scholarly journals The underpinnings of the relationship of species richness with space and time

2011 ◽  
Vol 81 (2) ◽  
pp. 195-213 ◽  
Author(s):  
Samuel M. Scheiner ◽  
Alessandro Chiarucci ◽  
Gordon A. Fox ◽  
Matthew R. Helmus ◽  
Daniel J. McGlinn ◽  
...  
Keyword(s):  
Species Richness ◽  
Space And Time ◽  
Relationship Of ◽  
The Relationship

scholarly journals Diversity and distribution of testate amoebae (Amoebozoa, Rhizaria) in reservoirs, Northeastern Bulgaria

2018 ◽  
Vol 5 (2) ◽  
pp. 90-99
Author(s):  
Rositsa Davidova ◽  
Senay Sevginov
Keyword(s):  
Regression Analysis ◽  
Species Richness ◽  
Diversity Index ◽  
Taxonomic Diversity ◽  
Testate Amoebae ◽  
The Other ◽  
Water Volume ◽  
Species Richness And Abundance ◽  
Relationship Of ◽  
The Relationship

Abstract The aim of the study is to describe the testate amoebae fauna in seven reservoirs in the Northeastern Bulgaria and to investigate the relationship of taxonomic diversity and abundance of these organisms to the some characteristics of the reservoirs. A total of 52 species, varieties and forms belonging to 15 genera were identified in the benthal of the coastal zone. There are significant differences in species richness and abundance between the testacea of different reservoirs. Number of taxa was significantly higher in the Beli Lom (29 species and 12 genera) and Loznitsa (22 species and 13 genera). Most of the reservoirs - Kara Michal, Bogdantsi, Isperih, Lipnik and Brestovene have extremely poor fauna compared to other similar reservoirs. This is confirmed by the low values of the Shannon-Weaver diversity index, which varied between 1.04 and 2.396, as well as by the other indices used to assess the environmental conditions in the reservoirs. The data of the regression analysis showed that a relation between age, surface area and water volume of the reservoirs and the species richness and abundance of testacea is not established.

scholarly journals The Relationship of Social Media Usage to the Satisfaction and Practice of Friendship (Silaturahmi) among Students of Universitas Sumatera Utara

2019 ◽  
Vol 2 (4) ◽  
pp. 575-589
Author(s):  
Feni Khairifa ◽  
Suwardi Lubis ◽  
Iskandar Zulkarnain
Keyword(s):  
Social Media ◽  
Media Usage ◽  
Social Satisfaction ◽  
Space And Time ◽  
Positive Side ◽  
Use Of Social Media ◽  
The University ◽  
Relationship Of ◽  
The Relationship ◽  
North Sumatra

The study aims is to find out The Relationship of Social Media Usage to the Satisfaction and Practice of Friendship (Silaturahmi) among Students of Universitas Sumatera Utara. This research is conducted at Universitas Sumatera Utara, Dr. Mansur Street, Padang Bulan, Medan. The result shows that there is a relationship between the use of social media and social satisfaction among students of the University of North Sumatra. The form of relationships is low, but certain relationships. In addition, the relationship between the two variables is positive, which means more and more use of social media, the satisfaction of friendship among students of the University of North Sumatra will also be higher. This is because, there is a positive side to social media. A variety of features are offered, making it easier for users to communicate. Distance, space and time are no longer a barrier to stay in touch (communication).

The relationship of coprophagy to fecal microbial species richness in neonatal foals

2013 ◽  
Vol 33 (5) ◽  
pp. 345
Author(s):  
L.A. Strasinger ◽  
A.L. Fowler ◽  
S. Hayes ◽  
G.L. Gellin ◽  
M.D. Flythe ◽  
...  
Keyword(s):  
Species Richness ◽  
Microbial Species ◽  
Relationship Of ◽  
The Relationship

scholarly journals The role of geography and host abundance in the distribution of parasitoids of an alien pest

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1592 ◽  
Author(s):  
Petra Nováková ◽  
Jaroslav Holuša ◽  
Jakub Horák
Keyword(s):  
Species Richness ◽  
Leaf Miner ◽  
Horse Chestnut ◽  
Host Abundance ◽  
Alien Pest ◽  
Species Richness And Abundance ◽  
Relationship Of ◽  
Chestnut Leaf ◽  
The Relationship

Chalcid wasps (Hymenoptera: Chalcidoidea) are probably the most effective and abundant parasitoids of the horse chestnut leaf miner (Cameraria ohridella), an alien pest in Europe that lacks specialized enemies. We studied how the species richness and abundance of chalcids are influenced by altitude, direction of an alien spread and host abundance ofC. ohridella. We quantified the numbers and species richness of chalcid wasps and the numbers ofC. ohridellathat emerged from horse chestnut (Aesculus hippocastanum) leaf litter samples collected from 35 sites in the Czech Republic. Species richness of chalcids, which was considered an indicator of the possible adaptation of parasitoids to this alien host, was unrelated toC. ohridellaabundance, direction of spread, or altitude. Chalcid abundance, which was considered an indicator of parasitism of the alien host, was strongly and positively related toC. ohridellaabundance. Chalcid abundance was negatively related to direction of spread and positively related, although in a non-linear manner, to altitude. The relationship of chalcid abundance with direction of spread and altitude was weaker than that withC. ohridellaabundance. The results provide evidence that biological control of the alien pestC. ohridellaby natural enemies might develop in the future.

scholarly journals Malpighiaceae de Colombia: Patrones de distribución, riqueza, endemismo y diversidad filogenética

2021 ◽  
Vol 9 (1) ◽  
pp. 39-54
Author(s):  
Diego Giraldo-Cañas
Keyword(s):  
Species Richness ◽  
Phylogenetic Diversity ◽  
American Continent ◽  
Altitudinal Gradients ◽  
The Andes ◽  
Plant Group ◽  
Wide Range ◽  
The Family ◽  
Relationship Of ◽  
The Relationship

Malpighiaceae constitutes a family of 77 genera and ca. 1300 species, distributed in tropical and subtropical regions of both hemispheres. They are mainly diversified in the American continent and distributed in a wide range of habitats and altitudinal gradients. For this reason, this family can be a model plant group to ecological and biogeographical analyses, as well as evolutive studies. In this context, an analysis of distribution, richness, endemism and phylogenetic diversity of Malpighiaceae in natural regions and their altitudinal gradients was undertaken. Malpighiaceae are represented in Colombia by 34 genera and 246 species (19.1% of endemism). Thus, Colombia and Brazil (44 genera, 584 species, 61% of endemism) are the two richest countries on species of this family. The highest species richness and endemism in Colombia is found in the lowlands (0-500 m a.s.l.: 212 species, 28 endemics); only ten species are distributed on highlands (2500-3200 m a.s.l.). Of the Malpighiaceae species in Colombia, Heteropterys leona and Stigmaphyllon bannisterioides have a disjunct amphi-Atlantic distribution, and six other species show intra-American disjunctions. Both richness and endemism decrease with altitude (y = -0.061x + 173.57; R2 = 0.82; y = -0.009x + 27.76; R2 = 0.95, respectively). Amazonia (116 species, 4 endemics) and the Andes (89 species, 23 endemics) exhibit the highest richness among the family. In Colombia, 15 of the 19 clades among the family are represented, where the most diversified are the Stigmaphyllon clade (5 genera, 48 species, 10 endemics), the Byrsonima clade (3/39/5) and the Hiraea clade (3/31/9). The relationship of phylogenetic diversity with altitude is similar to the pattern of specific richness by altitudinal interval. Amazonia, Orinoquia, and Magdalena Valley show highest phylogenetic diversity. These results, combined with those of other highly diversified biological groups in the country, could be important to define and delimitate new priority areas for conservation in Colombia.

scholarly journals Philosophic representations of concepts “space” and “time”: from physics to music

2019 ◽  
Keyword(s):  
Social Space ◽  
Complex Structure ◽  
Physical Space ◽  
Physical Reality ◽  
Complex Nature ◽  
Subjective Perception ◽  
Psychological Space ◽  
Space And Time ◽  
Relationship Of ◽  
The Relationship

The article discusses various philosophical ideas about space and time. It is indicated that these representations are systemic and hierarchical. The «pyramid» of these ideas is based on the most fundamental, physical concepts of the objective properties and laws of physical reality, such as the relationship of duration and the relationship of length. At the next «stage» they are complemented by the specifics of chemical and biological processes in living matter. The notions of social space and time are even more complex, which are due to the more complex nature of social processes and phenomena. However, all three groups of ideas (physical, biological and social space and time) reflect the objective properties and laws of reality. The next group of views reflects the subjective perception of duration and extent. They function on the basis of objective representations, but fix the features of the perception of the subject acting in a certain cultural «field». These primarily include psychological space and time. They have a complex structure and are associated with the daily life of the individual, which is due to both biological and social factors. The properties of this space and time are set by sensual and rational abilities of cognition, and it is the psychological space and time that serves as the ontological basis for even more complex forms of perception – artistic space and time. Art space and time are attributes of artistic fictional being, with the help of which the artistic image gets the opportunity for development and its holistic perception. A subspecies of artistic space and time – musical space-time continuum. This variety exists within a certain aspect of human artistic activity – musical art. Music is a temporary type of art; formally, music can be represented as an acoustic stream of sounds that is intonationally and rhythmically organized and unfolding in time, having a complex structure and carrying a certain semantic and communicative load. Musical time or time in music is a complex and multifaceted concept. The space in music is the visual and aesthetic images of the human imagination, caused by sound effects, these are internal metaphorical ideas about the properties of space, corresponding to a specific semantic context. Thus, speaking of music space and time, it can be argued that they are the «conceptual pinnacle» of the development of ideas about space and time in general and include many of the most important properties of other forms and types of space and time. All these forms lead their "genealogy" from the concepts of physical space and time.

scholarly journals Local and regional rarity in a diverse tropical fish assemblage

2013 ◽  
Vol 280 (1751) ◽  
pp. 20122076 ◽  
Author(s):  
A. P. Hercos ◽  
M. Sobansky ◽  
H. L. Queiroz ◽  
A. E. Magurran
Keyword(s):  
Species Richness ◽  
Tropical Fish ◽  
Conservation Priority ◽  
Space And Time ◽  
Abundance Patterns ◽  
Large Numbers ◽  
High Conservation ◽  
Relationship Of ◽  
Commonness And Rarity ◽  
Occurrence Of Species

Because most species in an ecological assemblage are rare, much of the species richness we value is due to taxa with few individuals or a restricted distribution. It has been apparent since the time of ecological pioneers such as Bates and Darwin that tropical systems have disproportionately large numbers of rare species, yet the distribution and abundance patterns of these species remain largely unknown. Here, we examine the diversity of freshwater fish in a series of lakes in the Amazonian várzea, and relate relative abundance, both as numbers of individuals and as biomass, to the occurrence of species in space and time. We find a bimodal relationship of occurrence that distinguishes temporally and spatially persistent species from those that are infrequent in both space and time. Logistic regression reveals that information on occurrence helps distinguish those species that are rare in this locality but abundant elsewhere, from those that are rare throughout the region. These results form a link between different approaches used to evaluate commonness and rarity. In doing so, they provide a tool for identifying species of high conservation priority in poorly documented but species rich localities.

Effects of Sand Dune Stabilization on Plant Diversity of Interdune Lowlands in the Semi-Arid Sand Dune Fieds

2014 ◽  
Vol 945-949 ◽  
pp. 3518-3521
Author(s):  
Shou Gang Yan ◽  
Qing Tao Xu
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Sand Dune ◽  
The Other ◽  
Dune Stabilization ◽  
Sand Dune Stabilization ◽  
Lowland Area ◽  
Relationship Of ◽  
The Relationship ◽  
Semi Arid

Considering each interdune lowland as a self-contained unit, we investigated species composition of 15 interdune lowlands in stabilized and active dunes, respectively, and identified the relationship of species richness and lowland area. The results showed that 1) with the enlargement of lowland area, the overall species richness of interdune lowlands in stabilized and active dunes increased logarithmically. When the area was the same, richness of stabilized dunes was more than that of active dunes. 2) with the increasing of lowland area in stabilized and active dunes, psammophytes richness relative to the overall species richness decreased logarithmically. When the area was the same, the percentage in lowlands of active dunes was more than that of stabilized dunes. Therefore, We concluded that dune stabilization, on one hand, raises species richness and on the other, leads to the loss of endemic or rare psammophytes in interdune lowlands.

Sign in / Sign up

Export Citation Format

Share Document