Larval Habitat and Reintroduction Site Selection for Cicindela Puritana in Connecticut

Omland, Kristian Shawn

doi:10.1656/1092-6194(2002)009[0433:lharss]2.0.co;2

Cited by 13 publications

(3 citation statements)

References 7 publications

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“…Two species of rare tiger beetles, puritan tiger beetle ( Cicindela puritana ) and cobblestone tiger beetle ( Cicindela marginipennis ), are found in these shoreline habitats along the Connecticut River and some tributaries. Increased short‐term flow fluctuations downstream of hydropower dams in the Connecticut River basin have contributed to the loss of stable cobble and sand beaches, habitat for larvae and foraging adult tiger beetles (US Fish and Wildlife Service, 1993; Leonard and Bell, 1999; Omland, 2002; New Hampshire Fish and Game Department, 2005). Rivers with extreme ranges of subdaily flow fluctuations may be fishless and have low‐diversity macroinvertebrate assemblages that are dominated by taxa resilient to disturbance, as seen in many glacial‐fed streams (Ward, 1994; Brown et al ., 2006).…”

Section: Introductionmentioning

confidence: 99%

Determining the effects of dams on subdaily variation in river flows at a whole‐basin scale

Zimmerman

Letcher

Nislow

et al. 2010

River Research & Apps

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River regulation can alter the frequency and magnitude of subdaily flow variations causing major impacts on ecological structure and function. We developed an approach to quantify subdaily flow variation for multiple sites across a large watershed to assess the potential impacts of different dam operations (flood control, run-of-river hydropower and peaking hydropower) on natural communities. We used hourly flow data over a 9-year period from 30 stream gages throughout the Connecticut River basin to calculate four metrics of subdaily flow variation and to compare sites downstream of dams with unregulated sites. Our objectives were to (1) determine the temporal scale of data needed to characterize subdaily variability; (2) compare the frequency of days with high subdaily flow variation downstream of dams and unregulated sites; (3) analyse the magnitude of subdaily variation at all sites and (4) identify individual sites that had subdaily variation significantly higher than unregulated locations. We found that estimates of flow variability based on daily mean flow data were not sufficient to characterize subdaily flow patterns. Alteration of subdaily flows was evident in the number of days natural ranges of variability were exceeded, rather than in the magnitude of subdaily variation, suggesting that all rivers may exhibit highly variable subdaily flows, but altered rivers exhibit this variability more frequently. Peaking hydropower facilities had the most highly altered subdaily flows; however, we observed significantly altered ranges of subdaily variability downstream of some flood-control and run-of-river hydropower dams. Our analysis can be used to identify situations where dam operating procedures could be modified to reduce the level of hydrologic alteration.

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Section: Introductionmentioning

confidence: 99%

Determining the effects of dams on subdaily variation in river flows at a whole‐basin scale

Zimmerman

Letcher

Nislow

et al. 2010

River Research & Apps

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“…Abbotts Lagoon, where both species occur in fairly equal abundances, with medium‐coarse sand is the anomaly, suggesting that other habitat criteria, such as the consistently moist sand around the Lagoon, are important for C. hirticollis . A study along the Connecticut River found that the rare tiger beetle C. purtiana preferred fine‐medium sands and that sand texture (grain size) was most important in determining larval habitat (Omland, 2002). In addition, surface‐sand texture was more important than that 30 cm below.…”

Section: Discussionmentioning

confidence: 99%

“…Wire frames simulate shade from sparse beach vegetation. Larval burrows were often found near sparse, low‐lying vegetation, but never under the dominant and invasive European Dune Grass Ammophila arenaria (Omland, 2002; Brust et al , 2006; T. M. Cornelisse, pers. obs.).…”

Section: Discussionmentioning

confidence: 99%

Effects of soil characteristics and human disturbance on tiger beetle oviposition

Cornelisse

Hafernik

2009

Ecological Entomology

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1. Understanding species-specific habitat requirements is important in insect ecology. Co-occurrence of closely related species can provide insight into microhabitat segregation. Tiger beetles are well suited for such studies, as they occur in multi-species assemblages, exhibit species-specific habitat requirements, and are sensitive to anthropogenic modifications of the environment.2. This study investigated ovipositional microhabitat choice of two sympatric tiger beetles at Point Reyes National Seashore, California, U.S.A., and evaluates how human activity affects that choice. Cicindela oregona is widespread and common whereas C. hirticollis , an undescribed subspecies, is locally threatened. Laboratory experiments tested oviposition-site selection of the two species in response to variations in moisture, pH, salinity, and grain size. Field experiments tested larval burrow location in response to experimental shading and experimental human disturbance.3. Laboratory results indicated that while C. hirticollis females preferred a narrow range of moisture levels and fine sands, C. oregona females had more specific pH and salinity requirements and preferred coarser sands. They also differed in timing of activity. Preferences are probably related to prevention of fungal or bacterial infection and avoidance of desiccation and immersion.4. In the field, significantly more larval burrows were found under experimental shading for both species. In addition, repeated human compaction of the sand significantly decreased the number of larval burrows.5. Results suggest that protection of microhabitat, restoration of native plants, and limitation of human traffic are vital in the conservation management of tiger beetles.

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Status of Critical Habitats and Invasive Species

Palinkas

Mistri

Staver

et al. 2020

Coastal Ecosystems in Transition

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Larval Habitat and Reintroduction Site Selection for Cicindela Puritana in Connecticut

Cited by 13 publications

References 7 publications

Determining the effects of dams on subdaily variation in river flows at a whole‐basin scale

Determining the effects of dams on subdaily variation in river flows at a whole‐basin scale

Effects of soil characteristics and human disturbance on tiger beetle oviposition

Status of Critical Habitats and Invasive Species

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