Do upstream migrating, juvenile amphidromous shrimps, provide a marine subsidy to river ecosystems?

Novak, Peter A.; Bayliss, Peter; Crook, David A.; García, Erica A.; Pusey, Bradley James; Douglas, Michael M.

doi:10.1111/fwb.12907

Cited by 12 publications

(8 citation statements)

References 62 publications

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“…Furthermore, studies have shown that certain species or life history stages of shrimp have microhabitat and elevational preferences partly as a function of food and habitat rather than purely reflecting predation upon them (e.g. Fossati et al., 2002; Novak et al., 2017). It would be informative to apply both day and night visual surveys perhaps in combination with backpack electrofishing of shrimps along the predator cline in streams, to disentangle the relevance of shrimp density (e.g.…”

Section: Discussionmentioning

confidence: 99%

Waterfalls mediate the longitudinal distribution of diadromous predatory fishes structuring communities in tropical, short, steep coastal streams

et al. 2021

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Tropical short, steep coastal streams are typically dominated by diadromous species, especially amphidromous fishes, crustaceans, and molluscs. We undertook a study to determine the distribution of fishes along the stream continuum and determine if substantial natural instream barriers influenced assemblage composition. We surveyed fish assemblages in three short, steep coastal streams in the Australian Wet Tropics by snorkelling and performing single pass counts in each 100‐m section along the entire main channel from the high‐tide mark to the source (or near source: until fish were no longer recorded). A primary focus was mapping the distribution and relative abundance of sicydiine gobies, and we also estimated freshwater crustacean numbers (Caridea: Palaemonidae and Atyidae). In total, 2,837 individual fish of 25 species were recorded upstream of the high‐tide mark across the three streams and the first records of an additional sicydiine goby (Smilosicyopus leprurus) were obtained from continental Australia. Consistent with findings from tropical Pacific island streams, we observed a shift in fish assemblage composition along the elevation gradient and in relation to major instream barriers (e.g. waterfalls >5 m, and high flow chutes across smooth bedrock surfaces). Species richness of diurnal predatory fishes was greatest in the lower course of streams and absent upstream of major instream barriers. Diurnal predatory fishes were, in some instances, found upstream of barriers. Specifically, large adult (>200 mm total length) Kuhlia rupestris (diurnal predators) accessed reaches above challenging sequences of cascades combined with small waterfalls. In contrast, all sizes of that species, adult Kuhlia marginata (>150 mm total length) and a diversity of other diurnal predatory fishes occupied the lower course of streams including upstream of gentle cascade sequences or isolated small waterfalls. Where abundances of diurnal predatory fishes were high, freshwater carideans were rarely observed. Peak densities of carideans were observed upstream of major barriers, with moderate densities in the upper mid‐course in the presence of few Kuhlia spp. The current study demonstrates the value of complete single‐pass surveys of fish assemblages in tropical short, steep coastal streams by revealing the highly localised occupation of particular reaches by rare fishes. It also points towards the importance of stream‐specific characteristics, namely the position of waterfalls in dictating diadromous predator distribution with consequences for community structure, thereby aligning with the Riverine Discontinuum Concept.

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Section: Discussionmentioning

confidence: 99%

Waterfalls mediate the longitudinal distribution of diadromous predatory fishes structuring communities in tropical, short, steep coastal streams

et al. 2021

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“…15,74 All principles reflected the strong relationships between Indigenous peoples, water, and non-human life in this catchment. For example, principle 5 promotes maintaining longitudinal connectivity of the river for fish and freshwater prawn migration 75,76 and for connecting Indigenous groups through complex cosmologies i.e., ''the songlines go right through, even to the (upper) catchment areas . the water follows the songlines.''…”

Section: Discussionmentioning

confidence: 99%

Conceptualizing Hydro-socio-ecological Relationships to Enable More Integrated and Inclusive Water Allocation Planning

et al. 2019

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“…Stable isotopes can also be used to help parse out the directional patterns of animal-mediated subsidies. To understand the origin of nutrients, strontium and sulphur isotopes may be used to help identify the source location of subsidies used in certain materials such as bone and cartilage (Novak et al, 2017). In certain cases, nitrogen isotopes can also be useful for identifying marine to terrestrial nutrient translocation (Hargan et al, 2017).…”

Section: Rates and Directional Patterns Of Animal Species Movement And Consequent Nutrient Transfermentioning

confidence: 99%

A methodological roadmap to quantify animal‐vectored spatial ecosystem subsidies

Ellis-Soto

Ferraro

Rizzuto

et al. 2021

Journal of Animal Ecology

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Ecosystems are open systems connected through spatial flows of energy, matter, and nutrients.Predicting and managing ecosystem interdependence requires a rigorous quantitative understanding of the drivers and vectors that connect ecosystems across spatio-temporal scales. Animals act as such vectors when they transport nutrients across landscapes in the form of excreta, egesta, and their own bodies. Here, we introduce a methodological roadmap that combines movement, foraging, and ecosystem ecology to study the effects of animal-vectored nutrient transport on meta-ecosystems. The meta-ecosystem concept -the notion that ecosystems are connected in space and time by flows of energy, matter, and organisms across boundaries -provides a theoretical framework on which to base our understanding of animalvectored nutrient transport. However, partly due to its high level of abstraction, there are few empirical tests of meta-ecosystem theory, and while we may label animals as important mediators of ecosystem services, we lack predictive inference of their relative roles and impacts on diverse ecosystems. Recently developed technologies and methods -tracking devices, mechanistic movement models, diet reconstruction techniques and remote sensing -have the potential to facilitate the quantification of animal-vectored nutrient flows and increase the predictive power of meta-ecosystem theory. Understanding the mechanisms by which animals shape ecosystem dynamics may be important for ongoing conservation, rewilding, and restoration initiatives around the world, and for more accurate models of ecosystem nutrient budgets. We provide conceptual examples that show how our proposed integration of methodologies could help investigate ecosystem impacts of animal movement. We conclude by describing practical applications to understanding cross-ecosystem contributions of animals on the move.

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Do upstream migrating, juvenile amphidromous shrimps, provide a marine subsidy to river ecosystems?

Cited by 12 publications

References 62 publications

Waterfalls mediate the longitudinal distribution of diadromous predatory fishes structuring communities in tropical, short, steep coastal streams

Waterfalls mediate the longitudinal distribution of diadromous predatory fishes structuring communities in tropical, short, steep coastal streams

Conceptualizing Hydro-socio-ecological Relationships to Enable More Integrated and Inclusive Water Allocation Planning

A methodological roadmap to quantify animal‐vectored spatial ecosystem subsidies

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