Kapfer, J; Audorff, V; Beierkuhnlein, C; Hertel, E: Do bryophytes show a stronger response than vascular plants to interannual changes in spring water quality?, Freshwater Science, 31(2), 625-635 (2012), doi:10.1899/11-037.1 [Link]
Springs are characterized by consistent thermal and hydrologic conditions, which enable use of spring-inhabiting organisms as sensitive indicators of biogeochemical changes in their catchments. We hypothesized that bryophytes would show a stronger response than vascular plants to changes in spring water quality because submerged bryophytes do not take up compounds from the soil. We analyzed species responses to interannual changes in spring water quality (discharge, water temperature, electrical conductivity, and pH) in 57 forest springs over 4 consecutive years. We calculated interannual turnover in species composition for bryophytes and vascular plants with the Bray–Curtis dissimilarity index. We applied regression analysis to test interannual changes in species composition of the taxonomic groups over time, and we used 2-sided t-tests to compare year-to-year changes in species composition between bryophytes and vascular plants. We used boosted regression tree (BRT) models to quantify the relative importance of different physicochemical variables and Pearson linear correlation to quantify short-term changes in vegetation relative to changes in spring-water pH. For both groups, interannual changes in species composition were significantly positively related to time scale. Bryophytes did not show a significantly stronger response than vascular plants to interannual changes in the environment. Alterations in pH and conductivity explained most of the observed interannual changes in species composition of both groups, whereas changes in water temperature and discharge were less important. However, responses of single species to environmental change may be delayed, resulting in inertia at the community and ecosystem scales. Hence, longer time periods need to be considered for a better understanding of response times of the vegetation of European forest springs to changes in spring water quality.
Aktuelle Termine

Fr. 10.07.2020 aktuell
12th BayCEER Workshop 2020: "Call for Abstracts" geöffnet
Do. 22.10.2020
Extreme redox oscillations in freshwater re-flooded acid sulfate soil wetlands: Effects on Fe, S, and trace metals geochemical behavior
Do. 29.10.2020
Dissolved organic matter quality in differently managed forest ecosystems
Do. 05.11.2020
Signaling of rhizosphere microbiome: key for plant health, development and nutrition
Do. 29.10.2020
Neuer Termin: BayCEER Workshop 2020
BayCEER Blog
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
Picky carnivorous plants?
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 976.7 hPa
Lufttemperatur: 12.1 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 3.2 km/h
Wind (Max.): 6.1 km/h
Windrichtung: SO

Globalstrahlung: -6 W/m²
Wind (Höhe 32m): 0.0 km/h

Diese Webseite verwendet Cookies. weitere Informationen