Heat and hypoxia give a global invader, Gambusia holbrooki, the edge over a threatened endemic fish on Australian floodplains

Stoffels, Rick J.; Weatherman, Kyle; Allen‐Ankins, Slade

doi:10.1007/s10530-017-1457-6

Cited by 12 publications

(7 citation statements)

References 60 publications

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“…Variation in geomorphology, topography, solar radiation, streambed composition, groundwater exchange, and hydraulics, among other factors, causes spatial heterogeneity in temperature along both the lateral and longitudinal dimensions of the riverscape. Laterally, thermal regimes of habitats vary among the lotic (flowing channels) and lentic (e.g., oxbow lakes) habitats of the riverscape (Tonolla et al 2010); among lentic water bodies on a floodplain (Tonolla et al 2010;Stoffels et al 2017); and among habitats within the channel itself, even on a scale of metres (Wawrzyniak et al 2013;Dugdale et al 2015;Baldock et al 2016). Longitudinally, strong thermal gradients occur on a scale of kilometres within rivers (Caissie 2006;Fullerton et al 2015;Stoffels et al 2016;Allen-Ankins and Stoffels 2017).…”

Section: Temperaturementioning

confidence: 99%

Riverscape recruitment: a conceptual synthesis of drivers of fish recruitment in rivers

Humphries

King

McCasker

et al. 2020

Can. J. Fish. Aquat. Sci.

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Most fish recruitment models consider only one or a few drivers in isolation, rarely include species’ traits, and have limited relevance to riverine environments. Despite their diversity, riverine fishes share sufficient characteristics that prediction of recruitment should be possible. Here we synthesize the essential components of fish recruitment hypotheses and the key features of rivers to develop a model that predicts relative recruitment strength, for all fishes, in rivers under all flow conditions. The model proposes that interactions between flow and physical complexity will create locations in rivers, at mesoscales, where energy and nutrients are enriched. The resultant production of small prey will be concentrated and prey and fish larvae located (through dispersal or retention) so that the larvae can feed, grow, and recruit. Our synthesis explains how flow and physical complexity affect fish recruitment and provides a conceptual basis to better conserve and manage riverine fishes globally.

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Section: Temperaturementioning

confidence: 99%

Riverscape recruitment: a conceptual synthesis of drivers of fish recruitment in rivers

Humphries

King

McCasker

et al. 2020

Can. J. Fish. Aquat. Sci.

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“…This diversity difference disappeared when mosquitofish were excluded from the analysis. It is well known that mosquitofish can handle low-O 2 conditions (Stoffels et al 2017), in part due to their ability to gulp air from the air/water interface. No other obvious seasonal differences existed for the fish community metrics.…”

Section: Resultsmentioning

confidence: 99%

Monitoring fish, benthic invertebrates, and physicochemical properties of surface water for evaluating nonpoint source pollution control in coastal agricultural watersheds

Poudel¹,

Cazan²,

Oguma³

et al. 2020

Journal of Soil and Water Conservation

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Many agricultural watersheds in the United States have impaired waterbodies due to nonpoint source pollution from agricultural activities and related processes. To understand the physical, chemical, and biological integrity of surface water in a coastal agricultural watershed, spatial and seasonal patterns of physicochemical and biological properties were investigated in Bayou Lacassine watershed (BLW) in Louisiana, United States. The relationship between the physicochemical and biological properties were also investigated. Sampling sites were located in the Bayou Chene and Lacassine Bayou subwatersheds within the BLW. Dissolved oxygen (DO), turbidity, conductivity, temperature, pH, total suspended solids (TSS), total dissolved solids (TDS), total solids (TS), five-day biological oxygen demand (BOD 5 ), nitrate and nitrite-nitrogen (NO 3 /NO 2 -N), total Kjeldahl nitrogen (TKN), soluble reactive phosphorus (SRP), total phosphorus (TP), chloride (Cl -), fluoride (F -), and sulfate (SO 4 ) were determined weekly from samples collected during 2012 to 2015. Fish and benthic invertebrate diversity and abundance in the two subwatersheds were determined in early summer and in fall of 2012 and 2013 at nine sites. Water quality was generally better at the most downstream site than at the most upstream site where agricultural intensity was highest, with significant differences in turbidity, TSS, TDS, TS, NO 3 /NO 2 -N, TKN, TP, and BOD 5 . There was also seasonal variation for the water quality parameters due to variability in agricultural activities and climatic conditions within the watershed. Results of the relationship between physicochemical properties and fish community variables showed that species richness, diversity, and abundance were negatively affected by elevated TS, NO 3 /NO 2 -N, and conductivity. For the benthic invertebrates, diversity was negatively related to BOD 5 . This study demonstrated unexpected longitudinal and seasonal patterns in physicochemical and biological properties of surface waters in a coastal agricultural watershed. This information is valuable in developing nonpoint source pollution control strategies for these subwatersheds.

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“…When compared to the main channel, warmer habitat temperatures on floodplains may enhance growth and hence affect survival and recruitment of some species (Gutreuter et al, 1999;Schramm & Eggleton, 2006;Sommer et al, 2001). During drier, non-flood periods, harsh physical conditions on floodplains can interact with behavioural and physiological traits to reduce the survival rates of some species over others (McNeil & Closs, 2007;Stoffels et al, 2017). Floodplain habitats may support foods that are more abundant (Benke, 2001;McInerney et al, 2017) and of a higher nutritional quality (McInerney et al, 2020) than channel habitats.…”

Section: Effects Of Floodplain Habitatmentioning

confidence: 99%

Fragmentation of lateral connectivity and fish population dynamics in large rivers

et al. 2022

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Lateral Hydrological Connectivity (LHC) has been extensively fragmented in river–floodplain ecosystems of the world. Uncertainties about how LHC affects fishes are great, impeding the design of effective rehabilitation strategies. Existing conceptual frameworks do not provide sufficient mechanistic detail to support the novel decision problems river managers face. We offer a framework of how LHC affects fishes in river–floodplain ecosystems that is, process‐based, integrates all life‐stages and is spatial; these features, we argue, are required to assess risks and opportunities associated with different LHC rehabilitation strategies. Within river–floodplain segments, LHC affects population processes through five ‘effect‐classes’: effects of floodplain habitat (1) and channel habitat (2); effects of material subsidies from the floodplain to the channel (3) and vice versa (4); and effects of connectivity on lateral dispersal (5). The relative influence of these effect‐classes on processes varies among species and life‐stages. At the scale of the drainage basin, inter‐segment variation in geomorphology generates a longitudinal source‐sink structure to habitat quality and quantity, pointing to a need to better understand fish metapopulation dynamics in river–floodplain ecosystems. Given the significant investment in trying to restore river–floodplain ecosystems, we highlight potentially costly and ineffective LHC management decisions. These include certain heavily engineered LHC rehabilitation strategies that do not promote critical population processes at a local scale, and at basin scales implementing strategies that do not facilitate the metapopulation processes that promote species’ persistence.

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Heat and hypoxia give a global invader, Gambusia holbrooki, the edge over a threatened endemic fish on Australian floodplains

Cited by 12 publications

References 60 publications

Riverscape recruitment: a conceptual synthesis of drivers of fish recruitment in rivers

Riverscape recruitment: a conceptual synthesis of drivers of fish recruitment in rivers

Monitoring fish, benthic invertebrates, and physicochemical properties of surface water for evaluating nonpoint source pollution control in coastal agricultural watersheds

Fragmentation of lateral connectivity and fish population dynamics in large rivers

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