Growth of a Stream-Dwelling Caddisfly (Olinga feredayi:Conoesucidae) on Surface and Hyporheic Food Resources

Burrell, Greg; Ledger, Mark E.

doi:10.2307/1467980

Cited by 18 publications

(14 citation statements)

References 55 publications

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“…They can form a major component of the diet of predatory meiofauna, macroinvertebrates and small and juvenile fish (Mann, 1997). In some studies, stream invertebrates have been shown to be heavily reliant on the hyporheos as a source of food (Burrell and Ledger, 2003). For some New Zealand streams, up to 76% of the annual production of individual taxa was derived from the HZ (Collier et al, 2004).…”

Section: Processing Of Organic Matter and Trophic Cascadingmentioning

confidence: 99%

Inter‐disciplinary perspectives on processes in the hyporheic zone

et al. 2010

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International audienceThe interface between groundwater and surface water within riverine/riparian ecosystems--the hyporheic zone (HZ)--is experiencing a rapid growth of research interest from a range of scientific disciplines, often with different perspectives. The majority of the multi-disciplinary research aims to elucidate HZ process dynamics and their importance for surface water and groundwater ecohydrology and biogeochemical cycling. This paper presents a critical inter-disciplinary review of recent advances of research centred on the HZ and highlights the current state of knowledge regarding hydrological, biogeochemical and ecohydrological process understanding. The spatial and temporal variability of surface water and groundwater exchange (hyporheic exchange flows), biogeochemical cycling and heat exchange (thermal regime) are considered in relation to both experimental measurements and modelling of these phenomena. We explore how this knowledge has helped to increase our understanding of HZ ecohydrology, and particularly its invertebrate community, the processing of organic matter, trophic cascading and ecosystem engineering by macrophytes and other organisms across a range of spatial and temporal scales. In addition to providing a detailed review of HZ functions, we present an inter-disciplinary perspective on how to advance and integrate HZ process understanding across traditional discipline boundaries. We therefore attempt to highlight knowledge gaps and research needs within the individual disciplines and demonstrate how innovations and advances in research, made within traditional subject-specific boundaries (e.g. hydrology, biochemistry and ecology), can be used to enhance inter-disciplinary scientific progress by cross-system comparisons and fostering of greater dialogue between scientific disciplines

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Section: Processing Of Organic Matter and Trophic Cascadingmentioning

confidence: 99%

Inter‐disciplinary perspectives on processes in the hyporheic zone

et al. 2010

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“…Despite the potential for invertebrates to avoid the harmful effects of water temperature and/or biotic interactions by migrating into the hyporheic zone, their survival, effects on ecosystem function (e.g., leaf litter decomposition) and physiology may be jeopardized because hyporheic food resources are often limited or of poor quality (Hervant et al 1997;Burrell and Ledger 2003;Danger et al 2012). For example, Danger et al (2012) found that buried leaf litter had lower nutritional quality and palatability than on the surface.…”

Section: Introductionmentioning

confidence: 99%

Gammarus pulex (Crustacea: Amphipoda) avoids increasing water temperature and intraspecific competition through vertical migration into the hyporheic zone: a mesocosm experiment

et al. 2016

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The saturated interstices below and adjacent to the riverbed (i.e., the hyporheic zone) can be a refuge for biota during low flows, flow cessation and river drying. Prior to complete drying, organisms are constrained by abiotic and biotic factors (e.g., water temperature, competition) and may respond through vertical migration into the hyporheic zone. However, it remains unclear when temperature and competition become harsh enough to trigger migration. Furthermore, potential consequences of using the hyporheic zone, which is often food-limited, on the survival, effects on ecosystem function and physiology of organisms are unknown. We tested the hypotheses that (1) Gammarus pulex, a widespread detritivore, migrates into the hyporheic zone to avoid increasing surface water temperature and intraspecific competition and (2) that these factors would reduce their survival, leaf mass consumption and energy stores. Using 36 mesocosms, three temperature (15, 20, 25°C) and species density levels (low, medium, high) were manipulated in a factorial design over 15 days. Increasing temperature to 25°C and a threefold increase in density both caused G. pulex to vertically migrate, and the interaction of these factors was additive, rather than antagonistic or synergistic. Importantly, survival, leaf consumption and glycogen content were reduced in high temperature and density treatments, suggesting tradeoffs between tolerating harsh surface conditions and limitations of inhabiting the hyporheic zone. Identifying that the hyporheic zone is used by G. pulex to avoid high water temperature and intraspecific competition is a key finding considering the global-scale increases in temperature and flow intermittence.

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“…In freshwaters studies on leaf litter breakdown have found dissimilar results when testing fungi grown under direct light incidence (BÄRLOCHER and MURDOCH, 1989 ;BURRELL and LEDGER, 2003;ALBARIÑO et al, 2008 ). Hence, our aim was to evaluate the effect of sunlight on leaf litter breakdown.…”

Section: Introductionmentioning

confidence: 99%

Natural UVR Does Not Affect Decomposition by Aquatic Hyphomycetes

Villanueva¹,

Albariño²,

Graça³

2010

International Review of Hydrobiology

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We performed field and laboratory experiments to evaluate the effect of solar radiation (UVR and PAR) on leaf litter decomposition, fungal biomass and sporulation rates, in the Andean Patagonia, where high UVR levels are common. Leaves of Alnus glutinosa exposed to three treatments, normal radiation (PAR + UVR), protected from UVR and protected from total radiation (SHADE) by plastic films lost 31-37% of their mass. Leaves of Nothofagus pumilio lost 61-64% of their mass under the same conditions. For both leaf species, differences in mass losses among treatments were not statistically significant. Sporulation rates were significantly lower in the SHADE treatment. Fungal biomass accounted for 6.2 to 7.1% of leaf mass, without significant differences among treatments.In the laboratory, leaf discs of A. glutinosa colonized by single species of aquatic hyphomycetes (Articulospora tetracladia, Flagellospora curta or Lunulospora curvula) and exposed to or protected from UVR did not differ in mass loss and sporulation rates. Pure cultures of two fungal species grew at the same rates when exposed to light (PAR and PAR + UVR) or to the SHADE. In summary, we found no evidences that current high levels of UV radiation affect litter decomposition mediated by aquatic hyphomycetes. IntroductionLeaf litter decomposition is a fundamental ecosystem process which is influenced by a complex interaction of environmental factors (i.e., current velocity, water chemistry) and intrinsic litter chemical and physical properties (e.g., lignin, nitrogen, polyphenolic content, and leaf toughness) (e.g., MALTBY, 1996 ;GULIS et al., 2006) . One of the environmental factors which has received less attention is sunlight incidence. Research on terrestrial litter decomposition has demonstrated that fungi are negatively affected by UVR (NEWSHAM et al., 1997 ;SEARLES et al., 2001 ) resulting in reduced leaf litter mass loss (PANCOTTO et al., 2003) . Enhanced UV-B radiation affect biological processes, mainly by damaging DNA (ROUS-SEAUX et al., 1999 ), further affecting growth, reproduction (BANCROFT et al., 2007 ) and also ecosystem processes like those involved in material and energy cycling (PAUL and GWYNN-JONES, 2003

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Growth of a Stream-Dwelling Caddisfly (Olinga feredayi:Conoesucidae) on Surface and Hyporheic Food Resources

Cited by 18 publications

References 55 publications

Inter‐disciplinary perspectives on processes in the hyporheic zone

Inter‐disciplinary perspectives on processes in the hyporheic zone

Gammarus pulex (Crustacea: Amphipoda) avoids increasing water temperature and intraspecific competition through vertical migration into the hyporheic zone: a mesocosm experiment

Natural UVR Does Not Affect Decomposition by Aquatic Hyphomycetes

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