Benthic organic matter dynamics in an intermittent stream in South-East Spain

Martinez, Bernardo.; Velasco, Josefa; Suárez, Luisa Paz Rodríguez; Vidal-Abarca, Rosario

doi:10.1127/archiv-hydrobiol/141/1998/303

Cited by 32 publications

(25 citation statements)

References 38 publications

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“…Heterogeneity of channel structure and current velocity create obstructions and slack water areas that enhance retention efficiencies of streams (Speaker et al, 1984), and also substrate characteristics significantly influence the retention of all sizes of seston (Webster et al, 1987). Martinez et al (1998) found high spatial variation in the amounts of benthic particulate organic matter (BPOM) and its various size fractions consistent with high spatial morphological heterogeneity in the fourth-order Chicamo stream in Spain. Site specific variables determined the production, retention and storage of different BPOM fractions in the streambed.…”

Section: Influence Of Hydrology and Seston Load On The Distribution Omentioning

confidence: 88%

The distribution and turnover of benthic organic matter in a lowland river: influence of hydrology, seston load and impoundment

Wanner

Ockenfeld

Brunke

et al. 2002

River Research & Apps

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The standing stocks of benthic organic matter (BOM) and some of its biochemical compounds (particulate organic carbon, particulate nitrogen, protein, and chlorophyll a) were investigated in the upper 12 cm of the sediments at several sampling sites in a free-flowing and in an impounded river section of the lowland River Spree (Germany). Several environmental variables were recorded, in order to determine their potential influence on the organic matter content in the sediments. It was shown that the organic matter content in the upper sediment layers was mainly determined by the local hydrological regime, which was best reflected by the particle size distribution at the sampling sites. For the deepest investigated sediment strata, no influencing factors could be determined. The amount and quality of suspended matter was of minor importance to sediment composition. Also seasonal effects could not be detected.The impounded river section exhibited less seasonal variation in organic matter storage, as well as shorter carbon turnover lengths, longer carbon turnover times and lower rates of annual organic matter recycling than the free-flowing river section, which indicates that changes in river hydraulics result in alterations to the organic matter budget. These alterations could be related to the changed mesohabitat composition and to the higher standing stocks of organic matter in the impounded river reach. We conclude that both morphological and hydrological alterations affect the structure and function of running water ecosystems because of their negative effect on the organic matter cycling.

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Section: Influence Of Hydrology and Seston Load On The Distribution Omentioning

confidence: 88%

The distribution and turnover of benthic organic matter in a lowland river: influence of hydrology, seston load and impoundment

Wanner

Ockenfeld

Brunke

et al. 2002

River Research & Apps

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“…Samplings were conducted in the first 150 m of the stream (permanent surface water flow). Aquatic primary producers in the sampling site include the macrophyte Chara vulgaris (mainly in pools), an extensive diatom assemblage on fine sediments, and epilithic periphyton, although in spring filamentous green algae tend to predominate (Martínez et al 1998, Velasco et al 2003. During the study, G. holbrooki co-existsed in Chicamo with the fish species Luciobarbus sclateri (Günther, 1868) and Aphanius iberus (Valenciennes, 1846).…”

Section: Study Areamentioning

confidence: 99%

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Ruiz‐Navarro¹,

Moreno-Valcárcel²,

Torralva³

et al. 2011

Aquat. Biol.

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Knowledge of the adaptive ability of the highly invasive fish Gambusia holbrooki to new habitats is essential for determining its invasion potential. Our main objective was to assess the life-history of G. holbrooki in saline streams by studying its abundance, size and age structure, growth and condition. Two populations inhabiting similar streams of different salinity in the southeastern Iberian Peninsula were monitored over a 2 yr period. In both populations, the lifehistory of the species was characterized by a short life span, a long recruitment period with a massive emergence of young-of-the-year and fast growth of individuals during the first months of their lives. The species showed a less intense recruitment (6.9% of juveniles vs. 46.4% during the recruitment period) and an earlier end of the recruitment period (at least 2 mo) in the hypersaline system, although abundance, hepatic condition and female somatic condition were higher. In addition, temporary increases in salinity diminished population abundance, recruitment, and somatic and hepatic condition. Both populations showed similar seasonal abundance variation patterns, population structures, growth rates, and somatic and hepatic condition cycles. Other environmental factors independent of salinity could have influenced the differentiation in lifehistory of the species between populations, thus disguising direct relationships between salinity and life-history. However, the studied parameters show that G. holbrooki presents a great ability to adapt to lotic systems with high and different levels of salinity. KEY WORDS: Gambusia holbrooki · Invasive success · Salinity · Population dynamics · Growth · ConditionResale or republication not permitted without written consent of the publisher

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“…More recently, research has focused on natural saline streams in semiarid southern Spain. These studies highlighted the ecological and biogeographical interests in terms of physico-chemical features (Martínez et al 1998;Moreno et al 1995;Vidal-Abarca et al 2001, 2002, primary production (Suárez and Vidal-Abarca 2000;Velasco et al 2003;Gutiérrez-Cánovas et al 2009), secondary production (Barahona et al 2005;Perán et al 1999), invertebrate taxa (Gallardo-Mayenco 1994; Moreno et al 1997Moreno et al , 2004Ribera 2000;Velasco et al 2006), aquatic flora (Aboal 1986(Aboal , 1988Aboal and Fletcher 1996;Moreno et al 2001), the effects of floods on macroinvertebrate communities (Ortega et al 1991), their conservation value (Gómez et al 2005) and the genetics of endangered aquatic coleoptera . The present study is the first that quantifies the seasonal dynamics of a natural saline stream through the analysis of macroinvertebrate community structure.…”

Section: Introductionmentioning

confidence: 99%

Seasonal dynamics of macroinvertebrate communities in a semiarid saline spring stream with contrasting environmental conditions

2009

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Semiarid saline streams are rare aquatic ecosystem types. Their constituent biota is expected to have adapted evolutionarily to strong hydrological variability and salinity stress; however, their ecology is not well known. In this study, we quantify the seasonal changes in the structure of the macroinvertebrate community in the Reventón Rambla (south-eastern Spain), a permanent saline spring stream which is included in a drainage system consisting of ephemeral dry channels (so-called ''ramblas''). Seasonal patterns of community structure were studied in two reaches with contrasting environmental regimes using univariate and multivariate statistics. The upstream site showed more stable environmental conditions than the downstream site, and both sites also differed with regard to species richness, and structural and functional group attributes. On a seasonal basis, community dissimilarity was high during periods when both sites were isolated during summer droughts but dissimilarity decreased when both sites were connected through surface flow. Furthermore, the communities tended to show cyclical trajectories in multivariate ordination space. Rather than being related to salinity stress, these patterns seemed to track the hydrological disturbance regime of this rambla system. Spates tended to disrupt communities, while signs of recovery were evident during low-flow periods. Results suggest that salinity fluctuation does not pose a severe abiotic constraint to these adapted macroinvertebrate communities. Their suits of functional properties provide them with the necessary traits to recover quickly from natural disturbance. While human-caused salinization of streams severely impacts communities eventually reducing their recovery potential, our results suggest that communities in natural saline streams may show similar responses to hydrological disturbance as communities from non-saline streams.

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Benthic organic matter dynamics in an intermittent stream in South-East Spain

Cited by 32 publications

References 38 publications

The distribution and turnover of benthic organic matter in a lowland river: influence of hydrology, seston load and impoundment

The distribution and turnover of benthic organic matter in a lowland river: influence of hydrology, seston load and impoundment

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Seasonal dynamics of macroinvertebrate communities in a semiarid saline spring stream with contrasting environmental conditions

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Benthic organic matter dynamics in an intermittent stream in South-East Spain

Cited by 32 publications

References 38 publications

The distribution and turnover of benthic organic matter in a lowland river: influence of hydrology, seston load and impoundment

The distribution and turnover of benthic organic matter in a lowland river: influence of hydrology, seston load and impoundment

Life-history traits of the invasive fish Gambusia ­holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Seasonal dynamics of macroinvertebrate communities in a semiarid saline spring stream with contrasting environmental conditions

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Resources

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Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?