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1.
Janne Alahuhta Sarian Kosten Munemitsu Akasaka Dominique Auderset Mattia M. Azzella Rossano Bolpagni Claudia P. Bove Patricia A. Chambers Eglantine Chappuis John Clayton Mary de Winton Frauke Ecke Esperança Gacia Gana Gecheva Patrick Grillas Jennifer Hauxwell Seppo Hellsten Jan Hjort Mark V. Hoyer Christiane Ilg Agnieszka Kolada Minna Kuoppala Torben Lauridsen En Hua Li Balázs A. Lukács Marit Mjelde Alison Mikulyuk Roger P. Mormul Jun Nishihiro Beat Oertli Laila Rhazi Mouhssine Rhazi Laura Sass Christine Schranz Martin Søndergaard Takashi Yamanouchi Qing Yu Haijun Wang Nigel Willby Xiao Ke Zhang Jani Heino 《Journal of Biogeography》2017,44(8):1758-1769
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W. Ellis Penning Marit Mjelde Bernard Dudley Seppo Hellsten Jenica Hanganu Agnieszka Kolada Marcel van den Berg Sandra Poikane Geoff Phillips Nigel Willby Frauke Ecke 《Aquatic Ecology》2008,42(2):237-251
Aquatic macrophytes are one of the biological quality elements in the Water Framework Directive (WFD) for which status assessments
must be defined. We tested two methods to classify macrophyte species and their response to eutrophication pressure: one based
on percentiles of occurrence along a phosphorous gradient and another based on trophic ranking of species using Canonical
Correspondence Analyses in the ranking procedure. The methods were tested at Europe-wide, regional and national scale as well
as by alkalinity category, using 1,147 lakes from 12 European states. The grouping of species as sensitive, tolerant or indifferent
to eutrophication was evaluated for some taxa, such as the sensitive Chara spp. and the large isoetids, by analysing the (non-linear) response curve along a phosphorous gradient. These thresholds
revealed in these response curves can be used to set boundaries among different ecological status classes. In total 48 taxa
out of 114 taxa were classified identically regardless of dataset or classification method. These taxa can be considered the
most consistent and reliable indicators of sensitivity or tolerance to eutrophication at European scale. Although the general
response of well known indicator species seems to hold, there are many species that were evaluated differently according to
the database selection and classification methods. This hampers a Europe-wide comparison of classified species lists as used
for the status assessment within the WFD implementation process. 相似文献
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László G.-Tóth Sandra Poikane W. Ellis Penning Gary Free Helle Mäemets Agnieszka Kolada Jenica Hanganu 《Aquatic Ecology》2008,42(2):265-275
The Water Framework Directive (WFD 2000) defines macrophytes as one of the biological groups required for the ecological assessment of European surface waters. Several
indices for macrophyte assessment have been proposed or are currently in use by different European states. As a first step
towards performing an intercalibration of these indices a common dataset was developed. This dataset contains abundance data
on 789 macrophyte species from 316 different lake sites in ten European countries. Various common species and genera were
identified as indicators of reference and impacted conditions within the dataset. Cluster analysis of macrophyte data, supported
by non-metric multidimensional scaling, indicated that clusters formed were more reflective of their source country rather
than lake type. This might be caused by differences in regional climate, biogeography, monitoring techniques, or a combination
of these factors. A total of six national indices were applied to assign quality classes to the lakes. However, this produced
results that often differed by one or two quality classes for the same site. We foresee that a more precise intercalibration
exercise is necessary, and it should be based on more detailed data considering both seasonality and the latitudinal differences
within the area covered. 相似文献
5.
Peter Dieter Angelika Kolada Sabine Kamionka Alexia Schadow Marietta Kaszkin 《Cellular signalling》2002,14(3):199-204
Lipopolysaccharide (LPS) induces a delayed release (lag phase of 2-4 h) of arachidonic acid (AA) and prostaglandin (PG) D2 in rat liver macrophages. Group IV cytosolic phospholipase A2 (cPLA2) becomes phosphorylated within minutes after the addition of LPS. The phosphorylated form of cPLA2 shows an enhanced in vitro activity. The Ca2+ dependence of cPLA2 activity is not affected by phosphorylation of the enzyme. In addition, LPS induces an enhanced expression of cPLA2 mRNA (after 2-4 h) and an enhanced expression of cPLA2 protein (after 8 h). The cellular cPLA2 activity is enhanced about twofold 24 h after LPS treatment. Liver macrophages constitutively express mRNAs encoding Groups V and IIA secretory PLA2 (sPLA2). LPS has no effect on the levels of Groups V and IIA sPLA2 mRNA expression. Despite mRNA expression, Groups V and IIA sPLA2 protein and sPLA2 activity are not detectable in unstimulated or LPS-stimulated liver macrophages. Collectively, these and earlier [Mediators Inflammation 8 (1999) 295.] results suggest that in liver macrophages the LPS-induced delayed release of AA and prostanoids is mediated by phosphorylation and an enhanced expression of cPLA2, a de novo expression of cyclooxygenase (COX)-2, but not by the actions of Group V or Group IIA sPLA2. 相似文献
6.
Agnieszka Kolada Hanna Ciecierska Joanna Ruszczyńska Piotr Dynowski 《Hydrobiologia》2014,737(1):265-279
According to the Water Framework Directive, the results of the ecological status assessment should be accompanied with estimates of the level of confidence and precision of the determination. The Polish macrophyte-based method for lake assessment (Ecological State Macrophyte Index, ESMI) was tested for its uncertainty. The data from 12 lakes surveyed using four modifications of the sampling procedure, different numbers of transects and by two or three independent surveyors were analysed and the risk of misclassification was estimated. The choice of the sampling technique had no effect on abundance parameters (C max and %cover), but it affected significantly the taxonomic composition indices (H and J′). It did not influence, however, the final assessment result, since in all the methods used, the ESMI values were comparable and showed no significant differences of means. Although the mean ESMI values were statistically indifferent and gave the same assessment result irrespective of the number of transects surveyed, the lower the number of transects, the higher the SD value and the more uncertain the assessment result. The risk of misclassification of the 12 lakes varied from 0.5% to over 40% depending on the sampling standard deviation value and the proximity of the index observed value to the class boundary. 相似文献
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Anne Lyche-Solheim Christian K. Feld Sebastian Birk Geoff Phillips Laurence Carvalho Giuseppe Morabito Ute Mischke Nigel Willby Martin Søndergaard Seppo Hellsten Agnieszka Kolada Marit Mjelde Jürgen Böhmer Oliver Miler Martin T. Pusch Christine Argillier Erik Jeppesen Torben L. Lauridsen Sandra Poikane 《Hydrobiologia》2013,704(1):57-74
Data on phytoplankton, macrophytes, benthic invertebrates and fish from more than 2000 lakes in 22 European countries were used to develop and test metrics for assessing the ecological status of European lakes as required by the Water Framework Directive. The strongest and most sensitive of the 11 metrics responding to eutrophication pressure were phytoplankton chlorophyll a, a taxonomic composition trophic index and a functional traits index, the macrophyte intercalibration taxonomic composition metric and a Nordic lake fish index. Intermediate response was found for a cyanobacterial bloom intensity index (Cyano), the Ellenberg macrophyte index and a multimetric index for benthic invertebrates. The latter also responded to hydromorphological pressure. The metrics provide information on primary and secondary impacts of eutrophication in the pelagic and the littoral zone of lakes. Several of these metrics were used as common metrics in the intercalibration of national assessment systems or have been incorporated directly into the national systems. New biological metrics have been developed to assess hydromorphological pressures, based on aquatic macrophyte responses to water level fluctuations, and on macroinvertebrate responses to morphological modifications of lake shorelines. These metrics thus enable the quantification of biological impacts of hydromorphological pressures in lakes. 相似文献
8.
Bernard Dudley Michael Dunbar Ellis Penning Agnieszka Kolada Seppo Hellsten Alessandro Oggioni Vincent Bertrin Frauke Ecke Martin Søndergaard 《Hydrobiologia》2013,704(1):179-191
Uncertainty is an important factor in ecological assessment, and has important implications for the ecological classification and management of lakes. However, our knowledge of the effects of uncertainty in the assessment of different ecological indicators is limited. Here, we used data from a standardized campaign of aquatic plant surveys, in 28 lakes from 10 European countries, to assess variation in macrophyte metrics across a set of nested spatial scales: countries, lakes, sampling stations, replicate transects, and replicate samples at two depth-zones. Metrics investigated in each transect included taxa richness, maximum depth of colonisation and two indicators of trophic status: Ellenberg’s N and a metric based on phosphorus trophic status. Metrics were found to have a slightly stronger relationship to pressures when they were calculated on abundance data compared to presence/absence data. Eutrophication metrics based on helophytes were found not to be useful in assessing the effects of nutrient pressure. These metrics were also found to vary with the depth of sampling, with shallower taxa representing higher trophic status. This study demonstrates the complex spatial variability in macrophyte communities, the effect of this variability on the metrics, and the implications to water managers, especially in relation to survey design. 相似文献
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Alahuhta Janne Lindholm Marja Bove Claudia P. Chappuis Eglantine Clayton John de Winton Mary Feldmann Tõnu Ecke Frauke Gacia Esperança Grillas Patrick Hoyer Mark V. Johnson Lucinda B. Kolada Agnieszka Kosten Sarian Lauridsen Torben Lukács Balázs A. Mjelde Marit Mormul Roger P. Rhazi Laila Rhazi Mouhssine Sass Laura Søndergaard Martin Xu Jun Heino Jani 《Oecologia》2018,188(4):1167-1182
Oecologia - We studied community–environment relationships of lake macrophytes at two metacommunity scales using data from 16 regions across the world. More specifically, we examined (a)... 相似文献