Vorschaubild nicht verfĂĽgbar
Publikationstyp
Conference proceedings
Monographie
Monographie
Erscheinungsjahr
2016
DOI
Trends and drivers of biodiversity of benthic invertebrates in European freshwaters
Trends and drivers of biodiversity of benthic invertebrates in European freshwaters
Autor:innen
Herausgeber
Quelle
33rd SIL Congress (33. : 2016 : Torino)
Schlagwörter
Zitation
Trends and drivers of biodiversity of benthic invertebrates in European freshwaters, 2016. [online]. Torino. VerfĂĽgbar unter: https://openumwelt.de/handle/123456789/7488
Zusammenfassung englisch
This study includes analyses of trends and drivers of species diversity of benthic invertebrates in European rivers and lakes. The invertebrates were sampled at freshwater monitoring sites in the Czech Republic, Germany, Latvia, Norway, Sweden and the UK. The data includes about 1.8 million benthic macroinvertebrates from 5225 samples in 55 rivers and 34 lakes collected between 1982 and 2014. In addition, data on water chemistry, precipitation and temperature from the same sites and periods are included, where such data exist. The study sites forms part of national monitoring programmes and most represent sites of nutrient poor waters that have been influenced by long-range air pollution leading to acidification and are now in a process of chemical recovery. To our knowledge, no comparable studies on biodiversity exist at this scale.
Over the monitoring period, the concentration of sulphate has decreased, while pH and buffering capacity (ANC) have increased. A majority of the rivers and lakes (70 of 89 sites) show a net increase in species diversity (both richness and Shannon), albeit the increase is not statistically significant for all sites. The biodiversity of lakes has increased to a smaller extent than the biodiversity of rivers.
The biodiversity increase is correlated with sulphate (SO4), pH and monthly minimum temperature. There is no lag between SO4 or pH and a change in biodiversity. For temperature, a lag around one year provides the best fit, suggesting that the temperature now may influence the biodiversity next year. Pressure from acidification also influenced the stability of the biological community in rivers, with greater short-term variation in the invertebrate community during times of higher SO4. Likewise, the stability of the biological community of lakes could be linked to variation in mean monthly precipitation with greater short-term variation during times of low precipitation.
Over the monitoring period, the concentration of sulphate has decreased, while pH and buffering capacity (ANC) have increased. A majority of the rivers and lakes (70 of 89 sites) show a net increase in species diversity (both richness and Shannon), albeit the increase is not statistically significant for all sites. The biodiversity of lakes has increased to a smaller extent than the biodiversity of rivers.
The biodiversity increase is correlated with sulphate (SO4), pH and monthly minimum temperature. There is no lag between SO4 or pH and a change in biodiversity. For temperature, a lag around one year provides the best fit, suggesting that the temperature now may influence the biodiversity next year. Pressure from acidification also influenced the stability of the biological community in rivers, with greater short-term variation in the invertebrate community during times of higher SO4. Likewise, the stability of the biological community of lakes could be linked to variation in mean monthly precipitation with greater short-term variation during times of low precipitation.
A Bayesian model predicts that if European water quality and environment stabilises, then a continued increase in biodiversity across nearly all sites is expected. However, the increase will be counteracted by any further regional increase in temperature.In: Book of Abstracts : 33rdSIL Congress, July 31, 2016 - August 5, 2016, Torino, Italy/ International Society of Limnology, S. 67