scholarly journals Habitats of native and exotic plants in Colorado shortgrass steppe: a comparative approach

1998 ◽  
Vol 76 (4) ◽  
pp. 664-672 ◽  
Author(s):  
Peter M Kotanen ◽  
Joy Bergelson ◽  
Donald L Hazlett
Keyword(s):  
Geographic Origin ◽  
Habitat Characteristics ◽  
Comparative Approach ◽  
Riparian Zones ◽  
Common Ancestry ◽  
Central Plains ◽  
Invading Species ◽  
Close Relatives ◽  
Grassland Habitats ◽  
The Relationship

Invading species often are close relatives, and therefore share many characteristics as a consequence of their common ancestry. This tends to confound studies of invasions, since many irrelevant characteristics are likely to be correlated with a species' geographic origin (alien or native). We address this problem by using phylogenetically independent comparisons to investigate the habitat characteristics of plants of the Central Plains Experimental Range (Colorado, U.S.A.). We initially show that exotic species are more likely than natives to occur in riparian zones, roadsides, and disturbed sites, and less likely to occur in grassland. The relationship between exotic origins and disturbed sites disappears when phylogenetic dependence is removed from the analyses; in contrast, the other associations persist following phylogenetic detrending, indicating that aliens and their native relatives consistently differ in their ability to exploit riparian, roadside, and grassland habitats. Our results indicate that disturbed sites currently are dominated by only a few groups of related exotic ruderals, while the ability to exploit roadsides and riparian zones has been and may continue to be important for the success of many taxa of invaders.Key words: biological invasions, comparative methods, disturbance, grasslands, phylogeny.

Colonialism and the Highland Clearances

2017 ◽  
Vol 8 (1) ◽  
pp. 22-48 ◽  
Author(s):  
Iain Mackinnon
Keyword(s):  
Industrial Development ◽  
Comparative Approach ◽  
Indigenous Research ◽  
Internal Colonialism ◽  
New Approach ◽  
A Site ◽  
Relationship Of ◽  
The Relationship ◽  
Imperial State ◽  
Late Modern

This article employs a new approach to studying internal colonialism in northern Scotland during the 18th and 19th centuries. A common approach to examining internal colonial situations within modern state territories is to compare characteristics of the internal colonial situation with attested attributes of external colonial relations. Although this article does not reject the comparative approach, it seeks to avoid criticisms that this approach can be misleading by demonstrating that promoters and managers of projects involving land use change, territorial dispossession and industrial development in the late modern Gàidhealtachd consistently conceived of their work as projects of colonization. It further argues that the new social, cultural and political structures these projects imposed on the area's indigenous population correspond to those found in other colonial situations, and that racist and racialist attitudes towards Gaels of the time are typical of those in colonial situations during the period. The article concludes that the late modern Gàidhealtachd has been a site of internal colonization where the relationship of domination between colonizer and colonized is complex, longstanding and occurring within the imperial state. In doing so it demonstrates that the history and present of the Gaels of Scotland belongs within the ambit of an emerging indigenous research paradigm.

THE ONTOLOGICAL ROOTEDNESS OF COGNITIVE PRACTICES LINGUISTIC FORMS IN RELIGIOUS SOCIO-CULTURAL TRADITIONS: A COMPARATIVE APPROACH

Communicology ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 138-148
Author(s):  
NATALIA MALSHINA ◽  
Keyword(s):  
Traditional Approach ◽  
Philosophical Tradition ◽  
Psychological State ◽  
Comparative Approach ◽  
Cultural Traditions ◽  
Fundamental Ontology ◽  
Ontology Language ◽  
The World ◽  
True Knowledge ◽  
The Relationship

This study examines the ontological problems in the aspect of the ratio of different cognitive practices and their mutual conditionality in the context of communication and their socio-cultural prerequisites, which is possible only if the traditional approach to the distinction between epistemology and faith is revised. Based on the idea of identity of common grounds of cognitive practices “belief” is included in the understanding of interpretation in the communicative situation for true knowledge in each of the modes of being. Belief in the philosophical tradition reveals the ontological foundations of hermeneutics. Three reflections are synthesised: the hermeneutic concept of understanding, the structuralist concept of language, and the psychoanalytic concept of personality. It is necessary to apply the method of phenomenological reduction to the ontological substantiation of hermeneutics in the Christian Orthodox tradition. Hence, the very natural seems the meeting of semantics, linguistics, and onomatodoxy, with the ontology language of Heidegger, the origins of which resides in in Husserl phenomenology. Fundamental ontology and linguistics, cult philosophy - both in different ways open the horizons of substantiation of hermeneutics. The beginning of this justification is the hermeneutic problem in Christianity, which has appeared as a sequence of the question of the relationship between the two Covenants, or two Unions. In the paper, the author attempts to identify the stages of constructing the philosophical concept of Pavel Florensky. As a result, the substantiation of the birth of the world in consciousness by the cult is revealed. Ontological tradenote words can be seen in Florensky through symbols. The symbol makes the transition from a small energy to a larger one, from a small information saturation to a greater one, acting as a lumen of being - when by the name we hear the reality. The word comes into contact with the world that is on the other side of our own psychological state. The word, the symbol shifts all the time from subjective to objective. The communicative model acts as a common point uniting these traditions. The religious approach as part of semiotic approach reveals the horizons of ontological conditionality of language and words, and among the words - the name, as the name plays a central role in the accumulation and transmission of information, understanding of the commonality of this conditionality in the concepts of phenomenology and Christian, Orthodox tradition.

scholarly journals Habitat characteristics and life history explain reproductive seasonality in lagomorphs

2021 ◽  
Author(s):  
Sandra A. Heldstab
Keyword(s):  
Life History ◽  
Reproductive Output ◽  
Quantitative Measure ◽  
Habitat Characteristics ◽  
Comparative Approach ◽  
Mean Annual Temperature ◽  
Season Length ◽  
Reproductive Seasonality ◽  
Birth Season ◽  
Birth Seasonality

AbstractLagomorphs show extensive seasonal variation in their reproduction. However, the factors causing this large variation have so far mostly been investigated intraspecifically and therefore provide only some exemplary comparisons of lagomorph reproductive seasonality. The present study applies both a categorical description (birth season categories 1–5) and a quantitative measure (birth season length in months) to summarize the degree of birth seasonality in the wild of 69 lagomorph species. Using a comparative approach, I tested the influence of 13 factors, comprising six habitat, five life history and two allometric variables on birth season length in lagomorphs. Leporids mainly show non-seasonal birthing patterns with high intraspecific variation. Their opportunistic breeding strategy with high reproductive output and their large distribution areas across wide latitude and elevation ranges might be the reasons for this finding. Ochotonids reproduce strictly seasonally, likely because they live at northern latitudes, are high-altitude specialists, and occur in limited distribution areas. The most important factors associated with variation in lagomorph birth seasonality are mid-latitude, mean annual temperature and precipitation of a species’ geographical range and life history adaptations including fewer but larger litters in seasonal habitats. Birth seasons become shorter with increasing latitude, colder temperatures, and less precipitation, corresponding to the decreasing length of optimal environmental conditions. Leporid species with shorter breeding seasons force maternal resources into few large litters to maximise reproductive output while circumstances are favourable. Since allometric variables were only weakly associated with reproductive seasonality, life history adaptations and habitat characteristics determine birth seasonality in Lagomorpha.

Rasāsvāda: A Comparative Approach to Emotion and the Self

2021 ◽  
Vol 26 ◽  
pp. 115-139
Author(s):  
Sthaneshwar Timalsina ◽  
Keyword(s):  
The Self ◽  
Comparative Approach ◽  
Underlying Assumption ◽  
Systematic Philosophy ◽  
Philosophy Of Emotion ◽  
The Relationship ◽  
Rasa Theory

This paper explores the philosophy of emotion in classical India. Although some scholars have endeavored to develop a systematic philosophy of emotion based on rasa theory, no serious effort has been made to read the relationship between emotion and the self in light of rasa theory. This exclusion, I argue, is an outcome of a broader presupposition that the 'self' in classical Indian philosophies is outside the scope of emotion. A fresh reading of classical Sanskrit texts finds this premise baseless. With an underlying assumption that emotion and self are inherently linked, this paper explores similarities between the Indian and Chinese approaches.

Scale-dependent relationships between benthic habitat characteristics and abundances of blacklip abalone, Haliotis rubra (Leach)

2010 ◽  
Vol 61 (11) ◽  
pp. 1227 ◽  
Author(s):  
Elisabeth M. A. Strain ◽  
Craig R. Johnson
Keyword(s):  
Spatial Scale ◽  
Red Algae ◽  
Positive Relationship ◽  
Spatial Scales ◽  
Habitat Characteristics ◽  
Benthic Habitat ◽  
Sessile Invertebrates ◽  
Haliotis Rubra ◽  
The Relationship ◽  
Biotic Characteristics

Habitat characteristics can influence marine herbivore densities at a range of spatial scales. We examined the relationship between benthic habitat characteristics and adult blacklip abalone (Haliotis rubra) densities across local scales (0.0625–16 m2), at 2 depths, 4 sites and 2 locations, in Tasmania, Australia. Biotic characteristics that were highly correlated with abalone densities included cover of non-calcareous encrusting red algae (NERA), non-geniculate coralline algae (NCA), a matrix of filamentous algae and sediment, sessile invertebrates, and foliose red algae. The precision of relationships varied with spatial scale. At smaller scales (0.0625–0.25 m2), there was a positive relationship between NERA and ERA, and negative relationships between sediment matrix, sessile invertebrates and abalone densities. At the largest scale (16 m2), there was a positive relationship between NERA and abalone densities. Thus, for some biotic characteristics, the relationship between NERA and abalone densities may be scalable. There was very little variability between depths and sites; however, the optimal spatial scale differed between locations. Our results suggest a dynamic interplay between the behavioural responses of H. rubra to microhabitat and/or to abalone maintaining NERA free of algae, sediment, and sessile invertebrates. This approach could be used to describe the relationship between habitat characteristics and species densities at the optimal spatial scales.

scholarly journals Nesting strategy shapes territorial aggression but not testosterone: a comparative approach in female and male birds

2020 ◽  
Author(s):  
SE Lipshutz ◽  
KA Rosvall
Keyword(s):  
Tree Swallow ◽  
Comparative Approach ◽  
Female Competition ◽  
American Robin ◽  
Territorial Aggression ◽  
Physical Attack ◽  
Cavity Nesting ◽  
Comparative Framework ◽  
Underlying Mechanisms ◽  
Close Relatives

Our understanding of the proximate and ultimate mechanisms shaping competitive phenotypes primarily stems from research on male-male competition for mates, even though female-female competition is also widespread. Obligate secondary cavity-nesting has evolved repeatedly across avian lineages, providing a useful comparative context to explore how competition over limited nest cavities shapes aggression and its underlying mechanisms across species. Although evidence from one or another cavity-nesting species suggests that territorial aggression is adaptive in both females and males, this has not yet been tested in a comparative framework. We tested the hypothesis that cavity-nesting generates more robust territorial aggression, in comparison to close relatives with less restrictive nesting strategies. Our focal species were two obligate secondary cavity-nesting species and two related species with more flexible nesting strategies in the same avian family: tree swallow (Tachycineta bicolor) vs. barn swallow (Hirundo rustica); Eastern bluebird (Sialia sialis) vs. American robin (Turdus migratorius). We assayed conspecific territorial aggression, and found that cavity-nesting species physically attacked a simulated intruder more often than their close relatives. This pattern held for both females and males. Because territorial aggression is often associated with elevated testosterone, we also hypothesized that cavity-nesting species would exhibit higher testosterone levels in circulation. However, cavity-nesting species did not have higher testosterone in circulation for either sex, despite some correlative evidence that testosterone is associated with higher rates of physical attack in female tree swallows. Our focus on a competitive context that is relevant to both sexes – competition over essential breeding resources – provides a useful comparative framework for co-consideration of proximate and ultimate drivers of reproductive competition in females and males.

What is related to the well-being of the siblings of patients with schizophrenia: An evaluation within the Lazarus and Folkman’s Transactional Stress and Coping Model

2019 ◽  
Vol 65 (3) ◽  
pp. 252-261 ◽  
Author(s):  
Muazzez Merve Avcıoğlu ◽  
Ayşe Nuray Karanci ◽  
Haldun Soygur
Keyword(s):  
Social Support ◽  
Perceived Social Support ◽  
Well Being ◽  
Subjective Well Being ◽  
Social Support Scale ◽  
Burden Scale ◽  
Coping Scale ◽  
Close Relatives ◽  
And Coping ◽  
The Relationship

Background: Schizophrenia is a chronic mental illness that strongly affects not only the patients with schizophrenia, but also their families and close relatives. So far, family research on patients with schizophrenia has mainly focused on parents, but has neglected siblings. Aim: This study aims to evaluate the well-being of 103 siblings of patients with schizophrenia within the Lazarus and Folkman’s Transactional Coping and Stress Model. Materials: A Sociodemographic Information Form, Subjective Well-being Scale, Zarit Caregiver Burden Scale, Multidimensional Perceived Social Support Scale, Ways of Coping Scale and Shortened Perceived Parental Rearing Styles Form were administered to the siblings of patients with schizophrenia. Results: The results of this study revealed that well-being was associated with perceived mother overprotection, perceived social support, problem-focused coping and indirect coping. Social support moderated the relationship between burden and well-being as a buffering factor. Conclusion: Therefore, siblings of patients with schizophrenia should be given access to social support and their problem-focused coping strategies should be strengthened. Besides, parents should be supported to provide suitable care for the siblings of patients with schizophrenia.

scholarly journals The Influence of Prey Availability and Vegetation Characteristics on Scent Station Visitation Rates of Coyotes, Canis latrans, in a Heterogeneous Environment

2004 ◽  
Vol 118 (3) ◽  
pp. 341 ◽  
Author(s):  
Lynda A. Randa ◽  
John A. Yunger
Keyword(s):  
Canis Latrans ◽  
Prey Availability ◽  
Canopy Cover ◽  
Ground Cover ◽  
Heterogeneous Environment ◽  
Visitation Rates ◽  
Foliage Density ◽  
Grassland Habitats ◽  
The Relationship ◽  
Habitat Variables

We investigated the effects of local prey fluctuations and habitat variables on the scent station visitation rates of the Coyote (Canis latrans) in northern Illinois within a heterogeneous environment. Availability of small mammalian prey was assessed by monthly mark-recapture sampling and visual counts conducted along three, 192-m transects in each of seven habitats that ranged from grassland to wooded sites. Habitat metrics, which included foliage density, ground cover, and canopy cover, were also collected for the same seven habitats. Visitation rates of Coyotes were determined from scent station lines parallel to the small mammal trapping transects. A multiple regression analysis indicated that Coyote visitation rates across the study site were influenced positively by vole (Microtus spp.) abundance and negatively by canopy cover. When Coyote visitation rates were regressed on vole abundance for only the habitats in which voles occurred, the relationship was not significant. This may be attributed to the general avoidance of wooded areas by Coyotes. Coyotes did, however, respond to experimentallyinduced abundant patches of Peromyscus. These findings suggest Coyotes selectively use grassland habitats within a heterogeneous environment and may modify their use according to prey availability.

The ontogeny of trilobite segmentation: a comparative approach

Paleobiology ◽  
2006 ◽  
Vol 32 (4) ◽  
pp. 602-627 ◽  
Author(s):  
Nigel C. Hughes ◽  
Alessandro Minelli ◽  
Giuseppe Fusco
Keyword(s):  
Direct Development ◽  
Comparative Approach ◽  
Phase Boundaries ◽  
Free Living ◽  
Ancestral Condition ◽  
Morphological Transitions ◽  
Posterior Trunk ◽  
Close Relatives ◽  
Number Of Segments ◽  
Trunk Segments

Ontogenetic stages of trilobites have traditionally been recognized on the basis of the development of exoskeletal segmentation. The established protaspid, meraspid, and holaspid phases relate specifically to the development of articulated joints between exoskeletal elements. Transitions between these phases were marked by the first and last appearances of new trunk segment articulations. Here we propose an additional and complementary ontogenetic scheme based on the generation of new trunk segments. It includes an anamorphic phase during which new trunk segments appeared, and an epimorphic phase during which the number of segments in the trunk remained constant. In some trilobites an ontogenetic boundary can also be recognized at the first appearance of morphologically distinct posterior trunk segments. Comparison of the phase boundaries of these different aspects of segment ontogeny highlights rich variation in the segmentation process among Trilobita. Cases in which the onset of the holaspid phase preceded onset of the epimorphic phase are here termed protarthrous, synchronous onset of both phases is termed synarthromeric, and onset of the epimorphic phase before onset of the holaspid phase is termed protomeric. Although these conditions varied among close relatives and perhaps even intraspecifically in some cases, particular conditions may have been prevalent within some clades.Trilobites displayed hemianamorphic development that was accomplished over an extended series of juvenile and mature free-living instars. Although developmental schedules varied markedly among species, morphological transitions during trilobite development were generally regular, limited in scope, and extended over a large number of instars when compared with those of many living arthropods. Hemianamorphic, direct development with modest change between instars is also seen among basal members of the Crustacea, basal myriapods, pycnogonids, and in some fossil chelicerates. This mode may represent the ancestral condition of euarthropod development.

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