2006
DOI: 10.1002/iroh.200510857
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Seasonal Variability of Particulate Organic Matter in a Mountain Stream in Central Spain

Abstract: The aim of this paper was to study the influence of environmental characteristics of the Mediterranean climate on seasonal variability of particulate organic matter abundance in a mountain stream. Coarse and fine fractions of both suspended and benthic particulate organic matter were determined on 14 occasions between February 1998 and November 1999 in a second-order Mediterranean stream in Central Spain (Arroyo Mediano). Temporal variability of suspended organic matter followed a seasonal pattern, attributed … Show more

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Cited by 7 publications
(7 citation statements)
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“…The most prominent temporal trend during our study was the autumn peak of PM in drift samples. Those observations diverge from results of seston research within Spanish (Molla et al 2006) and Pennsylvania (Richardson et al 2009) streams that evidenced peaking spring/summer PM concentrations, suggesting that spring/summer seston maxima might be a consequence of maximal stream organism activity (i.e., feeding and bioturbation) during warm seasons. In the previous study, Sertić Perić et al (2011) suggested that the autumn-peaking PM trend derives from the typical seasonal die-back of in-stream vegetation, and increased moss fragility caused by lack of protection by tufa accumulation during colder seasons.…”
Section: Patterns Of Particulate Matter Transportcontrasting
confidence: 86%
“…The most prominent temporal trend during our study was the autumn peak of PM in drift samples. Those observations diverge from results of seston research within Spanish (Molla et al 2006) and Pennsylvania (Richardson et al 2009) streams that evidenced peaking spring/summer PM concentrations, suggesting that spring/summer seston maxima might be a consequence of maximal stream organism activity (i.e., feeding and bioturbation) during warm seasons. In the previous study, Sertić Perić et al (2011) suggested that the autumn-peaking PM trend derives from the typical seasonal die-back of in-stream vegetation, and increased moss fragility caused by lack of protection by tufa accumulation during colder seasons.…”
Section: Patterns Of Particulate Matter Transportcontrasting
confidence: 86%
“…Therefore, we focused on baseflow transport of seston and POC. At base flow, seasonal peaks of POC concentration have been attributed to increased macroinvertebrate fragmentation of leaf litter as stream temperature increases (Molla et al 2006). …”
mentioning
confidence: 99%
“…Notwithstanding the increase in average downstream export in high-flow conditions, there was no increase in average downstream suspended particulate concentration across all sites, suggesting that increased discharge rather than concentration was the main driver of the increase in suspended particulate export. Higher discharge and flow velocity increases the capacity of a stream to remove sediment and keep it in suspension (Golladay, 1997;Mollá et al, 2006). We did not sample during storm events-which were virtually absent during our survey period-when suspended particulate export is likely to be the greatest (Wallace et al, 1991;Golladay, 1997).…”
Section: Discussionmentioning
confidence: 94%
“…Higher concentrations of organic suspended particulate in summer compared to winter/autumn may occur due to increased biological activity during the warmer months (Mollá et al, 2006). However, the streams in our study were highly shaded (c. 80%) and water temperature was indistinguishable between seasons (low flow -spring -mean = 11.6 ± 1.5°C SD, high flow -summer -mean = 11.8 ± 2.4°C SD), so there was unlikely to be a large difference in biological activity between seasons.…”
Section: Discussionmentioning
confidence: 98%
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