Collected Evidence: Collected Evidence: Add fertilizer to soil (alongside planting/seeding) A replicated, controlled study in Iceland found that adding fertilizer and sowing seeds increased cover of shrubs and trees in a majority of cases. The same study showed an increase in vegetation cover in two of three cases. One controlled study in the USA found that adding fertilizer increased the biomass of four-wing saltbush in a majority of cases. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1704https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1704Mon, 23 Oct 2017 11:35:39 +0100Collected Evidence: Collected Evidence: Add peat to soil (alongside planting/seeding) One replicated, randomized, controlled study in the UK found that adding peat to soil and sowing seed increased the cover of common heather in the majority of cases, compared to seeding alone. One replicated, randomized, controlled study in the UK found that adding peat to soil and sowing seed increased the density of heather seedlings, and led to larger heather plants than seeding alone, but that no seedlings survived after two years. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1705https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1705Mon, 23 Oct 2017 11:54:26 +0100Collected Evidence: Collected Evidence: Add mulch to soil (alongside planting/seeding) A replicated, randomized, controlled study in the USA found that using mulch did not increase the number of shrubs, or the height of California sagebrush. A randomized, controlled study in South Africa found that applying mulch and sowing seeds increased the number of seedlings, but not their survival. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1706https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1706Mon, 23 Oct 2017 11:59:05 +0100Collected Evidence: Collected Evidence: Add mulch and fertilizer to soil (alongside planting/seeding) A randomized, controlled study in the USA found that adding mulch and fertilizer, followed by sowing of seeds increased the abundance of seedlings for a minority of shrub species. The same study found that adding mulch and fertilizer, followed by sowing seeds had no significant effect on grass cover. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1707https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1707Mon, 23 Oct 2017 12:01:19 +0100Collected Evidence: Collected Evidence: Add gypsum to soil (alongside planting/seeding) One randomized, controlled study in South Africa found that adding gypsum to soils and sowing seeds increased survival of seedlings for one of two species Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1708https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1708Mon, 23 Oct 2017 12:05:42 +0100Collected Evidence: Collected Evidence: Add sulphur to soil (alongside planting/seeding) A randomized, replicated, controlled study in the UK found that adding sulphur to soil alongside sowing seeds did not increase heather cover in a majority of cases. One replicated, controlled study in the UK found that adding sulphur and spreading heathland clippings had mixed effects on cover of common heather, perennial rye-grass, and common bent. One randomized, controlled study in the UK found that adding sulphur to soil alongside planting of heather seedlings increased their survival, though after two years survival was very low. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1710https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1710Mon, 23 Oct 2017 13:17:21 +0100Collected Evidence: Collected Evidence: Strip/disturb topsoil (alongside planting/seeding) Two replicated, controlled studies in the UK found that removal of topsoil and addition seed/clippings increased cover of heathland plants or cover of heather and gorse. One controlled study in the UK found that soil disturbance using a rotovator and spreading clippings of heathland plants (alongside mowing) increased the number of heathland plants. One replicated, controlled study in the UK found that stripping the surface layers of soil and adding seed reduced the cover of perennial rye-grass. One randomized, replicated, paired, controlled study in the UK found that removal of topsoil and addition of the clippings of heathland plants did not alter the cover of annual grasses but led to a decrease in cover of perennial grasses. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1711https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1711Mon, 23 Oct 2017 13:29:32 +0100Collected Evidence: Collected Evidence: Plant seed balls A randomized, replicated, controlled study in the USA found that planting seed balls resulted in lower seedling numbers than sowing seed. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1712https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1712Mon, 23 Oct 2017 13:30:52 +0100Collected Evidence: Collected Evidence: Plant/sow seeds of nurse plants alongside focal plants A randomized, replicated, controlled study in the UK found that sowing seeds of nurse plants and heathland plants did not increase the cover of common heather. One replicated, randomized, controlled study in the USA found that sowing seeds of nurse plants and California sagebrush seeds together reduced survival of shrubs in more than half of cases. The same study found that California sagebrush biomass was also reduced when its seeds were sown with those of nurse plants. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1713https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1713Mon, 23 Oct 2017 13:44:40 +0100Collected Evidence: Collected Evidence: Plant/seed under established vegetation A replicated, randomized, controlled study in the USA found that sowing seed under established shrubs had mixed effects on blackbrush seedling emergence. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1714https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1714Mon, 23 Oct 2017 13:53:01 +0100Collected Evidence: Collected Evidence: Plant shrubs in clusters A randomized, controlled study in South Africa found that when shrubs were planted in clumps more of them died than when they were planted alone. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1715https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1715Mon, 23 Oct 2017 13:57:53 +0100Collected Evidence: Collected Evidence: Add root associated bacteria/fungi to introduced plants Two controlled studies (one of which was randomized) in Spain found that adding rhizobacteria to soil increased the biomass of shrubs. One of these studies also found an increase in shrub height. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1716https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1716Mon, 23 Oct 2017 14:00:24 +0100Collected Evidence: Collected Evidence: Raise awareness amongst the general public We found no studies that evaluated the effects of raising awareness amongst the general public 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%2F1717https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1717Mon, 23 Oct 2017 14:02:19 +0100Collected Evidence: Collected Evidence: Provide education programmes about shrublands We found no studies that evaluated the effects of providing education programmes 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%2F1718https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1718Mon, 23 Oct 2017 14:03:12 +0100Collected Evidence: Collected Evidence: Use prescribed burning to control trees One randomized, replicated, controlled, before-and-after trial in the USA found that burning to control trees did not change cover of two of three grass species. One randomized, controlled study in Italy found that prescribed burning to control trees reduced cover of common heather, increased cover of purple moor grass, and had mixed effects on the basal area of trees. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1721https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1721Wed, 22 Nov 2017 12:48:12 +0000Collected Evidence: Collected Evidence: Increase number of livestock and use prescribed burning to control trees One randomized, controlled, before-and-after study in Italy found that using prescribed burning and grazing to reduce tree cover reduced the cover of common heather and the basal area of trees. However, it did not alter the cover of purple moor grass. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1722https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1722Wed, 22 Nov 2017 14:37:45 +0000Collected Evidence: Collected Evidence: Use prescribed burning to control grass One replicated controlled, paired, before-and-after study in the UK found that prescribed burning to reduce the cover of purple moor grass, did not reduce its cover but did reduce the cover of common heather. One randomized, replicated, controlled study in the UK found that prescribed burning initially reduced vegetation height, but this recovered over time. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1723https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1723Wed, 22 Nov 2017 16:27:49 +0000Collected Evidence: Collected Evidence: Cut and use prescribed burning to control grass One randomized, replicated, controlled, paired, before-and-after study in the UK found that burning and cutting to reduce the cover of purple moor grass reduced cover of common heather but did not reduce cover of purple moor grass. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1724https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1724Wed, 22 Nov 2017 16:30:40 +0000Collected Evidence: Collected Evidence: Use herbicide and prescribed burning to control grass One randomized, replicated, controlled, paired, before-and-after study in the UK found that burning and applying herbicide to reduce the cover of purple moor grass reduced cover of common heather but did not reduce cover of purple moor grass. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1725https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1725Wed, 22 Nov 2017 16:31:55 +0000Collected 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 +0000Collected Evidence: Collected Evidence: Disturb vegetation One randomized, replicated, controlled study in the UK found that vegetation disturbance did not increase the abundance or species richness of specialist plants but increased the abundance of generalist plants. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1727https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1727Thu, 23 Nov 2017 11:47:54 +0000Collected Evidence: Collected Evidence: Disturb topsoil A controlled study in a former pine plantation in South Africa found that digging soil did not alter vegetation cover or the density of native plants. One randomized, replicated, controlled study in the UK found that soil disturbance increased the abundance or species richness of specialist and generalist plant species. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1728https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1728Thu, 23 Nov 2017 11:49:36 +0000Collected Evidence: Collected Evidence: Add topsoil (alongside planting/seeding) One randomized, replicated, paired, controlled study in the USA found that addition of topsoil alongside sowing of seed increased the biomass of grasses but reduced the biomass of forbs in comparison to addition of topsoil alone. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1857https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1857Fri, 01 Dec 2017 14:27:24 +0000Collected Evidence: Collected Evidence: Remove residential or commercial developmentWe found no studies that evaluated the effects, on vegetation, of removing residential or commercial development to restore/create marshes or swamps.   ‘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%2F2946https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2946Mon, 01 Mar 2021 16:14:22 +0000Collected Evidence: Collected Evidence: Retain/create habitat linkages in developed areasWe found no studies that evaluated the effects, on marsh/swamp vegetation, of retaining or creating habitat linkages in developed areas.   ‘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%2F2947https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F2947Mon, 01 Mar 2021 16:14:48 +0000
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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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