Unique habitat and macroinvertebrate assemblage structures in spring-fed stream: a comparison among clastic lowland tributaries and mainstreams in northern Japan

Sakai, Masaru; Iwabuchi, Katsuya; Bauman, David

doi:10.1007/s42974-021-00048-5

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…The environmental heterogeneity created by groundwater discharge is related to various scientific themes. It creates a suitable thermal habitat for aquatic organisms by modulating the temperatures of the stream and streambed (Briggs et al., 2013; Chu et al., 2008; Dugdale et al., 2013; Wilbur et al., 2020) and helps increase biodiversity by creating unique environmental conditions (Meyer et al., 2007; Sakai et al., 2021). For humans, some villages utilize the discharge from groundwater springs as a water supply in not only dry regions (Nhu et al., 2020) but also humid regions (Ushijima et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

Real‐Time Monitoring and Postprocessing of Thermal Infrared Video Images for Sampling and Mapping Groundwater Discharge

Iwasaki

Fukushima

Nagasaka

et al. 2023

Water Resources Research

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Groundwater discharge along channels can affect stream discharge, chemistry, and ecological communities. Although the spatial distribution of groundwater springs along wide rivers can be investigated by areal thermal infrared (TIR) remote sensing, this technique is difficult to apply to mapping at a high spatial resolution and under riparian tree canopies. We present a real‐time monitoring and postprocessing method of ground‐based TIR video for determining groundwater discharge sampling points and mapping the surface water temperature. We applied this method to mapping two headwater streams in Hokkaido, Japan, in the summer. The first site was a 1.3‐km‐long reach underlain by Pleistocene andesite lava. Almost all of the springs were colder and had a different chemistry compared to that of the stream water, which supports the usefulness of TIR monitoring for determining groundwater discharge zones. Video postprocessing showed that cold groundwater springs were spaced every ∼100 m, and their distribution did not follow the topography. At the second site, cold and warm springs were underlain by Holocene volcanic ash. The cold springs mainly seeped from hyporheic and riparian zones downstream, while warm springs were at the footslope. Some cold springs had much higher solute concentrations than the stream and warm springs, which suggests that the water temperature is useful for inferring sources of groundwater discharge. At this site, the video postprocessing could map not only the locations of the cold springs but also the spatial heterogeneity of the stream temperature associated with groundwater inputs.

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Section: Introductionmentioning

confidence: 99%

Real‐Time Monitoring and Postprocessing of Thermal Infrared Video Images for Sampling and Mapping Groundwater Discharge

Iwasaki

Fukushima

Nagasaka

et al. 2023

Water Resources Research

Self Cite

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“…Groundwater springs help increase biodiversity by creating unique environmental conditions (Meyer et al, 2007;Sakai et al, 2021). For humans, some villages utilize the discharge from groundwater springs as a water supply in not only dry regions (Nhu et al, 2020) but also humid regions (Ushijima et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Thermal video recording while walking: A simple method for mapping groundwater discharge points along forested headwater streams

Iwasaki

Fukushima

Nagasaka

et al. 2022

Preprint

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Groundwater discharge along channels can affect stream runoff, chemistry, and ecological communities. Although the spatial distribution of groundwater springs can be investigated by areal thermal remote sensing of wide rivers, this technique is difficult to apply to forested headwater streams because their channels are often covered by riparian trees. We present a method of mapping groundwater springs for forested headwater streams based on recording thermal video while walking along channels. We applied this method at two sites in Hokkaido, Japan. At one site, groundwater springs were spaced every ˜100 m, and their distribution did not follow the topography at a 1.3-km-long reach underlain by Pleistocene andesite lava. Here, almost all of the springs were colder than stream water and had similar chemistries to each other. At the second site, cold and warm springs were underlain by Holocene volcanic ash. The cold springs mainly seeped from the streambed at the downstream part of the site while warm springs were located at the footslope. Some cold springs had much higher solute concentrations than the stream and warm springs, which suggests that the groundwater discharge to the stream had multiple sources. We also used our method to map the spatial heterogeneity of the stream temperature associated with groundwater inputs. This method is suitable for wide-area surveys because it can easily map the spatial distribution of the surface water temperature and the groundwater discharge along headwater streams.

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Flood-induced interspecific interactions in spring-fed tributary as an ecosystem function of heterogeneous river networks

2021

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Understanding the migratory community dynamics of river networks is important for maintaining lotic system integrity. River animals migrate to their preferred habitats in spatiotemporally heterogeneous river environments. Spring-fed habitats are uniquely characterized by stable temperature and flow regimes, which create suitable spawning habitats for the chum salmon Oncorhynchus keta. O. keta exhibits "run up" to its birthplace for spawning, especially during floods. Because the eggs deposited by this anadromous fish are nutritious and actively consumed by freshwater animals, the location and timing of O. keta spawning events affect the spatiotemporal accumulation of mobile consumers. In this study, we examined changes in temporal population density in spawning O. keta and a mobile consumer (juvenile O. masou masou) in a lowland, spring-fed tributary in northern Japan during a 48.5-mm autumn rainfall event.In both species, population density increased, and then decreased, after the rainfall event.In O. keta, these changes were closely associated with rainfall intensity, whereas in O. masou masou the peak was delayed until 3 days after the rainfall event. A comparison of the gut contents of O. masou masou sampled from a spring-fed tributary and an adjacent non-spring-fed tributary indicated greater consumption of O. keta eggs in the spring-fed tributary. These results suggested that preferential migration of O. keta into spring-fed tributaries for spawning induces subsequent accumulation of juvenile O. masou masou, in turn increasing O. keta egg consumption. These findings improve our understanding of community dynamics during floods in a heterogeneous river network environment.

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Unique habitat and macroinvertebrate assemblage structures in spring-fed stream: a comparison among clastic lowland tributaries and mainstreams in northern Japan

Cited by 6 publications

References 45 publications

Real‐Time Monitoring and Postprocessing of Thermal Infrared Video Images for Sampling and Mapping Groundwater Discharge

Real‐Time Monitoring and Postprocessing of Thermal Infrared Video Images for Sampling and Mapping Groundwater Discharge

Thermal video recording while walking: A simple method for mapping groundwater discharge points along forested headwater streams

Flood-induced interspecific interactions in spring-fed tributary as an ecosystem function of heterogeneous river networks

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