring environmental, social and economic benefits. However, a CE roadmap should integrate the key stakeholders’ views on the essential developments and actions required for the transition as well as clarifies their own role in the transition.

scholarly journals Rapid diversification rates in Amazonian Chrysobalanaceae inferred from plastid genome phylogenetics

2020 ◽  
Vol 194 (3) ◽  
pp. 271-289 ◽  
Author(s):  
Jerome Chave ◽  
Cynthia Sothers ◽  
Amaia Iribar ◽  
Uxue Suescun ◽  
Mark W Chase ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Large Fraction ◽  
Posterior Density ◽  
Base Pairs ◽  
Plastid Genomes ◽  
Single Clade ◽  
History Of ◽  
Rapid Diversification ◽  
Almost All ◽  
Highest Posterior Density

Abstract We studied the evolutionary history of Chrysobalanaceae with phylogenetic analyses of complete plastid genomes from 156 species to assess the tempo of diversification in the Neotropics and help to unravel the causes of Amazonian plant diversification. These plastid genomes had a mean length of 162 204 base pairs, and the nearly complete DNA sequence matrix, with reliable fossils, was used to estimate a phylogenetic tree. Chrysobalanaceae diversified from 38.9 Mya (95% highest posterior density, 95% HPD: 34.2–43.9 Mya). A single clade containing almost all Neotropical species arose after a single dispersal event from the Palaeotropics into the Amazonian biome c. 29.1 Mya (95% HPD: 25.5–32.6 Mya), with subsequent dispersals into other Neotropical biomes. All Neotropical genera diversified from 10 to 14 Mya, lending clear support to the role of Andean orogeny as a major cause of diversification in Chrysobalanaceae. In particular, the understory genus Hirtella diversified extremely rapidly, producing > 100 species in the last 6 Myr (95% HPD: 4.9–7.4 Myr). Our study suggests that a large fraction of the Amazonian tree flora has been assembled in situ in the last 15 Myr.

scholarly journals Back to Where It All Began: Revisiting Algonquin Resource Use and Territoriality

1969 ◽  
Vol 60 (1) ◽  
pp. 119-132 ◽  
Author(s):  
Leila Inksetter
Keyword(s):  
Nineteenth Century ◽  
Small Mammals ◽  
Resource Use ◽  
Major Element ◽  
Historical Data ◽  
Change Over Time ◽  
History Of ◽  
Access Rights ◽  
Over Time

This article examines resource use among the Algonquin and its change over time. Archaeological and historical data show that the current importance of the moose for both food and clothing among Algonquin people is a relatively recent phenomenon: in pre-contact times up until the nineteenth century, small mammals such as beaver and hare were the most important animals used. The dichotomy between access rights to moose and fur-bearing animals also seems to be a recent phenomenon. As this dichotomy has been used as a major element in theoretical reconstructions of past territoriality and governance, this re-evaluation thus offers a renewed perspective on the history of family hunting territories among Algonquian peoples.

scholarly journals Complete Chloroplast Genome of Rhipsalis baccifera, the only Cactus with Natural Distribution in the Old World: Genome Rearrangement, Intron Gain and Loss, and Implications for Phylogenetic Studies

Plants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 979
Author(s):  
Millicent Akinyi Oulo ◽  
Jia-Xin Yang ◽  
Xiang Dong ◽  
Vincent Okelo Wanga ◽  
Elijah Mbandi Mkala ◽  
...  
Keyword(s):  
Genome Rearrangement ◽  
Single Copy ◽  
Base Pairs ◽  
Protein Coding ◽  
Old World ◽  
Chloroplast Genomes ◽  
Outgroup Species ◽  
History Of ◽  
Cp Genome ◽  
Future Work

Rhipsalis baccifera is the only cactus that naturally occurs in both the New World and the Old World, and has thus drawn the attention of most researchers. The complete chloroplast (cp) genome of R. baccifera is reported here for the first time. The cp genome of R. baccifera has 122, 333 base pairs (bp), with a large single-copy (LSC) region (81,459 bp), SSC (23,531 bp) and two inverted repeat (IR) regions each 8530 bp. The genome contains 110 genes, with 73 protein-coding genes, 31 tRNAs, 4 rRNAs and 2 pseudogenes. Twelve genes have introns, with loss of introns being observed in, rpoc1clpP and rps12 genes. 49 repeat sequences and 62 simple sequence repeats (SSRs) were found in the genome. Comparative analysis with eight species of the ACPT (Anacampserotaceae, Cactaceae, Portulacaceae, and Talinaceae) clade of the suborder Portulacineae species, showed that R. baccifera genome has higher number of rearrangements, with a 19 gene inversion in its LSC region representing the most significant structural change in terms of its size. Inversion of the SSC region seems common in subfamily Cactoideae, and another 6 kb gene inversion between rbcL- trnM was observed in R. baccifera and Carnegiea gigantea. The IRs of R. baccifera are contracted. The phylogenetic analysis among 36 complete chloroplast genomes of Caryophyllales species and two outgroup species supported monophyly of the families of the ACPT clade. R. baccifera occupied a basal position of the family Cactaceae clade in the tree. A high number of rearrangements in this cp genome suggests a larger number mutation events in the history of evolution of R. baccifera. These results provide important tools for future work on R. baccifera and in the evolutionary studies of the suborder Portulacineae.

THE EFFICIENCY OF MODIFIED RODENTICIDE BAITS

2021 ◽  
Vol 1 (4) ◽  
pp. 436-440
Author(s):  
Svetlana E. Shereshkova ◽  
◽  
Polina S. Kovalenko ◽  
Keyword(s):  
Economic Loss ◽  
Loss Estimation ◽  
Field Conditions ◽  
Rodent Control ◽  
Estimation Formula ◽  
History Of ◽  
Usage Efficiency

This paper highlights formulated means and methods of synanthropic (mouse-like) rodent control. Also, the history of struggling with mouse-like rodents is considered, the rodents-caused economic loss estimation formula is provided, the dynamics of development of new forms of deratization agents and their usage efficiency in the field conditions and in stock-raising facilities.

Grinnelian and Eltonian niche conservatism of the European honeybee (Apis mellifera) in its exotic distribution

Sociobiology ◽  
2020 ◽  
Vol 67 (2) ◽  
pp. 239
Author(s):  
Anderson Matos Medina ◽  
Mário Almeida-Neto
Keyword(s):  
Life History ◽  
Apis Mellifera ◽  
Exotic Species ◽  
Resource Use ◽  
Life History Traits ◽  
Niche Conservatism ◽  
Species Invasion ◽  
Species Invasions ◽  
History Of ◽  
European Honeybee

The understanding of how niche-related traits change during species invasion have prompted what is now known as the niche conservatism principle. Most studies that have tested the niche conservatism principle have focused on the extent to which the species’ climatic niches remain stable in their exotic distribution. However, it is equality important to address how biotic specialization, i.e. resource use, changes during exotic species invasions. Here, we use the widespread European honeybee (Apis mellifera) to understand whether its Grinnelian and Eltonian niches changed in its exotic distribution using tests of abiotic and biotic niche conservatism. We found that both niche domains of the European honeybee remained stable in its exotic distribution, which means that neither the climatic niche nor the biotic specialization showed significant differences between the native and the exotic ranges. Our findings that climatic and resource use are coupled can be explained by A. mellifera’s long history of domestication and the possibility that life history traits (e.g., polyandry) may have shaped this species’ large niche over the course of evolution and therefore facilitated exotic ranges colonization.

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