Resource Documents: Canada (32 items)
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Author: Palmer, William
Numerous papers, including some by this author, have identified what are dismissed with disdain as “anecdotal reports” of adverse impacts that occurred with the start up of wind turbines in the environment of those impacted. However, there is a solid basis for presenting such lists. It mirrors the approach taken by most medical doctors when a patient first presents himself or herself with a new adverse health complaint. Taking a patient “history” is the way most doctors begin. Similarly, engineers and problem solvers often begin to address a new problem by looking for changes that have occurred. Yet, some maintain there is no proof that the start up of the turbines was the change that caused the impact, even though the conditions diminish when the person vacates the area, and recur when the person returns. They may attribute it to the stress self-generated by refusing to accept a change. Ignoring those suffering will not result in solving the problem predicted by Kryter of people making real-life behavioral changes. The rigorous method established in this paper permits measuring the physical emissions (noise) from wind turbines, and confirming some aspects of the quality of the noise that are identified as problematic to demonstrate evidence of the cause for the suffering.
William K. G. Palmer, P.Eng., TRI-LEA-EM
7th International Conference on Wind Turbine Noise – Rotterdam – 2nd to 5th May 2017
Download original document: “A Rigorous Method of Addressing Wind Turbine Noise”
Author: Zimmerling, Ryan; and Francis, Charles
ABSTRACT: Wind turbines have been hypothesized to affect bat populations; however, no comprehensive analysis of bat mortality from the operation of wind turbines in Canada has been conducted. We used data from carcass searches for 64 wind farms, incorporating correction factors for scavenger removal, searcher efficiency, and carcasses that fell beyond the area searched to estimate bat collision mortality associated with wind turbines in Canada. On average, 15.5 ± 3.8 (95% CI) bats were killed per turbine per year at these sites (range = 0–103 bats/turbine/yr at individual wind farms). Based on 4,019 installed turbines (the no. installed in Canada by Dec 2013), an estimated 47,400 bats (95% CI = 32,100–62,700) are killed by wind turbines each year in Canada. Installed wind capacity is growing rapidly in Canada, and is predicted to increase approximately 3.5-fold over the next 15 years, which could lead to direct mortality of approximately 166,000 bats/year. Long-distance migratory bat species (e.g., hoary bat [Lasiurus cinereus], silver-haired bat [Lasionycteris noctivagans], eastern red bat [Lasiurus borealis]) accounted for 73% of all mortalities. These species are subject to additional mortality risks when they migrate into the United States. The little brown myotis (Myotis lucifugus), which was listed as Endangered in 2014 under the Species At Risk Act (SARA), accounted for 13% of all mortalities from wind turbines, with most of the mortality (87%) occurring in Ontario. Population-level impacts may become an issue for some bat species as numbers of turbines increase.
J. RYAN ZIMMERLING, Environment and Climate Change Canada, Canadian Wildlife Service, Gatineau, QC, Canada
CHARLES M. FRANCIS, Environment and Climate Change Canada, Canadian Wildlife Service, Ottawa, ON, Canada
The Journal of Wildlife Management; DOI: 10.1002/jwmg.21128
Volume 80, Issue 8, November 2016, Pages 1360–1369
Download original document: “Bat Mortality Due to Wind Turbines in Canada”
Origins and migratory patterns of bats killed by wind turbines in southern Alberta: evidence from stable isotopes
Author: Baerwald, Erin; Patterson, Bill; and Barclay, Robert
Abstract. Large numbers of migratory bats are killed every autumn at wind energy facilities in North America. While this may be troubling from a population perspective, these fatalities provide an opportunity to learn more about bat migration and the origins and summer distributions of migratory bats by using endogenous markers. Such markers include stable isotope values, which have been used to answer questions about ecological systems, such as trophic levels and food webs, and the origins and migratory routes of animals. To estimate the origins of migratory bats, we determined nitrogen (δ¹⁵N), carbon (δ¹³C), and hydrogen (δ²H) stable isotope values of fur (δ¹⁵Nf, δ¹³Cf, δ²Hf, respectively) from hoary bats (Lasiurus cinereus) and silver-haired bats (Lasionycteris noctivagans) killed at a wind energy facility in southern Alberta, Canada. We determined that mean isotope values varied among species, year, sex, and age class. δ¹³Cf and δ²Hf values indicated that silver-haired bats likely originated in the boreal forest, farther north and/or at higher elevations than the aspen parkland-like habitat suggested by the isotope values of hoary bats. IsoMAP analysis indicated that bat fatalities may have originated from a large catchment area potentially hundreds of kilometers away. Our data provide further evidence for a migration route along the eastern slopes of the Rocky Mountains that is used by bats from across Alberta and beyond, and suggest that fatalities at a single wind energy site have the potential to have far-reaching ecological and population consequences.
E. F. BAERWALD, W. P. PATTERSON, and R. M. R. BARCLAY
Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada; and Saskatchewan Isotope Laboratory, Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
Ecosphere 5(9):118. http://dx.doi.org/10.1890/ES13-00380.1
Download original document: “Origins and migratory patterns of bats killed by wind turbines in southern Alberta: evidence from stable isotopes”
Author: Frick, Winifred; Baerwald, Erin; Pollock, Jacob; Barclay, Robert; Szymanski, Jennifer; et al.
Abstract: Large numbers of migratory bats are killed every year at wind energy facilities. However, population-level impacts are unknown as we lack basic demographic information about these species. We investigated whether fatalities at wind turbines could impact population viability of migratory bats, focusing on the hoary bat (Lasiurus cinereus), the species most frequently killed by turbines in North America. Using expert elicitation and population projection models, we show that mortality from wind turbines may drastically reduce population size and increase the risk of extinction. For example, the hoary bat population could decline by as much as 90% in the next 50 years if the initial population size is near 2.5 million bats and annual population growth rate is similar to rates estimated for other bat species (λ = 1.01). Our results suggest that wind energy development may pose a substantial threat to migratory bats in North America. If viable populations are to be sustained, conservation measures to reduce mortality from turbine collisions likely need to be initiated soon. Our findings inform policy decisions regarding preventing or mitigating impacts of energy infrastructure development on wildlife.
W.F. Frick, E.F. Baerwald, J.F. Pollock, R.M.R. Barclay, J.A. Szymanski, T.J. Weller, A.L. Russell, S.C. Loeb, R.A. Medellin, L.P. McGuire
- Bat Conservation International, PO Box 162603, Austin, Texas (W.F.F.)
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, Cal. (W.F.F., J.F.P.)
- Department of Biological Sciences, University of Calgary, Calgary, Alberta (E.F.B.)
- American Wind Wildlife Institute, Washington, DC (E.F.B., R.M.R.B.)
- United States Fish and Wildlife Service, Endangered Species Program, U.S. Fish and Wildlife Resource Center, Onalaska, Wis. (J.A.S.)
- United States Department of Agriculture Forest Service, Pacific Southwest Research Station, Arcata, Cal. (T.J.W.)
- Department of Biology, Grand Valley State University, Allendale, Mich. (A.L.R.)
- United States Department of Agriculture Forest Service, Southern Research Station, Clemson, S.Car. (S.C.L.)
- Instituto de Ecología, Universidad Nacional Autónoma de México, Distrito Federal, Mexico (R.A.M.)
- Department of Biological Sciences, Texas Tech University, Lubbock, Texas (L.P.M.)
Biological Conservation, Volume 209, May 2017, Pages 172–177
Download original document: “Fatalities at wind turbines may threaten population viability of a migratory bat”