LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Zurück zur letzten Suche Suchhistorie
Erweiterte Suche

Ihre letzten Suchen

  1. AU="Graham, S. Elizabeth"
  2. AU="Piñero, Fernando L"
  3. AU="LUBAN-PLOZZA, B"
  4. AU="Dewitte, Olivier"
  5. AU="Low, Zhen Luan"
  6. AU="Song, Jin-Ju"
  7. AU="Liu-Xia Zhang"
  8. AU="Ahmed, Abdallah M Said"
  9. AU=Hover Alexander R
  10. AU="Zaniar Ghazizadeh"
  11. AU="Rathod, Aniruddha"
  12. AU=Ong Edison
  13. AU="Hoffmann, Daniela"
  14. AU="Mallett, Garry"
  15. AU=Lemos Pedro A
  16. AU="Bakris, George L."
  17. AU="Tun-Linn Thein"
  18. AU="Michelle Schinkel"
  19. AU="Scolieri, G"

Suchergebnis

Treffer 1 - 6 von insgesamt 6

Suchoptionen

  1. Artikel: Assessing population genetic structure of three New Zealand stream insects using mitochondrial and nuclear DNA markers

    de Araujo Barbosa, Vanessa / Graham, S. Elizabeth / Smith, Brian J. / Hogg, Ian D. / McGaughran, Angela

    Genome. 2022 July 04, v. 65, no. 8

    2022  

    Abstract: Assessing genetic differentiation among natural populations can aid understanding of dispersal patterns and connectivity among habitats. Several molecular markers have become increasingly popular in determining population genetic structure for this ... ...

    Abstract Assessing genetic differentiation among natural populations can aid understanding of dispersal patterns and connectivity among habitats. Several molecular markers have become increasingly popular in determining population genetic structure for this purpose. Here, we compared the resolution of mitochondrial cytochrome c oxidase subunit I (COI) and nuclear single nucleotide polymorphism (SNP) markers for detecting population structure among stream insects at small spatial scales. Individuals of three endemic taxa—Coloburiscus humeralis (Ephemeroptera), Zelandobius confusus (Plecoptera), and Hydropsyche fimbriata (Trichoptera)—were collected from forested streams that flow across open pasture in the North Island of New Zealand. Both COI and SNP data indicated limited population structure across the study area, and small differences observed among these species were likely related to their putative dispersal abilities. For example, fine-scale genetic differentiation between and among neighbouring stream populations for H. fimbriata suggests that gene flow, and hence dispersal, may be more limited for this species relative to the others. Based on the generally similar results provided by both types of markers, we suggest that either COI or SNP markers can provide suitable initial estimates of fine-scale population genetic differentiation in stream insects.
    Schlagwörter Ephemeroptera ; Hydropsyche ; Plecoptera ; gene flow ; genetic variation ; mitochondria ; nuclear genome ; oxidoreductases ; pastures ; population structure ; single nucleotide polymorphism ; streams ; New Zealand
    Sprache Englisch
    Erscheinungsverlauf 2022-0704
    Umfang p. 427-441.
    Erscheinungsort Canadian Science Publishing
    Dokumenttyp Artikel
    ZDB-ID 639031-6
    ISSN 1480-3321 ; 0831-2796
    ISSN (online) 1480-3321
    ISSN 0831-2796
    DOI 10.1139/gen-2022-0021
    Datenquelle NAL Katalog (AGRICOLA)

    Zusatzmaterialien

    Kategorien

    Verfügbar in ZB MED Bonn

    Z 6115: Hefte anzeigen

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  2. Artikel ; Online: Assessing population genetic structure of three New Zealand stream insects using mitochondrial and nuclear DNA markers.

    de Araujo Barbosa, Vanessa / Graham, S Elizabeth / Smith, Brian J / Hogg, Ian D / McGaughran, Angela

    Genome

    2022  Band 65, Heft 8, Seite(n) 427–441

    Abstract: Assessing genetic differentiation among natural populations can aid understanding of dispersal patterns and connectivity among habitats. Several molecular markers have become increasingly popular in determining population genetic structure for this ... ...

    Abstract Assessing genetic differentiation among natural populations can aid understanding of dispersal patterns and connectivity among habitats. Several molecular markers have become increasingly popular in determining population genetic structure for this purpose. Here, we compared the resolution of mitochondrial cytochrome
    Mesh-Begriff(e) Animals ; DNA, Mitochondrial/genetics ; Genetic Markers ; Genetic Variation ; Genetics, Population ; Humans ; Insecta/genetics ; New Zealand ; Rivers
    Chemische Substanzen DNA, Mitochondrial ; Genetic Markers
    Sprache Englisch
    Erscheinungsdatum 2022-07-04
    Erscheinungsland Canada
    Dokumenttyp Journal Article
    ZDB-ID 639031-6
    ISSN 1480-3321 ; 0831-2796
    ISSN (online) 1480-3321
    ISSN 0831-2796
    DOI 10.1139/gen-2022-0021
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

    Verfügbar in ZB MED Köln/Königswinter

    Zs.A 1266: Hefte anzeigen Standort:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  3. Artikel: Integrative analysis of stressor gradients reveals multiple discrete trait‐defined axes underlie community assembly

    Barrett, Isabelle C. / McIntosh, Angus R. / Febria, Catherine M. / Graham, S. Elizabeth / Burdon, Francis J. / Pomeranz, Justin P. F. / Warburton, Helen J.

    Ecosphere. 2022 July, v. 13, no. 7

    2022  

    Abstract: The generalizable functional attributes of organisms (traits) relate strongly to their environment across multiple levels of biological organization, making trait‐based approaches a powerful mechanistic framework to understand species distributions and ... ...

    Abstract The generalizable functional attributes of organisms (traits) relate strongly to their environment across multiple levels of biological organization, making trait‐based approaches a powerful mechanistic framework to understand species distributions and community composition in relation to environmental change. To investigate how a wide range of stressor types shape stream macroinvertebrate communities, we conducted an integrative analysis using community and taxon trait information across drying, flooding, eutrophication, fine sediment, and acid mine drainage (AMD) gradients. Each gradient spanned relatively unimpacted to severely impacted sites. To characterize community change in response to stressors, we incorporated abundance‐based trait information from all stressor gradients in a single trait‐based ordination (nonmetric multidimensional scaling), defining the trait space within which each stressor gradient acted. We hypothesized that different stressors would apply different environmental filters, moving communities along distinct axes in trait space and resulting in communities with definable trait combinations. Particularly strong relationships were associated with anthropogenically derived stressors (fine sediment, eutrophication, and AMD) compared to natural stressors (drying and flooding). Anthropogenic stressors instigated significant movement of communities along multiple axes in trait space, likely driven by limited adaptation to these novel stressors. We demonstrate that trait‐based analysis of communities across multiple stressor gradients can support a more comprehensive understanding of how community composition changes than taxonomic methods or investigation of a single stressor type, and could underpin community‐focused management actions.
    Schlagwörter acid mine drainage ; anthropogenic stressors ; aquatic invertebrates ; community structure ; eutrophication ; sediments
    Sprache Englisch
    Erscheinungsverlauf 2022-07
    Erscheinungsort John Wiley & Sons, Inc.
    Dokumenttyp Artikel
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 2572257-8
    ISSN 2150-8925
    ISSN 2150-8925
    DOI 10.1002/ecs2.4164
    Datenquelle NAL Katalog (AGRICOLA)

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  4. Artikel: Aquatic Macrophytes Alter Metabolism and Nutrient Cycling in Lowland Streams

    O’Brien, Jonathan M / Lessard, Joanna L / Plew, David / Graham, S. Elizabeth / McIntosh, Angus R

    Ecosystems. 2014 Apr., v. 17, no. 3

    2014  

    Abstract: Macrophytes influence the physical, chemical, and biological characteristics of lowland streams, so may be critically important in stream management. We investigated the role of macrophytes in regulating metabolism and nutrient cycling in three lowland, ... ...

    Abstract Macrophytes influence the physical, chemical, and biological characteristics of lowland streams, so may be critically important in stream management. We investigated the role of macrophytes in regulating metabolism and nutrient cycling in three lowland, agricultural streams. We measured stream metabolism over the growing season and following experimental macrophyte removal, and used short-term nutrient additions of phosphate (P) and ammonium to assess macrophyte influences on nutrient uptake. Primary production was closely correlated with macrophyte cover across all streams and dates, and decreased greatly with macrophyte removal, whereas ecosystem respiration was not correlated with macrophyte cover and was not altered by macrophyte removal. Phosphate uptake velocity was negatively related to primary production, suggesting that macrophyte activity actually slowed P uptake. Ammonium uptake was not correlated with macrophyte cover or metabolism metrics. Stream nitrate concentrations typically exceeded concentrations of incoming groundwater, suggesting little net nitrate retention in these macrophyte-dominated streams. Phosphorous demand by macrophytes was 10-fold lower than observed uptake rates, indicating that macrophyte P demand was much lower than that of other stream biota. Nitrogen demand by macrophytes was nearly equal to ammonium uptake and was not sufficient to affect the high nitrate flux. These results indicate that macrophytes drive ecosystem metabolism but have limited influence on water column nutrient concentrations because macrophyte demand is much lower than the supply available from the water column. Thus macrophytes in our streams had a large impact on stream trophic state, but offered little potential to influence nutrient removal via management.
    Schlagwörter biogeochemical cycles ; ecosystem respiration ; growing season ; macrophytes ; metabolism ; nutrient content ; nutrient uptake ; primary productivity ; streams
    Sprache Englisch
    Erscheinungsverlauf 2014-04
    Umfang p. 405-417.
    Erscheinungsort Springer-Verlag
    Dokumenttyp Artikel
    ZDB-ID 1428921-0
    ISSN 1435-0629 ; 1432-9840
    ISSN (online) 1435-0629
    ISSN 1432-9840
    DOI 10.1007/s10021-013-9730-8
    Datenquelle NAL Katalog (AGRICOLA)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Verfügbar in ZB MED Bonn

    Z 6928: Hefte anzeigen

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  5. Artikel: Aquatic Macrophytes Alter Metabolism and Nutrient Cycling in Lowland Streams

    O’Brien, Jonathan M. / Lessard, Joanna L. / Plew, David / Graham, S. Elizabeth / McIntosh, Angus R.

    Ecosystems

    Band v. 17,, Heft no. 3

    Abstract: Macrophytes influence the physical, chemical, and biological characteristics of lowland streams, so may be critically important in stream management. We investigated the role of macrophytes in regulating metabolism and nutrient cycling in three lowland, ... ...

    Abstract Macrophytes influence the physical, chemical, and biological characteristics of lowland streams, so may be critically important in stream management. We investigated the role of macrophytes in regulating metabolism and nutrient cycling in three lowland, agricultural streams. We measured stream metabolism over the growing season and following experimental macrophyte removal, and used short-term nutrient additions of phosphate (P) and ammonium to assess macrophyte influences on nutrient uptake. Primary production was closely correlated with macrophyte cover across all streams and dates, and decreased greatly with macrophyte removal, whereas ecosystem respiration was not correlated with macrophyte cover and was not altered by macrophyte removal. Phosphate uptake velocity was negatively related to primary production, suggesting that macrophyte activity actually slowed P uptake. Ammonium uptake was not correlated with macrophyte cover or metabolism metrics. Stream nitrate concentrations typically exceeded concentrations of incoming groundwater, suggesting little net nitrate retention in these macrophyte-dominated streams. Phosphorous demand by macrophytes was 10-fold lower than observed uptake rates, indicating that macrophyte P demand was much lower than that of other stream biota. Nitrogen demand by macrophytes was nearly equal to ammonium uptake and was not sufficient to affect the high nitrate flux. These results indicate that macrophytes drive ecosystem metabolism but have limited influence on water column nutrient concentrations because macrophyte demand is much lower than the supply available from the water column. Thus macrophytes in our streams had a large impact on stream trophic state, but offered little potential to influence nutrient removal via management.
    Schlagwörter biogeochemical cycles ; metabolism ; nutrient uptake ; macrophytes ; ecosystem respiration ; streams ; primary productivity ; growing season ; nutrient content
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 1432-9840
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  6. Artikel: Riparian Shading Mitigates Stream Eutrophication in Agricultural Catchments

    Burrell, Teresa K. / O'Brien, Jonathan M. / Graham, S. Elizabeth / Simon, Kevin S. / Harding, Jon S. / McIntosh, Angus R.

    Freshwater science

    Band v. 33,, Heft no. 1

    Abstract: Restoration of riparian vegetation is widely recognized as a tool in stream rehabilitation, but information on whether local riparian characteristics can mitigate the effects of catchment-level stressors on in-stream processes is limited. We measured ... ...

    Abstract Restoration of riparian vegetation is widely recognized as a tool in stream rehabilitation, but information on whether local riparian characteristics can mitigate the effects of catchment-level stressors on in-stream processes is limited. We measured community metabolism in 21 streams in the Canterbury region of New Zealand along 2 independent gradients of agricultural intensity and riparian cover (from closed canopied to open canopied) to assess relative effects of landscape and local factors on stream trophic state. We measured stream metabolism with the single-station open-channel diel O₂ method. We found a correlation between gross primary production (GPP) and ecosystem respiration (ER), indicating a gradient of trophic states across sites. Streams were strongly heterotrophic with P:R values varying from 0.01 to 0.25. GPP and ER increased with % agriculture and % macrophyte cover, but decreased with % shade from riparian vegetation. Hierarchical partitioning analysis indicated that % agriculture was the only landuse variable to have a significant independent effect on GPP and ER. Among local variables, % shade and % macrophyte cover had significant independent effects on GPP. Percent shade was the only local variable to have a significant independent effect on ER. Percent shade had a stronger effect on both GPP and ER than did % agriculture, and a trade-off exists between the importance of agricultural and forest cover on stream metabolism at different spatial scales. Our results highlight the role of local riparian conditions in controlling trophic state and the importance of riparian buffers as a tool to mitigate eutrophication in streams and rivers.
    Schlagwörter forests ; agricultural watersheds ; oxygen ; metabolism ; ecosystem respiration ; macrophytes ; primary productivity ; trophic relationships ; rivers ; riparian buffers ; eutrophication ; streams ; landscapes ; shade ; land use
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 2161-9565
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

Zum Seitenanfang