Use of Frequency and Duration Analysis for the Determination of Thermal Habitat Thresholds: Application for the Conservation of
            <i>
              <b>Alasmidonta heterodon</b>
            </i>
            in the Delaware River

Castelli, E; Parasiewicz, Piotr; Rogers, Joseph N.

doi:10.1061/(asce)ee.1943-7870.0000520

Cited by 16 publications

(36 citation statements)

References 27 publications

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“…The annual time series for the study period was then parsed into the investigated scenarios for evaluation. The continuous above threshold (CAT) time series analysis approach was used to analyse test variables for continuous events above many incrementally higher or lower thresholds (Castelli, Parasiewicz, & Rogers, ). This approach was employed together with simple descriptive statistics in relation to stream ecosystem functioning where the continuous nature of certain hydraulic conditions is critically relevant.…”

Section: Methodsmentioning

confidence: 99%

Restoring in‐stream habitat in urban catchments: Modify flow or the channel?

et al. 2018

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Urban streams have almost universally altered physical habitat conditions due to excess stormwater run‐off. This includes changes to in‐channel hydraulics and channel morphology. Restoration of in‐channel habitat has two main levers: address the hydrology or channel morphology. Both variables impact in‐stream habitat, but understanding the relative role of hydrologic and morphologic change remains a challenge. This study uses two‐dimensional hydraulic modelling to examine the relative roles of flow and channel morphology in setting hydraulic conditions. We investigated four test scenarios involving the combinations of urban versus natural hydrology and urban versus natural channel morphology. The analysis investigated three ecologically relevant hydraulics characteristics: bed mobilization, retentive habitat, and floodplain inundation, using Shields stress, shallow slow‐water habitat (SSWH) area, and floodplain inundation area hydraulic metrics, respectively. The results indicate substantial differences in hydraulic conditions between the two reaches. The urban reach showed increased bed mobility potential and SSWH availability plummeted as flow increased, whereas the natural channel showed a relatively stable bed with substantially more SSWH at most flows. Floodplain inundation frequency was low in the urban channel with decreased duration. Scenarios examined suggest that hydraulic conditions are highly sensitive to channel morphology relative to flow regime. This suggests that once channel form has been degraded, mitigating urbanization impacts on flow regime cannot maintain “natural” channel hydraulics. Management approaches therefore must protect channel morphology from change. Where the channel has already been fundamentally altered, opportunities for channel morphology rehabilitation need to be considered.

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Section: Methodsmentioning

confidence: 99%

Restoring in‐stream habitat in urban catchments: Modify flow or the channel?

et al. 2018

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“…Cole et al () described dwarf wedgemussel as thermally sensitive after observing stressed and gaping individuals under field conditions between 23 and 29°C, with co‐occurring species appearing to be unaffected. Castelli et al () found water temperatures >26.5°C at dwarf wedgemussel locations to be rare in long‐term thermal studies and the maximum water temperature over the 33‐year period was 30.8°C (although it must be noted that water release from upstream dams during the period of study was partially responsible for these temperature observations). Other studies have quantified the maximum temperature in dwarf wedgemussel populations extending from Vermont to North Carolina, with temperatures not exceeding ~25°C in northern populations and 29°C across their range (Campbell, ; Michaelson, ).…”

Section: Discussionmentioning

confidence: 99%

“…There has been recent interest in the impacts of management on instream flow and thermal habitat for key aquatic species in the Delaware River, including the dwarf wedgemussel (Bovee, Waddle, Bartholow, & Burris, ; Galbraith, Blakeslee, Cole, Talbert, & Maloney, ; Maloney et al, ). Whereas habitat information is available for many recreational fish species (reviewed in Galbraith, Blakeslee, et al, ), data on flow and thermal habitat requirements for dwarf wedgemussel are more sparse (but see Castelli, Parasiewicz, & Rogers, ; Maloney et al, ).…”

Section: Introductionmentioning

confidence: 99%

A weight‐of‐evidence approach for defining thermal sensitivity in a federally endangered species

Galbraith

Blakeslee

Spooner

et al. 2020

Aquatic Conservation

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Managing for threatened and endangered species under changing environmental conditions is a challenge faced by resource managers worldwide. Lack of basic knowledge of the biology and habitat requirements of these species can contribute to this difficulty but is exacerbated by the limitations of working with rare species (i.e. few individuals) or unrefined and non‐lethal methods for evaluating stress. A weight‐of‐evidence approach was used to evaluate the thermal biology of the federally endangered dwarf wedgemussel (Alasmidonta heterodon), using cumulative results from multiple experimental assessments, co‐occurring species, and their host fish to begin defining the thermal limits and optimal conditions for the species. Results suggest that dwarf wedgemussel and its host fish are thermally sensitive species compared with other Atlantic‐slope mussels, with a lower critical thermal maximum (CTM) and the selection of reduced temperatures during choice experiments. Physiological studies resulted in a lack of statistical significance, primarily owing to low power, which was a function of sample size – an unavoidable problem when studying rare species. Given these limitations, thermal choice and CTM may be more useful end points than physiological processes such as clearance and respiration rates when dealing with sample‐size limitations. These results suggest that management strategies that avoid exposing dwarf wedgemussel and its thermally sensitive host fish to extreme temperatures could be important for species conservation.

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“…Results suggested that existing mussel beds were located in refuge areas of lower shear stress and velocity, but ground truthing revealed that existing mussel beds only occupied a fraction of persistently available habitat predicted by the model (Maloney et al ., ). Also working with A. heterodon , Castelli, Parasiewicz & Rogers () applied a novel use of time series analysis to develop temperature ratings based on historical records and knowledge of temperature thresholds. By rating past extreme temperature events, they were able to develop flow recommendations to decrease thermal stress for A. heterodon in the Delaware River without prior knowledge of the thermal optima for the species (Castelli et al ., ).…”

Section: E‐flows Methods For Musselsmentioning

confidence: 99%

“…Also working with A. heterodon , Castelli, Parasiewicz & Rogers () applied a novel use of time series analysis to develop temperature ratings based on historical records and knowledge of temperature thresholds. By rating past extreme temperature events, they were able to develop flow recommendations to decrease thermal stress for A. heterodon in the Delaware River without prior knowledge of the thermal optima for the species (Castelli et al ., ).…”

Section: E‐flows Methods For Musselsmentioning

confidence: 99%

Developing environmental flow recommendations for freshwater mussels using the biological traits of species guilds

2015

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SUMMARY1. North American freshwater mussels (Unionidae) are a diverse and imperilled fauna that are very sensitive to flow alterations. Previous attempts to develop environmental flows for mussels have struggled to accommodate their varied habitat requirements and complex life histories. 2. We review what is known about the habitat requirements of mussels, how they can vary among species within a community, and how this variation influences the effectiveness of different environmental flow methodologies. 3. We propose a trait-based environmental flow method that addresses the needs of mussel guilds differentiated by their thermal tolerances and reproductive strategies. Used previously for fish, plants and macroinvertebrates, the guild approach groups species by traits and identifies flow requirements of guilds as opposed to entire communities. 4. We apply the guild approach to the mussel fauna of the Kiamichi and Little Rivers in southeastern Oklahoma, U.S.A., and illustrate how changes in the hydrograph can be made to better meet the seasonal flow needs of differing mussel guilds and their host fish. 5. The guild environmental flow method can provide flow recommendations that cater to the life history and habitat requirements represented within diverse mussel communities. In addition, the method can be adapted among regions where trait data are available or combined with rating models that estimate trait data for understudied species.

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Use of Frequency and Duration Analysis for the Determination of Thermal Habitat Thresholds: Application for the Conservation of Alasmidonta heterodon in the Delaware River

Cited by 16 publications

References 27 publications

Restoring in‐stream habitat in urban catchments: Modify flow or the channel?

Restoring in‐stream habitat in urban catchments: Modify flow or the channel?

A weight‐of‐evidence approach for defining thermal sensitivity in a federally endangered species

Developing environmental flow recommendations for freshwater mussels using the biological traits of species guilds

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