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Roth, N.; Southerland, Mark T.; Chaillou, J.; Klauda, Ronald J.; Kazyak, P.; Stranko, Scott A.; Weisberg, Stephen B.; Hall, Lenwood W.; Morgan, Raymond P.

doi:10.1023/a:1005950228017

Cited by 47 publications

(3 citation statements)

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“…In addition to taxonomic diversity, other variables considered by indices include ‘tolerance scores’ derived from studies of organismal susceptibility to environmental degradation ( Hilsenhoff, 1987 ), and functional or trophic diversity. However, geographic region, physiography, and stream scale are also important covariates, which has led to a proliferation of variant protocols for specific applications ( e.g ., Roth et al, 1998 ; Southerland et al, 2007 ).…”

Section: Introductionmentioning

confidence: 99%

Assessing arthropod diversity metrics derived from stream environmental DNA: spatiotemporal variation and paired comparisons with manual sampling

Aunins

Mueller

Fike

et al. 2023

PeerJ

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Background Benthic invertebrate (BI) surveys have been widely used to characterize freshwater environmental quality but can be challenging to implement at desired spatial scales and frequency. Environmental DNA (eDNA) allows an alternative BI survey approach, one that can potentially be implemented more rapidly and cheaply than traditional methods. Methods We evaluated eDNA analogs of BI metrics in the Potomac River watershed of the eastern United States. We first compared arthropod diversity detected with primers targeting mitochondrial 16S (mt16S) and cytochrome c oxidase 1 (cox1 or COI) loci to that detected by manual surveys conducted in parallel. We then evaluated spatial and temporal variation in arthropod diversity metrics with repeated sampling in three focal parks. We also investigated technical factors such as filter type used to capture eDNA and PCR inhibition treatment. Results Our results indicate that genus-level assessment of eDNA compositions is achievable at both loci with modest technical noise, although database gaps remain substantial at mt16S for regional taxa. While the specific taxa identified by eDNA did not strongly overlap with paired manual surveys, some metrics derived from eDNA compositions were rank-correlated with previously derived biological indices of environmental quality. Repeated sampling revealed statistical differences between high- and low-quality sites based on taxonomic diversity, functional diversity, and tolerance scores weighted by taxon proportions in transformed counts. We conclude that eDNA compositions are efficient and informative of stream condition. Further development and validation of scoring schemes analogous to commonly used biological indices should allow increased application of the approach to management needs.

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Section: Introductionmentioning

confidence: 99%

Assessing arthropod diversity metrics derived from stream environmental DNA: spatiotemporal variation and paired comparisons with manual sampling

Aunins

Mueller

Fike

et al. 2023

PeerJ

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“…Karr [15] first devised the IBI to measure biological integrity in streams, mainly using fish as an indicator species. Moreover, the Karr index has been adopted by many management agencies and is even used to assess the integrity of estuarine ecosystems [16][17][18]. However, it is difficult to use fish as indicator species when the flow of a river is reduced or even stopped.…”

Section: Introductionmentioning

confidence: 99%

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Wang

Huang

Zhu

et al. 2022

IJERPH

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Hydropower construction and climate change have aggravated river hydrological changes, which have reduced the water flow regime in the Ruhe River Basin. The reduced flow of the river seriously affected the water supply of nearby residents and the operation of the river ecosystem. Therefore, in order to alleviate the contradiction between water use for hydropower facilities and environmental water use, the urgent need is to explore the ecological flow-threshold of rivers. This study took the Fuhe River Basin as the research object, and summarized the monitoring data of eight hydrological stations from recent decades. Based on this, we explored the response law of P−IBI and flow, a tool to quickly measure the health of the ecosystem. Through the response relationship between alterations in environmental factors of the river and phytoplankton index of biotic integrity (P−IBI), it was determined that environmental flow was the dominant influencing factor of P−IBI. According to P−IBI, the threshold of environmental discharge in the Fuhe River was limited to 273~826.8 m3/s. This study established a regulatory framework for the river flow of large rivers by constructing P−IBI and determining the critical thresholds of environmental flow by constraining the constitution. These results provide a theoretical basis for better planning and improvement of river ecosystem restoration and river utilization.

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“…Nekton populations can be described by a variety of characteristics such as species composition, trophic structure, and diversity of the assemblage, as well as the abundance and biomass of the individuals (Elliott and Dewailly 1995;Lobry et al 2003). While the IBI approach has been repeatedly modified for use in other regions and countries (Oberdorff and Hughes 1992;Roth et al 1998;Harris and Silveira 1999;Schulz et al 1999;Lyons et al 2000;Drake and Pereira 2002;Pirhalla 2004;Coates et al 2007), its application to unstable environments, namely estuarine systems, has been met with limited success (Summers et al 1995;Deegan et al 1997;Meng et al 2002;Teixeira et al 2008). This is especially true of the tidally influenced regions in coastal estuaries.…”

Section: Introductionmentioning

confidence: 99%

Relationships among nekton assemblage structure and abiotic conditions in three Texas tidal streams

Tolan

Nelson

2008

Environ Monit Assess

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The objective of this study was to assess the effects of spatially and temporally varying abiotic conditions on the nekton residing in tidally influenced streams and determine the comparability of the assemblage response across the various gears needed to fully characterize the biota. Three tidal streams were sampled seasonally for 2 years for chemical (physiochemical profiles), physical (in-stream and riparian habitat classification), and biological (nekton sampled with bag seines, trawls, and gill nets) components of ecosystem integrity. Multiple sampling stations on each stream encompassed the transitional character of the tidally influenced ecosystem, from the freshwater of the river to the saltwater of the bay. Instead of characterizing the biota with traditional fish-based indexes of biotic integrity, analysis methodologies relying heavily on multivariate ordination techniques were used. This study showed that the temporal and spatial relationships among nekton assemblages and abiotic environmental conditions were quite gear dependent. The greatest degree of difference in indicators of ecosystem health all involved upstream-downstream gradients that appear to be driven by salinity structure. Based on the results of this study, dissolved oxygen concentration does not appear to be a major structuring factor in the physical, chemical, or biological component of ecosystem integrity.

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Cited by 47 publications

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Assessing arthropod diversity metrics derived from stream environmental DNA: spatiotemporal variation and paired comparisons with manual sampling

Assessing arthropod diversity metrics derived from stream environmental DNA: spatiotemporal variation and paired comparisons with manual sampling

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Relationships among nekton assemblage structure and abiotic conditions in three Texas tidal streams

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