#tropicalgrassybiomes — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #tropicalgrassybiomes, aggregated by home.social.
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@HollyCo26588808 Where? Tree-planting is bad for #OpenNaturalEcosystems such as #TropicalGrassyBiomes and #Savannas.
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@hfalcke This sounded good until I read they plant trees. I really hope they are planting the correct trees in the right places, and are not misguided by false classification of savannas and other #TropicalGrassyBiomes as "degraded forests". Planting the wrong trees in the wrong place is a disaster for biodiversity in those places.
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C4 vegetation covers 17.5% of global land surface. C4 natural grass cover decreased from 2001-2019 (due to elevated CO2) and C4 crop cover increased (because of maize expansion).
C4 photosynthesis accounts for ~19% of global photosynthesis (~3% from C4 crops and ~16% from C4 natural grasses).
https://www.nature.com/articles/s41467-024-45606-3
Planting trees in the name of #reforestation is BAD for #TropicalGrassyBiomes.
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“…vegetation definitions that only consider tree cover are problematic for tropical grassy biomes…”
science.org/doi/10.1126/science.adj0899
#SavannasMatter
#TropicalGrassyBiomes
#forests #reforestation -
Forest & Non-forest can't be defined by tree cover alone.
The WRI's Trees Outside Forests Indicator of forest extent is based on defining land that has trees outside forests as "all human-managed urban and agricultural land with tree cover and all other land with greater than zero percent and less than 10 percent tree cover".
The definition misclassifies #TropicalGrassyBiomes that have >10% tree cover as 'forest'.
#BiomeAwarenessDisparity -
Millions of USD going into planting trees in Africa.
All based on arbitrary structural definitions of trees and forests.
https://greater-rift-valley-worldresources.hub.arcgis.com/
No inclusion of plant functional traits to distinguish #TropicalGrassyBiomes with fire-tolerant, shade-intolerant trees and shrubs from #forests with fire-intolerant, shade-intolerant trees.
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Why is it wrong to monitor global #forests using only vegetation structure?
"Monitoring global forests using only structural metrics – problems and solutions from a savanna viewpoint"
https://www.sciencedirect.com/science/article/pii/S0378112723006151
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Yes! Stop #forestization of #TropicalGrassyBiomes in the name of #forest "restoration". Stop the #Greenwashing.
https://mstdn.science/@KnowableMag/110939360119211152 -
Yes! Stop #forestization of #TropicalGrassyBiomes in the name of #forest "restoration". Stop the #Greenwashing.
https://mstdn.science/@KnowableMag/110939360119211152 -
Yes! Stop #forestization of #TropicalGrassyBiomes in the name of #forest "restoration". Stop the #Greenwashing.
https://mstdn.science/@KnowableMag/110939360119211152 -
Yes! Stop #forestization of #TropicalGrassyBiomes in the name of #forest "restoration". Stop the #Greenwashing.
https://mstdn.science/@KnowableMag/110939360119211152 -
@mongabay
The whole project should be canned. It's misguided and little more than #greenwashing funded by the #GlobalNorth. Many of the areas targeted for #reforestation are neither #deforested nor #degradedforest. They are natural #OpenBiomes such as #TropicalGrassyBiomes -
@mongabay
The whole project should be canned. It's misguided and little more than #greenwashing funded by the #GlobalNorth. Many of the areas targeted for #reforestation are neither #deforested nor #degradedforest. They are natural #OpenBiomes such as #TropicalGrassyBiomes -
@mongabay
The whole project should be canned. It's misguided and little more than #greenwashing funded by the #GlobalNorth. Many of the areas targeted for #reforestation are neither #deforested nor #degradedforest. They are natural #OpenBiomes such as #TropicalGrassyBiomes -
@mongabay
The whole project should be canned. It's misguided and little more than #greenwashing funded by the #GlobalNorth. Many of the areas targeted for #reforestation are neither #deforested nor #degradedforest. They are natural #OpenBiomes such as #TropicalGrassyBiomes -
@mongabay
The whole project should be canned. It's misguided and little more than #greenwashing funded by the #GlobalNorth. Many of the areas targeted for #reforestation are neither #deforested nor #degradedforest. They are natural #OpenBiomes such as #TropicalGrassyBiomes -
Using the FAO definition of “forest” leads to misclassification of extensive areas of #TropicalGrassyBiomes (tropical and subtropical grasslands and savannas) as "forests", especially in South America and Africa. If the definition of “forest” is based on tree cover, then global forest change monitoring is seriously flawed and can lead to gross exaggeration of global forest cover, deforestation, and estimates of forest carbon stocks.
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This is so WRONG! "Unlike in much of the tropics, fires in boreal and temperate forests are a natural and important part of the ecology" according to this World Resources Institute report.
https://research.wri.org/gfr/latest-analysis-deforestation-trends
Fires are a natural and important part of the ecology of Earth's #TropicalGrassyBiomes (tropical and subtropical grasslands and savannas) too.
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Are they really #forest fires, not #savanna fires?
Too much control of fires in #TropicalGrassyBiomes leads to their degradation through #WoodyPlantEncroachment.
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The multiple impacts of #FossilFuels.
Oil companies replace #TropicalGrassyBiomes with #TreePlantations to create "CO2 compensation forests" to offset their emissions.
#Greenwashing #BiodiversityLoss #ClimateChange
#SavannasMatterhttps://link.springer.com/article/10.1007/s42729-023-01230-6
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The multiple impacts of #FossilFuels.
Oil companies replace #TropicalGrassyBiomes with #TreePlantations to create "CO2 compensation forests" to offset their emissions.
#Greenwashing #BiodiversityLoss #ClimateChange
#SavannasMatterhttps://link.springer.com/article/10.1007/s42729-023-01230-6
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The multiple impacts of #FossilFuels.
Oil companies replace #TropicalGrassyBiomes with #TreePlantations to create "CO2 compensation forests" to offset their emissions.
#Greenwashing #BiodiversityLoss #ClimateChange
#SavannasMatterhttps://link.springer.com/article/10.1007/s42729-023-01230-6
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The multiple impacts of #FossilFuels.
Oil companies replace #TropicalGrassyBiomes with #TreePlantations to create "CO2 compensation forests" to offset their emissions.
#Greenwashing #BiodiversityLoss #ClimateChange
#SavannasMatterhttps://link.springer.com/article/10.1007/s42729-023-01230-6
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The multiple impacts of #FossilFuels.
Oil companies replace #TropicalGrassyBiomes with #TreePlantations to create "CO2 compensation forests" to offset their emissions.
#Greenwashing #BiodiversityLoss #ClimateChange
#SavannasMatterhttps://link.springer.com/article/10.1007/s42729-023-01230-6
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The FAO’s definition of #forest is based on tree height > 5 m and tree cover > 10%. They introduced the definition in 1980, based on UNESCO’s 'International classification and mapping of vegetation' published in 1973. The FAO’s definition has persisted for > 4 decades despite being outdated and leading to #TropicalGrassyBiomes (savannas) being falsely classified as ‘forest’, 'degraded forest' or 'deforested'.
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#TropicalGrassyBiomes like the #Cerrado of South America are under threat of degradation by #Forestization.
Stop large-scale #TreePlanting in #GrassyBiomes. #Savannas are NOT "degraded forests".
Stop mapping global "forests" in terms of vegetation height and woody cover alone. That leads to misclassification of savannas as #forests.
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#TropicalGrassyBiomes like the #Cerrado of South America are under threat of degradation by #Forestization.
Stop large-scale #TreePlanting in #GrassyBiomes. #Savannas are NOT "degraded forests".
Stop mapping global "forests" in terms of vegetation height and woody cover alone. That leads to misclassification of savannas as #forests.
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#TropicalGrassyBiomes like the #Cerrado of South America are under threat of degradation by #Forestization.
Stop large-scale #TreePlanting in #GrassyBiomes. #Savannas are NOT "degraded forests".
Stop mapping global "forests" in terms of vegetation height and woody cover alone. That leads to misclassification of savannas as #forests.
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#TropicalGrassyBiomes like the #Cerrado of South America are under threat of degradation by #Forestization.
Stop large-scale #TreePlanting in #GrassyBiomes. #Savannas are NOT "degraded forests".
Stop mapping global "forests" in terms of vegetation height and woody cover alone. That leads to misclassification of savannas as #forests.
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https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.13283
Great piece of #SavannaScience work by Corli Wigley-Coetsee and others showing factors other than large mammal herbivory, such as dispersal limitation, seed predation, or drought, may limit woody plant populations and communities in semi-arid #TropicalGrassyBiomes.
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News headlines like this create a negative perception of savannas in the eyes of the general public.
I can't read the whole NYT article, but I guess it's based on the recent paper in PNAS 119(52), e2203200119, which I have yet to read thoroughly, but my first impression was mixed. On the downside, portraying #TropicalGrassyBiomes as a stage in linear succession from grassland to forest is outdated, misleading and ignores current thinking in #SavannaScience.
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Excellent review of satellite remote sensing for mapping #GrassyBiomes at regional and global scales.
This is crucial for #SavannaScience and the prevention of #Forestization of #OpenNaturalEcosystems such as #TropicalGrassyBiomes.
The EU and FAO need to read this, and other recent related work, and then realise they need to update their antiquated definition of "forest" based only on veg structure and ignoring #FunctionalTraits.
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Excellent review of satellite remote sensing for mapping #GrassyBiomes at regional and global scales.
This is crucial for #SavannaScience and the prevention of #Forestization of #OpenNaturalEcosystems such as #TropicalGrassyBiomes.
The EU and FAO need to read this, and other recent related work, and then realise they need to update their antiquated definition of "forest" based only on veg structure and ignoring #FunctionalTraits.
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Excellent review of satellite remote sensing for mapping #GrassyBiomes at regional and global scales.
This is crucial for #SavannaScience and the prevention of #Forestization of #OpenNaturalEcosystems such as #TropicalGrassyBiomes.
The EU and FAO need to read this, and other recent related work, and then realise they need to update their antiquated definition of "forest" based only on veg structure and ignoring #FunctionalTraits.
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Excellent review of satellite remote sensing for mapping #GrassyBiomes at regional and global scales.
This is crucial for #SavannaScience and the prevention of #Forestization of #OpenNaturalEcosystems such as #TropicalGrassyBiomes.
The EU and FAO need to read this, and other recent related work, and then realise they need to update their antiquated definition of "forest" based only on veg structure and ignoring #FunctionalTraits.
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Excellent review of satellite remote sensing for mapping #GrassyBiomes at regional and global scales.
This is crucial for #SavannaScience and the prevention of #Forestization of #OpenNaturalEcosystems such as #TropicalGrassyBiomes.
The EU and FAO need to read this, and other recent related work, and then realise they need to update their antiquated definition of "forest" based only on veg structure and ignoring #FunctionalTraits.
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This grabbed my attention.
https://www.nature.com/articles/s41597-022-01774-9.I recently compiled data on leaf area. I was keen to compare for species with bipinnate compound leaves that are common in African #TropicalGrassyBiomes. For leaf area I used leaflet size from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77089275-1/general-information.
I downloaded their data (https://doi.org/10.17871/TRY.81). The metadata says leaf area is "in case of compound leaves the area of a leaflet lamina". I checked Acacia nilotica. Theirs: 1691.79 mm^^. Mine: 4.2 mm^^.
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It's time we stopped referring to fire and herbivores as 'disturbances' in #SavannaScience.
They are important *consumers* in #TropicalGrassyBiomes, and savanna plants are adapted to them.
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3/3
Then, saying "a linear relationship between AGB and Landsat 8 derived spectral variables" is a suitable approach "for monitoring and reporting of biomass baselines in low-biomass, open canopy woodlands for REDD+ projects" is the last straw for me, and others in #SavannaScience.
#TropicalGrassyBiomes are not "forests" and they are not "degraded forests". This mindset (especially when it leads to fire-suppression and tree planting) is what leads to degraded savannas.
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1/n
This is beyond cringe-worthy for anyone in #SavannaScience to read:
https://www.sciencedirect.com/science/article/pii/S0034425722003388?via%3Dihub
"Dryland forests in Southern Africa are currently experiencing high rates of forest loss as a result of overexploitation, wildfire, and herbivory..." is misleading.
There are no "dryland forests" in southern Africa. What they are referring to are #TropicalGrassyBiomes, where fire and herbivory are crucial.
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1/2
Great new contribution to #SavannaScience here:
https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.18648
Rico Holdo and Jesse Nippert argue that tree dominance in #TropicalGrassyBiomes is "precluded by ecohydrological constraints in dry savannas, and by fire and herbivores in wet savannas. Strong asymmetric grass-tree competition for soil moisture limits tree growth, exposing trees to persistent demographic bottlenecks."
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The descriptions and maps of #TropicalGrassyBiomes in the IUCN Global Ecosystem Typology (v2.1) are an excellent resource.
https://global-ecosystems.org/explore/biomes/T4
They are not based on the FAO's outdated definitions that perpetuate the misclassification of savannas as "forest" or "degraded forest".
They are based on current thinking about #OpenBiomes /
#OpenNaturalEcosystems in the framework of #AlternateBiomeStates.https://www.sciencedirect.com/science/article/pii/S0169534722000611?via%3Dihub
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"Due to its vast landmass and unique ecosystems, Africa has the potential to contribute significantly to land-based mitigation and adaptation interventions, offering an estimated 21% of global potential for increased carbon storage on land."
#Forestization threatens #TropicalGrassyBiomes.
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"Due to its vast landmass and unique ecosystems, Africa has the potential to contribute significantly to land-based mitigation and adaptation interventions, offering an estimated 21% of global potential for increased carbon storage on land."
#Forestization threatens #TropicalGrassyBiomes.
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"Due to its vast landmass and unique ecosystems, Africa has the potential to contribute significantly to land-based mitigation and adaptation interventions, offering an estimated 21% of global potential for increased carbon storage on land."
#Forestization threatens #TropicalGrassyBiomes.
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"Due to its vast landmass and unique ecosystems, Africa has the potential to contribute significantly to land-based mitigation and adaptation interventions, offering an estimated 21% of global potential for increased carbon storage on land."
#Forestization threatens #TropicalGrassyBiomes.
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"Due to its vast landmass and unique ecosystems, Africa has the potential to contribute significantly to land-based mitigation and adaptation interventions, offering an estimated 21% of global potential for increased carbon storage on land."
#Forestization threatens #TropicalGrassyBiomes.