Multi-scale approach using phytoplankton as a first step towards the definition of the ecological status of reservoirs

Cabecinha, Edna; Cortes, Rui; Cabral, João Alexandre; Ferreira, Maria Teresa; Lourenco, J. N. de P.; Pardal, Miguel Ângelo

doi:10.1016/j.ecolind.2008.04.006

Cited by 54 publications

(29 citation statements)

References 29 publications

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“…There are, however, cases for which paleolimnology alone is inadequate to decipher linkages between watershed alterations and lacustrine ecological processes (Saros 2009). Recently there has been an appeal to integrate neo-and paleolimnological methods to discern relationships between watershed changes and ecological processes, and to use historical chemical data to validate paleolimnological results (Battarbee et al 2005;Saros 2009;Cabecinha et al 2009;Woodridge et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Diatom assemblages in a reservoir sediment core track land-use changes in the watershed

et al. 2015

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Diatom assemblages in a 144-cm sediment core reliably chronicled watershed changes and modifications of a riverine water-source reservoir in northeastern Ohio (USA) between 1932 and 2005. Non-metric Multidimensional Scaling segregated diatom assemblages into six groups that correspond to known anthropogenic modifications in the watershed and reservoir: zone I (filling, 1932-1936), zone II (high farming activity, [1937][1938][1939][1940][1941][1942][1943][1944][1945][1946][1947][1948][1949], zone III (declining farm activity and increased residential development, 1950-1976), zone IV (implementation of sewage bypass, 1977-1982), reduced development activity caused by economic recession, 1983-1993), zone VI (renewed population growth and construction of a dam extension, 1994-2005). Ten watershed and reservoir environmental variables (percent farmland, population, pH, total alkalinity, total hardness, transparency, surface area, air temperature, export of suspended solids, total phosphorus) were significantly correlated with diatom aggregate distribution in ordination space. Changes in species composition, in concert with watershed and reservoir changes, implicated light, alkalinity, and littoral macrophyte development as the primary drivers of diatom aggregate structure and function. Diatom productivity did not track nutrient loading (TP) and was likely driven by factors other than nutrients. Each zone was defined by a distinct set of environmental variables that differed from all other zones. Thus, diatom aggregate structure likely was determined by a dynamic suite of factors in the watershed and reservoir that had differential effects on diatom aggregate structure through time.

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Section: Introductionmentioning

confidence: 99%

Diatom assemblages in a reservoir sediment core track land-use changes in the watershed

et al. 2015

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“…This extensive geographic area represents a wide range in physical and chemical characteristics, soil use and anthropogenic pressure, including both good and poor water quality conditions. A recent analysis of these data showed that phytoplankton community composition differed markedly between high altitude and lowland reservoirs (Cabecinha et al, 2009); hence, these two reservoir groups were analysed separately here. The two groups comprise: Type 1-lowland ''run-of-river'' reservoirs located in the main rivers (Douro and Tagus), with a very short residence time (n = 10); Type 2-deeper high altitude reservoirs, largely located in tributaries, with long residence time (n = 24) (Fig.…”

Section: Study Areamentioning

confidence: 99%

“…The sampling periodicity was carried out on an annual base for 58% of the reservoirs. The remaining reservoirs were visited biannually (27%) and triennially (15%) (Cabecinha et al, 2009). All the samples were collected at 100 m from the reservoirs's crest, at two different depths: (a) near the surface (approximately 0.5 m depth); and (b) near the bottom (2 m above bottom, only for environmental parameters and chlorophyll a).…”

Section: Environmental Parameters and Chlorophyll Amentioning

confidence: 99%

Ecological relationships between phytoplankton communities and different spatial scales in European reservoirs: implications at catchment level monitoring programmes

et al. 2009

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Phytoplankton communities are structured by factors acting over temporal and spatial scales. Identifying which factors are driving spatial patterns in aquatic communities is the central aim of ecology. In this study, data sets of phytoplankton communities and environmental data of two Portuguese reservoirs types (lowland ''riverine reservoirs'' and higher altitude ''artificial lake reservoirs'') were used to determine the importance of environmental variables at different spatial (geographical, regional and local) and time scales (seasons, years) on the community structure. In all the data sets, the multivariate ordination technique Canonical Correspondence Analysis (CCA) showed that regional and local scales explained the majority (9-18% and 13-19%, respectively) of the taxa variance. However, for ''riverine reservoirs'', time variables were more important, explaining 27% of the variability in phytoplankton assemblages. Variance partitioning was used to assess the individual importance of the three spatial scales and time for the community structure of the two reservoir types. The majority of among-site variability (5.9-21.4%) was accounted for by time variables, with local, regional, and geographical scale variables accounting for 3.3-5.6%, 3.7-4.5% and 2.6-2.9%, respectively. The effects of different spatial scales on phytoplankton communities were clearly interrelated; thus, implying that phytoplankton assemblages are capable of detecting stress from catchment to site scales.Handling editor: J. Padisak Electronic supplementary material The online version of this article

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“…Due to their short life cycle, planktonic algae are sensitive to respond quickly to a broad range of stressors, and thus an ideal indicator for water quality (Domingues and Galva˜o, 2007;Cabecinha et al, 2009). The investigation of the phytoplankton community has become an important part of the overall waterquality monitoring (Majaneva et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

A comparison of phytoplankton assemblages generated by two sampling protocols in a German lowland catchment

Schmalz

Fohrer

2011

Ann. Limnol. - Int. J. Lim.

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-Research in the phytoplankton community has become an important part of the overall water-quality monitoring. However, to date studies in small rivers and streams were still scarce and sampling methods were also diverse and not as well developed as in lakes or large rivers. We investigated whether two sampling protocols collected different phytoplankton assemblages within a lowland catchment and, consequently, influenced the outcome of bio-assessment. Data collected from 77 sites by plankton net (PLNET) collection and sedimentation (SEDIM) protocols were analyzed. Median Bray-Curtis (BC) similarity between phytoplankton assemblages generated by the two protocols was 48.5% (range: 7.5-82.0%), and sites with the lowest BC similarities tended to have lower chlorophyll a (Chl a), water temperature (WT), total suspended solid (TSS) and volatile suspended solid (VSS), but higher channel width and water depth, than other sites with higher BC similarities. Reduced total algal density and biomass, but higher species richness, were observed by the PLNET protocol. However, overall phytoplankton assemblages generated by the two protocols were similar, as indicated by dominant species (paired t-test, P > 0.05) and non-metric multidimensional scaling (NMDS) ordination. Nevertheless, from the phytoplankton-based bio-assessment point of view, PLNET protocol was a better method compared with SEDIM protocol because algal data collected by PLNET protocol had higher relationship with environmental variables as indicated by 'Correlation Index' (CoI), Cumulative_R 2 and canonical correspondence analysis (CCA).

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Multi-scale approach using phytoplankton as a first step towards the definition of the ecological status of reservoirs

Cited by 54 publications

References 29 publications

Diatom assemblages in a reservoir sediment core track land-use changes in the watershed

Diatom assemblages in a reservoir sediment core track land-use changes in the watershed

Ecological relationships between phytoplankton communities and different spatial scales in European reservoirs: implications at catchment level monitoring programmes

A comparison of phytoplankton assemblages generated by two sampling protocols in a German lowland catchment

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