Biological assessment of western <scp>USA</scp> sandy bottom rivers based on modeling historical and current fish and macroinvertebrate data

Hughes, Robert M.; Zeigler, Meredith; Stringer, Shann; Linam, Gordon W.; Flotemersch, Joseph E.; Jessup, Benjamin K.; Joseph, Seva; Jacobi, Gerald Z.; Guevara, Lynette S.; Cook, Robert Lewis; Bradley, Patricia; Barrios, Kristopher

doi:10.1002/rra.3929

Cited by 5 publications

(3 citation statements)

References 69 publications

(118 reference statements)

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“…Before-after control-impact studies on fish assemblage response to habitat restoration or catastrophic events (e.g., Reale et al, 2021 ; Santos et al, 2022 ) assume sampling efforts sufficient to represent the fish assemblage at a given location and time, allowing observation of real changes in the assemblage. Retrospective analyses from museum collections such as Hughes et al ( 2022 ) should be cautious when sampling effort was not recorded.…”

Section: Resultsmentioning

confidence: 99%

Effects of seining effort on estimates of fish diversity in a sand-bed river

Archdeacon

Gonzales

Reale

et al. 2023

Environ Monit Assess

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Changes in species diversity can be an indicator of ecosystem disturbance, impairment, or recovery. Estimating sampling effort needed to adequately represent stream fish assemblages is necessary for informing conservation actions. Increased sampling intensity can increase species detection, affecting the accuracy and precision of biodiversity indices. Seining is commonly used in fish surveys in sand-bottomed streams of the western USA. Here, we sampled 20, 200-m long stream sites each with 40 consecutive seine hauls to determine how increased within-site effort affected measures of species diversity. An average of 10 seine hauls were required to collect 75% of species present at sites in 40 seine hauls, while 18 seine hauls were required to collect 100% of species observed at a site sampled with 40 hauls. Simpson’s diversity index was highly variable when fewer than 7 seine hauls were performed at each site but stabilized when effort was > 15 seine hauls per site. Total dissimilarity and β-diversity components were variable under low sampling effort and also stabilized when effort reached 15 seine hauls per site. However, sampling with more than 18–20 seine hauls per site yielded few additional species. In shallow, sand-bed streams, we suggest sampling with < 5 seine hauls per 200 m of stream can result in unreliable estimates of α-diversity and variation in β-diversity. Increased effort of 15–20 seine hauls per 200 m of stream captured nearly all species present in 40 hauls per 200 m and stabilized species evenness and β-diversity indices.

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Section: Resultsmentioning

confidence: 99%

Effects of seining effort on estimates of fish diversity in a sand-bed river

Archdeacon

Gonzales

Reale

et al. 2023

Environ Monit Assess

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“…Community changes associated with changes in certain sentinel assemblages can serve as powerful biological indicators of aquatic ecosystem health or ecological integrity (Karr et al, 1986). Examples include the fish‐based Index of Biotic Integrity, the O/E Index (i.e., observed vs. expected community composition and diversity), and the Biological Condition Gradient approach (Davies, 2000; Hughes et al, 2021). New indicators have been proposed for intermittent rivers and ephemeral streams (Pastor et al, 2022).…”

Section: Future‐proofing With Freshwater Biodiversitymentioning

confidence: 99%

People need freshwater biodiversity

et al. 2023

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Freshwater biodiversity, from fish to frogs and microbes to macrophytes, provides a vast array of services to people. Mounting concerns focus on the accelerating pace of biodiversity loss and declining ecological function within freshwater ecosystems that continue to threaten these natural benefits. Here, we catalog nine fundamental ecosystem services that the biotic components of indigenous freshwater biodiversity provide to people, organized into three categories: material (food; health and genetic resources; material goods), nonmaterial (culture; education and science; recreation), and regulating (catchment integrity; climate regulation; water purification and nutrient cycling). If freshwater biodiversity is protected, conserved, and restored in an integrated manner, as well as more broadly appreciated by humanity, it will continue to contribute to human well-being and our sustainable future via this wide range of services and associated nature-based solutions to our sustainable future.

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“…Among the aquatic biota, macroinvertebrates and fish are generally highly sensitive organisms and their dynamics can seriously be affected by changes in water quality [15,16]. Due to anthropogenic activities, fish and macroinvertebrate communities are threatened, leading to an unbalanced food-web structure in freshwater ecosystems [17,18].…”

Section: Introductionmentioning

confidence: 99%

Water and Sediment Chemistry as Drivers of Macroinvertebrates and Fish Assemblages in Littoral Zones of Subtropical Reservoirs

Munyai,

Liphadzi,

Mutshekwa

et al. 2023

Water

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Reservoirs are human-made ecosystems with diverse purposes that benefit humans both directly and indirectly. They however cause changes in geomorphological processes such as sediment cycling and influence the composition and structure of aquatic biota. This study aimed to identify water and sediment quality parameters as drivers of macroinvertebrates and fish communities during the cool-dry and hot-wet seasons in the littoral zones of three subtropical reservoirs (Albasini, Thathe and Nandoni). Macroinvertebrates and fish were collected from three sites (n = 3 from each site) in each reservoir. A total of 501 and 359 macroinvertebrates and fish individuals were collected throughout the sampling period, respectively. The present study employed a two-way ANOVA in conjunction with redundancy analysis (RDA) to assess the relationships that exist between water and sediment variables, macroinvertebrates diversity and species abundances across seasons. Based on the two-way ANOVA model, significant differences were observed across reservoirs for evenness, Simpson’s diversity, and total abundance, while seasonal differences were observed for most metrics, with exception for evenness. The RDA results identified four water variables (i.e., water temperature, oxidation–reduction potential, pH and conductivity) and one sediment metal (Mg) as the most important parameters in driving the fish community structure. Field observations and metal results attest that the Nandoni reservoir shows high concentrations of metals in sediments as compared to other reservoirs, suggesting that anthropogenic activities such as car washing, brick making, recreation, fishing, wastewater treatment work and landfill site may be the major contributor of metals to the Nandoni reservoir, which accumulate in the littoral zones. Findings of this study highlight the need to analyze reservoir ecological conditions at several scales. The study of macroinvertebrates and fish, water, and sediment chemistry in the littoral zone laid the groundwork for proposing measures for conserving aquatic ecosystems.

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Biological assessment of western USA sandy bottom rivers based on modeling historical and current fish and macroinvertebrate data

Cited by 5 publications

References 69 publications

Effects of seining effort on estimates of fish diversity in a sand-bed river

Effects of seining effort on estimates of fish diversity in a sand-bed river

People need freshwater biodiversity

Water and Sediment Chemistry as Drivers of Macroinvertebrates and Fish Assemblages in Littoral Zones of Subtropical Reservoirs

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