Species sorting in space and time—the impact of disturbance regime on community assembly in a temporary pool metacommunity

2010 ◽  
Vol 29 (4) ◽  
pp. 1267-1278 ◽  
Author(s):  
Bram Vanschoenwinkel ◽  
Aline Waterkeyn ◽  
Merlijn Jocqué ◽  
Liesbet Boven ◽  
Maitland Seaman ◽  
...  
Keyword(s):  
Community Assembly ◽  
Disturbance Regime ◽  
Species Sorting ◽  
Temporary Pool ◽  
Space And Time ◽  
The Impact

Reading Stratigraphical Woodscapes in Thomas Hardy's The Woodlanders

2017 ◽  
Vol 7 (3) ◽  
pp. 210-223
Author(s):  
Anna Burton
Keyword(s):  
Nineteenth Century ◽  
Local History ◽  
Space And Time ◽  
Eighteenth And Nineteenth Centuries ◽  
Geological Work ◽  
Gideon Mantell ◽  
Modes Of Thought ◽  
The Impact ◽  
Visual Cultures

In The Woodlanders (1887), Hardy uses the texture of Hintock woodlands as more than description: it is a terrain of personal association and local history, a text to be negotiated in order to comprehend the narrative trajectory. However, upon closer analysis of these arboreal environs, it is evident that these woodscapes are simultaneously self-contained and multi-layered in space and time. This essay proposes that through this complex topographical construction, Hardy invites the reader to read this text within a physical and notional stratigraphical framework. This framework shares similarities with William Gilpin's picturesque viewpoint and the geological work of Gideon Mantell: two modes of vision that changed the observation of landscape in the eighteenth and nineteenth centuries. This comparative discussion at once reviews the perception of the arboreal prospect in nineteenth-century literary and visual cultures, and also questions the impact of these modes of thought on the woodscapes of The Woodlanders.

scholarly journals Water quality drives the regional patterns of an algal metacommunity in interconnected lakes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Min Sung Kim ◽  
Seok Hyun Ahn ◽  
In Jae Jeong ◽  
Tae Kwon Lee
Keyword(s):  
Water Quality ◽  
Community Assembly ◽  
River Flow ◽  
Geographical Area ◽  
Oxygen Demand ◽  
Algal Community ◽  
Regional Patterns ◽  
Algal Communities ◽  
Species Sorting ◽  
Metacommunity Structure

AbstractThe metacommunity approach provides insights into how the biological communities are assembled along the environmental variations. The current study presents the importance of water quality on the metacommunity structure of algal communities in six river-connected lakes using long-term (8 years) monitoring datasets. Elements of metacommunity structure were analyzed to evaluate whether water quality structured the metacommunity across biogeographic regions in the riverine ecosystem. The algal community in all lakes was found to exhibit Clementsian or quasi-Clementsian structure properties such as significant turnover, grouped and species sorting indicating that the communities responded to the environmental gradient. Reciprocal averaging clearly classified the lakes into three clusters according to the geographical region in river flow (upstream, midstream, and downstream). The dispersal patterns of algal genera, including Aulacoseira, Cyclotella, Stephanodiscus, and Chlamydomonas across the regions also supported the spatial-based classification results. Although conductivity, chemical oxygen demand, and biological oxygen demand were found to be important variables (loading > |0.5|) of the entire algal community assembly, water temperature was a critical factor in water quality associated with community assembly in each geographical area. These results support the notion that the structure of algal communities is strongly associated with water quality, but the relative importance of variables in structuring algal communities differed by geological regions.

scholarly journals Historical contingency impacts on community assembly and ecosystem function in chemosynthetic marine ecosystems

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dimitri Kalenitchenko ◽  
Erwan Peru ◽  
Pierre E. Galand
Keyword(s):  
Community Assembly ◽  
Sea Water ◽  
Marine Ecosystem ◽  
Marine Ecosystems ◽  
Metagenomic Sequencing ◽  
Historical Contingency ◽  
Historical Events ◽  
Species Sorting ◽  
Environmental Selection ◽  
Microbial Community Assembly

AbstractPredicting ecosystem functioning requires an understanding of the mechanisms that drive microbial community assembly. Many studies have explored microbial diversity extensively and environmental factors are thought to be the principal drivers of community composition. Community assembly is, however, also influenced by past conditions that might affect present-day assemblages. Historical events, called legacy effects or historical contingencies, remain poorly studied in the sea and their impact on the functioning of the communities is not known. We tested the influence, if any, of historical contingencies on contemporary community assembly and functions in a marine ecosystem. To do so, we verified if different inoculum communities colonizing the same substrate led to communities with different compositions. We inoculated wood with sea water microbes from different marine environments that differ in ecological and evolutionary history. Using 16S rRNA and metagenomic sequencing, it was demonstrated that historical contingencies change the composition and potential metabolisms of contemporary communities. The effect of historical events was transient, dominated by environmental selection as, over time, species sorting was a more important driver of community assembly. Our study shows not only that historical contingencies affect marine ecosystems but takes the analysis a step further by characterizing this effect as strong but transient.

MESSY FREE-FOR-ALL OR AN “AHA!” MOMENT?: REFLECTIONS ON AN HIV AWARENESS PROGRAM WITH AFRICAN NEWCOMER YOUTH

2021 ◽  
Vol 43 (4) ◽  
pp. 3-7
Author(s):  
Susan Frohlick ◽  
Adey Mohamed
Keyword(s):  
Young People ◽  
Black Community ◽  
Ethnographic Research ◽  
Knowledge To Action ◽  
Design And Implementation ◽  
Space And Time ◽  
White Settler ◽  
Awareness Program ◽  
Hiv Awareness ◽  
The Impact

Abstract This paper traces a collaboration between a White settler anthropologist and Black community liaison and researcher in the design and implementation of HIV awareness strategies. Based on ethnographic research with young people from African newcomer communities who settled in Winnipeg, Canada, their sense that HIV did not exist in Canada was the impetus for our movement of knowledge-to-action. Rather than deliver the facts to them as a passive audience, we created space and time for a series of youth-led conversations that were effective, emotional, corporeal, and socially dynamic. From our respective positionalities, we reflect on the impact of the awareness activity. What at times felt like “a free-for-all” fostered an awareness by the young people, as active agents, of the complexities of HIV as “more than a virus,” especially its racialized underpinnings.

Assessing the Impact of Competition on Community Assembly: A Case Study using Small Mammals

Ecology ◽  
1995 ◽  
Vol 76 (4) ◽  
pp. 1283-1296 ◽  
Author(s):  
Douglas A. Kelt ◽  
Mark L. Taper ◽  
Peter L. Meserve
Keyword(s):  
Small Mammals ◽  
Community Assembly ◽  
The Impact

scholarly journals IMPACT OF MEMENTO VALUE ON THE PERCEPTION OF CULTURAL HERITAGE: CASE STUDY OF THE MODERN MOVEMENT AND DIALECT OF KAUNAS / ATMINTIES VERTĖ SUVOKIANT KULTŪROS PAVELDĄ: MODERNIZMO JUDĖJIMO IR JO KAUNIETIŠKOJO DIALEKTO ATVEJO TYRIMAS

2018 ◽  
Vol 10 (0) ◽  
pp. 1-7
Author(s):  
Huriye Armagan DOGAN
Keyword(s):  
Built Environment ◽  
Cultural Heritage ◽  
Empirical Approach ◽  
The Past ◽  
Space And Time ◽  
The Impact ◽  
Modern Movement

Memento value in heritage is one of the most essential characteristics facilitating the association between the environment and its users, by connecting structures with space and time, moreover, it helps people to identify their surroundings. However, the emergence of the Modern Movement in the architectural sphere disrupted the reflection of memory and symbols which serve to root the society in its language. Furthermore, it generated an approach that stood against the practice of referring to the past and tradition, which led to the built environment becoming homogeneous and deprived of memento value. This paper focuses on the impact of memento value on the perception and evaluation of cultural heritage. Furthermore, it investigates the notions which are perceived to influence the appraisal of cultural heritage by applying them to the Kaunas dialect of the Modern Movement with an empirical approach.

Shari‘a

2015 ◽  
Author(s):  
Devin J. Stewart
Keyword(s):  
Essential Feature ◽  
Legal Education ◽  
Political Islam ◽  
Sacred Text ◽  
Space And Time ◽  
Islamic Thought ◽  
College Of Law ◽  
The Law ◽  
Legal Subjects ◽  
The Impact

This chapter discusses the shari'a, the sacred law of Islam. Law is an essential feature of revealed religion in both the Qur'an and Islamic thought in general, and the term shari'a is used with reference not only to Islam but also to Judaism and Christianity, because all three are conceived as having a divinely given law. According to later jurists, 500 verses of the Qur'an, treat legal subjects, including matters relating to prayer, fasting, alms, pilgrimage, permitted food, marriage, divorce, inheritance, slavery, and trade. This represents roughly one-thirteenth of the sacred text. The chapter covers the law in the books; the source of the law; the two institutions that contributed to making the law central to Islamic societies and creating continuity over space and time: the madhhab, or the legal school and the madrasa, or college of law; legal education and careers; caliphs; judges and muftis; the impact of modernity; and political Islam.

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