Effects of culverts on habitat connectivity in streams—A science synthesis to inform National Environmental Policy Act analyses

Scientific investigations report, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

First posted February 7, 2024 For additional information, contact: Director, Fort Collins Science CenterU.S. Geological Survey2150 Centre Ave., Bldg. CFort Collins, CO 80526-8118 The U.S. Survey is working with Federal land management agencies to develop a series of science syntheses support environmental effects analyses that conduct comply the National Environmental Policy Act (NEPA). This report synthesizes information about potential culverts on stream connectivity and subsequent fish. We conducted structured search published scientific literature find (1) culvert design, installation, degradation; (2) methods for analyzing condition quantifying connectivity; (3) changes freshwater follow organization first established in Scientific Investigations Report 2023-5114, which sections align standard elements NEPA analyses. found that, while dams biota are well documented, smaller barriers at road crossings, like culverts, prevalent collectively have substantial effect habitat connectivity. Individual differ degree they impede movement aquatic organisms, we documented assess estimate permeability culvert, or ability organisms pass through it. Finally, outlined using location quantify watershed based Dendritic Connectivity Index. Studies shown channel constriction, perched outlets, extreme flow velocities some characteristics may hinder organism passage. Culverts can serve as daily seasonal fish, disrupting access essential resources cold water overwintering refuges. Reduced population-level effects, leading lower fish species richness abundance affected watersheds. Public managers use this by incorporating it reference documentation, supplemental general

Language: Английский

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Effects of Oil Fields on Home Range, Movements, and Rates of Predation of Blunt-Nosed Leopard Lizards (Gambelia sila)

Journal of Herpetology, Journal Year: 2024, Volume and Issue: 58(2)

Published: Aug. 22, 2024

Extraction of oil and gas occurs around the world associated worksite activity can affect native species, even when some good habitat remains. Understanding possible negative effects is important for management protected species. Blunt-nosed Leopard Lizards (Gambelia sila) are a state- federally listed endangered species in San Joaquin Desert California, part their remaining range coincides with field operations. In 2015 2016, we used radiotelemetry to study home ranges movements G. sila living an limited infrastructure roads (a light-density constructed from 2011 2014) at control site about 3 km away. We did not find significant differences between either home-range size or daily distances moved. did, however, that number predation events was significantly greater site, assuming known occurrences represented all predation. Predation by birds likely facilitated predator perching locations provided power poles, transmission lines, other tall vertical structures field. No similar large predatory existed site. Only twin-pole, three-wire line adjacent prior its development. Given largely because loss, recovery may benefit minimizing these hazards fields currently support

Language: Английский

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Structured science syntheses to inform decision making on Federal public lands

Fact sheet, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

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Effects of noise from oil and gas development on raptors and songbirds—A science synthesis to inform National Environmental Policy Act analyses

Scientific investigations report, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

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