mw. A. (Alejandra) Goldenberg Vilar MSc


  • Faculteit der Natuurwetenschappen, Wiskunde en Informatica
    IBED
  • POSTBUS  94248
    1090 GE  Amsterdam
    Kamernummer: C4.207
  • a.goldenbergvilar@uva.nl
    T:  0205258294
    T:  0205258220

Drivers for Spatial Patterns of Biodiversity in Benthic algal communities in Noord Holland Province

Research team: Alejandra Goldenberg - UvA (PhD student); Merrin Whatley - UvA (PhD student); Wim Admiraal - UvA (Promotor); Harm van der Geest - UvA (Co-promotor); Herman van Dam - Adviseur Water en Natuur; Gert van Ee - HHNK ; Emiel Nat - Stichting Waterproef; Ron van Leuken - Stichting Waterproef

Project Summary

The surface waters of Noord-Holland (mostly located below sea level) are predominantly man-made and shallow. From long term monitoring programmes it is concluded that the diversity of macroinvertebrates, macrophytes and attached micro-algae in these shallow waters has decreased consistently over the last decades (van Dam, 2009). Most ofthese organisms are part of the benthic system (i.e. connected to the sediments) and therefore it is expected that processes at the sediment water interface (like nutrient cycling, oxygen consumption or sediment stabilization) may be key drivers for the distribution of these organisms. Next to these sediment associated processes, organisms are also strongly influenced by water characteristics like salinity, temperature or nutrient concentrations. This study sets out to identify the drivers of spatial distributions and biodiversity in the benthic algal communities of Noord-Holland. By analyzing these drivers we aim to provide insight in the reasons for the decline in biodiversity. In addition, it is expected that based on the obtained insights, predictions can be made about the potential impact of management activities aiming to restore biodiversity as well as to evaluate and optimize monitoring strategies.

The effect of suspended particles on the development of freshwater phototrophic biofilms (October - February 2011)

Simon Bichebois (Universidad Autonoma Madrid); Alejandra Goldenberg (UvA); Harm van der Geest (UvA) and Wim Admiraal (UvA)

Twenty five years of monitoring data from North Holland peatlands indicates a trend of declining biodiversity in benthic algal communities suffering from rapid silt accumulation due to peat degradation. Although several authors have reported on the negative effects of siltation on benthic algae, the majority of these studies focused on the associated stressors such as light attenuation or nutrient enrichment. However, by smothering and clogging, suspended particles also affect the physical structure, and itis hypothesized, that thisresults in a decrease in the micro-niches present in the complex spatial arrangement of the biofilm, leading to a shift from a vertically organized system towards a community dominated by a less diverse group of algal morphotypes. To test this hypothesis, this study investigated the effect of suspended particles using naturally colonized benthic algal communities from two different environments (turbid peatlands and clear rainwater fed ponds). These communities were exposed to different concentrations of suspended particles under constant nutrient and light regimes during a five week laboratory experiment.

Spatial distribution of diatom species in degraded peatlands: Comparison of two ecologically contrasting systems (March - Juy 2011)

Soraya Alvarez (Universidad Autónoma Madrid); Alejandra Goldenberg (UvA); Harm van der Geest (UvA) and Wim Admiraal (UvA)

Diatom species turnover at local scales. Implications for biological monitoring (March - August 2012)

Giulia Sileno (UvA), Alejandra Goldenberg (UvA), Harm van der Geest (UvA) and Wim Admiraal (UvA).

Goldenberg Vilar A., van Dam, H., van Loon, E.E., Vonk, J.A., van der Geest, H. & Admiraal, W. (2014). Eutrophication decreases distance decay of similarity in diatom communities. Freshwater Biology. doi:10.1111/fwb.12363

 

Goldenberg Vilar A., Sileno, G., Alvarez, S., van Dam, H., van Loon, E.E., Vonk, J.A., van der Geest, H. & Admiraal, W. (2014). Effects of sampling design on estimating species-area relationship for freshwater diatom communities. Submitted.

 

Goldenberg Vilar A., van Dam, H.,  Vonk, J.A., van der Geest, H. & Admiraal, W.  (2014). Typology of diatom communities in the Dutch delta: uncovering the environmental drivers in nutrient rich ditches. Submitted.

 

Goldenberg Vilar A., Bichebois, S.,  van der Geest, H. & Admiraal, W. (2014). Suspended organic particles drive the development of attached algal communities in degraded peatlands.Submitted

 

 

 

International Diatom Symposium (IDS) Ghent 2012

Spatial patterns of diatom diversity in modified peatlands. Comparison of three ecologically contrasting systems. Oral presentation 

Nederlandse Vlaamse Kring Van Diatomisten (NVKD) Groningen 2012

Spatial patterns of diatom diversity in modified peatlands. Comparison of three ecologically contrasting systems. Oral presentation

 

ILOW Innovatie Symposium 2011

Goldenberg, A., Kreike, A., van Leuken, R., van Ee, Gert., Nat, E.,van der Geest,  H., Admiraal, W., van Dam, H. Testing distribution patterns of diatom species to improve biological monitoring. Poster

SEFS 7 2011

Goldenberg, A., Bichebois, S., van der Geest, H., Admiraal, W. The effect of suspended particles on freshwater phototrophic biofilms. Poster

 

7th International Symposium "Use of Algae for Monitoring Rivers" 2009

Goldenberg, A., Kreike, A., Admiraal, W. & Dam, H. van (2009). Testing substrate stability as a main driver of diatom growth form in artificial lowland waters. Poster

2011

  • A. Goldenberg Vilar, S. Bichebois, H.G. van der Geest & W. Admiraal (2011). The effect of suspended particles on freshwater phototrophic biofilms. In SEFS.

2011

  • A. Goldenberg Vilar, R. van Leuken, E. Nat, G. van Ee, H. van Dam, H.G. van der Geest & W. Admiraal (2011). Testing Distribution patterns of Diatom Species to Improve Biological Monitoring. In ILOW.
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