Collected Evidence: Collected Evidence: Cut to control bracken One randomized, controlled, before-and-after trial in Norway and one randomized, controlled study in the UK found that cutting bracken increased the cover or biomass of heather. However, two randomized, replicated, controlled studies in the UK found that cutting bracken did not increase heather cover or abundance of heather seedlings. One randomized, replicated, controlled study in the UK found that cutting to control bracken increased the species richness of heathland plant species. However, another randomized, replicated, controlled study in the UK found that cutting to control bracken did not alter species richness but did increase species diversity. One randomized, replicated, controlled study in the UK found that cutting bracken increased cover of wavy hair-grass and sheep’s fescue. One controlled study in the UK found that cutting bracken did not increase the abundance of gorse or common cow-wheat. One randomized, controlled, before-and-after trial in Norway and two randomized, controlled studies in the UK found that cutting bracken reduced bracken cover or biomass. One randomized, replicated, controlled, paired study the UK found that cutting had mixed effects on bracken cover. However, one controlled study in the UK found that cutting bracken did not decrease the abundance of bracken. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1653https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1653Sun, 22 Oct 2017 14:36:13 +0100Collected Evidence: Collected Evidence: Cut and apply herbicide to control bracken One randomized, controlled study in the UK found that cutting and applying herbicide to control bracken did not alter heather biomass. One randomized, controlled, before-and-after trial in Norway found that cutting and applying herbicide increased heather cover. One randomized, replicated, controlled, paired study in the UK found that cutting and using herbicide had no significant effect on the cover of seven plant species. One replicated, randomized, controlled study in the UK found that cutting bracken followed by applying herbicide increased plant species richness when compared with applying herbicide followed by cutting. Three randomized, controlled studies (one also a before-and-after trial, and one of which was a paired study) in the UK and Norway found that cutting and applying herbicide reduced bracken biomass or cover. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1654https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1654Sun, 22 Oct 2017 14:42:14 +0100Collected Evidence: Collected Evidence: Cut and burn bracken We found no studies that evaluated the effects of cutting and burning bracken on shrublands. '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%2F1655https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1655Sun, 22 Oct 2017 14:47:54 +0100Collected Evidence: Collected Evidence: Cut bracken and rotovate One controlled study in the UK found that cutting followed by rotovating to control bracken did not increase total plant biomass or biomass of heather. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1656https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1656Sun, 22 Oct 2017 14:50:23 +0100Collected Evidence: Collected Evidence: Use herbicide and sow seed of shrubland plants to control bracken We found no studies that evaluated the effects of controlling bracken by applying herbicide and sowing seed on shrublands. '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%2F1658https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1658Sun, 22 Oct 2017 14:56:07 +0100Collected Evidence: Collected Evidence: Increase livestock numbers to control bracken We found no studies that evaluated the effects of controlling bracken by increasing livestock numbers on shrublands. '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%2F1659https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1659Sun, 22 Oct 2017 14:57:29 +0100Collected Evidence: Collected Evidence: Use herbicide and remove leaf litter to control bracken One randomized, controlled study in the UK found that using herbicide and removing leaf litter did not increase total plant biomass after eight years. The same study found that for three of six years, heather biomass was higher in areas where herbicide was sprayed and leaf litter was removed than in areas that were sprayed with herbicide. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1660https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1660Sun, 22 Oct 2017 14:59:23 +0100Collected Evidence: Collected Evidence: Use herbicide and grazing to control bracken We found no studies that evaluated the effects of controlling bracken by using herbicide and grazing on shrublands. '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%2F1661https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1661Sun, 22 Oct 2017 15:02:06 +0100Collected Evidence: Collected Evidence: Use ‘bracken bruiser’ to control bracken One randomized, replicated, controlled, before-and-after, paired study in the UK found that bracken bruising increased bracken cover, though bracken cover also increased in areas where bracken bruising was not done.There was no effect on the number of plant species or plant diversity. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1726https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1726Wed, 22 Nov 2017 17:04:59 +0000
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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