scholarly journals Be careful with ecological associations

Nephrology ◽  
2021 ◽  
Author(s):  
Stefanos Roumeliotis ◽  
Samar Abd ElHafeez ◽  
Kitty J. Jager ◽  
Friedo W. Dekker ◽  
Vianda S. Stel ◽  
...  
Keyword(s):  
Ecological Associations

Patterns of Evolution of the Ediacaran Soft-Bodied Biota

2014 ◽  
Vol 88 (2) ◽  
pp. 269-283 ◽  
Author(s):  
Dmitriy Grazhdankin
Keyword(s):  
High Energy ◽  
Ecosystem Engineering ◽  
Low Energy ◽  
Geological Time ◽  
Time Intervals ◽  
Inner Shelf ◽  
Sedimentary Environments ◽  
Burrowing Activity ◽  
Ecological Associations ◽  
Channel Systems

When each of the Avalon-, Ediacara-, and Nama-type fossil assemblages are tracked through geological time, there appear to be changes in species composition and diversity, almost synchronized between different sedimentary environments, allowing a subdivision of the late Ediacaran into the Redkinian, Belomorian and Kotlinian geological time intervals. The Redkinian (580–559 Ma) is characterized by first appearance of both eumetazoan traces and macroscopic organisms (frondomorphs and vendobionts) in a form of Avalon-type communities in the inner shelf environment, whereas coeval Ediacara-type communities remained depauperate. The Belomorian (559–550 Ma) is marked by the advent of eumetazoan burrowing activity in the inner shelf, diversification of frondomorphs, migration of vendobionts from the inner shelf into higher energy environments, and appearance of tribrachiomorphs and bilateralomorphs. Ediacaran organisms formed distinctive ecological associations that coexisted in the low-energy inner shelf (Avalon-type communities), in the wave- and current-agitated shoreface (Ediacara-type communities), and in the high-energy distributary systems (Nama-type communities). The Kotlinian (550–540 Ma) witnessed an expansion of the burrowing activity into wave- and current-agitated shoreface, disappearance of vendobionts, tribrachiomorphs and bilateralomorphs in wave- and current-agitated shoreface, together with a drop in frondomorph diversity. High-energy distributary channel systems of prodeltas served as refugia for Nama-type communities that survived until the end of the Ediacaran and disappeared when the burrowing activity reached high-energy environments. This pattern is interpreted as an expression of ecosystem engineering by eumetazoans, with the Ediacaran organisms being progressively outcompeted by bilaterians.

Recognition of larvae of the Tetrabothriidae (Eucestoda): implications for the origin of tapeworms in marine homeotherms

1987 ◽  
Vol 65 (4) ◽  
pp. 997-1000 ◽  
Author(s):  
Eric P. Hoberg
Keyword(s):  
Life History ◽  
Phylogenetic Relationships ◽  
Host Switching ◽  
Larval Morphology ◽  
Dominant Group ◽  
Marine Birds ◽  
Marine Communities ◽  
Definitive Evidence ◽  
Life History Patterns ◽  
Ecological Associations

The Tetrabothriidae represent the dominant group of cestodes, previously known only as adult parasites, in marine birds and mammals. Recognition of their unique plerocercoid larvae provides the first definitive evidence for life history patterns and phylogenetic relationships with other cestodes. Affinities of the Tetrabothriidae and Tetraphyllidea, cestodes of elasmobranchs, are indicated by larval morphology and ontogeny. However, patterns of sequential heterochrony in the ontogeny of the adult scolex of Tetrabothrius sp. appear to be unique among the Eucestoda. Tetrabothriids constitute a fauna that originated by host switching from elasmobranchs to homeotherms, via ecological associations, following invasion of marine communities by birds and mammals in the Tertiary.

scholarly journals Individual- and area-level predictors of self-harm repetition

2006 ◽  
Vol 189 (5) ◽  
pp. 416-421 ◽  
Author(s):  
Amy Johnston ◽  
Jayne Cooper ◽  
Roger Webb ◽  
Navneet Kapur
Keyword(s):  
Employment Status ◽  
Outcome Measure ◽  
Psychiatric Treatment ◽  
Individual Characteristics ◽  
Individual Factors ◽  
Ecological Studies ◽  
White Ethnicity ◽  
Self Harm ◽  
Ecological Associations ◽  
The Relationship

BackgroundNo ecological studies have examined the relationship between area characteristics, individual characteristics and self-harm repetition.AimsTo investigate the association between area-level factors and incidence and repetition of self-harm, and to identify which area-level factors are independently associated with repetition after adjustment for individual factors.MethodProspective cohort study using the Manchester Self-Harm database. Adults who were resident in Manchester and presented to an emergency department following self-harm between 1997 and 2002 were included (n=4743). The main outcome measure was repeat self-harm within 6 months of the index episode.ResultsFour individual factors (previous self-harm, previous psychiatric treatment, employment status, marital status) and one area-based factor (proportion of individuals who were of White ethnicity) were independently associated with repetition.ConclusionsRepetition of self-harm may be more strongly related to individual factors than to area characteristics. We need to better understand the processes underlying ecological associations with suicidal behaviour before embarking on area-based interventions.

Veligers of the invasive Asian clam Corbicula fluminea in the Columbia River Basin: Broadscale distribution, abundance, and ecological associations

2017 ◽  
Vol 33 (3) ◽  
pp. 234-248 ◽  
Author(s):  
Whitney Hassett ◽  
Stephen M. Bollens ◽  
Timothy D. Counihan ◽  
Gretchen Rollwagen-Bollens ◽  
Julie Zimmerman ◽  
...  
Keyword(s):  
River Basin ◽  
Columbia River ◽  
Corbicula Fluminea ◽  
Columbia River Basin ◽  
Asian Clam ◽  
Clam Corbicula ◽  
Ecological Associations

scholarly journals Trypanosoma cruzi lineage-specific serology: new rapid tests for resolving clinical and ecological associations

2019 ◽  
Vol 5 (10) ◽  
pp. FSO422 ◽  
Author(s):  
Tapan Bhattacharyya ◽  
Niamh Murphy ◽  
Michael A Miles
Keyword(s):  
Trypanosoma Cruzi ◽  
Rapid Tests ◽  
Ecological Associations

scholarly journals Ecological associations among epidermal microstructure and scale characteristics of Australian geckos (Squamata: Carphodactylidae and Diplodactylidae)

2019 ◽  
Vol 234 (6) ◽  
pp. 853-874 ◽  
Author(s):  
Jendrian Riedel ◽  
Matthew J. Vucko ◽  
Simone P. Blomberg ◽  
Simon K. A. Robson ◽  
Lin Schwarzkopf
Keyword(s):  
Scale Characteristics ◽  
Ecological Associations
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