Collected Evidence: Collected Evidence: Use flotation devices to support planted vegetationWe found no studies that evaluated the effects of using flotation devices to support emergent vegetation planted in wetlands.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3340https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3340Sun, 11 Apr 2021 16:45:23 +0100Collected Evidence: Collected Evidence: Plant non-woody plants into moisture-retaining peat pots: freshwater wetlands One study evaluated the effects of using moisture-retaining peat pots when planting emergent, non-woody vegetation in freshwater wetlands. The study was in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE Individual species abundance (1 study): One replicated, randomized, paired, controlled study in a wetland in the USA found that tussock sedge Carex stricta cover was similar across plots, after two growing seasons, whether sedges were planted into peat pots or into existing wetland soil. VEGETATION STRUCTURE Individual plant size (1 study): One replicated, randomized, paired, controlled study in a wetland in the USA found that the biomass of tussock sedge Carex stricta plants was similar, after two growing seasons, whether they were planted into peat pots or into existing wetland soil. OTHER Survival (1 study): One replicated, randomized, paired, controlled study in a wetland in the USA found that the survival rate of tussock sedge Carex stricta plants was similar, after two growing seasons, whether they were planted into peat pots or into existing wetland soil. Growth (1 study): The same study found that the growth rate of tussock sedge Carex stricta was typically similar, over two growing seasons, when planted into peat pots or into existing wetland soil. However, in a dry area and in a dry year, planting in peat pots did increase the growth rate. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3341https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3341Sun, 11 Apr 2021 16:45:47 +0100Collected Evidence: Collected Evidence: Plant trees/shrubs into moisture-retaining peat pots: freshwater wetlandsWe found no studies that evaluated the effects of using moisture-retaining peat pots when planting trees/shrubs in freshwater wetlands.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3343https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3343Sun, 11 Apr 2021 16:46:17 +0100Collected Evidence: Collected Evidence: Plant trees/shrubs into moisture-retaining peat pots: brackish/saline wetlandsWe found no studies that evaluated the effects of using moisture-retaining peat pots when planting trees/shrubs in brackish/saline wetlands.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3344https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3344Sun, 11 Apr 2021 16:46:35 +0100Collected Evidence: Collected Evidence: Plant vegetation into heavy containersWe found no studies that evaluated the effects of planting emergent wetland vegetation into heavy containers.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3345https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3345Sun, 11 Apr 2021 16:55:25 +0100Collected Evidence: Collected Evidence: Prune roots of non-woody plants before planting: freshwater wetlandsWe found no studies that evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of pruning their roots before planting.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3355https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3355Sun, 11 Apr 2021 17:23:33 +0100Collected Evidence: Collected Evidence: Prune roots of non-woody plants before planting: brackish/saline wetlandsWe found no studies that evaluated the effects – on emergent, non-woody plants typical of brackish/saline wetlands – of pruning their roots before planting.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3356https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3356Sun, 11 Apr 2021 17:23:56 +0100Collected Evidence: Collected Evidence: Prune roots of trees/shrubs before planting: freshwater wetlands Two studies evaluated the effects – on trees/shrubs typical of freshwater wetlands – of pruning their roots before planting. Both studies were in the USA. One study was in a laboratory. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE   OTHER Survival (2 studies): One replicated, controlled study in created wetlands in the USA reported that root-pruned red maple Acer rubrum seedlings had a higher survival rate than unpruned seedlings, 1–2 years after planting. One replicated, randomized, controlled study in a laboratory in the USA found that root-pruned and unpruned Nuttall oak Quercus nuttallii seedlings had similar survival rates, 108 days after planting. Growth (1 study): One replicated, randomized, controlled study in a laboratory in the USA found that root-pruned and unpruned Nuttall oak Quercus nuttallii seedlings grew in height by a similar amount over the first 108 days after planting. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3357https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3357Sun, 11 Apr 2021 17:24:04 +0100Collected Evidence: Collected Evidence: Prune roots of trees/shrubs before planting: brackish/saline wetlandsWe found no studies that evaluated the effects the effects – on trees/shrubs typical of brackish/saline wetlands – of pruning their roots before planting.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3358https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3358Sun, 11 Apr 2021 17:24:15 +0100Collected Evidence: Collected Evidence: Soak non-woody plants before planting: freshwater wetlandsWe found no studies that evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of soaking them before planting.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3359https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3359Sun, 11 Apr 2021 17:33:05 +0100Collected Evidence: Collected Evidence: Soak non-woody plants before planting: brackish/saline wetlandsWe found no studies that evaluated the effects – on emergent, non-woody plants typical of brackish/saline wetlands – of soaking them before planting.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3360https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3360Sun, 11 Apr 2021 17:33:18 +0100Collected Evidence: Collected Evidence: Soak trees/shrubs before planting: freshwater wetlands One study evaluated the effects – on trees/shrubs typical of freshwater wetlands – of soaking them before planting. The study was in a greenhouse in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE Biomass/plant (1 study): One replicated, randomized, controlled study in a greenhouse in the USA found that soaking black willow Salix nigra cuttings before planting had no significant effect on the above-ground biomass of surviving seedlings, over the 48 days after planting. OTHER Survival (1 study): One replicated, randomized, controlled study in a greenhouse in the USA found that the effect, on survival, of soaking black willow cuttings before planting depended on the water regime after planting. However, all cuttings soaked for 15 days before planting died within 42 days of planting. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3361https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3361Sun, 11 Apr 2021 17:33:34 +0100Collected Evidence: Collected Evidence: Soak trees/shrubs before planting: brackish/saline wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of brackish/saline wetlands – of soaking them before planting.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3362https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3362Sun, 11 Apr 2021 17:33:44 +0100Collected Evidence: Collected Evidence: Soak seeds of non-woody plants before sowing: freshwater wetlands One study evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of soaking their seeds before sowing. The study was in a greenhouse in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE   OTHER Germination/emergence (1 study): One replicated, randomized, controlled study in a greenhouse in the USA found that soaking bulrush seeds in water before sowing typically had no significant effect on their germination rate – especially amongst seeds that had not been manipulated in any other way before soaking. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3363https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3363Sun, 11 Apr 2021 20:16:17 +0100Collected Evidence: Collected Evidence: Soak seeds of non-woody plants before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on emergent, non-woody plants typical of brackish/saline wetlands – of soaking their seeds before sowing.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3364https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3364Sun, 11 Apr 2021 20:16:50 +0100Collected Evidence: Collected Evidence: Soak tree/shrub seeds before sowing: freshwater wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of freshwater wetlands – of soaking their seeds before sowing.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3365https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3365Sun, 11 Apr 2021 20:17:00 +0100Collected Evidence: Collected Evidence: Soak tree/shrub seeds before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of brackish/saline wetlands – of soaking their seeds before sowing.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3366https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3366Sun, 11 Apr 2021 20:17:12 +0100Collected Evidence: Collected Evidence: Treat seeds of non-woody plants with chemicals before sowing: freshwater wetlands Six studies evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of treating their seeds with chemicals before sowing. All six studies were in greenhouses or laboratories in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE   OTHER Germination/emergence (6 studies): Of six replicated, controlled studies in greenhouses or laboratories in the USA, five identified chemicals that sometimes increased, and did not significantly reduce, the germination rate of herb seeds: potassium nitrate, nitric acid and bleach. The effect of these chemicals depended on factors such as the age of the seeds, the species and other pre-sowing treatments. Two of the studies identified chemicals that never had a significant effect on the germination rate of herb seeds: a plant hormone and sulfuric acid. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3380https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3380Mon, 12 Apr 2021 08:30:30 +0100Collected Evidence: Collected Evidence: Treat seeds of non-woody plants with chemicals before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on emergent, non-woody plants typical of brackish/saline wetlands – of treating their seeds with chemicals before sowing.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3381https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3381Mon, 12 Apr 2021 08:30:40 +0100Collected Evidence: Collected Evidence: Treat tree/shrub seeds with chemicals before sowing: freshwater wetlands Two studies evaluated the effects – on trees/shrubs typical of freshwater wetlands – of treating their seeds with chemicals before sowing. Both studies were in one laboratory in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE          OTHER Germination/emergence (2 studies): Two replicated, controlled studies in a laboratory in the USA found that soaking baldcypress Taxodium distichum seeds in weak sodium hydroxide increased their germination rate. One of the studies found that soaking in ethyl alcohol and/or hydrochloric acid reduced the germination rate. One of the studies found that soaking in stronger sodium hydroxide, or hydrogen peroxide and ethyl alcohol, had no significant effect on the germination rate. Growth (1 study): One replicated, controlled study in a laboratory in the USA found that soaking baldcypress Taxodium distichum seeds in chemicals before sowing typically had no significant effect on the height of surviving seedlings, 30 days after germination. Soaking in ethyl alcohol, however, reduced seedling height. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3382https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3382Mon, 12 Apr 2021 08:30:47 +0100Collected Evidence: Collected Evidence: Treat tree/shrub seeds with chemicals before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of brackish/saline wetlands – of treating their seeds with chemicals before sowing.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3383https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3383Mon, 12 Apr 2021 08:31:05 +0100
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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