Collected 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: Chill seeds of non-woody plants before sowing: freshwater wetlands Six studies evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of chilling their seeds before sowing. All six studies were in the USA. Five of the studies were in laboratories or greenhouses. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE   OTHER Germination/emergence (6 studies): All six replicated, controlled studies in the USA found that chilling (at 1–10°C) seeds of herbaceous plants before sowing either increased or had no significant effect on their germination rate. Within studies, the direction and/or size of the effect depended on factors such as the duration of chilling, species, conditions (light/temperature) after sowing, and sowing site (restored vs natural meadows). One replicated, randomized, controlled study in the USA found that freezing sawgrass Cladium jamaicense seeds before sowing reduced their germination rate. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3367https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3367Mon, 12 Apr 2021 07:33:28 +0100Collected Evidence: Collected Evidence: Chill 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 chilling 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%2F3368https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3368Mon, 12 Apr 2021 07:33:39 +0100Collected Evidence: Collected Evidence: Chill tree/shrub seeds before sowing: freshwater wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of freshwater wetlands – of chilling 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%2F3369https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3369Mon, 12 Apr 2021 07:33:49 +0100Collected Evidence: Collected Evidence: Chill tree/shrub seeds before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of brackish/saline wetlands – of chilling 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%2F3370https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3370Mon, 12 Apr 2021 07:33:57 +0100Collected Evidence: Collected Evidence: Heat seeds of non-woody plants before sowing: freshwater wetlands One study evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of heating 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 sawgrass Cladium jamaicense seeds dipped in hot water or dried in an oven before sowing had a similar germination rate to seeds that had not been heated. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3371https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3371Mon, 12 Apr 2021 07:43:44 +0100Collected Evidence: Collected Evidence: Heat 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 heating 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%2F3372https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3372Mon, 12 Apr 2021 07:43:54 +0100Collected Evidence: Collected Evidence: Heat tree/shrub seeds before sowing: freshwater wetlands One study evaluated the effects – on trees/shrubs typical of freshwater wetlands – of heating their seeds before sowing. The study was in a laboratory in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE          OTHER Germination/emergence (1 study): One replicated, controlled study in a laboratory in the USA found that heating baldcypress Taxodium distichum seeds in a flame before sowing reduced their germination rate. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3373https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3373Mon, 12 Apr 2021 07:44:05 +0100Collected Evidence: Collected Evidence: Heat tree/shrub seeds before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of brackish/saline wetlands – of heating 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%2F3374https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3374Mon, 12 Apr 2021 07:44:18 +0100Collected Evidence: Collected Evidence: Expose seeds to light before sowingWe found no studies that evaluated the effects – on emergent wetland plants – of exposing their seeds to light 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%2F3375https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3375Mon, 12 Apr 2021 08:22:11 +0100Collected Evidence: Collected Evidence: Physically damage seeds of non-woody plants before sowing: freshwater wetlands Three studies evaluated the effects – on emergent, non-woody plants typical of freshwater wetlands – of physically damaging their seeds before sowing. All three studies were in greenhouses or laboratories in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE   OTHER Germination/emergence (3 studies): Two replicated, controlled studies (one also randomized) in greenhouses in the USA found that rubbing seeds of herbaceous plants with sandpaper before sowing had no significant effect on their germination rate. One replicated, randomized, paired, controlled study in a laboratory in the USA found that removing the sac-like seed coating before sowing typically increased, and did not reduce, the germination rate of sedges Carex spp. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3376https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3376Mon, 12 Apr 2021 08:22:24 +0100Collected Evidence: Collected Evidence: Physically damage 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 physically damaging 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%2F3377https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3377Mon, 12 Apr 2021 08:22:39 +0100Collected Evidence: Collected Evidence: Physically damage tree/shrub seeds before sowing: freshwater wetlands One study evaluated the effects – on trees/shrubs typical of freshwater wetlands – of physically damaging their seeds before sowing. The study was in a laboratory in the USA. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE          OTHER Germination/emergence (1 study): One replicated, controlled study in a laboratory in the USA found that cutting baldcypress Taxodium distichum seeds in half before sowing reduced their germination rate. Growth (1 study): The same study found that cutting baldcypress Taxodium distichum seeds in half before sowing had no significant effect on the height of surviving seedlings, 30 days after germination. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3378https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3378Mon, 12 Apr 2021 08:22:48 +0100Collected Evidence: Collected Evidence: Physically damage tree/shrub seeds before sowing: brackish/saline wetlandsWe found no studies that evaluated the effects – on trees/shrubs typical of brackish/saline wetlands – of physically damaging 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%2F3379https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3379Mon, 12 Apr 2021 08:23:06 +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.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust
For a full list of, and information about, our champions:
All Evidence Champions
About our champions, why and how to become one:
Become an Evidence Champion

This website uses Cookies

We use limited Cookies to run the site and to analyse our traffic (none for site vendors). By using this site, you will be providing your consent to our use of Cookies.

Accept & continue