Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Modify turbine placement to reduce bat fatalities We found no studies that evaluated the effects of modifying turbine placement to reduce bat fatalities. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F965https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F965Fri, 20 Dec 2013 11:22:00 +0000Collected Evidence: Collected Evidence: Retain a buffer between turbines and habitat features used by bats We found no studies that evaluated the effects of retaining a buffer between turbines and habitat features used by bats on bat populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F966https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F966Fri, 20 Dec 2013 11:23:15 +0000Collected Evidence: Collected Evidence: Deter bats from turbines using radar We found no studies that evaluated the effects of deterring bats from wind turbines using radar on bat populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F967https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F967Fri, 20 Dec 2013 11:25:11 +0000Collected Evidence: Collected Evidence: Deter bats from turbines using ultrasound Four studies evaluated the effects of deterring bats from wind turbines using ultrasound on bat populations. The four studies were in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (3 STUDIES) Survival (3 studies): Three replicated, randomized, controlled studies (one with a before-and-after trial in the second year) in the USA found mixed results. In the first year of one study, 21-51% fewer bats were killed at turbines with an ultrasonic deterrent fitted than at control turbines, but in the second year, from 2% more to 64% fewer bats were killed at turbines with ultrasonic deterrents fitted. One study found that using an ultrasonic deterrent emitting a constant or pulsed signal had mixed effects on the fatality rates of three bat species. One study found that using ultrasonic deterrents resulted in fewer fatalities for two of three bat species. BEHAVIOUR (1 STUDY) Behaviour change (1 study): One paired sites study in the USA found fewer bats flying near one of two wind turbines with an ultrasonic deterrent compared to turbines without, but the effect of the deterrent overall was not significant. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F968https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F968Fri, 20 Dec 2013 11:30:12 +0000Collected Evidence: Collected Evidence: Remove turbine lighting to reduce bat and insect attraction We found no studies that evaluated the effects of removing turbine lighting to reduce bat and insect attraction on bat populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F969https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F969Fri, 20 Dec 2013 12:15:27 +0000Collected Evidence: Collected Evidence: Prevent turbine blades from turning at low wind speeds ('feathering') Six studies evaluated the effects of preventing turbine blades from turning at low wind speeds on bat populations. Five studies were in the USA and one was in Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (6 STUDIES) Survival (6 studies): Five of six studies (including five replicated, controlled studies and one before-and-after study) in the USA and Canada found that preventing turbine blades from turning at low wind speeds (‘feathering’), or feathering along with increasing the wind speed at which turbines become operational (‘cut-in speed’) resulted in fewer bat fatalities than at conventionally operated turbines. The other study found that automatically feathering turbine blades at low wind speeds did not reduce bat fatalities. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F970https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F970Fri, 20 Dec 2013 12:19:55 +0000Collected Evidence: Collected Evidence: Automatically reduce turbine blade rotation when bat activity is high Two studies evaluated the effects of automatically reducing turbine blade rotation when bat activity is high on bat populations. One study was in Germany, and one in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Survival (2 studies): Two replicated studies (one randomized, controlled and one paired sites study) in Germany and the USA found that automatically reducing the rotation speed of wind turbine blades when bat activity is predicted to be high resulted in fewer bat fatalities for all bat species combined and for five bat species. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F971https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F971Fri, 20 Dec 2013 12:34:12 +0000Collected Evidence: Collected Evidence: Close off potential access points on turbines to prevent roosting bats We found no studies that evaluated the effects of closing off potential access points on turbines to prevent roosting bats on bat populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F972https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F972Fri, 20 Dec 2013 12:35:38 +0000Collected Evidence: Collected Evidence: Apply textured coating to turbines One study evaluated the effects of applying a textured coating to turbines on bat populations. The study was in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Abundance (1 study): One paired sites study in the USA found that applying a textured coating to a turbine did not reduce the activity of four bat species or the number of bats observed. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1957https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1957Tue, 04 Dec 2018 14:30:07 +0000Collected Evidence: Collected Evidence: Deter bats from turbines using low-level ultraviolet light We found no studies that evaluated the effects of deterring bats from turbines using low-level ultraviolet light on bat populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1958https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1958Tue, 04 Dec 2018 15:13:08 +0000Collected Evidence: Collected Evidence: Paint turbines to reduce insect attraction We found no studies that evaluated the effects of painting turbines to reduce insect attraction on bat populations. ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1959https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1959Tue, 04 Dec 2018 15:21:05 +0000Collected Evidence: Collected Evidence: Increase the wind speed at which turbines become operational (‘cut-in speed’) Twelve studies evaluated the effects of increasing the wind speed at which turbines become operational (‘cut-in speed’) on bat populations. Ten studies were in the USA and two were in Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (12 STUDIES) Survival (12 studies): Ten of 12 studies (including 10 replicated, randomized, controlled studies and one before-and-after study) in the USA and Canada found that increasing the wind speed at which turbines become operational (‘cut-in speed’), or increasing the cut-in speed along with preventing turbine blades from turning at low wind speeds (‘feathering’) resulted in fewer bat fatalities than at conventionally operated turbines. The other two studies found that increasing cut-in speeds did not reduce bat fatalities, but sample sizes were small or treatments were applied for short periods only. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1960https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1960Tue, 04 Dec 2018 15:54:57 +0000Collected Evidence: Collected Evidence: Slow rotation of turbine blades at low wind speeds One study evaluated the effects of slowing the rotation of turbine blades at low wind speeds on bat populations. The study was in Canada. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Survival (1 study): One replicated, randomized, controlled study in Canada found that bat fatalities were reduced when turbine blades were slowed at low wind speeds. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2939https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2939Fri, 12 Feb 2021 16:16:13 +0000